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Journal articles on the topic 'Main engine'
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Ramadhani, Dimitry Rizal, and Erifive Pranatal. "Analysis of Design Changes from Main Engine Diesel Engine to Electric Engine on Fishing Vessels." Journal of Applied Sciences, Management and Engineering Technology 5, no. 1 (2024): 7–17. http://dx.doi.org/10.31284/j.jasmet.2024.v5i1.5965.
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Fishing vessels in Indonesia conventionally use diesel engines as their main propulsion engine. However, the use of diesel engines has quite a bad impact on the surrounding environment. So the latest innovations using alternative energy are needed. One of them is the use of electric engines as a replacement for diesel engines in the ship's main propulsion engine. The use of this electric machine will have a friendly impact on the environment. Apart from that, you don't need to spend a lot of money to maintain this electric machine. We can see this by comparing the ship's thrust requirements with maximum speed.
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Nikolić, N., N. Crnogorac, J. Dorić, D. Feher, and S. Galamboš. "A comparison of main bearings load of two-cylinder “V” and boxer motorcycle engines." IOP Conference Series: Materials Science and Engineering 1271, no. 1 (2022): 012006. http://dx.doi.org/10.1088/1757-899x/1271/1/012006.
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Abstract The paper deals with determining the load of the crankshaft main bearings in two-cylinder motorcycle engines. Two cylinder arrangements, used in two-cylinder motorcycle engines, are considered - the boxer-engine and V-engine. The aim of the research is to determine the influence of cylinder arrangement on the magnitude and circumferential distribution of the bearing load of the engines considered. For this purpose, models of a two-cylinder boxer engine and a corresponding V-engine crankshaft drives were developed using multibody dynamics simulation software. Previously, by using a one-dimensional gas analysis software the engine cycles were simulated in order to determine the cylinder pressure required to simulate piston dynamics. As a result of the dynamics simulations, bearing load diagrams of the boxer- and V-engine were obtained, which were then compared and analyzed.
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Islam, Rabiul, and Samuel Martin. "A Reliability Assessment of a Vessel’s Main Propulsion Engine." Journal of Marine Science and Engineering 13, no. 7 (2025): 1278. https://doi.org/10.3390/jmse13071278.
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Ocean-going vessels rely on marine diesel engines, referred to as the main engine, to carry the vessel’s load and ensure safe travel. These engines play a critical role, as their operation impacts on all aspects of the vessel’s functionality. To meet increasing demands for extended run times while maintaining reliability, it is essential to address the risks of main engine failure. Previous studies have highlighted numerous accidents resulting from such failures. Consequently, the reliability of the main propulsion engine is a crucial component of safe vessel operation. This study addresses the lack of methodologies for predicting engine reliability using failure running hours (FRHs). A data-driven model was developed using FRH data collected from marine engineers during on-board maintenance operations. Additionally, fault tree analysis (FTA) was employed to calculate the reliability of individual subsystems and the overall main propulsion engine. The findings indicate that the lube oil system, freshwater cooling system, scavenge system, and fuel system reach 0% reliability at approximately 2000 h, 14,000 h, 2500 h, and 1400 h of operation, respectively. Additionally, the reliability of the main propulsion engine drops to 0% after around 900 h of operation. By incorporating this prediction model, ship operators can better schedule maintenance, significantly enhancing engine reliability and reducing maritime accidents. This approach contributes to safer and more efficient operations for commercial marine systems. This study represents a vital step toward improving the reliability of ocean-going vessels.
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Harada, Renpei. "Damage of Main Bearings in Main Engine." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 34, no. 5 (1999): 310–19. http://dx.doi.org/10.5988/jime1966.34.310.
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Gorb, Sergii, Maksym Levinskyi, and Mykola Budurov. "Sensitivity Optimisation of a Main Marine Diesel Engine Electronic Speed Governor." Scientific Horizons 24, no. 11 (2022): 9–19. http://dx.doi.org/10.48077/scihor.24(11).2021.9-19.
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Electronic speed governors have become widespread on marine diesel engines. In comparison with hydromechanical ones, they have an additional setting parameter – input signal sensitivity. This parameter allows changing the response of governors to high-frequency disturbances. In camshaft diesel engines, such disturbances are generated when the cams run over fuels pump push rods, while in ME (MAN Energy Solutions) or RT-flex (Wärtsilä) engines they result from the use of inductive sensors with a serrated tape on the diesel shaft for speed measurement. If the engine is used as a main engine on vessels, the governor’s sensitivity additionally allows governors to vary the response to propeller shaft resistance moment fluctuations in sea waves conditions. In practice the value of sensitivity of electronic speed governors of main marine engines is selected intuitively. As a result, the adjustment of governors doesn’t provide satisfactory stability of speed modes at the change of sea conditions. The study aims to develop a methodology for adjusting the sensitivity of main engines electronic speed governors with considering the stochasticity of the load on the diesel engine in sea waves state. The study was carried out using the systems of automatic speed control model, which is based on the assumption of relatively small deviations of diesel engine shaft rotation speed and load parameters at sea waves conditions. Considering the character and magnitude of change of load on diesel engine at sea waves conditions depend on many variables of external conditions (waves levels, course of a vessel in relation to wind-wave conditions, wind gusts, vessel’s loading condition, given speed of a vessel), any set value of sensitivity of electronic speed governors appears to be optimum only for a particular case of vessel movement in sea waves state. The scientific novelty is defined by the fact that recommendations on the choice of governor sensitivity are determined with considering stochasticity of propeller shaft resistance moment fluctuations at sea waves conditions, that increased accuracy, and validity of recommendations. The practical significance of the research consist in the increase of stability of speed modes of the main engine with electronic speed governor at various sea waves conditions
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Murawski, Lech. "Influence of Marine Main Engine Foundations on the Results of Vibration Calculations." Journal of KONES 26, no. 1 (2019): 95–101. http://dx.doi.org/10.2478/kones-2019-0012.
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Abstract The article presents an influence of foundations of slow-speed main engine body on the results of numerical analysis of the engine dynamic stiffnesses and thermal deformations. The engine body is much stiffer than its foundation pads and ship hull (double bottom) – boundary conditions of the engine. Especially for the high power, marine engines, the correct model of the boundary conditions plays a key role during the analyses. Therefore, modelling method of engine foundation (boundary conditions) of that kind of model is essential during the analyses. During shaft line alignment and crankshaft springing analyses, knowledge of dynamic stiffnesses characteristics and thermal displacements of radial (main) bearings is significant. Those data of marine main engine body are difficult to estimate because of lack of available documentation and complicated shape of the engine and ship hull. The article presents the methodology of the characteristics determination of the marine engine's body as well as the example of computations for a MAN B&W K98MC type engine (power: 40000 kW, revolutions: 94 rpm) mounted on a 3000 TEU (twenty-foot container equivalent unit) container ship (length: 250 m). Numerical analyses were performed with usage of Nastran software based on Finite Element Method. The FEM model of the engine body comprised over 800 thousand degree of freedom.
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Fajar, Imron Achmadi, and Miftakhul Jannah Dwi Ratna. "TECHNICAL ANALYSIS OF ENGINE PROPELLER MATCHING KRI X AFTER MAIN ENGINE REPOWERING." International Journal of Marine Engineering and Applications 1, no. 1 (2024): 50–59. https://doi.org/10.30649/ijmea.v1i1.372.
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The gas turbine which is one of the main engines of KRI X is not used anymore because of the amount of damaged material. In 2017 it was decided to replace its main engine. Ships that previously used gas turbines and two diesels as the main engine are replaced with four MTU diesel brands with 4000 HP power and 2100 rpm rotation per engine. With a fixed propeller and a power change on the main engine, the matching point of the main engine also changes. Referring to the problem, this study conducted an assessment of engine propeller matching obtained after repowering the main engine, by calculating the pricing of the ship and calculating the power required by the ship. The calculation of ship resistance is done in two ways that is with the help of running software maxsurf with the Holtrop method and calculation by using an empirical formula. Having known the price of the ship's resistance and power required, then calculated the speed of the ship with the new main engine and the variation of the pitch propeller. The result of this research obtained the operating point (matching point) which resulted in optimum speed obtained at the main rotation condition of 1974 rpm, propeller rotation 452,666 rpm, with 85% power loading that is 6152,426 kW, ship speed reached 17,855 Knot, and in this condition is deemed to be by the operation of the continuous service rating.
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Nazarenko, Sergej, Mykola А. Tkachuk, and Svitlana Marusenko. "MAIN WORKS OF PROFESSOR YA. M. MAYER (A REVIEW)." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 1 (December 30, 2021): 64–73. http://dx.doi.org/10.20998/2079-0775.2021.1.07.
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The article is devoted to an overview of the scientific and pedagogical activities of a prominent scientist in the field of engine building and mechanical engineering, one of the organizers of the higher school of Ukraine, a public figure, Professor Ya. M. Mayer. In the biographical work, the first study of complex life path and versatile creative heritage of the last rector of Kharkiv Technological Institute, the founder and director of the Ukrainian Research Institute of Internal Combustion Engines, director and scientific leader of the Ukrainian Research Aviation Diesel Institute, one of the creators of the famous V-2 diesel engine, one of the heads of the department «Theory of Mechanisms and Machines» Yakov Moiseevich Mayer. Keywords: engine; engineering science; higher technical education; Ya. M. Mayer; KhPI; scientific school; SE “KhKBD”; diesel
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Takasaki, Koji. "CO2 Reduction from Main Engine." Journal of The Japan Institute of Marine Engineering 50, no. 2 (2015): 198–201. http://dx.doi.org/10.5988/jime.50.198.
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Tursunov, Dilshod. "THE MAIN FACTORS THAT INCREASE THE THERMAL LOAD OF GAS ENGINES." International Journal of Advance Scientific Research 02, no. 12 (2022): 18–26. http://dx.doi.org/10.37547/ijasr-02-12-03.
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In this article, the increase in the thermal load of engines running on gas fuel is considered. Simply put, after starting a cold engine, it first heats up, after which the processes of keeping the heat within the specified limits of the cooling system are studied.
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Rommelaere, Tim Philippe, Michael Klaas, and Wolfgang Schröder. "Comparison Of A Molecularly-Controlled Combustion Engine To A DISI Engine." Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics 21 (July 8, 2024): 1–10. http://dx.doi.org/10.55037/lxlaser.21st.32.
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In addition to the increased use of electromobility, significant improvements in the efficiency of internal combustion engines (ICE) to achieve a considerable reduction of emissions is crucial to advance the transition towards a sustainable transport sector. One approach to increase the efficiency of combustion engines is active pre-chamber ignited engines (Molecularly Controlled Combustion Engines, MCC). The traditional spark ignition is replaced by a chamber that ignites a secondary fuel. The burning fuel is emitted from the pre-chamber via multiple holes, igniting the fuel air mixture in the main combustion chamber. To eject the flame jets tangentially to the pent roof, the pre-chamber protrudes into the main chamber in the center of the main chamber’s pent roof. This particular geometry of an MCCengine, however, alters the flow field inside MCC-engines. To facilitate future developments around MCC-engines and to understand the interactions of the flow field with the pre-chamber, a Stereo Particle-Image Velocimetry (SPIV) study is conducted in an optically accessible MCC-engine model. Previous velocity field data, which were acquired using a Direct Injection Spark Ignition (DISI) engine configuration at the same operating point as the MCC-engine, are compared to those of the MCC-engine. Phase-averaged velocity field data of both engines acquired during the intake stroke are compared based on their in-plane velocity fields and the in-plane vorticity. The two engine configurations show significantly different magnitudes of velocity in their combustion chamber flow field. In the MCC-engine, a downwash flow component can be attributed to flow deflection caused by the pre-chamber protruding from the engine’s pent roof. One important flow feature of ICE, the tumble vortex, is analyzed for both engine configurations. An increased absolute vorticity and a different temporal development of the tumble vorticity is noted for the MCC-engine. The tumble flap, an engine component that influences the intake flow distribution, is considered a main contributor to the difference in flow velocity and tumble vorticity.
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Sidle, Stacy, Ananth Sridharan, Inderjit Chopra, Matt Feshler, and Peter Kull. "Investigation of Engine–Airframe Vibration Due to Main Rotor Hub Loads Using a Substructuring Framework." Journal of the American Helicopter Society 64, no. 4 (2019): 1–16. http://dx.doi.org/10.4050/jahs.64.042001.
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This paper presents a methodology to analyze the coupled structural dynamic response of an elastic airframe and engines of a helicopter in response to main rotor hub loads. Transfer functions of individual components (airframe, engine, mount struts, and torque tube) are coupled together using a substructuring approach to obtain consistent coupled solutions of the entire system. Using this approach, a twin-engine, four-bladed helicopter is analyzed using NASTRAN-based models of the airframe and engines. This efficient substructuring approach is validated against the fully coupled NASTRAN model using forced response studies. Characteristics of the mount properties, i.e., the torque tube stiffness, and aft mount stiffness and damping are systematically varied to study their effect on the engine vibration response. The fore and aft mount element properties for minimizing the 8P engine response are identified without increasing 4P response. A compromise between 4P and 8P response is also identified from parametric studies of rear mount properties, using just three parameters to represent the design space. Using the substructuring approach presented here, future studies can be performed to rapidly match airframe characteristics with available engines at approximately 1000 times the speed of running a detailed finite element model (millions of degrees of freedom), without any reduction in accuracy.
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Okumuş, Fatih, Araks Ekmekçioğlu, and Selin Soner Kara. "Modelling Ships Main and Auxiliary Engine Powers with Regression-Based Machine Learning Algorithms." Polish Maritime Research 28, no. 1 (2021): 83–96. http://dx.doi.org/10.2478/pomr-2021-0008.
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Abstract Based on data from seven different ship types, this paper provides mathematical relationships that allow us to estimate the main and auxiliary engine power of new ships. With these mathematical relationships we can estimate the power of the engine based on the ship’s length (L), gross tonnage (GT) and age. We developed these approaches using simple linear regression, polynomial regression, K-nearest neighbours (KNN) regression and gradient boosting machine (GBM) regression algorithms. The relationships presented here have a practical application: during the pre-parametric design of new ships, our mathematical relationships can be used to estimate the power of the engines so that more environmentally friendly ships may be built. In addition, with the machine learning methodology, the prediction of the main engine (ME) and auxiliary engine (AE) powers used in the numerical calculation of ship-based emissions provides data for researchers working on emission calculations. We conclude that the GBM regression algorithm provides more accurate solutions to estimate the main and auxiliary engine power of a ship than other algorithms used in the study.
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Polyvoda, O. V., V. V. Polyvoda, and A. L. Simanenkov. "METHOD OF THE SHIP MAIN ENGINE CONDITION OPERATIONAL DIAGNOSTICS." Scientific Bulletin Kherson State Maritime Academy 1–2, no. 26–27 (2023): 133–43. http://dx.doi.org/10.33815/2313-4763.2023.1-2.26-27.133-143.
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Rumac, Filip, Darko Glujić, and Dean Bernečić. "The influence of SCR on main engine parameters." Pomorstvo 36, no. 1 (2022): 113–22. http://dx.doi.org/10.31217/p.36.1.13.
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Air pollution from ships is increasing due to higher global demand of goods, and with them, global emission standards as well. These standards are prescribed by MARPOL Annex VI and the introduction of emission control areas (ECA). Ships built before 1990. do not have to comply with these rules, but ships built after the early 2000. must follow “NOx Emission Tier I”, which allows 17g/kWh NOx (for the slow speed diesel engines with <130 rpm), and selective catalytic reactors (SCR) are not necessary. Tier III NOx Emission standard was enforced in 2016 and it requires an 80% reduction in NOx emission compared to the Tier I, specifically 3.4 g/kWh, which can not be achieved without SCR or without using some other types of fuels. The focus of this paper is to do analysis how the ammonia dosage to SCR affects to the NOx formation in exhaust gasses on various engine speed (loads), as well as how it affects to some important engine parameters and specific fuel oil consumption (SFOC). The analysis was performed on Kongsberg engine room simulator (ERS), MC 90-V Model, as well as on MATLAB by using mathematical models. All external influences are excluded from the analysis like wind or rough sea. All data on different scenarios has been recorded after prolonged period to avoid inconsistencies. The results are shown graphically, and conclusions are presented.
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Suharso, Didik Dwi, Imam Syafi'i, and Anicitus Agung Nugroho. "Valve Setting Using Fuzzy Logic Method To Control Main Engine Coolant Flow." IJEEIT : International Journal of Electrical Engineering and Information Technology 6, no. 2 (2023): 83–94. http://dx.doi.org/10.29138/ijeeit.v6i2.2533.
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The main objective of this research is to improve the operating efficiency and performance of ship main engines by optimizing coolant flow. Improper coolant flow can cause excessive temperature rise in the engine, which in turn can reduce engine life and efficiency. In this research, the coolant flow control system is implemented using the fuzzy logic method. Fuzzy logic allows modeling that is more adaptive to parameter variations and uncertainties in the operational environment. Fuzzy rules are developed based on practical knowledge of experts and operational data related to the host machine. The test was carried out through a simulation using a water flow control circuit that supplies the coolant to the ship's main engine with the main components being an ESP32 microcontroller chip and three DS18B20 temperature sensors. The results of this research show that the use of fuzzy logic in regulating coolant flow is able to provide a faster and more accurate response to changes in engine operational conditions. This has the potential to increase cooling efficiency and prevent engine over-temperatures, which can ultimately increase the overall service life and performance of the host engine. The practical implications of the results of this research can be applied in the development of more intelligent and adaptive control systems for various types of host machines, with the potential to increase operating efficiency and reduce the risk of damage due to excessive temperatures
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Karimaei, Hadiseh, and H. R. Chamani. "Effect of Crankshaft and Crankcase Material Stiffness on Load Distribution in Main Bearings." International Journal of Automotive and Mechanical Engineering 15, no. 4 (2018): 5941–56. http://dx.doi.org/10.15282/ijame.15.4.2018.16.0453.
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In multi-cylinder diesel engines, hydrodynamic pressure distribution of main bearings has significant effect on the load distribution applied on engine crankcase, therefore, has an effect on the stress distribution and deflection of crankcase. Flexibility of crankshaft and crankcase assembly has significant effect on load distribution in engine main bearings. In this paper, the effect of elastic deformations of both crankshaft and crankcase on the load distribution in the main bearings is studied. Considering deformations of crankcase and crankshaft together with the elasto-hydrodynamic (EHD) analysis of main bearing is vital to obtain the realistic load distribution and accurate main bearing performance. At the beginning, the results of flexible body dynamic analysis of engine crank train with considering EHD joint for main bearings are presented and the main bearing force and moment are compared with rigid body dynamic analysis. Then, the effects of crankshaft and crankcase flexibilities on main bearing force and moment are studied. Several models with different flexibilities and stiffness of crankcase and crankshaft were prepared using Elasto-hydrodynamic simulation of diesel engine main bearings. According to the results, the load distribution on the engine main bearings and consequently the bearing shell deformation are affected by crankcase and crankshaft elasticities. A fast and time-saving method to obtain reasonably accurate results is proposed in the present paper.
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Hansen, L. D., G. D. Kucera, J. S. Clemons, and J. Lee. "Aircraft Gas Turbine Engine Fuel Pumping Systems in the 21st Century." Journal of Engineering for Gas Turbines and Power 119, no. 3 (1997): 591–97. http://dx.doi.org/10.1115/1.2817025.
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Since their introduction, main engine fuel pumping systems for aircraft gas turbine engines have remained relatively unchanged. The main engine fuel pump has been an engine accessory gearbox driven, positive displacement pump (except for the Concorde), until recently when centrifugal pumps were introduced on Pratt-Whitney and General Electric military engines. This paper describes some of the issues that must be addressed as pumping system technology moves into the 21st century and gives a description of two programs that address these issues.
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Yando, Markus, Amiruddin Amiruddin, Bambang Wahyudi, and Ryan Pengestu N. "ANALYSIS OF THE MAIN GENERATOR DUAL FUEL DIESEL ELECTRIC (DFDE) 12V50DF SUDDEN TRIP." Dinasti International Journal of Digital Business Management 2, no. 4 (2021): 625–36. http://dx.doi.org/10.31933/dijdbm.v2i4.908.
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In the 20th century, the growth of marine transportation has grown rapidly in line with technological advances. Given that the marine transportation sector is one of the pollutants that exist today, the use of energy sources with better thermal efficiency and combustion that does not have a negative impact on the environment is needed in the modern era. In accordance with the regulations stipulated by IMO in the Marine Polution (Marpol) Annex VI Regulation 14 which regulates the prohibition of ships from using fuels with sulfur content higher than 0.5%. The need for alternative fuels in the shipping industry is an important thought to support the efficiency of the shipping industry. Liquid Natural Gas (LNG) is currently being developed by the government as a fuel for vehicles and environmentally friendly industries. In addition to its availability, natural gas is also considered effective for combustion. Methane / LNG gas is one of the most dominant alternative fuels at this time. This fuel can also save company expenses, namely reducing the cost of providing fuel for energy needs as a source of propulsion on board the ship. For the above, ships, especially LNG carriers, have used a lot of diesel engines to propel their ships using LNG fuel with the concept of the engine being Two Fuel Diesel Electric (DFDE) where the engine can use Marine Diesel Oil (MDO) and LNG. The DFDE engine drives the Generator and the Generator generates electricity to drive the Electric Motor and the Electric motor moves the propeller shaft, this DFDE engine in the future will replace conventional diesel engines because it is more cost efficient, but requires Engineers who understand DFDE engine technology.
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Yan, Wen Bing, Hong Xia Pan, and Shao Zhong Jiang. "Dynamic Properties of Engine Main Components." Advanced Materials Research 455-456 (January 2012): 1454–58. http://dx.doi.org/10.4028/scientific5/amr.455-456.1454.
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Yan, Wen Bing, Hong Xia Pan, and Shao Zhong Jiang. "Dynamic Properties of Engine Main Components." Advanced Materials Research 455-456 (January 2012): 1454–58. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.1454.
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Based on the combination of modal analysis technology and finite element method (FEM), the modal parameters identification of the main parts of a diesel engine (crankshaft ,connecting rod and oil pan) were tested using hammer beat method and calculated by means of I-DEAS software. The natural frequency and shake mode parameters of the parts were identified. The results could provide basis for structure dynamic analysis and control of noise of the diesel engine.
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Borkowski, Tadeusz, Przemysław Kowalak, and Jarosław Myśków. "VESSEL MAIN PROPULSION ENGINE PERFORMANCE EVALUATION." Journal of KONES. Powertrain and Transport 19, no. 2 (2015): 53–60. http://dx.doi.org/10.5604/12314005.1137890.
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Cikanek, H. "Space shuttle main engine failure detection." IEEE Control Systems Magazine 6, no. 3 (1986): 13–18. http://dx.doi.org/10.1109/mcs.1986.1105095.
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Nahovsky, D. A., and H. H. Doshchenko. "IMPROVING VESSEL’S MAIN ENGINE LUBRICATION ALGORITHM." Scientific Bulletin Kherson State Maritime Academy 1, no. 24 (2021): 106–16. https://doi.org/10.33815/2313-4763.2021.1.24.106-116.
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Duyar, A., T. H. Guo, and W. C. Merrill. "Space shuttle main engine model identification." IEEE Control Systems Magazine 10, no. 4 (1990): 59–65. http://dx.doi.org/10.1109/37.56279.
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Gębura, Andrzej, Andrzej Szelmanowski, Wojciech Zieliński, and Henryk Kowalczyk. "Analysis of single shaft turbojet engines structures and evaluation their safety with the use of FDM-A and FAM-C diagnostic methods." Journal of Konbin 54, no. 3 (2024): 99–120. http://dx.doi.org/10.5604/01.3001.0054.7683.
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The article reviews the main stages of development of single-shaft turbojet engines. Selected construction of these engines are presented divided into three periods (before, during and after World War II) and two main jet engine schemes were discussed (with a centrifugal compressor and an axial compressor). The SO-3 jet engine installed on the TS-11 “Spark” aircraft was chosen to present the method of assessing the safety of structures. The FDM-A diagnostic methods developed in AFIT were used to experimentally verify the technical condition of the engine and FAM-C, based on the analysis of disturbances in the instantaneous rotational speed of the engine shaft. The results of tests related to the assessment of engine shaft misalignment, the assessment of the degree of wear of the engine shaft bearings and the assessment of the shaft clamping force in the bearings are presented. The summary lists the main advantages of single-shaft turbojet engines (simplicity of design for a solution with a centrifugal compressor and high thrust enabling breaking the sound barrier) and their disadvantages (complex design for a solution with an axial compressor and high failure rate of shaft bearing supports as the most loaded engine component).
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Catana, Razvan Marius, Grigore Cican, and Gabriel-Petre Badea. "Thermodynamic Analysis and Performance Evaluation of Microjet Engines in Gas Turbine Education." Applied Sciences 14, no. 15 (2024): 6754. http://dx.doi.org/10.3390/app14156754.
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This paper presents a detailed study on the main parameters and performance evaluation of microjet engines, at take-off regime and at various engine working regimes, based on thermodynamic analysis of a particular engine data library, from different engine manufacturers such as JetCat and AMT Netherlands. The studied engines have the same spool design but different thrust classes ranging from 97 to 1569 N. The particular data library includes engine specifications from catalogs or data sheets as well as our own experimental data from the JetCat P80 microjet engine, obtained using the ET 796 Jet Turbine Module, a complete testing facility for gas turbine education purposes. Various ratios and differences between certain engine main parameters and performances are studied in order to calculate values through which the analyses can be performed. Even if the engines have different thrust classes, the study examines if there are close values of the ratios and differences of parameters, that can be defined as reference parameters through which the engine performance can be compared and evaluated.
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Chen, Liang, Dongxin Xue, Xigeng Song, Zhaoqi He, and Dongjie Huang. "A Study on Anti-Shock Performance of Marine Diesel Engine Based on Multi-Body Dynamics and Elastohydrodynamic Lubrication." Applied Sciences 11, no. 23 (2021): 11259. http://dx.doi.org/10.3390/app112311259.
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Diesel engine anti-shock performance is important for navy ships. The calculation method is a fast and economic way compared to underwater explosion trial in this field. Researchers of diesel engine anti-shock performance mainly use the spring damping model to simulate the main bearings of a diesel engine. The elastohydrodynamic lubrication method has been continuously used in the main bearings of diesel engines in normal working conditions. This research aims at using the elastohydrodynamic lubrication method in the main bearings of the diesel engine in external shock conditions. The main bearing elastohydrodynamic lubrication and diesel engine multi-body dynamics analysis is based on AVL EXCITE Power Unite software. The external shock is equivalent to the interference on the elastohydrodynamic lubrication calculation. Whether the elastohydrodynamic lubrication algorithm can complete the calculation under interference is the key to the study. By adopting a very small calculation step size, a high number of iterations, and increasing the stiffness of the thrust bearing, the elastohydrodynamic lubrication algorithm can be successfully completed under the external impact environment. The calculation results of the accelerations on engine block feet have a similar trend as the experiment results. Diesel engines with and without shock absorbers in external shock conditions are calculated. This calculation model can also be used for diesel engine dynamics calculations and main bearing lubrication calculations under normal working conditions.
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Zhao, Jingmin, Wenjun Bu, Liang Shi, and Zechao Hu. "Stability Design of Air Vibration Isolation Device for a High Power Density Main Engine." Symmetry 13, no. 7 (2021): 1244. http://dx.doi.org/10.3390/sym13071244.
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In order to improve the alignment stability of the air vibration isolation device of a high-powered main engine, we established a mechanical model for the air vibration isolation system and analyzed the alignment deviation of the device and the vibration decoupling conditions of the system. Additionally, an optimized design method for the dual-direction support of the air vibration isolators positioned symmetrically on the main engine was proposed. The resultant design showed that when compared to the conventional inclined support of air springs for the main engines onboard ships, the dual-direction support design proposed in this paper for air vibration isolation could eliminate the adverse effect of the output torque reaction on the alignment of the main engine and decouple the system to reduce the number of peaks in the frequency response of vertical force transmission. The optimized design could effectively improve the alignment performance of the device for tilted or swinging operating conditions and maintain the good alignment stability of the device when a single vertical support air spring fails. A single vertical support air spring failure mainly affects the stability of the main engine under the reaction of the output torque, especially the air springs arranged in the corner, while the air springs arranged in the middle have no effect. The optimized design could also improve the vibration isolation performance. This is important for the design of air spring vibration isolation devices for high power density main engines.
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BUCZEK, Konrad, and Sven LAUER. "Firing order selection for a V20 commercial diesel engine with FEV Virtual Engine." Combustion Engines 169, no. 2 (2017): 64–70. http://dx.doi.org/10.19206/ce-2017-211.
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The continuously increasing mechanical and thermal loads of modern engines require optimization of the designs with incorporation of a wide range of different aspects. Application of advanced computer simulations in the development process for most engine components is well established, leading to the creation of well optimized products. However, the optimization of such design variables ike the firing order, which influences engine operation in several disciplines, is still challenging. Considering the ever increasing peak firing pressure requirements, the layout of the firing order in multi-cylinder commercial engines is an efficient way to reduce crank train / overall engine vibration and main bearing loads, whilst controlling engine balancing and preserving adequate gas exchange dynamics. The proposed general firing order selection process for four-stroke engines and, in particular, its first part being the optimization of the firing order based on crank train torsional vibration, is the main topic of this paper. The exemplary study for a V20 high speed commercial Diesel engine regarding the influence of the firing sequence on crank train torsional vibration has been conducted with the multibody dynamics simulation software “FEV Virtual Engine”. It addresses various engine crankshaft layouts and engine applications.
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Slyn’ko, Georgiy, Volodymyr Korohodskyi, Olexandr Kushnir, Roman Sukhonos, and Vira Slynko. "RESEARCH ON THE INFLUENCE OF THE ANGLE BETWEEN THE CRANKPINS ON THE MARGIN OF SAFETY OF THE PARTIALLY SUPPORTED CRANKSHAFT OF A FLAT-TWIN ENGINE." New Materials and Technologies in Metallurgy and Mechanical Engineering, no. 1 (March 31, 2025): 57–66. https://doi.org/10.15588/1607-6885-2025-1-8.
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Purpose. The purpose of the study is to reduce the loads acting on the elements of the partially supported crankshaft of a flat-twin internal combustion engine by choosing the optimal value of the angle between the crankpins. This will make it possible to increase the margin of safety of the crankshaft. Research methods. Theoretical (transition from specific to abstract), empirical (observation, measurement, comparison) and complex (abstraction, modeling, analysis and synthesis) research methods are used. The computer program Engine Calculation and Microsoft Office was used for the study. The object of the study is a four-stroke two-cylinder flat-twin gasoline motorcycle engine MT-10-36. The subject of the study is the influence of the angle between the crankpins γк of the partially supported crankshaft on the margin of safety of a crankshaft of flat-twin engine. Results. The current issue of increasing the reliability of a flat-twin gasoline internal combustion engine with a different angle between the crankshaft crankpins γк has been resolved. The forces acting on the connecting rod and main bearings of the crankshaft of the basic engine MT-10-36 and engines with a changed angle γк (5 variants) have been calculated. The impact moments on all main and connecting rod bearings of the crankshaft have been calculated for engines with different angles γк. The calculated numerical values of the safety margins of the crankshaft parts allow us to state that engines with angles γк = 210 °, γк = 240 ° or γк = 270 ° have improved reliability (in comparison with the basic engine). Scientific novelty. The known method of calculating the forces acting on the main bearings of internal combustion engines has been modified for flat-twin engines that do not have an intermediate (middle) main bearing. For the first time, load diagrams on the main bearings have been obtained for a partially supported crankshaft of flat-twin internal combustion engine with angles between crankpins γк = 210 °, γк = 240 °, γк = 270 °. For the first time, graphs of the impact moments on the connecting rods and main bearings have been obtained for a partially supported crankshaft of flat-twin engine MT-10-36 with cranks offset by γк = 210 °, γк = 240 °, γк = 270 °. Practical value. The method for determining the influence of the angle between the cranks of a partially supported crankshaft of a flat-twin internal combustion engine on the safety margin of the engine’s crankshaft can be used in the design of new flat-twin and V-twin internal combustion engines for various purposes.
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DAHOU, Gédéon Marlein, David G. F. ADAMON, and Tognon Clotilde GUIDI. "Prospective Study of the Main Internal Combustion Engines Running on Hydrogen: State of the Art." International Journal of Research and Review 11, no. 4 (2024): 231–50. http://dx.doi.org/10.52403/ijrr.20240426.
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Several studies have revealed the high GHG emissions of the road sector compared with other sectors. One alternative is to replace fossil fuels with others that are less harmful to the environment. Hydrogen is positioned as an adaptable solution for existing engines, especially internal combustion engines. This article presents an analysis of internal combustion engines and the different fuels used to date. In addition, the properties of hydrogen, and the current state of research into the use of hydrogen in internal combustion engines, are discussed. After a presentation of the properties of hydrogen, it goes on to describe the hydrogen combustion process, the possible anomalies caused by its properties, and a few possible modifications for adapting an internal-combustion engine to hydrogen, initially using either gasoline or diesel. Keywords: Hydrogen - Engine design - Combustion - Sustainable development - Vehicle
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Sun, Yijia. "Comparative study on the performance of traditional engines and hybrid engines." Theoretical and Natural Science 5, no. 1 (2023): 649–57. http://dx.doi.org/10.54254/2753-8818/5/20230424.
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Engines are very important for human-beings and it is necessary for people to find a perfect kind of engines since they are used in many vehicles. In this paper, it will mainly focus the traditional engines and the hybrid engines, and compare there main performances including economical performance and environmental performance. For economical performance, researches have found that hybrid engine has higher thermal efficiency and lower thermal efficiency loss compared with traditional engine because hybrid engine does not have the inherent defect of crankshaft linkage mechanism as traditional engine. Also, since hybrid engine is consist of both electric motor and internal combustion engine, consequently it will have lower fuel cost. For environmental performance, hybrid engine not only reduce the consumption of non-renewable fuel but also more environmental since using electric to give vehicles power is relative environmental than using fuels only like traditional engine. This paper also find that both traditional engine and hybrid engine have development prospects in the transportation industry.
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Khoir, Kana Taufiq, Muh Anis Mustaghfirin, and Munir Muradi. "Cooling Design Analysis of The Use of Land Engine On Ship." IOP Conference Series: Earth and Environmental Science 1265, no. 1 (2023): 012022. http://dx.doi.org/10.1088/1755-1315/1265/1/012022.
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Abstract Based on the survey, the majority of fishermen in Indonesia choose to use land engines as propulsion for the main engine and auxiliary engine on ships because in terms of the price of land engines, they are much cheaper than ship engines produced by marine engine factories. Therefore, not a few workshops that often serve land engine modifications for further use as ship propulsion. Regulations regarding the use of land engines as ship’s main engines in Indonesia are currently not widely regulated in the Classification Agency regulations. Heat exchanger that supports the cooling system for optimal use of land engines on ships. Furthermore, the heat exchanger design process with a heat transfer load of 17,416 Watt was carried out using the LMTD method and obtained a heat transfer area value of 1,204 m2 with a staggered arrangement configuration. From the results of the CFD simulation, the temperature value at the hot water outlet is 51.39 C.
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Liu, Ruichao, Xianghui Meng, and Yi Cui. "Influence of numerous start-ups and stops on tribological performance evolution of engine main bearings." International Journal of Engine Research 21, no. 8 (2018): 1362–80. http://dx.doi.org/10.1177/1468087418810094.
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For main bearings of internal combustion engines, most of the wear occurs during the start-ups and stops. The popularity of the start–stop system in automobile engines, which is used to save fuel consumption during idling stage, makes the working condition of main bearings severer because more frequent starts and stops will be generated. Changes in the bearing surface caused by wear will directly affect the bearing’s working performance. So in this study a transient mixed lubrication model and a wear model are coupled to analyze the influence of numerous start-ups and stops on the tribological performance evolution of engine main bearings. Starved lubrication of bearings before the oil supply is considered. The wear process is studied on the scale of surface topography and geometry. A main bearing in a four-stroke four-cylinder gasoline engine is studied under engine start–stop cycle conditions. The effects of temperature and lubricant grade on the transient tribodynamic behavior during the start-ups and stops are first investigated. Then the evolutions of surface characteristics and tribological performance of main bearings after numerous engine start-ups and stops are simulated. Results show that the temperature and lubricant grade can significantly affect the friction and wear of bearings. Hot start–stop condition leads to more serious asperity contact friction in the early stage of start-up, while cold start–stop condition generates more friction loss. The wear process of bearing surface is faster when applying oil with lower viscosity. And the impacts of engine start-ups and stops on bearing working performance are mainly seen in contact friction.
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Krasnov, V. M., and N. D. Stepin. "Monitoring engine oil performance effectiveness to assess the engines conditions." Trudy NAMI, no. 1 (March 24, 2022): 91–96. http://dx.doi.org/10.51187/0135-3152-2022-1-91-96.
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Introduction (statement of the problem and relevance). The article is devoted to the study of engine oil in the course of numerous engine and automotive tests; therefore it is of an overview nature and considers general issues of assessing engine wear based on the engine oil condition. The article discusses the operating modes of the oil in the engine, its physical and chemical parameters, and the additives effect on the preservation of these indicators, as well as the issues of engines and oils conditions monitoring.The objectives of the study included the determination of the influence of the main engine oil indicators on the engine operation followed by the monitoring peculiarities of the engine condition.The purpose of the study was to consider general issues of assessing engine wear depending on the engine oil condition.Methodology and research methods. The analytical method of research was applied.Results. The main indicators of engine oil and the factors influencing their change have been considered. The criteria to help the assessment of the engine oil condition when conducting physical and chemical analyzes were determined. A group of indicators necessary to monitor and analyze the causes of engine wear was established. The main peculiarities of the engine oil state monitoring were considered and the monitoring began at the early stages of engine, oil and other fluids development.Practical significance. Engine oil is a carrier of information that can be used to improve the reliability of internal combustion engines and extend their life. Like a blood test, thanks to which it is possible to draw conclusions about the correct functioning of the human body, physical and chemical studies of engine oil allow us to assess the correct operation of an individual engine components, identify malfunctions and prevent breakdowns, extending the life of the engine.
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Pokusaev, Mikhail Nikolaevich, Alexei Viktorovich Trifonov, and Elena Georgievna Ilyina. "Expected economic effect after installing variator for main engine cooling system pump." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, no. 4 (2020): 87–94. http://dx.doi.org/10.24143/2073-1574-2020-4-87-94.
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The article describes the process of increasing power efficiency of the ship’s main engines along with reducing power losses on the drive of auxiliary mechanisms. The most common ship cooling systems with two circuits of fresh water and seawater have a disadvantage: the power consumed by the external circuit pump drive does not change when the temperature of the cooling seawater changes. The amount of energy taken from the effective power of the engine by the pump is significant. The technical solution proposed allows to regulate the speed of the mounted pump and to reduce fuel consumption. The chart of the variator in the seawater pump drive of the engine 8ChSP13/14 has been shown. The variator with automatic control is installed between the pump and the engine power take-off shaft, which helps to regulate the speed of the impeller for normal engine cooling. The maximal effect of the proposed modernization can be obtained under the vessel's operation with the seawater temperature below the calculated one. The description of the experimental stand developed in the laboratory of Astrakhan State Technical University, which is simulating the cooling system of the marine engine 8ChSP13 / 14, has been given. The graph of the change in torque versus time is illustrated at the impeller speed of 1 800 rpm. It has been stated that the mechanical characteristics of the pump for different operating modes obtained as a result of experimental studies allow to assess the economic effect from reducing fuel consumption. The results of economic design of installing a variable speed drive in the cooling system of a marine engine are presented as a case study of the vessel Moscow-169 (Astrakhan passenger motor ship).
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Le-Dinh, Tuan, and Hai Tran. "Vibration analysis of shaft generator driven from main engine." Journal of Physics: Conference Series 2949, no. 1 (2025): 012055. https://doi.org/10.1088/1742-6596/2949/1/012055.
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Abstract In recent years, offshore service vessels have increasingly used hybrid propulsion systems with generators mounted coaxially with the main engine. These latest state-of-the-art shaft generators enable ship operators and builders to benefit from efficiency, performance, and reliability. By reducing a ship’s CO2 emissions, it also helps ships meet the International Maritime Organization’s (IMO) EEDI (Energy Efficiency Design Index) measure targeting new ship designs and construction to ensure energy-efficient standards and EEXI (Existing Ship Energy Efficiency Index) measure addressing existing ships and promotes retrofits and optimizations. The paper presents the vibration analysis of Power Take Off generators (PTO) driven by engine-driven reduction gear. This analysis relates measurements of vibration carried out at 90% and 100% rated generator speed with unloaded generator and ship service speed under steady state operation. First, the study introduced experimental measurement on the same type of PTO generator installed on different ships with the same or different main engines. Second, based on this experimental measurement, the vibration analyses are evaluated and compared to relevant criteria and standards. The research results of the vibration analysis and the comparison with the criteria required on these in-shaft generators driven from the main engine were used as results of the quality assessment of the installation of hybrid propulsion systems for recent new building ships in Vietnam. This was verified by the results of vibration measurement, analysis and evaluation on shaft generators installed on three recent new-building ships.
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Mihai, Victor, Liliana Rusu, and Adrian Presura. "Ventilation of engine rooms in diesel engines ships." Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XI, Construcţii navale/ Annals of "Dunărea de Jos" of Galati, Fascicle XI, Shipbuilding 43 (November 15, 2020): 69–78. http://dx.doi.org/10.35219/annugalshipbuilding.2020.43.09.
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"Engines room are equipped with a ventilation system which should provide fresh air for combustion and for removing the heat radiated by main engines, auxiliary engines, boilers, generators and other hot equipment installed in compartment. The paper presents the main requirements, recommendations and challenges regarding designing and construction of the ventilation system. The principal design aspects highlighted in this material are related to reducing the pressure drop across the distribution system to reduce the energy used by the fan to blow the air inside the room and to identify the best arrangement of air distribution inlet/outlet in order to get high efficiency of the cooling air."
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Mohebbi, Mostafa, Azhar Abdul Aziz, Vahid Hosseini, Mostafa Ramzannezhad, and Rouzbeh Shafaghat. "Evaluation of the main operating parameters of a homogeneous charge compression ignition engine for performance optimization." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, no. 8 (2016): 1001–21. http://dx.doi.org/10.1177/0954407016667891.
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Homogeneous charge compression ignition engines require a smart control system to regulate the input quantities of the engine in various operational conditions. Achieving an optimum combustion needs an appropriate system response for different engine loads and speeds according to the power acquired from the engine, as well as the amounts of emissions present in the exhaust. Therefore, performing a set of experimental tests together with numerical simulations in a wide range of conditions facilitates calibration of the input parameters of the engine. In this study, the effects of the thermodynamic parameters and the thermokinetic parameters on the engine output in the preliminary design stage were obtained at different speeds to determine the optimum exhaust emissions, the optimum combustion timing and the ranges of misfiring and knock, using multiple-zone thermodynamic modelling. On the assumption that the simulation cycle is closed, the probability density function was used to determine the initial conditions for the temperature and the residual gas from the previous cycle mass distribution in each area inside the cylinder. The results obtained proved that the kinetic properties of the mixture due to the effects of the the air-to-fuel ratio, the percentage of exhaust gas recirculation and the percentage of reformer gas have dominant effects on the output in comparison with the thermodynamic parameters such as the intake pressure and the intake temperature. At low speeds, exhaust gas recirculation retards combustion and delays engine knock. At higher engine speeds, the reformer gas advances combustion and improves misfiring.
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Doric, Jovan, and Ivan Klinar. "Efficiency characteristics of a new quasi-constant volume combustion spark ignition engine." Thermal Science 17, no. 1 (2013): 119–33. http://dx.doi.org/10.2298/tsci120530158d.
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A zero dimensional model has been used to investigate the combustion performance of a four cylinder petrol engine with unconventional piston motion. The main feature of this new spark ignition (SI) engine concept is the realization of quasi-constant volume (QCV) during combustion process. Presented mechanism is designed to obtain a specific motion law which provides better fuel consumption of internal combustion (IC) engines. These advantages over standard engine are achieved through synthesis of unconventional piston mechanism. The numerical calculation was performed for several cases of different piston mechanism parameters, compression ratio and engine speed. Calculated efficiency and power diagrams are plotted and compared with performance of ordinary SI engine. The results show that combustion during quasi-constant volume has significant impact on improvement of efficiency. The main aim of this paper is to find a proper kinematics parameter of unconventional piston mechanism for most efficient heat addition in SI engines.
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Tjahjono, Agus, Tri Cahyadi, Kristin Anita Indriyani, and Ilham Maulana. "Identify The Cause and Effect of Detonation In The Main Engine." RSF Conference Series: Engineering and Technology 3, no. 1 (2023): 145–52. http://dx.doi.org/10.31098/cset.v3i1.756.
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In the process of shipping, the main engine must always be maintained in prime condition to support the smooth sailing of a ship. In the main engine, there are often oddities or things that are not common in the main engine, one of which is knocking. The purpose of this study is to identify detonation that occurs in the main engine, analyze the causes and consequences of detonation. The research method used in this research is qualitative. Sources of research data obtained from data collection techniques through observation, interviews, documentation, and data validity techniques using internal validity. The place and time of the research were conducted at MV. Tanto Hemat for one year. SWOT method to analyze various factors that can be used to optimize blasting systematically against strengths, weaknesses, opportunities, and threats. The study results identify detonation in the main engine, namely ignition delay and pre-ignition in the main engine. Factors that cause detonation in the main engine are poor fuel quality, high pressure and temperature in the engine combustion chamber, and improper combustion timing. The impact caused by detonation on the main engine is detonation will cause an increase in fuel consumption, damage to engine spare parts, and carbon buildup in the combustion chamber.
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Sharatov, A. S., and A. R. Garafutdinov. "Comparison of propeller load curve of the main low-speed engines based on the results of modeling and trial tests." Transactions of the Krylov State Research Centre S-I, no. 1 (2021): 147–49. http://dx.doi.org/10.24937/2542-2324-2021-1-s-i-147-149.
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Under operating conditions, the main engine and the fixed pitch propeller are interdependent, and their parameters are interrelated. Main low-speed engines, as a rule, have significant cylinder power and are used on vessels characterized by significant coefficients of the hull volumetric completeness. With the stationarity of the operating factors, the vessel's speed is directly proportional to the propeller rotational speed. Thus we can talk about the self-similarity of the hull resistance characteristics and the propeller resistance moment. Analysis of the results of operational tests of heavy-tonnage vessels showed the deviation of the parabola coefficient of the propeller characteristic from the characteristic values. An increase in the error in assessing and predicting the heat load of an engine operating according to propeller characteristics can contribute to a decrease in the reliability of the main power plant. In the article, based on the operational test data, the indicators of interaction between the main engine, the vessel's hull and the propeller are analyzed in terms of the parameters of the equations of propeller and running characteristics. To verify the data, a mathematical model of the TRANSAS Engine Room System simulator was used. Based on the data obtained, it was agreed that adjustments of the mathematical description of the propeller characteristics should be made during the preparation of the vessel acceptance tests and the engines heat load control during operation.
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Ambrozik, Andrzej, Tomasz Ambrozik, Dariusz Kurczyński, and Piotr Łagowski. "Comparative Assessment of CI Engine Response." Transport and Communications 2, no. 1 (2014): 1–4. http://dx.doi.org/10.26552/tac.c.2014.1.1.
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The response of the piston internal combustion engine provides an important indicator to assess the engine ability to adapt to constantly varying load conditions in its operation. It is the main criterion by which engines powering automotive vehicles are evaluated. It also affects road safety. The engine response depends on the profile of the curve that shows changes in the engine torque as a function of the crankshaft rotational speed. The paper presents a comparison of CI engines representing different generations with respect to constructional level. The engines that underwent comparison were equipped with the fuel system with a rotary injection pump and with Common Rail fuel system.
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Brzeski, L., and Z. Kazimierski. "A New Concept of Externally Heated Engine—Comparisons with the Stirling Engine." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 210, no. 5 (1996): 363–71. http://dx.doi.org/10.1243/pime_proc_1996_210_060_02.
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This paper presents a new concept of the externally heated valve (EHV) engine. Air can be used as a working medium in the closed cycle of this engine. Heat delivered to the working air can come from a combustion chamber or another heat generator of an arbitrary type. The engine construction and the thermodynamic cycle performed by it are original and entirely different from the well-known Stirling engine. The main disadvantage of the Stirling engine is its low power density, that is the low power obtained per litre of the engine cylinder volume. In the case of the engine presented here it is possible to achieve power density and efficiency similar to those typical of advanced internal combustion engines. Comparisons between the power of the Stirling engine and the power of the new engine have been performed for the same engine capacity, rotational frequency and maximum and minimum temperatures of the cycle. At the same minimum pressure of the working gas in both engines, the power of the EHV engine is several times higher than that of the Stirling engine, while, on the other hand, at the same maximum pressure of the working gas in both engines, the power of the EHV engine is 20 per cent higher than that of the Stirling engine power. The efficiencies of both engines do not differ significantly from each other.
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Alrwashdeh, Saad S. "Investigation of the effect of the injection pressure on the direct-ignition diesel engine performance." AIMS Energy 10, no. 2 (2022): 340–55. http://dx.doi.org/10.3934/energy.2022018.
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<abstract> <p>Internal combustion engines (ICE) play a major role in converting the energy with its different types in order to benefit from it for various applications such as transportation, energy generation, and many others applications. Internal combustion engines use two main types of operation cycles, namely the Otto and Diesel cycles. Many development processes are carried out to improve the efficiency of the ICE nowadays such as working on the design of the combustion engine and the material selections and others. One of the main parameters which play an important role in improving the diesel engine is the fuel pressure. By increasing the fuel pressure injected into the engine, the efficiency, in consequence, will increase. This work investigates the injection pressure of the fuel (Diesel) and studies the effect of these changes on engine efficiency. It was found that the increase in injection pressure significantly affected the improvement in engine performance. Such improved engine subsystems will have a great impact on the energy extracted and used for various engineering applications.</p> </abstract>
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Ke, Zhenying, Yang Xu, and Zihao Guo. "Analysis of the social impact of heat engine and its future application." IOP Conference Series: Earth and Environmental Science 1011, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1755-1315/1011/1/012007.
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Abstract This paper aims to evaluate the social impact of the heat engine and analyze the application of heat engines in the future. This paper starts with some background information on heat engines and the challenges of gas pollution and gas shortage. The concepts of efficiency and environmental friendliness of the heat engine are widely discussed, which speeds up the development of several kinds of heat engines. We discuss the application of heat engines in different industries from three main aspects: agriculture, marine engine, and aviation. They improve our daily life and provide the required energy to the community. Thermoacoustic Heat Engine (TAHE), Liquid Air Cycle Engines (LACE), and a new class of Heat engine without the expulsion of reaction mass are introduced in this paper. Furthermore, the article will cover some futures. One is artificial intelligence, and another one is about biofuel, which helps heat engines to have higher efficiency and less pollution, and also how heat engines are involved in the next decade.
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Fathallah, Aguk Zuhdi Muhammad, and Fransico Pinto. "The Influence of NaCl dissolved on biodiesel of used cooking oil on performance and its degradation of main components of diesel engine." IOP Conference Series: Earth and Environmental Science 972, no. 1 (2022): 012030. http://dx.doi.org/10.1088/1755-1315/972/1/012030.
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Abstract Biodiesel has been developed both domestically and abroad. Various studies have been conducted to determine the feasibility and capability of raw materials used cooking oil is replacing diesel oil in the future. The salt content in the raw material for biodiesel (new cooking oil and used cooking oil) could have a negative impact or even do not have a significant effect on the rate of wear of metal on the main components of the diesel engine. Through durability tests, the effect of salt (NaCl) on the main components of diesel engines has been tested. The new cooking oil biodiesel is used as a reference in examining the damage level of the main components of diesel engines. Results of the experiments showed that there is a difference between the use of biodiesel fuel from used cooking oil with new cooking oil such as lower diesel engine performance, carbon deposits generated higher, and degradation of metal elements on the main component in the diesel engine lubricating oil is higher
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Itoh, Masanori, Shinichi Saitoh, Tatsuo Arie, and Kenji Horiguchi. "Main Engine Coolant Temperature Control System Simulator." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 20, no. 3 (1985): 229–34. http://dx.doi.org/10.5988/jime1966.20.229.
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Taniuchi, Takeshi, Hiroshi Nakajima, and Yoshiyuki Kita. "New control Method of Marine Main Engine." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 25, no. 3 (1990): 219–24. http://dx.doi.org/10.5988/jime1966.25.219.
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