Journal articles: 'Intake manifold'

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Hung, Le Viet, Do Van Dung, Anh Thi Nguyen, and Luong Huynh Giang. "Performance Characteristics of Small Diesel DI Engine Using Different Geometry Intake Parts." Applied Mechanics and Materials 894 (September 2019): 72–81. http://dx.doi.org/10.4028/www.scientific.net/amm.894.72.

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This paper presents a study on improvement of performance characteristics of small diesel direct injection engine with power of 16.5HP using the re-design of intake manifold. With help of simulation tools like AVL BOOST, the proposed measures for improvement of intake manifold were analyzed. The simulation results indicated that two best intake manifolds were recommended for experimental purposes. These manifolds were experimentally used to benchmark to the current intake manifold of engine. In experiments, the important performance characteristics of engine (like volumetric efficiency, brake power, brake torque, fuel consumption, NOx, Soot, and CO) were analyzed. Moreover, the flow pattern of intake air was experimentally observed using a transparent cylinder.

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Miyano, T., and M. Hubbard. "Internal Combustion Engine Intake-Manifold Aspiration Dynamics." Journal of Dynamic Systems, Measurement, and Control 112, no. 4 (December 1, 1990): 596–603. http://dx.doi.org/10.1115/1.2896184.

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A model is developed for simulating and predicting the dynamics of intake-manifolds for automotive internal combustion engines. A thermodynamic control volume approach and bond graphs are used to derive mass and energy conservation equations. Simulation outputs include time histories of pressure, temperature, mass flow, energy flow, heat flow and overall volumetric efficiency. Cylinder pressure when the intake valve closes is intensively examined because it determines the volumetric efficiency. Increases in volumetric efficiency result from increases in pressure caused by dynamic effects. Volumetric efficiency versus rpm is used to evaluate the dynamic effects of certain intake-manifold configurations. Major design parameters are the length of the intake manifold pipe, diameter of the intake manifold pipe and length of the pipe upstream of the throttle valve. Changing manifold parameters can yield improvements in volumetric efficiency at certain engine speeds but can also cause deterioration at other speeds. Shortening the length of the upstream pipe moves the volumetric efficiency peaks to higher engine speeds.

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RESLER, E. L. "INTAKE MANIFOLD PRESTRATIFIED CHARGE." Chemical Engineering Communications 67, no. 1 (May 1988): 111–27. http://dx.doi.org/10.1080/00986448808940380.

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Pahmi, Muhammad Arif Abdul Hamid, Sharzali Che Mat, Ahmad Nazri Nasruddin, Mohd Fauzi Ismail, and Mohd Najib Yusof. "The Analysis of Intake Manifold Air Stream Velocity on Different Material Roughness." Applied Mechanics and Materials 661 (October 2014): 143–47. http://dx.doi.org/10.4028/www.scientific.net/amm.661.143.

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Intake manifold is a crucial part in an engine that acts as a medium for air flow to mix with the fuel before entering the combustion chamber. For years, cast iron and aluminium were the primary materials chosen for fabrication of an intake manifold before plastic based material was introduced to the field. However, there is lack of research involving the usage of plastic as the intake manifold material. In this paper, the effects of internal surface roughness variations (Cast iron, aluminium and plastic) inside the intake manifold were studied. Three dimensional, intake manifold model was developed to simulate the airflow. The study emphasized on the airflow velocity inside the intake manifold. The study showed that the surface roughness influenced the air flow velocity near the intake manifold outlet. The plastic based intake manifold exhibited the highest air stream velocity (near the intake manifold outlet) at 477.770 m/s. This value is 0.60% and 0.40% higher than those produced by the cast iron and aluminium intake manifold, respectively.

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Zhang, Xiang Hong, Shi Qiang Zhang, and Zhong Yi Han. "Optimum Gate Design of the Injection Mold on Plastic Air Intake Manifold of Engine Based on CAE Technique." Advanced Materials Research 295-297 (July 2011): 345–48. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.345.

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For plastic air intake manifold, the warpage is difficult to solve. By simulating injection process with Moldflow, researched warpage, air traps, weld lines of intake manifold. Analytic result showed four gates are better to Xiali 4GB plastic air intake manifold, and obtained the best gate’s location. Summarized some important experience on designing injection mould of plastic air intake manifold. Made out very instructive work to succeed to design injection mould of plastic air intake manifold.

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Dima, Alexandru, Alexandru Oprica, Ana Maria Nicu, Diana Camelia Staicu, and Ilie Dumitru. "Simulation of Air in the Intake Manifold Flap of an Internal Combustion Engine." Applied Mechanics and Materials 880 (March 2018): 189–94. http://dx.doi.org/10.4028/www.scientific.net/amm.880.189.

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The objective of this study is to analyze and predict the flow through the intake manifold using a computational fluid dynamics program (CFD). The performance of internal combustion engine depends of the intake manifold and its components. Three model of the intake manifold flap was created and analyzed by using the commercially available ANSYS software. The volumetric efficiency which affects the engine power and torque is affected by the flow of air in the intake manifold. These paper reviews the work realized by various researchers in the field of variable intake manifold. The CFD plots offers valuable information’s of the flow field and tension distribution in the various part of intake manifold flap mechanism. The results show that the CFD model can be used as a tool for improve and optimize various part of the intake manifold flap.

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Wiranegara, Haruman. "PEMODELAN 3D INTAKE MANIFOLD BERBASIS FITUR." Metal Indonesia 38, no. 1 (March 30, 2017): 26. http://dx.doi.org/10.32423/jmi.2016.v38.26-30.

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Salah satu upaya untuk untuk menemukan kembali teknologi pembuatan suatu komponen otomotif dari impor adalah dengan melakukan rekayasa peniruan (reverse engineering). Pada penelitian ini telah dilakukan salah satu tahap penting dalam rekayasa peniruan yaitu pemodelan 3D intake manifold. Tujuan penelitian ini adalah menemukan geometrik dan dimensi yang tepat melalui proses pengukuran dan penggunaan fitur yang tepat dalam pemodelan 3D intake manifold. Langkah-langkah yang dilakukan adalah mempelajari fungsi komponen, mempelajari proses manufaktur, mempelajari fitur-fitur yang digunakan pada komponen intake manifold, melakukan pengukuran dengan pemindai 3D dan alat ukur manual, melakukan pemodelan 3D, melakukan pengecekan menyeluruh semua fitur. Hasil menunjukan bahwa semua geometrik dan dimensi intake manifold dapat diidentifikasi dan terbentuk model 3D intake manifold.

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Wang, Cai Yun, Zhi Xia He, Qian Wang, Guo Jun Zhang, and Shuo Wang. "Internal Flow Field Analysis of Engine Intake Manifold Based on RE and CFD." Advanced Materials Research 1079-1080 (December 2014): 930–34. http://dx.doi.org/10.4028/www.scientific.net/amr.1079-1080.930.

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The performance of the engine air intake system directly affect the working performance and fuel consumption, where the intake manifold design is the key.In this paper aimed at L91 Engine intake manifold ,firstly theRE(Reverse Engineering)technology was usedto rebuild the3d model of intake manifold.And then the internal flow zoneof the intake manifoldwas meshedin the pre-processing software ICEMand the internal flow fieldwas analyzedin the softwareof Fluent.The numerical model was verified by comparing the simulated and measured results. And then based on the numerical analysis of the internal flow characteristics of the intake manifold, the structure of variable-length intake manifold was come up with and finally was numerically proved to be better than the normal one.

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Galambos, Stjepan, Nebojsa Nikolic, Dragan Ruzic, and Jovan Doric. "An approach to computational fluid dynamic air-flow simulation in the internal combustion engine intake manifold." Thermal Science 24, no. 1 Part A (2020): 127–36. http://dx.doi.org/10.2298/tsci180707063g.

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The subject of this paper is modeling of an intake manifold of a four-stroke IC engine using contemporary software tools. Virtual 3D CAD model of an intake manifold was designed based on a real intake manifold of a four-stroke IC engine. Based on the CAD model a 3D CFD model of the intake manifold was created. The modeling has been done with the purpose of simulation of the air flow inside the intake manifold in order to monitor values of the internal pressure during several seconds of the engine operation in three different operating points. Also, an experiment was conducted, which included measurements of intake manifold pressure in the same engine operating points in the course of a time interval of approximately the same duration. The results of both the simulation and the experimental measurements have been shown in the paper proving that the created model was good enough for the intended purpose.

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Birtok-Baneasa, Corneliu, Adina Budiul-Berghian, Virginia Ana Socalici, and Robert Bucevschi. "Simulation of Thermal Transfer Through the Polyamide Intake Manifold." Materiale Plastice 56, no. 1 (March 30, 2019): 190–93. http://dx.doi.org/10.37358/mp.19.1.5149.

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The aim of the present study is to model the steady heat transfer of the engine polyamide intake manifold. Under the condition of a steady flow, the intake manifold wall temperature and the intake air temperature were measured to examine the effect of the thermal boundary layer on the heat transfer. Experimental data is used to generate the numerical model of airflow simulation through the intake manifold.

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11

Zhao, Fu Guo. "A Review of Research about Variable Intake Manifold." Advanced Materials Research 228-229 (April 2011): 299–302. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.299.

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This paper is an overview of research about variable intake manifold in the past 12 years. First, a brief introduction to the basic principle of the variable intake is given.Then, the research of variable intake manifold in these years is presented and discussed, and the important studies are described in detail. Finally, the paper gives a summary of the research status and prospects of variable intake manifold.

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Czyż, Zbigniew, Ksenia Siadkowska, and Rafał Sochaczewski. "CFD Analysis of Charge Exchange in an Aircraft Opposed-Piston Diesel Engine." MATEC Web of Conferences 252 (2019): 04002. http://dx.doi.org/10.1051/matecconf/201925204002.

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The paper presents a description of geometric models, computational algorithms, and results of numerical analysis of charge exchange in an opposed-piston two-stroke engine. The research engine is a newly designed internal diesel engine. This unit is composed of three cylinders in which operate three pairs of opposed-pistons. The engine generates a power output equal to 100 kW at a crankshaft rotation speed of 3800-4000 rpm. The numerical investigations were carried out using ANSYS FLUENT solver. The geometrical model includes an intake manifold, a cylinder and an outlet manifold. The study was conducted for a series of modifications of manifolds and intake and exhaust ports to optimise the charge exchange process in the engine. In addition, we attempted to verify the effect of the combustion chamber shape on the charge exchange process in the engine. The calculations specified a swirl coefficient obtained under steady conditions for fully open intake and exhaust ports as well as the CA value of 280° for all cylinders. In addition, mass flow rates were identified separately in all of the intake and exhaust ports to achieve the best possible uniformity of flow in particular cylinders. The paper includes comparative analyses of all of the intake and exhaust manifolds of the designed engine.

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13

Mukawa, T. "Development of a plastic intake manifold." JSAE Review 17, no. 1 (January 1996): 51–57. http://dx.doi.org/10.1016/0389-4304(95)00048-8.

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14

Dittrich, Peter, and Heinrich Reister. "Turbulent flow in an intake-manifold." Forschung im Ingenieurwesen 61, no. 7-8 (August 1995): 195–200. http://dx.doi.org/10.1007/bf02609484.

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15

Wang, Cai Yun, Zhi Xia He, Xue Sheng Yan, Guo Jun Zhang, and Shuo Wang. "The 3-D Structure Reconstruction of Engine Intake Manifold Based on RE Technology." Advanced Materials Research 1079-1080 (December 2014): 1049–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1079-1080.1049.

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Engine intake system is one of the important parts of the engine which affects the engine’s volume efficiency and the uniformity of air entering to each cylinder directly Wherein the intake manifold with variable length is the important part of the intake system , has great significance value to research. Due to the structure of the manifold is complex, considering the manifold structure which affects the simulation accuracy, the principle of reverse engineering was used in this paper. Firstly, the laser scanning technology was used to obtain the point cloud data of the intake manifold.And then the cloud data was dealed by software Geomagic Studio12、NX Imageware13.The software UG8.0 was used to reconstructure the 3d intake manifold with variable length model.

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16

Zhao, Y., and D. E. Winterbone. "A Study of Multi-Dimensional Gas Flow in Engine Manifolds." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 208, no. 2 (April 1994): 139–45. http://dx.doi.org/10.1243/pime_proc_1994_208_172_02.

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In this study, a three-dimensional Navier—Stokes solver was developed based on the finite volume fluid-in-cell (FVFLIC) method. The objective was to develop a comprehensive engine simulation tool that could predict unsteady flow features in the engine manifold and gas dynamic interaction between the intake system and the engine. Therefore the geometry effect of the manifold on gas dynamics could be fully investigated and later utilized in manifold design. Being shown here are some of the latest results of the research work aiming to validate the simulation program and apply it to the analysis of gas dynamics in manifolds for future design purposes.

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Jiang, Feng, Minghai Li, Jiayan Wen, Zedan Tan, and Wenyun Zhou. "Optimization Analysis of Engine Intake System Based on Coupling Matlab-Simulink with GT-Power." Mathematical Problems in Engineering 2021 (April 8, 2021): 1–17. http://dx.doi.org/10.1155/2021/6673612.

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In the work, the suitable volumetric efficiency is very important for the gasoline engine to achieve the aim of energy-saving and emission reduction. Thus, the intake system characteristics, such as intake manifold length, diameter, volumetric efficiency, and valve phase, should be investigated in detail. In order to investigate the performance optimization of the engine intake system, an optimization model of the engine intake system is developed by the GT-Power coupled with Matlab-Simulink and validated by the experimental results under the different conditions at full load. The engine power-, torque-, and brake-specific fuel consumption are defined as the result variables of the optimization model, and the length and diameter of the intake manifold are defined as the independent variables of the model. The results show that the length of intake manifold has little influence on the engine power and BSFC, and the length of intake manifold has a great impact on the performance index at high speed. In addition, the engine volumetric efficiency is the highest when the length of intake manifold is in the range of 240 and 250 mm. The engine BSFC improved by variable valve timing is significant compared with the original result. Finally, the improvement suggestions for the performance enhancement of the gasoline engine are proposed.

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18

Thompson, S., and C. Gong. "Intake Manifold Modeling for the Fuel Metering Control of Spark Ignited Engines." Journal of Dynamic Systems, Measurement, and Control 119, no. 3 (September 1, 1997): 568–73. http://dx.doi.org/10.1115/1.2801296.

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In order to minimize emissions the Air-Fuel Ratio (AFR) of a spark-ignited internal combustion engine needs to be maintained at stoichiometric. Whenever the air and fuel enter the engine’s cylinder the AFR cannot be changed; therefore the problem of AFR control is a problem of intake manifold control. Although the problem of AFR control (and hence of intake manifold modelling) appears to be solved for a fully warmed-up engine the problem of AFR control during the warm-up period remains. This paper addresses this problem by using a novel AFR control strategy, which can be based on a given intake manifold model, to test the AFR control of a partially warmed-up engine. The results of engine tests demonstrate that during the warm-up period tight AFR control is not possible using any of the intake manifold models developed for a fully warmed-up engine. This can only be the result of unmodeled dynamics in the intake manifold and it is therefore concluded that further work in the area of manifold modelling is required. Possible areas of model improvement are indicated.

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Said, Mohd Farid Muhamad, Zulkarnain Abdul Latiff, Aminuddin Saat, Mazlan Said, and Shaiful Fadzil Zainal Abidin. "Analysis of Variable Intake Runner Lengths and Intake Valve Open Timings on Engine Performances." Applied Mechanics and Materials 663 (October 2014): 336–41. http://dx.doi.org/10.4028/www.scientific.net/amm.663.336.

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In this paper, engine simulation tool is used to investigate the effect of variable intake manifold and variable valve timing technologies on the engine performance at full load engine conditions. Here, an engine model of 1.6 litre four cylinders, four stroke spark ignition (SI) engine is constructed using GT-Power software to represent the real engine conditions. This constructed model is then correlated to the experimental data to make sure the accuracy of this model. The comparison results of volumetric efficiency (VE), intake manifold air pressure (MAP), exhaust manifold back pressure (BckPress) and brake specific fuel consumption (BSFC) show very well agreement with the differences of less than 4%. Then this correlated model is used to predict the engine performance at various intake runner lengths (IRL) and various intake valve open (IVO) timings. Design of experiment and optimisation tool are applied to obtain optimum parameters. Here, several configurations of IRL and IVO timing are proposed to give several options during the engine development work. A significant improvement is found at configuration of variable IVO timing and variable IRL compared to fixed IVO timing and fixed IRL.

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Liu, Tao, Quan Bo Tang, and Jian Hua Zhao. "The Tendency of Oxide Inclusion on Magnesium Alloys Intake Manifold in Tilt Cast." Materials Science Forum 686 (June 2011): 367–70. http://dx.doi.org/10.4028/www.scientific.net/msf.686.367.

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The oxide inclusion formation tendency in tilting cast magnesium alloys intake manifold was studied by numerical simulation. Two different programs were used for results comparison. The results indicate that it was easier to form oxide inclusion when connecting foundry ladle with the junction panel of intake manifold instead of cavity resonator. The oxidation mixture is prone to appear at the ribs and outer wall of the four main air piles of the intake manifold. The formation of oxide inclusion would be influenced by the flowing state of the melt during casting process.

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Faris, Waleed F., Hesham A. Rakha, and Salah A. M. Elmoselhy. "Supercharged diesel powertrain intake manifold analytical model." International Journal of Vehicle Systems Modelling and Testing 9, no. 1 (2014): 1. http://dx.doi.org/10.1504/ijvsmt.2014.059154.

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Jain, Samyak, and Ranjit S. Patil. "Numerical Simulation of Novel Nozzle Intake Manifold." Journal of Physics: Conference Series 1276 (August 2019): 012037. http://dx.doi.org/10.1088/1742-6596/1276/1/012037.

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Li, Peter. "A two-dimensional intake manifold flow simulation." Mathematical Modelling 8 (1987): 437–42. http://dx.doi.org/10.1016/0270-0255(87)90619-1.

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Hall, Bevan, Greg Wheatley, and Mohammad Zaeimi. "On the Design of the Manifold for a Race Car." Periodica Polytechnica Mechanical Engineering 65, no. 2 (March 4, 2021): 171–79. http://dx.doi.org/10.3311/ppme.17325.

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This paper involves the design and construction of the intake manifold system of the FSAE car including the air shroud, air filter, throttle body, restrictor plenum, fuel injectors, fuel rail and runners. To ensure the quality, the proposed system is designed based on the FSAE rules. The design process of the intake manifold system will consist of the usual engineering processes including computer modelling, Finite Element Analysis and finally Computational Fluid Dynamics testing in order to determine the validity of the model and to tune the design in order to obtain the optimum performance out of the intake manifold system as a whole.

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Thamaraikanan, R., M. Anish, B. Kanimozhi, Thomaskutty George, and Vivek George Koshy. "Design and Analysis of an Intake Manifold in an IC Engine." Applied Mechanics and Materials 766-767 (June 2015): 1021–27. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.1021.

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The paper investigates the properly designed Intake or Inlet Manifold (IM) is vital for the optimal performance of an Internal Combustion (IC) engine. The primary function of the intake manifold is to evenly distribute the combustion mixture (or just air in a direct injection engine) to each intake performance of the engine. Even distribution is important to optimize the efficiency and performance of the engine. It is known that uneven air distribution leads to less volumetric efficiency, increased fuel consumption and also power loss. The main objective of the present work was to make a computational study of flow distribution in an intake manifold under steady state turbulence conditions in the current project work an intake manifold for 3-cylinder engine was modeled and analyzed numerically for evaluating the fluid flow. In this process, the geometric model was created with approximate dimensions (by using curves and points) in ANSA a pre-processing tool and the analysis was carried out using STAR CCM+ which is a solver and post-processing tool port in the cylinder head (s).

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Awal Udin, Ahmad Robiul, and Adityo Adityo. "PRESTASI MOTOR DIESEL DENGAN OPTIMALISASI SISTEM INTAKE MANIFOLD PAK SYS (PERFORMANCE AIR INTAKE SYSTEM) TURBO FAN AXIAL." ROTOR 10, no. 2 (November 1, 2017): 32. http://dx.doi.org/10.19184/rotor.v10i2.5586.

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The development of motor vehicle technology has urgency of increasing the efficiency for the engine of fuel requirements that will be used in the combustion process to produce output parameters. One of the elements for an effective combustion process for the fuel mixture composition is the quantity and the air capacity to be supplied for each cylinder. The construction of intake manifold is one of minor losses for requirement capacity of air when intake suction take occured. The addition of Axial Fan in the intake manifold system of diesel motors is expected to meet the air supply capacity and minimize minor losses, so the performance engine like : volumetric efficiency, torque and power increased. Fundamental of air Intake System Performance Method to inducting (forces) amount of the air through Fan Axial Double Blade blades. This study uses a quasi-experimental method that compares the intake manifold with or without the installation of axial (standard) fan to the torque and power generated from four diesel motors (4) steps. From the test obtained an average torque increase of 22%, with the highest torque at the beginning of 1150 rpm engine speed of 41.8 Nm, while the average power increase of 13% with a power rating of 8 KW at 2200 rpm engine speed. While the volumetric efficiency experienced an average increase of 6% with a significant percentage of engine speed of 2200 rpm which reached 98.8%. Keywords: Torque, Power, Diesel, Intake Manifold, Axial Fan

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Babadi, M. Nazemi, and S. Kheradmand. "The Effect of Using the Flow Separator Blade to Increase the Uniformity of Flow in the Intake Manifold." Journal of Mechanics 35, no. 6 (December 2019): 875–85. http://dx.doi.org/10.1017/jmech.2019.27.

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ABSTRACTIn this paper, an idea to make the flow uniform inside the manifolds of four and six cylinder engines without changing their main geometries is presented. In general the uniform distribution of air flow among the engine cylinders is very important. Non-uniform flow in the intake manifold outlets causes inadequate feeding of the cylinders, inappropriate combustion and reduces engine volumetric efficiency. So this matter is vital for improving engine performance. A flow guide blade is added into the manifold and uniformity of the air flow is studied in different regime using transient numerical simulations. The amount of air exited from each outlet and the effect of this blade on flow uniformity is investigated. The results showed that the blade has made the flow more uniform in the manifold outlets and it was also found that in the four-cylinder and six-cylinder engines the flow uniformity is increased by 67% and 75%, respectively. In other words, as the number of engine cylinders increase, the effect of using this blade increases.

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Tutunea, Dragos, Alexandru Oprica, Ana Maria Nicu, Diana Camelia Staicu, and Ilie Dumitru. "CFD and Structural Analysis of the Intake Manifold Flap of an Internal Combustion Engine." Applied Mechanics and Materials 880 (March 2018): 195–200. http://dx.doi.org/10.4028/www.scientific.net/amm.880.195.

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The objective of this study is to analyze the flow filed in the intake manifold using Computational Fluid Dynamics (CFD). The main function of the intake manifold flap is to regulate the air flow and to uniformly distribute in the cylinders. If the air is distributed uneven to the engine the volumetric efficiency, power and fuel consumption is reduced. The finite element method can be used to optimize the throttle flap. The results in the simulation offer valuable information’s of the flow field in the throttle assembly. The results show that the CFD model can be used as a tool for improve and optimize various part of the intake manifold flap.

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Beroun, Stanislav, Pavel Brabec, and Aleš Dittrich. "Vehicle SI Engine with MPI of Liquid State LPG." Journal of Middle European Construction and Design of Cars 14, no. 1 (June 1, 2016): 41–47. http://dx.doi.org/10.1515/mecdc-2016-0004.

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Abstract The first part of the article reviews the possible methods for LPG and air mixture forming (injection of gaseous or liquid state LPG) and their influence on the operating properties of an SI engine. The next chapter explains the processes that take place when liquid state LPG is injected into the air flow of an internal combustion engine intake manifold. A simplified calculation is used to show that the injection of liquid state LPG is associated with extreme low temperature of the LPG injected into intake manifold and with ice formation on the outlet nozzle. The article sets out the design of an end part injector (EPI) for liquid state LPG that reduces the risk of icing of the outlet nozzle. The results of experimental research indicate very good operational properties for a vehicle SI engine with the combustion mixture formed by the injection of liquid state LPG into the engine intake manifold. The calculation results are confirmed by recording plots of LPG pressure inside the end part of injector (EPI) and the temperature on the outlet nozzle (ON) of the LPG injector. Visual inspection of injection of liquid state LPG into the intake manifold clearly supports the performed measurements. The conclusions summarize the knowledge gained from the laboratory investigation of liquid state LPG injection into an engine intake manifold.

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Akunov, B. U., and K. Dj Kasymbekov. "INFLUENCE OF AIR TEMPERATURE ON DURATION OF IMPULSE OPENING SPRAY IN THE ENGINE INTAKE MANIFOLD WHILE CAR OPERATION IN VARIOUS CONDITIONS." Russian Automobile and Highway Industry Journal 16, no. 1 (March 1, 2019): 32–39. http://dx.doi.org/10.26518/2071-7296-2019-1-32-39.

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Introduction. The air temperature in the intake manifold is used by an electronic engine control unit to adjust the injection time of the fuel injector top. The intake air temperature is variable and depends on the operating conditions of the vehicle. When air intake temperature decreases, the duration of the nozzle opening pulse increases and, conversely, as air intake temperature increases, the duration of thenozzle opening pulse decreases.Materials and methods. The paper demonstrates the analysis of the air temperature effect in the intake manifold of the engine on the duration of the injector opening pulse while the engine is idling and when the vehicle is moving with different speed conditions on the flat, mountainous and alpine sections of the road.Results. As a result, the research showes that the movement of the car at high speeds on the flat sections of the road leads to a significant decrease of air temperature in the intake manifold and an increase in the duration of the injector opening pulse. Moreover, when the vehicle moves on the mountainous sections of the road, the effect of air temperature in the intake manifold on the nozzle opening impulse duration is insignificant, since the speed of the vehicle movement is influenced by the complexity of the terrain and the parameters of the mountain and high-mountain roads.

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Mahmood, Hussein A., Ali O. Al-Sulttani, Osam H. Attia, and Nor Mariah Adam. "A numerical study to improve the position and angle of the producer gas injector inside the intake manifold to minimize emissions and efficiency enhancement of a bi engine." EUREKA: Physics and Engineering, no. 5 (September 13, 2021): 100–109. http://dx.doi.org/10.21303/2461-4262.2021.002045.

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To develop a petrol engine so that it works under the bi-engine pattern (producer gas-petrol) without any additional engine modifications, a single-point injection method inside the intake manifold is a simple and inexpensive method. Still, it leads to poor mixing performance between the air and producer gas. This deficiency can cause unsatisfactory engine performance and high exhaust emissions. In order to improve the mixing inside the intake manifold, nine separate cases were modelled to evaluate the impact of the position and angle orientation inside the intake manifold on the uniformity and spread of the mixture under AFR=2.07. A petrol engine (1.6 L), the maximum engine speed (8000 rpm), and bi-engine mode (petrol-producer gas engine). The employ of the numerical simulation software (ANSYS workbench 19), the propagation, flow characteristics, and uniformity of the blend within the nine different cases were evaluated. According to the outcomes of the numerical simulation, it was found that creating vortices and turbulent flow for the producer gas and air inside the intake manifold is the perfect method to obtain a uniformity mixture of air and producer gas inside the intake manifold. In addition, extending the blending duration allows air and producer gas fuel to be mixed efficiently. Furthermore, the greatest uniformity and the maximum spread rate at the outlet of manifold are obtained in cases 1, 4, and 7, when the producer gas injector location is constant (P1, P2 or P3). In addition, the weakest spread of producer gas at the outlet of the manifold is observed in case 9 in comparison with the other cases. Moreover, it is observed that case (1) generated the maximum uniformity index (UI) level

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Záležák, Zoltán, Rastislav Bernát, and Norbert Kecskés. "Influencing of Combustion Ecology of Diesel Engines by their Intake Resistance." Advanced Materials Research 1059 (December 2014): 105–10. http://dx.doi.org/10.4028/www.scientific.net/amr.1059.105.

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As it is generally known, diesel engines operate with air excess, i.e. lean mixtures. Intake resistances in intake manifolds of diesel engines negatively influence their ecological parameters. Based on these facts, we may conclude that less air in the intake manifold causes increased production of exhaust fumes and fuel consumption. One of the reasons of increased intake resistance is a blocked air filter. In the experiment, we have simulated the increased intake resistance and wished to point out possible consequences of pressure drop at the end of the compression stroke. The choking effect was realized by means of a throttle and scale, which was mounted on the air filter position. By using the dynamic method and obtained results, we found that choking at the rotation angle of 90° and 45° caused the difference of 0.16 MPa of the measured quantity during the maximum revs set on 2000 min-1. The difference in pressure at the end of the compression stroke with the rotation angle of 30° and 90° was by 0.86 MPa higher. Pressure drop in manifold showed the value 0.15 MPa. Manufacturers recommend regular replacement of air cleaners of combustion engines in service intervals; however, we must also keep in mind the environment in which the engine operates. In excessively dusty and otherwise polluted areas, it is necessary to replace cleaners a bit earlier.

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Yu, Bo Lin, and Fa Hong Yu. "Sampling Flow Channel Design in Automobile Engine Intake Manifold." Advanced Materials Research 821-822 (September 2013): 1450–55. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1450.

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As a result of turbulence and wide flow velocity range, flow velocity in engine intake manifold cannot be tested directly by using a thermal flow sensor. In this study, a sampling flow channel is designed according to the testing conditions and range of the thermal flow sensor. The flow velocity in the whole intake manifold was simulated by the finite element method software program. was found proportional to , and slope K was constant. ranged from 0 m/s to 4.8 m/s at the suitable outlet position of the sampling flow channel, which could be tested for the thermal flow sensor. The mass flow intake manifold was obtained by testing the mean flow velocity in the test section of the sampling flow channel .

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Gangopadhyay, Anupam, and Peter Meckl. "Modeling and Validation of a Lean Burn Natural Gas Engine." Journal of Dynamic Systems, Measurement, and Control 123, no. 3 (May 19, 1998): 425–30. http://dx.doi.org/10.1115/1.1386790.

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In this paper, a control-oriented model of a medium-duty throttle-body natural gas engine is developed. The natural gas engine uses lean-burn technology without exhaust gas recirculation (EGR). The dynamic engine model differs from models of gasoline engines by including the natural gas fuel dynamics in the intake manifold. The model is based on a mean value concept and has three state variables: intake manifold pressure, fuel fraction in the intake manifold and the engine rotational speed. The resulting model has been validated in steady-state and transient operation over the usual operating range of the engine between 800 rpm and 2600 rpm with air/fuel ratios ranging between 18.0 and 24.0.

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Yeom, Kyoung-Min, and Sung-Young Park. "Intake-Air Flow and Distribution Characteristics of the Gasoline Engine Intake-Manifold." Journal of the Korea Academia-Industrial cooperation Society 12, no. 11 (November 30, 2011): 4718–25. http://dx.doi.org/10.5762/kais.2011.12.11.4718.

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Ashhab, M. S. S., A. G. Stefanopoulou, J. A. Cook, and M. B. Levin. "Control of Camless Intake Process—Part II1." Journal of Dynamic Systems, Measurement, and Control 122, no. 1 (July 14, 1998): 131–39. http://dx.doi.org/10.1115/1.482448.

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A model-based control scheme is designed to regulate the cylinder air charge of a camless multicylinder engine for unthrottled operation. The controller consists of a feedforward and an adaptive feedback scheme based on a control-oriented model of the breathing process of an engine equipped with electro-hydraulic springless valvetrain. The nonlinear control scheme is designed to achieve cylinder-to-cylinder balancing, fast cycle-to-cycle response, and minimization of pumping losses. The algorithm uses conventional sensor measurements of intake manifold pressure and mass air flow to the intake manifold, and intake valve duration measurement. Closed-loop simulation results are shown for a four-cylinder engine. [S0022-0434(00)03001-X]

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Zsiga, Norbert, Christoph Voser, Christopher Onder, and Lino Guzzella. "Intake Manifold Boosting of Turbocharged Spark-Ignited Engines." Energies 6, no. 3 (March 13, 2013): 1746–63. http://dx.doi.org/10.3390/en6031746.

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Acquati, F., L. Battarola, R. Scattolini, and C. Siviero. "An Intake Manifold Model for Spark Ignition Engines." IFAC Proceedings Volumes 29, no. 1 (June 1996): 7945–50. http://dx.doi.org/10.1016/s1474-6670(17)58971-5.

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Brackett, Stephen E. "Engine intake manifold tuning by active noise control." Journal of the Acoustical Society of America 94, no. 4 (October 1993): 2472. http://dx.doi.org/10.1121/1.407405.

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Sardar, Paramjotsingh, and Arshdeepsingh Sardar. "Designing of intake manifold for Formula Student car." World Journal of Engineering 15, no. 3 (June 11, 2018): 402–6. http://dx.doi.org/10.1108/wje-09-2017-0289.

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Purpose The purpose of this research was to design an intake manifold which will improve the functioning of the engine. This will improve the acceleration of the car which will help in performing better at the dynamic events at a Formula Student Competition. Design/methodology/approach The approach was to use the Helmholtz resonator theory to find the appropriate runner length for the desired rotation per minute range. Along with this, it is important to ensure that there is minimum flow separation for which computational fluid dynamics analysis was carried out. Findings The research showed that all the processes involved in this system are dynamic, so steady-state analysis is not quite relevant instead transient analysis will help in getting a better idea. Originality/value Majority of research is primarily focused on convergent divergent nozzle, to try and minimize the effect of the restrictor. But to fine-tune the performance of the engine, it is important to consider the effects of runners and plenum so as to choose appropriate runner length and plenum volume.

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Kurniawan, Dedi, Husin Bugis, and Basori Basori. "ANALYSIS OF THE EFFECT OF CYCLONE TURBO INSTALLATION AND INTAKE MANIFOLD MODIFICATION ON WASTE GAS EMISSIONS IN CARBURETOR MOTORCYCLE." Journal of Mechanical Engineering and Vocational Education (JoMEVE) 1, no. 2 (April 2, 2019): 70. http://dx.doi.org/10.20961/jomeve.v1i2.25070.

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The purpose s of this research are: (1) to Investigate the influence of the installation of turbo cyclone against the exhaust emissions of CO and HC on a motorcycle carburetor; (2) to study the influence of the intake manifold towards the exhaust emissions of CO and HC on the carburetor motorcycle; (3) to investigate the installation of turbo cyclone and modification of intake manifold toward the exhaust emissions of CO and HC on a carburetor motorcycle. The research use experimental method with a quantitative descriptive data analysis. The population in this research is a carburetor motorcycle. A selected sample in this research is Yamaha Byson 150CC year 2012. Data were obtained from a large measurement exhaust emission levels CO and HC for 20 seconds at idle rotation with the installation of turbo cyclone and intake manifold (swirl) modification. The research results are: (1) the installation of turbo cyclone decreases the quality of the exhaust emission of CO and HC of Yamaha Byson 150 CC motorcycle. (2) the installation of intake manifold modification (swirl) can be lower the level of exhaust emissions of CO and HC for Yamaha Byson 150 CC motorcycle. (3) the installation of turbo cyclone and swirl cans lower the level of exhaust emissions of the Yamaha Byson 150 CC motorcycle

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Pahmi, A., M. Hisyam Basri, M. E. Mustaffa, Y. Yaakob, H. Sharudin, N. I. Ismail, and R. J. Talib. "Intake pressure and brake mean effective pressure analysis on various intake manifold design." Journal of Physics: Conference Series 1349 (November 2019): 012080. http://dx.doi.org/10.1088/1742-6596/1349/1/012080.

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Bondar, Vladimir, Sergei Aliukov, Andrey Malozemov, and Arkaprava Das. "Mathematical Model of Thermodynamic Processes in the Intake Manifold of a Diesel Engine with Fuel and Water Injection." Energies 13, no. 17 (August 20, 2020): 4315. http://dx.doi.org/10.3390/en13174315.

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The article presents the results of a study aimed at creating a mathematical model of thermodynamic processes in the intake manifold of a forced diesel engine, taking into account the features of simultaneous injection of fuel and water into the collector. In the course of the study, the tasks of developing a mathematical model were solved, it was implemented in the existing software for component simulation “Internal combustion engine research and development” (ICE RnD), created using the Modelica language, and verification was undertaken using the results of bench tests of diesel engines with injection fuel and water into the intake manifold. The mathematical model is based on a system of equations for the energy and mass balances of gases and includes detailed mathematical submodels of the processes of simultaneous evaporation of fuel and water in the intake manifold; it takes into account the effect of the evaporation of fuel and water on the parameters of the gas state in the intake manifold; it takes into account the influence of the state parameters of the working fluid in the intake manifold on the physical characteristics of fuel and water; it meets the principles of component modeling, since it does not contain parameters that are not related to the simulated component; it describes the process of simultaneous transfer of vapors and non-evaporated liquids between components; and it does not include empirical relationships requiring data on the dynamics of fuel evaporation under reference conditions. According to the results of a full-scale experiment, the adequacy of the mathematical model developed was confirmed. This model can be used to determine the rational design parameters of the fuel and water injection system, the adjusting parameters of the forced diesel engine that provide the required power, and economic indicators, taking into account the limitations on the magnitude of the mechanical and thermal loads of its parts.

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Srisattha, T., S. Issarakul, Wishsanuruk Wechsatol, and K. Wannatong. "Transient Behavior of Air Flow through the Intake Manifold of a Heavy Duty Diesel Engine." Applied Mechanics and Materials 87 (August 2011): 146–50. http://dx.doi.org/10.4028/www.scientific.net/amm.87.146.

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This research is aimed to study the transient behavior of air flow through the intake manifold of a heavy duty diesel engine according to the step of valve opening. The numerical study of air flow through the intake manifold was done on the 6SD-1 Isuzu engine. Two numerical techniques, finite element and finite volume methods were used in comparison and tendency confirmation of air flow characteristics inside the manifold. The transient air flow was studied at the engine speed of 1,000 rpm, 1,500 and 2,000 rpm. The numerical results from both numerical techniques agree exceptionally well with each other. The transient behavior of air flow according to the step of valve opening is well illustrated.

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Su, Zhongya, Enbin Liu, Yawen Xu, Ping Xie, Chen Shang, and Qiyong Zhu. "Flow field and noise characteristics of manifold in natural gas transportation station." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 74 (2019): 70. http://dx.doi.org/10.2516/ogst/2019038.

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Manifolds play a role of pressure balance, buffering and rectification for different branch pipelines, the flow noise of manifolds has been a serious problem all this time in natural gas transmission station. By changing the number of outlet pipes of manifolds and the different positions of intake pipes, the distribution of the Sound Pressure Level (SPL) of the manifold flow noise is analyzed based on the Ffowcs Williams-Hawkings (FW-H) acoustic analogy theory and Large Eddy Simulations (LESs). The three-dimensional simulation analysis of the flow field shows that pressure pulsation is the mainly source of manifold noise, as the number of outlet pipe increases, the SPLs of fluid dynamic noise at the end of inlet pipes are significantly reduced by about 10 dB on average, when the inlet and outlet piping are oppositely connected, the SPL is 2 dB~3 dB lower than that in staggered connections. An expansion-chamber muffler is designed with the analysis of its noise reduction effect, the results show that after the muffler is installed, the noise reduction in the low-frequency ranges reaches up to 37.5 dB, which controls the maximum noise to around 82 dB.

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Vo, Toan Danh, and Cong Thanh Huynh. "Simulation on engine characteristic improvement by re-designing intake manifold." Science and Technology Development Journal 18, no. 4 (December 30, 2015): 31–38. http://dx.doi.org/10.32508/stdj.v18i4.983.

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In this paper, a simulation of DI diesel engine 1 cylinder, model RV165-2 is used to investigate the effect of intake manifold design on the volumetric efficiency and characteristics by using AVL BOOST software. The proposed plans are evaluated and compared with available models. Conditions of simulation is based on the structure of engine and parameters from experimental test. The parameters of performance, combustion and emission characteristics are selected as evaluation criteria. The results of optimizing intake manifold are increasing volumetric efficiency, ability to blend the mixture of fuel and air, better combustion and increasing engine power, reducing fuel consumption and emission.

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Delogu, Massimo, Francesco Del Pero, Filippo Romoli, and Marco Pierini. "Life cycle assessment of a plastic air intake manifold." International Journal of Life Cycle Assessment 20, no. 10 (August 11, 2015): 1429–43. http://dx.doi.org/10.1007/s11367-015-0946-z.

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Wen, Shirong, Baolei Wei, and Huabei Tong. "Design and Performance Analysis of B15 Engine Intake System." Frontiers of Mechatronical Engineering 1, no. 1 (February 7, 2018): 1. http://dx.doi.org/10.18282/fme.v1i1.596.

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In recent years, with the development of the economy, the automobile industry has also undergone ever-changing changes. At present, the design of the engine in addition to the car to achieve the dynamic, economic indicators but also need to meet their emissions and noise requirements, it is necessary for the engine into the exhaust system for in-depth study. The intake system mainly comprises two parts of the pipeline and the intake manifold before the intake manifold, in which the pipeline in front of the manifold acts to reduce the intake noise. How to design the components of the intake system reasonably and analyze its comprehensive performance is the most important topic in the project.Firstly, this article introduces the principle of variable valve timing and variable intake manifold technology, establishes B15 engine model in GT-Power software and uses the test data to complete the calibration of the model so that the error is not more than 5% for subsequent simulation calculations. In order to design the silencer element of the intake system, the sensitivity of the parameters of the Helmholtz resonator, 1/4 wavelength tube and air ﬁlter is calculated and analyzed, and the inﬂuence of the parameter change on the muﬄer performance is summarized. The design ﬂow and method of the intake muﬄer element are described in detail, and the concrete design scheme is put forward. The noise of the muﬄer element is optimized according to the problem that the noise of the individual order is higher than the target value. After the optimization of the intake system air intake noise improved significantly, the pressure loss is no higher than 2.5 kPa, in line with the target value requirements, the optimization effect is good.Secondly, in order to analyze the performance of the intake manifold, three methods are proposed: the zero-dimensional or one-dimensional model is used to simplify the processing, and the CFD software is used to calculate the steady-state or isolated transients and the coupling analysis using one-dimensional and three-dimensional software. By comparing the advantages and disadvantages of the three methods, it is found that the coupling of software can obtain real-time boundary condition in the calculation process and have high accuracy. This paper focuses on the key issues that need to be solved by coupling with GT-Power and STAR-CCM + software and completes the calculation of the model.Finally, in order to evaluate the advantages and disadvantages of the intake muﬄer element better, the maximum noise of the intake system is calculated by using the model of the vehicle acceleration in the GT-Power software, and the maximum noise of the intake system is 61.8 dB (A) which satisfies the target requirement for the individual contribution rate through noise.

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Engkuah, Stannely, Henry Nasution, and Azhar Abdul Aziz. "Performance Characteristic Study on Air to Water Intercooler." Applied Mechanics and Materials 819 (January 2016): 42–45. http://dx.doi.org/10.4028/www.scientific.net/amm.819.42.

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The automotive vehicle with turbocharger engine will produce the high temperature charged air compared to the naturally aspirated engine. By increasing the pressure of the air, the temperature of the air will be increased while the air density will be decreased. The charged air needs to be cooled down to get the higher density of the charge air before flowing into the intake manifold. The charge air becomes denser when the temperature of the air is reduced and the denser air gives more advantages for the engine run efficiently. The intercooling system is one of the important devices in cooling process of the turbocharger engine. The function of the intercooler system is for cooling the temperature of the turbocharger outlet before the intake manifold. For this research, the water is used as the medium for cooling the temperature of the charge air before the intake manifold instead using of direct air that is the basic medium of intercooling system. The liquid cooled intercooler system type is constructed which wants to make it practically in daily life, such as for increasing the performance of the car and also for saving the fuel consumption of a vehicle.

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Majedi, Farid, Indarto Yuwono, and Windi Nugroho. "Penggunaan Modul Thermoelectric (Elemen Peltier) Pada Sistem Pendingin Bahan Bakar Bensin." JEECAE (Journal of Electrical, Electronics, Control, and Automotive Engineering) 3, no. 1 (July 11, 2018): 163–66. http://dx.doi.org/10.32486/jeecae.v3i1.206.

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Abstrak— Efisiensi volumetrik motor 4 langkah pada dasarnya tidak mencapai 100% tetapi hanya berkisar antara 65-85%. Hal ini di pengaruhi oleh Tipe bahan bakar, air/fuel ratio, Temperatur campuran udara-bahan bakar, Compression ratio, Putaran mesin, Desain intake dan exhaust manifold, Geometri dan ukuran katup termasuk valve lift and timing. Salah satunya adalah dengan mendinginkan suhu bahan bakar bensin agar menjadi lebih dingin. Dengan permasalahan ini penulis mencoba riset tentang Penggunaan Modul Thermoelectric (Elemen Peltier) Pada Sistem Pendingin Bahan Bakar Bensin. Dalam penelitian ini akan menguji penurunan temperatur pada ruang pelampung karburator dan intake manifold, dan juga akan menguji pengaruh pemakaian modul termoelectric terhadap daya dan torsi. Dari hasil pengujian didapatkan terjadi penurunan temperatur pada campuran bahan bakar dan udara (intake manifold) sebesar 4 -8,9%. Sedang temperatur bensin di pelampung karburator juga mengalami penurunan sebesar 6,9 -15,1%. Dalam penggunaan modul termoelektrik ini juga menguji perfoma mesin. Dari hasil pengujian didapat hasil nilai daya mesin dengan modul termoelektik naik antara 0 – 8,8 % dibanding dengan daya mesin tanpa modul termoelektrik. Torsi mesin dengan modul termoelektrik naik 0 – 8,8 % dibanding dengan torsi mesin tanpa modul termoelektrik.

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Journal articles on the topic 'Intake manifold'

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