Journal articles: 'Exhaust system'

1

Verbeck, Gerd, and Hans Joachim Schade. "Exhaust System." ATZextra worldwide 12, no. 1 (September 2007): 160–65. http://dx.doi.org/10.1365/s40111-007-0031-0.

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Verbeck, Gerd, and Christoph Blauensteiner. "Exhaust System." ATZextra worldwide 13, no. 2 (June 2008): 96–99. http://dx.doi.org/10.1365/s40111-008-0065-y.

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VerbecK, Gerd, and Jens Kosyna. "EXHAUST SYSTEM." ATZextra worldwide 15, no. 11 (January 2010): 70–73. http://dx.doi.org/10.1365/s40111-010-0241-8.

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Ziehl, John C. "Exhaust silencer system." Journal of the Acoustical Society of America 124, no. 1 (2008): 26. http://dx.doi.org/10.1121/1.2960794.

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Wörner, Siegfried, and Ulrich Sigel. "Exhaust gas system." Journal of the Acoustical Society of America 126, no. 5 (2009): 2835. http://dx.doi.org/10.1121/1.3262560.

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Bian, Jing, Liqiang Duan, and Yongping Yang. "Simulation and Economic Investigation of CO2 Separation from Gas Turbine Exhaust Gas by Molten Carbonate Fuel Cell with Exhaust Gas Recirculation and Selective Exhaust Gas Recirculation." Energies 16, no. 8 (April 18, 2023): 3511. http://dx.doi.org/10.3390/en16083511.

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The paper presents a simulation investigation of using a molten carbonate fuel cell (MCFC) combined with exhaust gas recirculation (EGR) or selective exhaust gas recirculation (SEGR) to reduce CO2 emission from the gas turbine in order to cope with climate change problem. EGR or SEGR can be used to concentrate the low-concentration CO2 in gas turbine exhausts. The CO2 concentration is then raised further by adding gas turbine exhaust to the MCFC’s cathode. The suggested gas–steam combined cycle system paired with MCFC and CO2 collection without EGR is contrasted with two novel gas–steam combined cycle systems integrated with MCFC, EGR, or SEGR with CO2 capture (the reference system). The thermal efficiency of the gas–steam combined cycle systems’ integrated MCFC, EGR and SEGR with CO2 collection is 56.08%, which is 1.3% higher than the reference system. The cost of CO2 avoided in the new system with SEGR will be equal to that of the system with the MEA technique for CO2 capture if the MCFC cost is reduced to 904.4 USD/m2.

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LIN, SHENGBIN BURT. "EXHAUST SYSTEM RELIABILITY EVALUATION." International Journal of Reliability, Quality and Safety Engineering 18, no. 04 (August 2011): 327–40. http://dx.doi.org/10.1142/s0218539311004275.

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Road vibrations cause fatigue failures in the automotive exhaust system. Evaluation of exhaust system reliability is investigated by using bivariate joint distribution model to account for dependence between exhaust components. Cumulative damages are derived to be used as the random variables in the distribution model. In the case study with a light duty truck exhaust system, the model parameters were estimated using maximum likelihood method based on marginal distributions. The dependence parameters between components were determined through bench tests of twelve (12) exhaust systems. Result comparison demonstrated the influence of component dependence on the point estimate and statistic inference of the system reliability.

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Anilovich, Dr Igor, Michael Schellong, John W. Siekkinen, and John F. Van Gilder, PE. "Exhaust System Performance Diagnostic." IFAC Proceedings Volumes 43, no. 7 (July 2010): 105–10. http://dx.doi.org/10.3182/20100712-3-de-2013.00015.

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Brooks, Norman, and Doru N. Serban. "Variable tuned exhaust system." Journal of the Acoustical Society of America 122, no. 6 (2007): 3150. http://dx.doi.org/10.1121/1.2822953.

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&NA;, &NA;. "Sterile ViewTM Exhaust System." Orthopaedic Nursing 7, no. 1 (January 1988): 52. http://dx.doi.org/10.1097/00006416-198801000-00015.

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N, Dr Anish M., Abhiraj P, Devanand N S, and Vignesh A. "Automobile Exhaust Purification System." International Journal of Engineering Research in Mechanical and Civil Engineering (IJERMCE) 9, no. 6 (June 24, 2022): 33–36. http://dx.doi.org/10.36647/ijermce/09.06.a006.

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In accordance with globalization, privatization etc., India is the 5th largest auto market in the world. Along with that, India ranks 3rd in carbon emission as per the data of 2020 proving, the total CO2 emission has been increased to 988.6 tonnes per year. Hence, there is a tremendous increase in air pollution. In some cities, 80% of air pollution is from automobile exhaust. Although coming is an era of e-mobility, the immediate transformation from internal combustion engine to electric vehicle seems to be hectic. This is because of many factors such as expense, charging facility, power etc. Analyzing the difficulty in the rapid face change, suitable techniques can be introduced which can purify and reduce the automobile exhaust minimizing the amount of harmful chemicals in it. The chemicals coming after EGR (Exhaust Gas Re-circulation) include CO2, SO2, NO2, CO and hydrocarbons which could generate particulate matter. These contaminants are a threat to the living beings as well as the archaeological monuments. There exists another fact that the arrival of the vehicle scrappage policy may be an unfortunate hit for the owners having vehicles older than 20 years. Due to the harmful exhaust gas, these are to be scrapped even though they have high performance at the scrapping time. Hence, this project discusses various techniques which can be employed to absorb the hazardous pollutants from the exhaust gas before releasing to the atmosphere. The project explains the various experimental methods including catalysis, honeycomb filtering, UV method etc., resulting in the design of an efficient tail gas purification system in a moving vehicle. Hence, through proper research if the project gives a good result in the purification process, this might be an excellent solution for the above addressed problems.

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12

Min Xu, Jian, Shuiting Zhou, and Shui xuan Chen. "An Analysis of the Vibration Characteristics of Automotive Exhaust Systems and Optimization of Suspension Points." Open Mechanical Engineering Journal 8, no. 1 (December 31, 2014): 574–80. http://dx.doi.org/10.2174/1874155x01408010574.

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In order to reduce the impact of automotive exhaust systems on the vehicle vibration, finite element modal analyses of the exhaust system of a motor vehicle are conducted in its natural state, partially constraints state and fully constraints state. The natural frequencies and mode shapes of the exhaust system are obtained. The harmonic analysis is conducted on the basis of the modal analysis. The results show that: the vibration amplitude of the exhaust system at lowspeed operating condition is relatively bigger than that of the exhaust system in high-speed conditions. The excitation frequency of the engine at the idle and economy speed can avoid the natural frequency of the exhaust system, so it can be stated that the system has good dynamic characteristics. Suspension points on the exhaust system are optimized and the optimal mounting points are located based on the method of the average drive DOF displacement (ADDOFD). The study has practical significance for reducing the vibration of automobile exhaust systems and the vehicle.

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13

Mara, I. M., I. B. Alit, I. G. B. Susana, and I. M. Nuarsa. "Aplikasi medan magnet pada saluran bahan bakar sepeda motor untuk penghematan konsumsi bahan bakar dan penurunan emisi gas buang." Dinamika Teknik Mesin 12, no. 1 (April 1, 2022): 45. http://dx.doi.org/10.29303/dtm.v12i1.500.

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Reducing fuel consumption and improving fuel quality in motorcycle engines are very important in order to make the exhaust gas emission from the engine becomes more environmentally friendly. In this study, a magnetic field is attached to the fuel line so that the fuel is affected by the magnetic field. The magnetic field is obtained from electromagnetic magnets and permanent magnets. Fuel consumption is tested on a motorcycle engine that it uses a carburetor system and on an engine that uses a fuel injection system. The exhaust emissions observed were CO and HC by using exhaust gas analyzer. The results showed that the use of a magnetic field mounted on the fuel line can reduce the fuel consumption of a motorcycle engine, using either a carburetor system or a fuel injection system by an average of 18%. The use of magnetic fields also shows a very good effect in reducing exhaust gas emissions from motorcycle engines. The length of the magnet attached to the fuel line, 80mm provides a reduction in exhaust gas emissions of CO by 80% - 90% and HC by 60% - 77%. The percentage reduction in exhause gas emission is better than the other length of magnets.

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Mara, I. Made, and I. Made Nuarsa. "Aplikasi medan magnet pada saluran bahan bakar sepeda motor." Jurnal Energi Dan Manufaktur 14, no. 2 (January 12, 2022): 44. http://dx.doi.org/10.24843/jem.2021.v14.i02.p02.

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Reducing fuel consumption and improving fuel quality in motorcycle engines are very important in order to make the exhaust gas emission from the engine becomes more environmentally friendly. In this study, a magnetic field is attached to the fuel line so that the fuel is affected by the magnetic field. The magnetic field is obtained from electromagnetic magnets and permanent magnets. Fuel consumption is tested on a motorcycle engine that it uses a carburetor system and on an engine that uses a fuel injection system. The exhaust emissions observed were CO and HC by using exhaust gas analyzer. The results showed that the use of a magnetic field mounted on the fuel line can reduce the fuel consumption of a motorcycle engine, using either a carborator system or a fuel injection system by an average of 18%. The use of magnetic fields also shows a very good effect in reducing exhaust gas emissions from motorcycle engines. The length of the magnet attached to the fuel line, 80mm provides a reduction in exhaust gas emissions of CO by 80% - 90% and HC by 60% - 77%. The percentage reduction in exhause gas emission is better than the other length of magnets.

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15

Zhou, Dong Yi, Chu Ping Shi, and Wen Hua Yuan. "Research on LiBr Absorption Refrigeration System Using Automotive Exhausted Heat." Advanced Materials Research 317-319 (August 2011): 2297–301. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.2297.

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Based on the structure and characteristic of automotive refrigeration system and engine circulation cooling water system and exhausted waste heat system, combing the working principle of lithium bromide absorption refrigeration system, the authors used the automotive exhaust pipe and cooling water tank improved as the generator of the lithium bromide absorption refrigeration system, which might realize the objective using the lithium bromide absorption hot-cold water unit to replace the automobile air conditioning refrigeration and heating system and the automobile engine cooling system. The methods of the thermodynamics, the heat transfer, the hydrodynamics are used to do the computation of the thermodynamic and the heat transfer area of the lithium bromide absorption refrigeration system. The result shows that it makes good use of exhausted heat of engine circulation cooling water and exhausted waste and reduces the consumption of oil. And structure is simple and compact for small heat transfer area of the automotive exhaust pipe and cooling water tank improved.

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16

Boyarshinov, M. G., and N. I. Kuznetsov. "Thermal Regime of Automobile Exhaust System at Low Temperature." World of Transport and Transportation 17, no. 4 (January 15, 2020): 48–67. http://dx.doi.org/10.30932/1992-3252-2019-17-48-67.

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Currently operation of cars in large cities in winter is the most unfavorable from the point of view of the risk of blocking the exhaust system by condensate accumulated in it. Frequent starts during relatively short period of time, or the cycle of start-up – short run – and subsequent long-term parking at low temperatures are dangerous because the exhaust system does not have time to warm up and remove the accumulated condensate. Daily operation in such modes contributes to rapid accumulation of condensate, and subsequent long-term parking at ambient temperatures below 0˚C are equally dangerous because, depending on the design features of the exhaust system elements, condensation may occur and freeze in the exhaust system, icing can occur inside it or at its exit, causing inability to start the engine. Given that most of the territory of Russia is located in the areas of moderate and cold climate, the relevance of studies, aimed at identifying the patterns of condensate formation and accumulation in the exhaust system, at adjusting on this basis the frequency of condensate removal from the exhaust system, as well as at optimizing the design parameters of the exhaust systems, is quite evident. The objectives of this study were: to identify the features of changes in temperature of the elements of the exhaust system when the automobile engine warms up at low ambient temperature, the effect of various modes of the heater operation on the temperature of the elements of the exhaust system, as well as the features of the temperature change of individual elements of the exhaust system depending on time for various ambient temperatures. To achieve those objectives a series of experiments has been conducted to study the process of starting the «cold» engine, and of its warming up in idle mode. The found dependencies can be used to develop methodology to adjust the recommended periodicity of warming up of the exhaust system, as well as a model of a device that will ensure the absence of condensate in exhaust systems during the operation of cars in large cities during winter period.

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17

Wang, Gang, Mingsheng Liu, Yujie Cui, and David Yuill. "Retrofit Constant Speed Fan Laboratory Exhaust Systems Using Multi-Stack and Variable Frequency Drive Techniques." Journal of Solar Energy Engineering 126, no. 1 (February 1, 2004): 610–13. http://dx.doi.org/10.1115/1.1637641.

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Constant speed fan exhaust systems are the most popular exhaust system in laboratory buildings since they satisfy building architectural requirement, and have low initial costs with reliable performance. The constant speed fan exhaust system maintains constant stack exit velocity to prevent toxic exhaust air downwash back to occupied areas near the building or on the roof top. To achieve constant velocity when the exhaust airflow is less than the design value, makeup air is introduced to the system at the inlet of the exhaust fan. Since the laboratory exhaust airflow is often significantly less than the design airflow, exhaust fans consume significantly more energy than is necessary. Multi-stack and Variable frequency drive techniques can reduce both the make-up airflow rate and fan energy in the constant speed fan exhaust system retrofit. This paper introduces the application principles, describes the optimal methods of stack sizing, and presents an example. The application example showed that the average annual fan power is 50% of the design fan power for a two-stack system, and 47% for a three-stack system.

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18

Miya, Masakazu. "Ecosafe System-Diesel Exhaust Particulate Filter System-." MEMBRANE 33, no. 1 (2008): 39–43. http://dx.doi.org/10.5360/membrane.33.39.

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19

Eickstädt, Jörg, Florian Adlkofer, and Siamak Alizadeh. "FUEL SYSTEM, DRIVETRAIN MOUNTINGS AND EXHAUST SYSTEM." ATZextra worldwide 16, no. 7 (July 2011): 52–55. http://dx.doi.org/10.1365/s40111-011-0296-1.

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20

KANNO, HAJIME. "Introduction of Exhaust Ventilation System." Shigen-to-Sozai 108, no. 9 (1992): 666–68. http://dx.doi.org/10.2473/shigentosozai.108.666.

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21

Rolinski, Adam. "Exhaust system for marine vessels." Journal of the Acoustical Society of America 108, no. 3 (2000): 883. http://dx.doi.org/10.1121/1.1319407.

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22

Lombardo, Mario. "Sound producing vehicle exhaust system." Journal of the Acoustical Society of America 123, no. 2 (2008): 592. http://dx.doi.org/10.1121/1.2857696.

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23

Geskes, Peter, and Thomas Strauss. "The exhaust heat management system." MTZ worldwide 67, no. 10 (October 2006): 10–12. http://dx.doi.org/10.1007/bf03227875.

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24

Boiarshinov, M. G., and N. I. Kuznetsov. "Vehicle speed influence on exhaust system surface temperature." Russian Automobile and Highway Industry Journal 18, no. 2 (May 20, 2021): 192–202. http://dx.doi.org/10.26518/2071-7296-2021-18-2-192-202.

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Introduction. The reasons for the formation of an increased amount of condensate in the exhaust system of a car at a low ambient temperature are considered. Since the speed of the vehicle is one of the factors that determine the heating of the exhaust system and the formation of condensation, an experimental study was carried out to determine the temperature of the elements of the exhaust system at various vehicle speeds.The purpose of this study: to establish the features of the temperature change of individual elements of the exhaust system, depending on time at different vehicle speedsMaterials and methods. The sequence of the experimental study consisted of starting the “cold” engine, accelerating the car and then moving the car at a constant speed for 20 minutes. Simultaneously with the start of the engine, the temperature of the elements of the exhaust system was recorded. In this study, thermocouples were used to measure the surface temperature of the exhaust system. Experimental studies were carried out on a Toyota Camry with a gasoline engine in the climatic conditions of the Perm Territory.Results. The dependences of the temperature of the exhaust system elements on time were obtained at different speeds. In an experimental study, it was found that the temperature of the elements of the exhaust system is established within 8-12 minutes from the start of the vehicle at a constant speed; the rear muffler has the least surface heating, and therefore the greatest probability of the formation and accumulation of condensate.Discussion and conclusion. The analysis of the peculiarities of the change in the temperature of the exhaust system during the movement of the vehicle in conditions of low ambient temperature is carried out. The established patterns can be used to obtain information on the processes of condensate accumulation in the exhaust system and are aimed at predicting the amount of condensate accumulation in the exhaust system; to develop new solutions to ensure reliable operation of the exhaust system.

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Kwon, Yong-Il. "A Study on the Ventilation Efficiency Improved by Airflow Characteristics of the Axial Fan Installed in Parallel at the Side Wall of the Narrow Exhaust Tower." International Journal of Air-Conditioning and Refrigeration 24, no. 04 (December 2016): 1650026. http://dx.doi.org/10.1142/s2010132516500267.

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A numerical study has been conducted to simulate airflow and ventilation characteristics in the exhaust tower installed to ventilation of the multi-story underground parking lot. It is the objective of the present study to identify ventilation problems and to suggest the flow direction modifications of the ventilation system with the axial fan to improve ventilation efficiency in the low-rise section of the exhaust tower. Numerical results on SVE4 (scale of ventilation efficiency NO.4) and local mean age of exhaust ports are presented along with the location of axial fan on the direction of swirl flow and the dimension of exhaust tower. Ventilation system modifications on the direction of swirl flow have been suggested from the numerical results in order to prevent the flow interference by airflow discharged from the adjacent stories. The overall ventilation efficiency according to the rotational condition of the axial fans are compared quantitatively using the concept of SVE4 calculated by means of tracer gas pulse method to investigate distribution characteristics of the air discharged from each story among the exhausted air to the two exhaust ports in the narrow exhaust tower.

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Mui, KW, LT Wong, HC Yu, CT Cheung, and N. Li. "Exhaust ventilation performance in residential washrooms for bioaerosol particle removal after water closet flushing." Building Services Engineering Research and Technology 38, no. 1 (July 28, 2016): 32–46. http://dx.doi.org/10.1177/0143624416660597.

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Potential bioaerosol infection risk associated with toilet flushing has not been sufficiently addressed in the design of residential washroom exhaust system. This study evaluates the performance of exhaust ventilation for residential washrooms in terms of air change rate, washroom size, washroom geometry, and locations of door louver, exhaust and water closet. Three bioaerosol species namely Escherichia coli (ATCC 10536), Serratia marcescens (ATCC 6911), and Cladosporium cladosporioides (ATCC 16022) are included in the simulations. By shortening the distance between the locations of exhaust and emission source (i.e. water closet), the fractional counts of bioaerosol particles exhausted can be increased. An increased air change rate and a louvered door can also improve the exhaust ventilation performance, yet with a longer time to steady state. This study should provide a useful source of reference for washroom exhaust designers to minimize bioaerosol infection risk. Practical application: This paper shows for residential washroom with an exhaust fan installed, the ventilation performance can be improved by an increased air change rate, and by shortening the distance between the locations of exhaust and emission source.

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27

Shen, Xianqing, Kai Shen, and Zhendong Zhang. "Experimental study on the effect of high-pressure and low-pressure exhaust gas recirculation on gasoline engine and turbocharger." Advances in Mechanical Engineering 10, no. 11 (November 2018): 168781401880960. http://dx.doi.org/10.1177/1687814018809607.

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The effects of high-pressure and low-pressure exhaust gas recirculation on engine and turbocharger performance were investigated in a turbocharged gasoline direct injection engine. Some performances, such as engine combustion, fuel consumption, intake and exhaust, and turbocharger operating conditions, were compared at wide open throttle and partial load with the high-pressure and low-pressure exhaust gas recirculation systems. The reasons for these changes are analyzed. The results showed EGR system of gasoline engine could optimize the cylinder combustion, reduce pumping mean effective pressure and lower fuel consumption. Low-pressure exhaust gas recirculation system has higher thermal efficiency than high-pressure exhaust gas recirculation, especially on partial load condition. The main reasons are as follows: more exhaust energy is used by the turbocharger with low-pressure exhaust gas recirculation system, and the lower exhaust gas temperature of engine would optimize the combustion in cylinder.

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28

Cho, Sung-Woo. "A Study on the Availability of the Toilet Exhaust Port in Apartment Households for Smoke Exhaust." Fire Science and Engineering 36, no. 2 (April 30, 2022): 25–32. http://dx.doi.org/10.7731/kifse.b7fd71fc.

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This paper suggests a system to reduce suffocation casualties in apartment households by smoke exhaust using the toilet exhaust port adjacent to the outdoor. The opening/closing method of the fire damper attached to the existing systems takes the form “CLOSED” to prevent flame and smoke diffusion, but the method used in the proposed system is contradictory to this method. The results of the legal review of the smoke exhaust system depends on the conformance of the damper performance to legal requirements. Hence, the proposed system can be applied if the damper performance conforms to the legal requirements and the air velocity in the pipe shaft is within the legal velocity limit. However, the exhaust rate of the natural exhaust system must be considered.

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Zholobov, L. A., and Ye A. Suvorov. "Effect of lifting height of exhaust valve on the exhaust system." Traktory i sel hozmashiny 79, no. 8 (August 15, 2012): 22–25. http://dx.doi.org/10.17816/0321-4443-69458.

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30

Ki, Si-Woo, Kwang-Wook Youm, Jung-Ho Lee, and Seong-Hun Ham. "Experimental Study on Exhaust Gas Pressure Response Exhaust System with DPF." Journal of the Korean Institute of Gas 21, no. 1 (February 28, 2017): 80–86. http://dx.doi.org/10.7842/kigas.2017.21.1.80.

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31

Rakhmatov, R. I., G. G: Nadareishvili, and S. I. Yudin. "MODERN VEHICLE EXHAUST SYSTEM DESIGN DYNAMIC ANALYSIS." Akustika 32 (March 1, 2019): 351–54. http://dx.doi.org/10.36336/akustika201932351.

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The article considers the procedure and results of calculation of the natural (eigen) frequencies and waveforms (oscillation modes or forms) of modern vehicle exhaust systems. The maximum values of exhaust system vibratory displacements are calculated.

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Wang, Jie, Zhi En Liu, Jia Wei Zeng, and Chao Wang. "Development of Engine Exhaust Active Noise Control System." Advanced Materials Research 986-987 (July 2014): 1196–200. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1196.

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In order to enhance the capacity of elimination of engine exhaust low frequency noise, a set of engine exhaust active noise control system was developed. The system was developed by using MC9S12XS128 MCU, and it is based on the theory of sound wave interference. The system can realize the voice signal acquisition, reverse phase processing and output, and can eliminate engine exhaust low frequency noise. Experimental results showed that the system has good silencing effects on the engine exhaust noise under the steady state.

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Wang, Hao, Honghu Ji, and Haohao Lu. "The influence of nozzle deflection on fluid dynamic and infrared characteristics of a two-dimensional convergent–divergent vectoring exhaust system." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 12 (February 4, 2019): 4646–62. http://dx.doi.org/10.1177/0954410019827176.

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Superior maneuverability and good infrared stealthy properties are two key points of the future aircraft. A two-dimensional convergent–divergent (2D-CD) vectoring exhaust system can improve the maneuverability of aircrafts and has been widely applied to the latest generation aircrafts. Understanding fluid dynamic and infrared radiation characteristics of the 2D-CD vectoring exhaust systems under different conditions of the nozzle deflection is very crucial, which can provide significant information for the suppression of the infrared radiation property of the 2D-CD vectoring exhaust system. In this paper, by means of computational fluid dynamics, the fluid dynamic and infrared radiation characteristics of the 2D-CD vectoring exhaust system are studied at subsonic cruise status with nozzle deflection angles from 0 to 20°, and the results are compared with those of the baseline axisymmetric exhaust system. The results indicate that the fluid dynamic performance of a properly designed 2D-CD vectoring exhaust system is equivalent to the fluid dynamic performance of the baseline axisymmetric exhaust system. When the nozzle deflection angle is less than 5°, the mass flow and thrust force of the 2D-CD vectoring exhaust system are almost unchanged, and with the increase of the nozzle deflection angles, the mass flow and thrust force decrease rapidly. The thrust force deflection angles lag behind the nozzle deflection angles all the time, and as the nozzle deflection angle increases, the difference between them decreases. The direction of the maximum infrared radiation of the 2D-CD vectoring exhaust system deflects with the deflection of the nozzle, and the mean integrated infrared radiation intensity of the exhaust system decreases with the increase of nozzle deflection angles.

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Thu, HUYNH T. M., and Haruki SATO. "427 PROPOSAL OF A SMALL EXHAUST HEAT AIR CONDITIONING SYSTEM." Proceedings of the Symposium on Environmental Engineering 2011.21 (2011): 325–28. http://dx.doi.org/10.1299/jsmeenv.2011.21.325.

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35

Kang, Il-seok, and Sung-mo Yang. "The Effect of Back Pressure Change on Exhaust Emissions According to the Confluence Geometry of a Dual Exhaust System in Idling." Applied Sciences 12, no. 4 (February 11, 2022): 1855. http://dx.doi.org/10.3390/app12041855.

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In this study, a pressure transducer was installed in an exhaust system to analyze the effect of the change in back pressure according to the change of the confluence geometry of an exhaust pipe system on an exhaust emission. In addition, to perform exhaust gas measurement, the system was warmed up for about 40 s on the chassis dynamometer, and exhaust gas and back pressure measurements were performed simultaneously. In the back pressure measurement results, it was possible to confirm the difference in back pressure according to the change in the confluence shape. In addition, it was also confirmed that there was a clear difference in the exhaust emission measurement result. In particular, the H-type exhaust pipe system showed the highest pressure in the exhaust pipe due to the influence of the confluence geometry. Due to this influence, THC showed the highest measured value in the exhaust emission result. However, the X-type exhaust pipe system showed the lowest pressure due to the influence of the confluence geometry. Due to this influence, the THC showed the lowest measured value in the exhaust emission result. Therefore, through the conclusion of this study, an optimal exhaust system to reduce THC was proposed, and the importance of back pressure in exhaust system design was confirmed.

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Chen, Meng, and Li Sheng Jin. "Application of Nano-TiO₂ Photocatalysis Technology in Purification Exhaust." Advanced Materials Research 575 (October 2012): 64–69. http://dx.doi.org/10.4028/www.scientific.net/amr.575.64.

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The great development of transportation system has brought significant effect to the world environment, and people have paid more and more attention to the pollution of the exhausts from vehicles. In recent years, the photocatalytic technique of nanosized TiO2 has been a new technique in automobile exhaust treatment. Based on the mechanism of TiO2 photocatalytic reaction, the paper focus on in-engines and out-engines purification technique and applications about automobile exhaust. At last, limitations and the future development trend in practice is also discussed.

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Plotnikov, L. V., Yu M. Brodov, B. P. Zhilkin, L. E. Osipov, and K. O. Desyatov. "Spectral analysis of gas-dynamic characteristics of pulsing gas flows in the exhaust system of a piston engine." Power engineering: research, equipment, technology 24, no. 1 (May 24, 2022): 114–25. http://dx.doi.org/10.30724/1998-9903-2022-24-1-114-125.

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THE PURPOSE. To On the basis of spectral analysis, to evaluate the effect of installing a turbocharger turbine on the aeromechanics of pulsating gas flows in the engine exhaust system and to propose a method for controlling the aerodynamic and heat transfer characteristics of unsteady gas flows by creating an ejection effect in the exhaust system.METHODS. A laboratory experiment on a full-scale piston engine model was chosen to achieve this goal. Spectral analysis of harmonic dependences was used to assess changes in the structure of gas flows in the exhaust system. Mathematical modeling of the operating cycle of diesel engines was used to assess the potential positive effects of the use of an ejection system in the exhaust tract of a diesel engine. Three-dimensional solid modeling systems were used for sketch (engineering) studies of new (modernized) exhaust system designs.RESULTS. The article describes laboratory equipment, measuring system and data processing methods. A description of the boundary conditions in the course of experimental research is given. Comparison of aeromechanical and heat exchange characteristics of unsteady flows in the exhaust system of an engine with and without a turbocharger is carried out in the article. The qualitative and quantitative differences in aeromechanics and thermal physics of processes are shown. The proposed method of aeromechanical improvement of the exhaust system by creating an ejection.CONCLUSION. It was revealed that the turbine of a turbocharger has a significant effect on the aeromechanical characteristics of flows in the exhaust system. A significant decrease in the maximum flow rate in the exhaust tract (up to 3 times) is observed when installing a turbocharger. There is a decrease in flow characteristics through the turbocharged exhaust system (within 30%). It was found that the ejection effect in the engine exhaust system leads to stabilization of the flow, an increase in gas consumption by 6-12%, a decrease in specific fuel consumption by an average of 1% and an improvement in reliability indicators by 1.11-1.74%.

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Schaller, Christian, Florian Adlkofer, and Josef Biber. "FUEL SYSTEM, MECHANICAL-ASSEMBLY MOUNTINGS AND EXHAUST SYSTEM." ATZextra worldwide 15, no. 5 (June 2010): 46–49. http://dx.doi.org/10.1365/s40111-010-0199-6.

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Zhu, Rui, Jian Xing Ren, Fang Qin Li, Hong Du Zhang, and Yun Tang. "Thermal and Stress Field Analysis in Heavy-Duty Gas Turbine Exhaust System." Advanced Materials Research 516-517 (May 2012): 688–91. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.688.

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Heavy-duty gas turbine is used widely in power generation industry for many advantages. Gas turbine exhaust system is an important component of the gas turbine. The work to study the exhaust system was less in the past. In fact, structure design of the exhaust system has important influence on performance and life of the gas turbine. In this paper, the three-dimensional structural model of gas turbine exhaust system is built, the thermal field and stress field for the exhaust system are analyzed by using finite element method (FEM). The maximum stress and distribution characteristics of stress field, the highest temperature and distribution characteristics of thermal field in the exhaust system are computed. These provide a reliable basis for reasonable design and safety evaluation of the exhaust system in gas turbine.

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Naranng, Hitesh, Keshav Sharma, Donil Mehta, Smit Sheth, Smit Bhanderi, and Anand Patel. "Design and Fabrication of Exhaust System of Formula Student Car." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (June 30, 2022): 911–21. http://dx.doi.org/10.22214/ijraset.2022.43985.

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Abstract— The overall aim of this paper is to refine the design and manufacturing techniques of the exhaust system of FSAE cars. The main objective of this paper is selection of ideal geometry of the 4-cylinder engine (GSX R600) exhaust manifold in terms of optimization of back pressure and reduction in gross weight of the exhaust system. For achieving this, we have considered runner length and diameter, muffler diameter, flow of gases in the exhaust manifold, volumetric efficiency, etc. Softwares used in design and validation are Solid works, Ansys and GT Suite. Keywords— FSAE, Exhaust Runners, Collector, muffler, CFD, 1-D engine simulation, NRC

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Musabekov, Z., J. Khakimov, A. Yangiboev, N. Tairova, J. Usmonov, and A. Petruchenko. "Flow stabilization and pulsation in external channels in fuel engines." IOP Conference Series: Earth and Environmental Science 1142, no. 1 (March 1, 2023): 012022. http://dx.doi.org/10.1088/1755-1315/1142/1/012022.

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Abstract A turbocharger installed in the gas exchange system of a reciprocating internal combustion engine has a significant impact on the gas-dynamic and thermophysical characteristics of the exhaust process. When installing a turbocharger in a discharge system, there is the possibility of mitigating local pulsations of flow rate and pressure in the discharge pipe. The use of such an exhaust system increases the output capacity of the piston fuel engines outlet pipeline by approximately 20%, which also has a positive effect on the performance of individual systems and units such as the turbocompressor and exhaust manifold and reduces the temperature stress of the engine exhaust system and turbocompressor turbine elements.

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Liang, S. M., S. J. Tsai, and S. F. Wang. "An Effective Approach for Calculation of Exhaust Pipe Flows." Journal of Mechanics 25, no. 2 (June 2009): 177–88. http://dx.doi.org/10.1017/s172771910000263x.

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AbstractIn this study an effective numerical approach is proposed for calculation of exhaust pipe flows. The flow inside an exhaust pipe is very complicated, since that flow involves pulsating hot gases with blast waves discharged from an internal combustion engine. In order to accurately simulate the complicated pulsating flow with the effects of heat transfer and friction at the duct wall, two systems of quasi-onedimensional model equations are employed, which resulted from the governing equations of the mass, momentum and energy conservation. One system of model equations with the terms of heat loss and wall friction results from the dimensionless governing equations based on dimensionless time variable t1 where t1 is defined as the dimensional time divided by the ratio of the pipe length to the time-average flow velocity at the pipe inlet. This system of model equations is numerically solved for a steady exhausted gas-flow without blast waves. The computed steady flow is referred as a basic flow. The other system of model equations without the terms of heat loss and wall friction results from the dimensionless governing equations based on dimensionless time variable t2, where t2 is defined as the dimensional time divided by the ratio of the pipe length to the speed of sound at the pipe inlet. The latter model is used for predicting exhausted gas-flows with blast waves. These two systems of model equations are solved by a th-order weighted essential non-oscillation scheme. It is found that the computed result of the peak pressures, temperature, and flow velocity at some check points for an exhaust pipe at different engine speeds agrees reasonably well with experimental data.

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Wang, Yukun, Zhengwei Long, and Xiong Shen. "Influence of the purification system of machining factories on indoor air quality." E3S Web of Conferences 356 (2022): 04019. http://dx.doi.org/10.1051/e3sconf/202235604019.

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High-concentration oil mists from machining plant equipment can cause serious health problems for workers. The concentration of oil mist is generally reduced by ventilation and purification systems. However, the coupling relationship and interaction between purification and ventilation systems are not well understood. This study is based on an actual machining factory. First, the CFD simulation method was validated by the experimental data. Secondly, the influence of purifier exhaust air and exhaust air direction on oil mist distribution was studied. The results show that the influence of purifier exhaust air cannot be ignored in the prediction of oil mist concentration distribution. The difference in oil mist concentration and oil mist removal efficiency was 24% and 20%, respectively, with and without the purifier exhaust. Compared with the vertical exhaust direction of the purifier, the purifier with horizontal exhaust has fewer areas with higher oil mist concentrations. However, for the oil mist concentration at 1.5 m above the floor, the vertical exhaust air of the purifier is 0.1 mg/m3 lower than the horizontal exhaust air, and the removal efficiency is increased by 6.9%

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Wang, Yukun, Zhengwei Long, and Xiong Shen. "Influence of the purification system of machining factories on indoor air quality." E3S Web of Conferences 356 (2022): 05058. http://dx.doi.org/10.1051/e3sconf/202235605058.

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High-concentration oil mists from machining plant equipment can cause serious health problems for workers. The concentration of oil mist is generally reduced by ventilation and purification systems. However, the coupling relationship and interaction between purification and ventilation systems are not well understood. This study is based on an actual machining factory. First, the CFD simulation method was validated by the experimental data. Secondly, the influence of purifier exhaust air and exhaust air direction on oil mist distribution was studied. The results show that the influence of purifier exhaust air cannot be ignored in the prediction of oil mist concentration distribution. The difference in oil mist concentration and oil mist removal efficiency was 24% and 20%, respectively, with and without the purifier exhaust. Compared with the vertical exhaust direction of the purifier, the purifier with horizontal exhaust has fewer areas with higher oil mist concentrations. However, for the oil mist concentration at 1.5 m above the floor, the vertical exhaust air of the purifier is 0.1 mg/m3 lower than the horizontal exhaust air, and the removal efficiency is increased by 6.9%

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Rakhmatov, R. I., V. E. Krutolapov, G. G. Nadareishvili, and I. V. Malkin. "Development of calculation procedure for research and refinement of suspended design natural frequencies by example of vehicle exhaust system." Journal of Physics: Conference Series 2061, no. 1 (October 1, 2021): 012139. http://dx.doi.org/10.1088/1742-6596/2061/1/012139.

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Abstract The article presents a finite element model exhaust system developed in the ANSA software package. Experimental research of the dynamic characteristics mounts exhaust system. and developed calculation procedure for improvement of the suspended design natural frequencies based on the experimental definition of boundary conditions by the example of the vehicle exhaust system. Requirements for natural frequencies of the exhaust system are developed; finite element models of the exhaust system are developed; physical and mechanical characteristics of mounts are defined; natural frequencies and oscillation modes of the exhaust system taking into account physical and mechanical characteristics of mounts are calculated.

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Cao, Xiu Zhong. "Juice Extractor Stent Plastic Mould Structure Design." Applied Mechanics and Materials 214 (November 2012): 173–76. http://dx.doi.org/10.4028/www.scientific.net/amm.214.173.

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The design of plastic parts structure analysis, confirmed the mould adopts the exactly two cavities, with two points type surface, three board type injection molds. Exhaust systems use the parting surface and lateral slide block clearance, plunger, cooperate with clearance to exhaust, and using a runner filling mold overall layout form. In the mold design process, the design of classification, gating system, exhaust system, cooling system, demoulding mechanism, are introduced in this paper.

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Arifin, Ilham Zainul, Wirawan Wirawan, and Hari Rarindo. "The Effect of Sodium Hydroxide Absorbent on The Exhaust Emissions From Internal Combustion Engine." Logic : Jurnal Rancang Bangun dan Teknologi 22, no. 1 (March 30, 2022): 27–34. http://dx.doi.org/10.31940/logic.v22i1.27-34.

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Exhaust emissions are the residue from burning fuel which can cause air pollution. To overcome this problem, it is necessary to design a system for reducing exhaust emissions of internal combustion engine. This study aims to determine the effect of absorbent concentration on the exhaust emission from internal combustion engine. The research was carried out in 2 stages, namely designing a system for reducing exhaust emissions from internal combustion engines and processing exhaust emissions by channeling exhaust emissions into an exhaust emission reduction system. The internal combustion engine used pertalite. The exhaust emissions consisted of CO, CO2 and HC. The absorbent concentrations were 0.05 M, 0.1 M and 0.15 M. The engine speeds were 800, 1000, 1500 and 2000 rpm. The paired-t test showed that the exhaust emission reduction system in this study can reduce exhaust emission. The one-way Anova test resulted the absorbent concentration affect the exhaust gas emissions, both CO, CO2 and HC which are expressed in the efficiency of reducing exhaust emission.. The greatest efficiency in reducing exhaust emission is CO2 of 67.95%. The lowest efficiency of reducing exhaust emission is CO, which is 46.92%, while the efficiency of reducing HC emission is 62.47%.

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Li, Teng Fei, Hui Xia Liu, and Yi Xue Mao. "Taguchi Robust Design of Exhaust System Based on the Parametrically Process of Parts Location." Key Engineering Materials 579-580 (September 2013): 894–900. http://dx.doi.org/10.4028/www.scientific.net/kem.579-580.894.

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Due to the change of car-body design, the location of exhaust systems hanger is uncertain and always fluctuates around the initial design position. So the Taguchi method is introduced to conduct exhaust systems optimal design. Firstly, the parameterization of hanger location under the grid environment was realized by combining NastranHypermesh and Isight. Then, the Taguchi robust design of the exhaust system is performed taking the hanger location as noise factors and the stiffness of hanger shock absorber as control factors. As a result, modal property and robustness of the exhaust system are improved. At last, the results of Taguchi robust design and traditional sensitivity optimization design based on the finite element method are compared, which reveals the advantage of Taguchi robust design in improving product quality.

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Huang, Pei-Hsing, Jenn-Kun Kuo, Te-Hua Fang, and Wei-ren Wu. "Numerical simulation and design of casting system for stainless steel exhaust manifold." MATEC Web of Conferences 185 (2018): 00008. http://dx.doi.org/10.1051/matecconf/201818500008.

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During operation, exhaust manifolds must bear the corrosion of high temperatures and repeated stress, which can easily lead to cavitation, corrosion, and creeping damage in the casting structure and affect product safety. To improve the structure of exhaust manifolds and increase their service life, we employed AnyCasting mold flow analysis to SUS304 stainless steel exhaust manifolds. We examined the influence of casting system design and process parameters such as ceramic shell temperature, casting temperature, and pouring speed on the filling and solidification processes of the liquid metal. Finally, we used the Niyama criterion to predict the probability and distribution of shrinkage porosity defects in the exhaust manifold and made improvements to enhance the quality of exhaust manifold castings. Keywords: exhaust manifold, mold flow analysis, casting system.

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Minami, Hiroki. "Next Generation Exhaust Heat Recovery System." Journal of The Japan Institute of Marine Engineering 50, no. 3 (2015): 297–300. http://dx.doi.org/10.5988/jime.50.297.

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Journal articles on the topic 'Exhaust system'

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