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Experimental study of stratified lean burn characteristics on a dual injection gasoline engine

Frontiers in Energy 2022年第6期16卷 900-915页

作者： Chun XIA Tingyu ZHAO Junhua FANG Lei ZHU Zhen HUANG Key laboratory of Power Machinery and engineering Shanghai Jiao Tong UniversityShanghai 200240China

Due to increasingly stringent fuel consumption and emission regulation,improving thermal efficiency and reducing particulate matter emissions are two main issues for next generation gasoline *** burn mode could greatly reduce pumping loss and decrease the fuel consumption of gasoline engines,although the burning rate is decreased by higher diluted intake *** this study,dual injection stratified combustion mode is used to accelerate the burning rate of lean burn by increasing the fuel concentration near the spark *** effects of engine control parameters such as the excess air coefficient(Lambda),direct injection(DI)ratio,spark interval with DI,and DI timing on combustion,fuel consumption,gaseous emissions,and particulate emissions of a dual injection gasoline engine are *** is shown that the lean burn limit can be extended to Lambda=1.8 with a low compression ratio of 10,while the fuel consumption can be obviously improved at Lambda=*** exists a spark window for dual injection stratified lean burn mode,in which the spark timing has a weak effect on *** optimization of the control parameters,the brake specific fuel consumption(BSFC)decreases 9.05%more than that of original stoichiometric combustion with DI as 2 bar brake mean effective pressure(BMEP)at a 2000 r/min engine *** NO_(x) emissions before threeway catalyst(TWC)are 71.31%lower than that of the original engine while the particle number(PN)is 81.45%lower than the original *** dual injection stratified lean burn has a wide range of applications which can effectively reduce fuel consumption and particulate *** BSFC reduction rate is higher than 5%and the PN reduction rate is more than 50%with the speed lower than 2400 r/min and the load lower than 5 bar.

关键词： dual injection stratified lean burn gasoline engine particulate matter emission combustion analysis

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Characterization of Particle Emissions of Turbocharged Direct Injection gasoline engine in Transients and Hot Start Conditions

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Journal of Thermal Science 2021年第6期30卷 2056-2070页

作者： Vincent BERTHOME David CHALET Jean-François HETET Ecole Centrale de Nantes LHEEA Lab.(ECN/CNRS)Nantes 44300France

Reducing pollutant emissions,particularly soot particles emitted by internal combustion engines,is a major challenge for car *** this paper,the experimental setup is a turbocharged three-cylinders gasoline direct injection engine installed on a HORIBA dynamic test driven by a HORIBA STARS *** particle-measuring device is a Pegasor Particles Sensor that measures the current carried by previously electrically charged *** hot engine stabilized tests,with lambda parameter lower or equal to one,have very low emission levels,unlike dynamic *** a consequence,the present paper deals with experiments in transient *** diesel engine,cycle tests show that particulate emissions vary *** understand the phenomenon,a simple transient was created and reproduced a hundred times in order to obtain enough data to analyze and compare these different *** transient starts from idle to reach the speed of 2000 r/min and 60 N·m in 5 *** reach this point,it is necessary to stay in full load for about 3 *** maximum deviations of particles reaches 85%with the standard deviationσ=18%.The cylinder pressure sensor shows significant variations at the very beginning of each transient,i.e.,during the first 500 *** kind of result was observed for Worldwide harmonized Light vehicles Test Cycles(WLTC)with a maximum deviations of particles reaching 75%withσ=30%,on Real Drive Emissions Cycle(RDE)with a maximum deviations of particles reaching 45%withσ=22%and for a 300 s Mini-Cycle with a maximum deviations of particles reaching 70%withσ=17%.The Mini-cycle is made up of the five largest accelerations of the WLTP cycle.A complete analysis highlights the importance of filling the first engine *** depends on the opening speed of the throttle,the position of the crankshaft at the beginning of the transient,and the acceleration of the first ***,the NO_(x) sensor shows very slight variations between each *** a consequence,i

关键词： particles gasoline engine cycle-to-cycle variations transients oil consumption

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Effects of working parameters on gasoline engine exergy balance

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Journal of Central South University 2013年第7期20卷 1938-1946页

作者： LIU Jing-ping FU Jian-qin FENG Ren-hua ZHU Guo-hui Research Center for Advanced Powertrain Technology Hunan University Changsha 410082 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body (Hunan University) Changsha 410082 China

To improve the energy utilization efficiency of internal combustion （IC） engine, exergy analysis was conducted on a passenger car gasoline engine. According to the thermodynamic theory of IC engine, in-cylinder exergy balance model was built. The working processes of gasoline engine were simulated by using the GT-power. In this way, the required parameters were calculated and then gasoline engine exergy balance was obtained by programming on computer. On this basis, the influences of various parameters on exergy balance were analyzed. Results show that, the proportions of various forms of exergy in gasoline engine from high to low are irreversible loss, effective work, exhaust gas exergy and heat transfer exergy. Effective exergy proportion fluctuates with cylinder volumetric efficiency at full load, while it always increases with break mean effective pressure （BMEP） at part load. Exhaust gas exergy proportion is more sensitive to speed, and it increases with speed increasing except at the highest speed. The lower proportion of heat transfer exergy appears at high speed and high load. Irreversible loss is mainly influenced by load. At part load, higher BMEP results in lower proportion of irreversible loss; at full load, the proportion of irreversible loss changes little except at the highest speed.

关键词： gasoline engine exergy balance waste heat recovery thermal efficiency energy conservation

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STUDY ON INJECTION AND IGNITION CONTROL OF gasoline engine BASED ON BP NEURAL NETWORK

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Chinese Journal of Mechanical engineering 2003年第4期16卷 441-444页

作者： Zhang Cuiping Yang QingfoCollege of Mechanical engineering,Taiyuan University of Technology,Taiyuan 030024, China College of Mechanical engineering Taiyuan University of Technology Taiyuan 030024

According to advantages of neural network and characteristics of operatingprocedures of engine, a new strategy is represented on the control of fuel injection and ignitiontiming of gasoline engine based on improved BP network algorithm. The optimum ignition advance angleand fuel injection pulse band of engine under different speed and load are tested for the samplestraining network, focusing on the study of the design method and procedure of BP neural network inengine injection and ignition control. The results show that artificial neural network technique canmeet the requirement of engine injection and ignition control. The method is feasible for improvingpower performance, economy and emission performances of gasoline engine.

关键词： Neural network BP algorithm gasoline engine Control

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Estimation of Residual Exhaust Gas of Homogeneous Charge Compression Ignition gasoline engine Operating Under Negative Valve Overlap Strategy

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Automotive Innovation 2019年第1期2卷 45-54页

作者： Huanchun Gong College of engineering Yanjing Institute of TechnologyLangfang 065201China

To meet the requirements of the homogeneous charge compression ignition gasoline engine’s rapid cylinder exhaust gas rate and accurate control of combustion phasing,a residual exhaust gas rate model was proposed.A heat dissipation model for gas flow in the exhaust passage and exhaust pipe was established,and the exhaust gas was *** through the exhaust valve was considered as an adiabatic expansion process,the exhaust temperature was used to estimate the temperature in the cylinder at the time that the valve was closed,and the cylinder exhaust gas rate was *** meet the requirements of transient operating conditions,a first-order inertial link was used to correct the thermocouple temperature *** this delay problem and modification of the exhaust wall temperature according to different conditions effectively improved the accuracy of the *** relative error between the calculated results of this model and the simulation results determined using GT-POWER software was within 3.5%.

关键词： Residual exhaust gas Negative valve overlap angle Homogeneous charge compression ignition gasoline engine Numerical estimation

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Turbocharging the DA465 gasoline engine

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Journal of Marine Science and Application 2008年第2期7卷 111-115页

作者：张鹏奇宗立军王银燕 College of Power and Energy engineering Harbin Engineering University Harbin 150001 China Harbin Hafei Automobile Industry Group Co. Ltd. Harbin Dongan Engine Group Harbin 150001 China

In order to improve performance of the DA465Q gasoline engine, a substantial amount of research was done to optimize its turbocharging system. The research led to the GT12 turbocharger being selected and its turbocharging parameters being settled. Based on these tests, rational matching was worked out for respective components of the turbocharging system. Results show that this turbocharger allows the engine to easily meet the proposed requirements for power and economic performance, giving insight into further performance improvements for gasoline engines.

关键词： turbocharging gasoline engine turbocharging system turbocharger

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The gasoline engine Starting Strategy Based on Air-Fuel Ratio Control

The Gasoline Engine Starting Strategy Based on Air-Fuel Rati...

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2014中国汽车工程学会年会

作者： Chen Zhongtian Wang Kai Shen Chen Xu Feng Qin Long Zheng Jianbo Lei Xue Zhang Fanwu Technology Center Dongfeng Motor Corporation

ISBN: (纸本)9783662450420

During the engine starting process,the speed always gets up and back to idle speed slowly,in order to solve these problems,at the same time to control the combustion during the starting process more accurately,a gasoline engine starting strategy based on air-fuel ratio control is developed,including intake airflow control,air-fuel ratio control and so *** selecting the appropriate air flow and air-fuel ratio,the fuel injection amount is calculated,and the test results show that the engine can start up quickly and reliably,and the starting speed will have a smooth transition to target idle speed.

关键词： gasoline engine start intake airflow A/F ratio

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Experimental and Simulated Study on the Cylinder Deactivation of Vehicle gasoline engine 1

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2016中国汽车工程学会年会暨展览会

作者： Yu Shuhai Ma Xingxing Ma Zhigang LiuRui Song Dongxian Technical Center Great Wall Motor Co.Ltd. Hebei Automobile engineering Technology & Research Center

ISBN: (数字)9789811035272

ISBN: (纸本)9789811035265;9789811098963

Cylinder deactivation performance in vehicle gasoline engine is investigated by experimental and simulated methods,this technology is implemented by adjusting the valve system,and furthermore,a simulated model is built in GT- *** results show that,in cylinder deactivation mode,the overlap degree of naturally aspirated and effective region is highly,it can be considered that the cylinder deactivation engine just operates in naturally aspirated *** 2bar@2000rpm,BSFC of cylinder deactivation is 312.7g/kW · h,the fuel efficiency is improved 12.6% than normal *** the reduced engine speed,fuel effieiceny becomes better,however,with the increment speed,engine NVH characteristic has been deteriorated.

关键词： cylinder deactivation gasoline engine fuel efficiency torsional fluctuation simulated study

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Fuzzy Control Method for gasoline engine Idle Speed Control

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Journal of Beijing Institute of Technology 2000年第4期9卷 408-414页

作者：张付军黄英甘海云葛蕴珊孙业保北京理工大学车辆与交通工程学院北京100081

In order to improve the steady and dynamic characteristic of the idle speed control and study the performance of the fuzzy control method for the idle speed control, a fuzzy control system is developed to control the idle speed of gasoline engine. The construction and working principle of the fuzzy controller are described, and the design procedure of the fuzzy controller is given in detail. The control parameters are determined by computer simulation. The simulation and experiments on the engine test bench show that the idle speed is controlled accurately both in stationary and in dynamic states, and the fuzzy control method is robust to the changes of engine parameters.

关键词： gasoline engine idle speed fuzzy contro

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MULTI-STEP PREDICTIVE MODEL OF AIR FUEL RATIO FOR gasoline engine BASED ON NEURAL NETWORK

MULTI-STEP PREDICTIVE MODEL OF AIR FUEL RATIO FOR GASOLINE E...

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2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： HOU Zhixiang, WU Yihu College of Automobile and Mechanical engineering, Changsha University of Science and Technology, Changsha 410076, China

Air fuel ratio is a key index affecting the emission of gasoline engine. A multi-step predictive model of air fuel ratio based on neural network was provided in this paper to overcome air fuel ratio t

关键词： gasoline engine transient condition air fuel ratio neural networks multi-step prediction.

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