Influence of Exhaust Gas Recirculation on Low-Load Diesel Engine Performance

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外文摘要：In the condition of constant speed and light load,an experimental study of a turbocharged and intercooled diesel engine with exhaust gas recirculation (EGR) system focuses on the influence of different EGR rates on combustion process,dynamic performance,economic performance and emission performance of a diesel engine.With the increase of EGR rate,the oxygen concentration of the intake-side decreases,the fuel air equivalence ratio increases,and the maximum explosion pressure in the cylinder decreases.Meanwhile,the average temperature in the cylinder drops,the ignition delay is prolonged,the ignition timing delays,and the maximum heat release rate decreases.The increase of EGR rate makes NOx emissions decrease obviously and continue to decline.When EGR is low,the smoke rate enlarges slowly with the increase of EGR rate,and enlarges greatly at the rate higher than 43％ and reaches the maximum at the rate of 57％.When EGR rate is higher than 61％,the smoke rate drops rapidly,and the content of CO and hydrocarbon (HC) increases rapidly with high EGR rate.

外文关键词：

exhaust gas recirculation (EGR)diesel engineperformance

作者：

CHENG Wenming、LI Xianghu、YI Xing

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作者单位：

School of Automotive Engineering,Jiangxi University of Technology,Nanchang 330098,Jiangxi,China

School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,Jiangxi,China

基金：

Supported by the Major Plan Projects of Science and Technology of Jiangxi Provincial Department of EducationYouth Science Fund Project Science and Technology of Jiangxi Provincial Department of Science and Technologyand the Plan Projects of Science and Technology of Jiangxi Provincial Department of Science and Technology

项目编号：

GJJ15114520114BAB2160022016BBE50074

出版年：

2017

DOI：

10.1007/s11859-017-1270-1

武汉大学自然科学学报(英文版)

武汉大学

武汉大学自然科学学报(英文版)

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影响因子：0.066

ISSN：1007-1202

年,卷(期)：2017.22(5)

参考文献量3