Comparison of in-cylinder combustion and heat-work conversion processes of vehicle engine under transient and steady-state conditions

作者: Zhengxin Xu , Jianqin Fu , Jingping Liu , Zhipeng Yuan , Jun Shu

DOI: 10.1016/J.ENCONMAN.2016.11.038

关键词:

摘要: Abstract To improve the actual performance of internal combustion engine (ICE), transient behaviors in-cylinder and heat-work conversion processes ICE were investigated an optimization method was proposed. Based on advanced turbocharged gasoline direct injection (TGDI) engine, steady-state bench test, load-step test at constant-speed vehicle road carried out. On this basis, under driving conditions compared with results. By means, deviations from their values demonstrated also impacts revealed. The research results show that there is a satisfactory consistency especially ignition advance angle conditions. However, conditions, operating control parameters gravely deviate large fluctuations, e.g., retarded largely sharp deceleration When IMEP below 4 bar, seriously deviates values, which in fluctuation characteristic finally leads to decrease efficiency. Moreover, excess air coefficient one main reasons for instability performance. accurately timing low load effective way

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