Research on Performance of LP-EGR System Fitted for Hybrid-Engine

In this paper, a 1.5L turbocharged DI gasoline Hybrid-engine is taken as the research object, and the effects of LP-EGR system on fuel consumption and combustion are analyzed through experiments. The LP-EGR system taking the air behind the catalytic converter can achieve an EGR rate of 28% in the low fuel consumption area. Combustion stability is the reason that restricts the further increase of EGR rate. With the increase of load, the maximum EGR rate decreased gradually and the effect of EGR on fuel consumption reduction is more obvious. In addition, the advance amount of AI50 basically remained unchanged, while the extension amount of combustion duration gradually decreased, and EGR rate had little influence on combustion duration at high load.