Combustion and Particulate Emission of Dual Injection Gasoline Engine under Cold Start and Warm-up Conditions

XIA Chun; ZHAO Tingyu; FANG Junhua; ZHU Lei; HUANG Zhen

Vehicle Engine ›› 2021, Vol. 0 ›› Issue (5) : 1-7.

XIA Chun,ZHAO Tingyu,FANG Junhua,ZHU Lei,HUANG Zhen

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Abstract

The experimental research was conducted to analyze the effects of coolant temperature and injection mode on combustion and particulate emission under the cold start and warmup conditions. The test results show that the low coolant temperature and direct injection mode can decrease the in-cylinder combustion pressure. The combustion duration changes with coolant temperature differently under the direct injection mode and the dual injection mode respectively. Both the dual injection mode and increasing the coolant temperature are the effective methods of reducing PN emission, which can reduce the oxidation activation energy of particulate matter. With the increase of coolant temperature under the cold start and warm-up conditions, the optimized injection control strategy can keep engine in a state of low particulate emission, which is beneficial to the oxidation of particulates.

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/ mso-hansi-font-family: 宋体">dual injection;gasoline engine;particulate;thermogravimetric analysis

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XIA Chun,ZHAO Tingyu,FANG Junhua,ZHU Lei,HUANG Zhen. Combustion and Particulate Emission of Dual Injection Gasoline Engine under Cold Start and Warm-up Conditions[J]. Vehicle Engine. 2021, 0(5): 1-7