Effect of Injection Pressure on Spray Characteristics of Gasoline Direct Injection Engine

QIAN Dingchao; DUAN Jiaquan; LIU Yaodong; WANG Zhenxi; CHEN Haie; GONG Yanfeng

doi:10.3969/j.issn.1001-2222.2018.04.013

Vehicle Engine ›› 2018, Vol. 0 ›› Issue (4) : 65-72. DOI: 10.3969/j.issn.1001-2222.2018.04.013

Effect of Injection Pressure on Spray Characteristics of Gasoline Direct Injection Engine

QIAN Dingchao，DUAN Jiaquan，LIU Yaodong，WANG Zhenxi，CHEN Haie，GONG Yanfeng

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Abstract

Injection pressure had a direct influence on the mixture formation, and the higher injection pressure could reduce particulate emissions. Two kinds of spray simulation models were built using STARCD including the constant volume model and the engine incylinder fuel spray model. The spray model was effectively verified by the spray characteristics visualization test and the effects of injection pressure on spray penetration and Sauter mean diameter were further investigated. The result showed that the higher pressure was more beneficial to improve the fuel atomization and fuel evaporation. The mixture formation was hence accelerated and the distribution uniformity of mixing gas was finally improved.

Key words

gasoline direct injection engine / injection pressure / spray characteristics / mixture formation / numerical simulation

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QIAN Dingchao，DUAN Jiaquan，LIU Yaodong，WANG Zhenxi，CHEN Haie，GONG Yanfeng. Effect of Injection Pressure on Spray Characteristics of Gasoline Direct Injection Engine[J]. Vehicle Engine. 2018, 0(4): 65-72 https://doi.org/10.3969/j.issn.1001-2222.2018.04.013