Effects of fuel combination and IVO timing on combustion and emissions of a dual-fuel HCCI combustion engine

2020年第14卷第4期

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《能源前沿（英文）》 >> 2020年第14卷第4期 doi: 10.1007/s11708-020-0698-8

Effects of fuel combination and IVO timing on combustion and emissions of a dual-fuel HCCI combustion engine

Key Laboratory for Power Machinery and Engineering of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China

录用日期： 2020-09-25 发布日期： 2020-09-25

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摘要

This paper experimentally and numerically studied the effects of fuel combination and intake valve opening (IVO) timing on combustion and emissions of an n-heptane and gasoline dual-fuel homogeneous charge compression ignition (HCCI) engine. By changing the gasoline fraction (GF) from 0.1 to 0.5 and the IVO timing from –15°CA ATDC to 35°CA ATDC, the in-cylinder pressure traces, heat release behaviors, and HC and CO emissions were investigated. The results showed that both the increased GF and the retarded IVO timing delay the combustion phasing, lengthen the combustion duration, and decrease the peak heat release rate and the maximum average combustion temperature, whereas the IVO timing has a more obvious influence on combustion than GF. HC and CO emissions are decreased with reduced GF, advanced IVO timing and increased operational load.

关键词

homogeneous charge compression ignition ; dual-fuel ; n-heptane ; gasoline ; intake valve opening timing