Effect of Pre-Ignition Heat Release on Combustion Performance of GCI Engines

被引：0

作者：

Li X. ^{[1
]}

Pan J. ^{[1
]}

Liu F. ^{[1
]}

Wei H. ^{[1
]}

Liu C. ^{[1
]}

Shu G. ^{[1
]}

机构：

[1] State Key Laboratory of Engines, Tianjin University, Tianjin

来源：

Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2021年 / 39卷 / 06期

关键词：

Combustion phase; Gasoline compression ignition engines; Intake conditions; Octane sensitivity; Pre-ignition heat release;

D O I：

10.16236/j.cnki.nrjxb.202106062

中图分类号：

学科分类号：

摘要：

Gasoline compression ignition(GCI) engines have better combustion and emission performance when fueled with low-octane number(RON=60-80) fuels. However, low-octane number fuels with low-temperature reactions are manifested by the obvious pre-ignition heat release, which affects the ignition and combustion processes of GCI engines. In this work, a single-cylinder engine with high compression ratio and toluene primary reference fuels(TPRF) (RON=75) was employed, and the influence of injection timing, intake temperature, intake pressure and octane sensitivity on the pre-ignition heat release and thereby combustion performance of GCI engines were investigated. The results show that the pre-ignition release behavior occurs when the injection time is advanced to the crank angle of earlier than 90° CA. Elevating intake pressures and decreasing intake temperatures both can enhance low-temperature reactions and improve the magnitude of pre-ignition heat release. In the negative temperature coefficient region, increasing the intake temperatures can prolong the ignition delay period and slow the combustion phase. The decrease of octane sensitivity improves the low-temperature reactivity of fuels, which facilitates the advancement of pre-ignition heat release center and main combustion phase. © 2021, Editorial Office of the Transaction of CSICE. All right reserved.

引用

页码：481 / 487

页数：6

共 24 条

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