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| Effects of Spark Assisted HCCI on Combustion and Emissions in Multicylinder Gasoline Engine |
| ZHENG Hua-Hang-1, ZHANG Xu-Zhou-1, LI Zhong-Zhao-1, SHEN Yi-Tao-2, ZHANG Jian-Yong-2, FANG Jun-Hua-1, 吕Xing-Cai-1 , HUANG Zhen-1 |
| （1. Key Laboratory for Power Machinery and Engineering of Ministry of Education,Shanghai Jiaotong University, Shanghai 200240, China；2. Shanghai Automotive Industry Corporation (Group), Shanghai 201805, China） |
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Abstract Applying optimized kinetic process technology the waste thermal energy in the coolant and exhaust gases for intake air heating was used to realize HCCI combustion in a multicylinder gasoline engine. The effects of spark assisted HCCI on combustion and emissions were investigated. The results show that utilization of spark assisted HCCI is found to increase indicated mean effective pressure (IMEP), pmax, (dp/dθ)max and reduce cyclebycycle variation so as to improve the stability of HCCI combustion. Spark assisted HCCI can achieve a twostage combustion. When increasing the spark advance angle, the heat release rate peak value will increase. The introduction of spark significantly advances the combustion to top dead center (TDC) and lowers the NOx and HC emissions.
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Received: 29 August 2011
Published: 28 May 2012
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