Study of the Effect of Spark Ignition on Gasoline HCCI Combustion

• Published in: Proceedings of the Institution of Mechanical Engineers. Part D, Journal of automobile engineering Vol. 220; no. 6; pp. 817 - 825
• Main Authors: Wang, Zhi, Wang, Jian-Xin, Shuai, Shi-Jin, Tian, Guo-Hong, An, Xinliang, Ma, Qing-Jun
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.06.2006; Professional Engineering; SAGE PUBLICATIONS, INC
• Subjects: Applied sciences; Engines; Engines and turbines; Exact sciences and technology; Gasoline; Internal combustion engines: gazoline engine, diesel engines, etc; Mechanical engineering; Mechanical engineering. Machine design; Mechanics; combustion; homogeneous charge compression ignition (HCCI); ignition control; spark ignition (SI); Spark ignition; Gasoline engine; Diesel engine; High temperature; Experimental study; High pressure; Heat source; Autoignition; Engine gasoline; Internal combustion engine; Direct injection
• ISSN: 0954-4070; 2041-2991
• DOI: 10.1243/09544070JAUTO151

Abstract Homogeneous charge compression ignition (HCCI) has challenges with regard to ignition control. A spark-assisted gasoline HCCI combustion strategy was used to control ignition of HCCI combustion. In this paper, the effects of spark ignition (SI) on HCCI combustion were investigated on a gasoline direct injection (GDI) engine. The experimental results show that SI improves the stability of HCCI combustion at HCCI critical status (HCCI-CS). At the transition from SI to HCCI mode, the transition fluctuations can be smoothed by the SI in SI/HCCI hybrid combustion engine. Local SI can trigger entire HCCI in the cylinder at sub-HCCI-CS. Without SI, misfire occurs at sub-HCCI-CS. The reason is that local high temperature and pressure owing to local heat release from the spark electrode leads to increase of temperature and pressure in the entire cylinder. When the temperature and concentration of mixture are below sub-HCCI-CS, SI has little effect on HCCI ignition.