Effects of Pilot Injection Strategy on Combustion and Emission Characteristics in Gasoline Compression Ignition. (December 2017)

• Record Type: Journal Article
• Authors: Liu, Jialin; Wang, Hu; Zheng, Zunqing; Mao, Bin; Li, Linpeng; Yao, Mingfa
• Is Part Of: Energy procedia. Volume 142(2017)
• Page Start: 1267
• Page End: 1273
• Publication Date: 2017-12
• Subjects: Gasoline compression ignition -- Pilot injection -- Diesel engine -- Combustion -- Emission; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.12.484
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: In this paper, the effects of pilot injection strategies, including various pilot injection timings and masses, on the combustion and emission characteristics of gasoline compression ignition are investigated in a multi-cylinder heavy duty diesel engine with the aim of reducing peak pressure rise rate while improving thermal efficiency and exhaust emissions. The results show that the HRRPI, max (peak heat release rate of pilot injection) becomes more sensitive to the change of pilot-main interval as the pilot injection mass increases, and the sensitivity of HRRPI, max to the change of pilot injection mass increases with the reduction of pilot-main interval. PHRRMI, max (peak premixed heat release rate of main injection) decreases with the decrease of pilot-main interval and the increase of pilot injection mass. The PRRmax (peak pressure rise rate) and soot emission can be improved by 60.2% and 42.3% respectively, while still maintaining similar BSFC with optimized pilot injection strategy compared to single injection.