Stratified lean combustion characteristics of a spray-guided combustion system in a gasoline direct injection engine

CATEGORY: ADVANCED ENGINES
Energy, Volume 41, Issue 1, May 2012, Pages 401–407
23rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2010
Stratified lean combustion characteristics of a spray-guided combustion system in a gasoline direct injection engine
Cheolwoong Park a, Sungdae Kim a, Hongsuk Kim a, Yasuo Moriyoshi b
a Department of Engine Research, Environmental and Energy Systems Research Division, Korea Institute of Machinery and Materials (KIMM), Republic of Korea
b Graduate School of Engineering, Chiba University, Japan
Abstract
Gasoline direct injection (GDI) systems have higher power and fuel efficiency than multi-point injection (MPI) systems. Because intake air is cooled by fuel evaporation, the direct injection of fuel into the combustion chamber leads to improved fuel economy. The process improves knock resistance and volume efficiency, as well. Spray-guided direct injection (DI) combustion systems also allow stratified lean combustion operation due to their ability to eliminate wall-wetting and form ignitable stratified mixtures near spark plugs.
Authors report results of a study of a spray-guided combustion system with a piezo-type gasoline direct injector. The goal was to determine its applicability to stratified lean combustion engines.
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