An experimental study of the combustion characteristics in SCCI and CAI based on direct-injection gasoline engine

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Experimental Thermal and Fluid Science

DOI:https://doi.org/10.1016/J.EXPTHERMFLUSCI.2006.12.003· OSTI ID:20919396

Lee, C H; Lee, K H ^[1]

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1. Department of Mechanical Engineering, Hanyang University, 1271, Sa1-dong, Ansan, Kyungki-do 425791 (Korea)

Emissions remain a critical issue affecting engine design and operation, while energy conservation is becoming increasingly important. One approach to favorably address these issues is to achieve homogeneous charge combustion and stratified charge combustion at lower peak temperatures with a variable compression ratio, a variable intake temperature and a trapped rate of the EGR using NVO (negative valve overlap). This experiment was attempted to investigate the origins of these lower temperature auto-ignition phenomena with SCCI and CAI using gasoline fuel. In case of SCCI, the combustion and emission characteristics of gasoline-fueled stratified-charge compression ignition (SCCI) engine according to intake temperature and compression ratio was examined. We investigated the effects of air-fuel ratio, residual EGR rate and injection timing on the CAI combustion area. In addition, the effect of injection timing on combustion factors such as the start of combustion, its duration and its heat release rate was also investigated. (author)

• OSTI ID: 20919396
• Journal Information: Experimental Thermal and Fluid Science, Journal Name: Experimental Thermal and Fluid Science Journal Issue: 8 Vol. 31; ISSN 0894-1777; ISSN ETFSEO
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AUTOIGNITION
COMBUSTION
COMPRESSION RATIO
DESIGN
DIRECT INJECTION ENGINES
EXHAUST GASES
FUEL-AIR RATIO
GASOLINE
OPERATION
STRATIFIED CHARGE ENGINES
TEMPERATURE DEPENDENCE
TIME DEPENDENCE