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Fuel Stratification Effects of LPG-DME Compression Ignition Engine  

Yeom, Ki-Tae (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Bae, Choong-Sik (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.16, no.1, 2008 , pp. 78-85 More about this Journal
Abstract
The exhaust emission characteristics of a liquefied petroleum gas-di-methyl ether (LPG-DME) compression ignition engine was investigated under homogeneous charge, stratified charge and diffusion combustion conditions. LPG was used as the main fuel and injected into the combustion chamber directly. DME was used as an ignition promoter and injected into the intake port. Different LPG injection timings were tested to verify the combustion characteristics of the LPG-DME compression ignition engine. The combustion was divided into three region which are homogeneous charge, stratified charge, and diffusion combustion region according to the injection timing of LPG. The HC emission was reduced with LPG stratification. However, the carbon monoxide and particulate matter emissions were increased. The ignition timing was advanced with LPG stratification. This advance combustion was because of charge temperature and cetane number stratification with LPG.
Keywords
HCCI(Homogeneous Charge Compression Ignition); SCCI(Stratified Charge Compression Ignition); DME(Di-methyl Ether); LPG(Liquefied Petroleum Gas);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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