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A Study on the CAI Combustion Characteristics and Stratified Combustion to Extend the Operating Region Using Direct Injection Gasoline Engine  

Lee, Chang-Hee (Graduate School of HanYang University)
Choi, Young-Jong (Graduate School of HanYang University)
Lim, Kyoung-Bin (Department of Mechanical Design Engineering, Hanbat National University)
Lee, Ki-Hyung (Department of mechanical Engineering, HanYang University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.5, 2006 , pp. 25-31 More about this Journal
Abstract
Controlled Auto Ignition(CAI) combustion has great potential in achieving significant increase in engine efficiency, while simultaneously reducing exhaust emissions. The process itself involves the auto ignition and subsequent simultaneous combustion of a premixed charge. In this study, NVO(Negative Valve Overlap) system was applied to a CAI engine in order to use residual gas. The fuel was injected directly to the cylinder under the high temperature condition resulting from heating the intake port to initiate CAI combustion. This paper introduced the valve timing strategy and experimental set-up. From this study, the effect of engine speed and valve timing on CAI combustion and exhaust emissions was clarified. In addition, stratified charge method was used to extend CAI operating region.
Keywords
CAI(Controlled Auto ignition); HCCI(Homogeneous charge Compression Ignition); NVO(Negative Valve Overlap); EVC(Exhaust Valve Close); IVC(Intake Valve Close); EGR(Exhaust Gas Recirculation);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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