Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Start of Combustion Detection Method for Gasoline Homogeneous Charge Compression Ignition Engine

가솔린 균일 예혼합 압축착화 엔진의 착화시점 검출

  • Choe, Doo-Won (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • Lee, Min-Kwang (Department of Automotive Engineering, Graduate School, Hanyang University) ;
  • SunWoo, Myoung-Ho (Department of Automotive Engineering, Hanyang University)
  • 최두원 (한양대학교 자동차공학과 대학원) ;
  • 이민광 (한양대학교 자동차공학과 대학원) ;
  • 선우명호 (한양대학교 자동차공학과)
  • Published : 2008.07.01
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Abstract

Gasoline Homogeneous Charge Compression Ignition (HCCI) combustion is a new combustion concept. Unlike the conventional internal combustion engine, the premixed fuel mixture with high residual gas rate is auto-ignited and burned without flame propagation. There are several operating factors which affect HCCI combustion such as start of combustion (SOC), residual gas fraction, engine rpm, etc. Among these factors SOC is a critical factor in the combustion because it affects exhaust gas emissions, engine power, fuel economy and combustion characteristics. Therefore SOC of gasoline HCCI should be controlled precisely, and SOC detection should be preceded SOC control. This paper presents a control oriented SOC detection method using 50 percent normalized difference pressure. Normalized difference pressure is defined as the normalized value of difference pressure and difference pressure is difference between the in-cylinder firing pressure and the motoring pressure. These methods were verified through the HCCI combustion experiments. The SOC detection method using difference pressure provides a fast and precise SOC detection.

Keywords

References

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