Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effects of Injection Strategies on the Partial Premixed Charge Combustion and Emission Characteristics in a Diesel Engine

디젤엔진의 부분 예혼합 연소 및 배기 특성에 대한 분사전략의 영향

  • Kim, Jaewoong (Department of Mechanical Engineering, Hanyang University) ;
  • Kim, Yungjin (Department of Mechanical Engineering, Hanyang University) ;
  • Park, Sangki (Department of Mechanical Engineering, Hanyang University) ;
  • Lee, Kihyung (Department of Mechanical Engineering, Hanyang University)
  • Received : 2012.08.03
  • Accepted : 2013.01.14
  • Published : 2013.07.01
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Abstract

Recently, PCCI (premixed charge compression ignition) combustion is studied to reduce both NOx and PM because of homogeneous mixture formation and lower combustion temperature. It has also merit of increasing thermal efficiency owing to better air-fuel mixure. However, it is well known that PCCI combustion has a weakness in fuel economy because PCCI combustion tends to start before TDC. Therefore, it is necessary to find an optimal conditions for PCCI combustion which maintains reduction of NOx, PM and increase of thermal efficiency. In this study, pPCCI combustion was realized by adding early injection strategy to a conventional diesel engine. In addition, the characteristics of pPCCI combustion was analized by comparing conventional diesel injection strategy. The results show that NOx and PM per power in pPCCI combution were reduced compared to a conventional diesel combustion.

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References

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