한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제15권4호
  • /
  • Pages.76-82
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  • 2007
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

승용차 디젤엔진의 연료 다단 분사가 연소 안정 및 배출물 특성에 미치는 영향

The Effect of Multiple Injections on the Stability of Combustion and Emissions Characteristic in a Passenger Car Diesel Engine

  • 발행 : 2007.07.01
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초록

This paper described the effect of the multiple injections on the stability of combustion and emission characteristics in a direct injection diesel engine at various operating conditions. In order to investigate the influence of multiple injections in a diesel engine, the fuel injection timing was varied one main injection and two pilot injections at various conditions. The experimental apparatus consisted of DI diesel engine with four cylinders, EC dynamometer, multi-stage injection control system, and exhaust emissions analyzer. The combustion and emission characteristics were analyzed for the main, pilot-main injection, pilot-pilot-main injection strategies. It is revealed that the combustion pressure was smoothly near the top dead center and the coefficient of variations is reduced due to the effect of pilot injection. Also, $NO_x$ emissions are dramatically decreased with pilot injection because the decrease of rate of heat release. However, the soot is increased at early pilot injection and main injection.

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참고문헌

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