Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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A Numerical Analysis for Fuel Consumption by Improvement of Intake/Exhaust Valve Timing in a Common Rail Diesel Engine for a Generator

커먼레일 디젤엔진의 흡배기밸브 타이밍 개선을 통한 연비절감에 대한 수치해석적 연구

  • Kim, Seung Chul (Research Center for Tribology, Mechatronics and Energy Technology, Hongik University) ;
  • Kim, Chung Kyun (Research Center for Tribology, Mechatronics and Energy Technology, Hongik University)
  • 김승철 (홍익대학교 트리보메카, 에너지기술 연구센터) ;
  • 김청균 (홍익대학교 트리보메카, 에너지기술 연구센터)
  • Received : 2017.06.05
  • Accepted : 2017.06.21
  • Published : 2017.06.30
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Abstract

The common rail diesel engine used in this study uses mechanically driven camshaft for the operation of intake and exhaust valves, and the timing of valve opening and closing is fixed according to the operating conditions of the vehicle. However, the electric generator engine operates at a constant speed and partial load. Therefore, in order to optimize the design of common rail diesel engine for power generation, the characteristics of diesel combustion and emissions according to the change of valve timing were examined and calculated in terms of fuel economy. The valve timing of the diesel engine influenced the combustion characteristics by changing the intake and exhaust flow and it was considered that the fuel efficiency of the generator could be improved.

본 연구에서 사용되는 발전기용 커먼레일 디젤엔진은 흡 배기 밸브의 작동을 위해 기계적으로 구동되는 캠축을 이용하고 있으며, 차량 운전조건 알맞게 밸브의 개폐시기가 고정되어 있다. 그러나 발전기용 엔진은 회전속도가 일정하고 부분부하에서 운전된다. 따라서, 발전용 커먼레일 디젤엔진의 최적화 설계를 위해 밸브 타이밍의 변화에 따른 디젤연소와 배출가스의 특성을 고찰하여 연비 측면에서 계산하였다. 디젤엔진의 밸브 타이밍은 흡배기 유동을 변화시킴으로서 연소특성에 영향을 주었으며 발전기의 연비 개선이 가능하다고 판단되었다.

Keywords

References

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