Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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A Study on Ignition Probability and Combustion Characteristics of Low Pressure Direct Injection LPG according to a Function of Ambient Condition

분위기 조건 변화에 따른 저압 직접분사식 LPG의 점화성 및 연소특성 연구

  • 정성식 (동아대학교 기계공학과) ;
  • 황성일 (기아자동차 부산서비스센터) ;
  • 염정국 (동아대학교 기계공학과) ;
  • 전병열 (현대자동차 서부산서비스센터)
  • Received : 2016.01.02
  • Accepted : 2016.04.01
  • Published : 2016.04.30
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Abstract

Under part load condition of spark-ignition engine, pumping loss had great effect on engine efficiency. To reduce pumping loss, the study designed spark-ignited engines to make direct spray of gasoline to combustion chamber. In spark-ignited direct-injection engines, ignition probability is important for successful combustion and flame propagation characteristics are also different from pre-mixed combustion. This study designed a visualization testing device to study ignition probability of spark-ignited direct-injection LPG fuel and combustion flame characteristics. This visualization device consists of combustion chamber, fuel supply system, air supply system, electronic control system and data acquisition system. Ambient pressure, ambient temperature and ambient air flow velocity are important parameters on ignition probability of LPG-air mixture and flame propagation characteristics, and the study also found that sprayed LPG fuel can be directly ignited by spark-plug under proper ambient conditions. To all successful cases of ignition, the study recorded flame propagation image in digital method through ICCD camera and its flame propagation characteristics were analyzed.

Keywords

References

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Cited by

  1. A Basic Study on Combustion Characteristics of Radical Ignition Sub-chamber Type CNG DI Engine vol.22, pp.1, 2018, https://doi.org/10.9726/kspse.2018.22.1.056