Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study of Downsizing Effect on Turbocharged LPG Direct Injection(T-LPDI) Engine with Startability Improvement by Optimization of Fuel Control System

LPG 직분사 엔진의 다운사이징 효과 및 시동성 개선을 위한 연료 제어시스템 최적화에 관한 연구

  • Lim, Jongsuk (Engine System Korea, Continental Automotive Systems Corporation) ;
  • Kim, Dowan (Engine System Korea, Continental Automotive Systems Corporation) ;
  • Park, Hanyong (Engine System Korea, Continental Automotive Systems Corporation) ;
  • Song, Jinoh (R&D Division, Hyundai and Kia Corporate) ;
  • Han, Junghwan (R&D Division, Hyundai and Kia Corporate) ;
  • Yook, Chulsoo (R&D Division, Hyundai and Kia Corporate) ;
  • Park, Seongmin (R&D Division, Hyundai and Kia Corporate) ;
  • Shin, Yongnam (Research & Development Center, Motonic Corporation)
  • 임종석 (콘티넨탈 오토모티브 엔진시스템사업부) ;
  • 김도완 (콘티넨탈 오토모티브 엔진시스템사업부) ;
  • 박한용 (콘티넨탈 오토모티브 엔진시스템사업부) ;
  • 송진오 (현대기아자동차 연구개발본부) ;
  • 한정환 (현대기아자동차 연구개발본부) ;
  • 육철수 (현대기아자동차 연구개발본부) ;
  • 박성민 (현대기아자동차 연구개발본부) ;
  • 신용남 (모토닉 기술연구소)
  • Received : 2016.04.12
  • Accepted : 2016.08.08
  • Published : 2016.11.01
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Abstract

The new 1.4 L turbocharged LPG direct injection (T-LPDI) engine is presented in this paper to improve the fuel efficiency of the vehicles installed with the 2.0 L LPG port fuel injection (LPI) engine, while maintaining the performance as a downsizing concept for the new engine platform development. Firstly, the return type high pressure LPG fuel supply system is designed and mounted in the new 1.4 L T-LPDI engine. As a result, this new engine shows a much better WOT performance and approximately 8 % of improved fuel economy level, as compared to the 2.0 L LPI vehicle. Secondly, the LPDI engine specific optimized design for high pressure fuel components and fuel injection control strategies are proposed and evaluated in order to overcome the restartability problem in a heat-soaked condition called the vapor lock phenomenon. Consequently, these experimental results illustrate a great potential for the developed 1.4 L T-LPDI engine as a possible substitute for the 2.0 L LPI engine.

Keywords

References

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