Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Study on the Improvement Methods of Engine Efficiency in Hybrid Excavator

하이브리드 굴삭기용 엔진의 효율 향상 방안에 관한 연구

  • Park, Minje (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Min, Kyoungdoug (Department of Mechanical and Aerospace Engineering, Seoul National University)
  • 박민제 (서울대학교 기계항공공학부) ;
  • 민경덕 (서울대학교 기계항공공학부)
  • Received : 2015.11.30
  • Accepted : 2016.03.31
  • Published : 2016.07.01
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Abstract

In this paper, a study based on engine operating conditions versus hybrid excavator engines was conducted about the engine performance and fuel consumption via the 1-D engine simulation model. First of all, engine operating points with performance and emission were determined by driving patterns. The 1-D HFEM(High Frequency Engine Model) was developed for deep insight into engine combustion and the energy conversion phenomena. In accordance with changing operating points, especially High Idle and Rated output conditions, engine parameters and systems such as turbocharger(Waste Gate Turbocharger and Variable Geometry Turbocharger) injection strategies and EGR(Exhaust Gas Recirculation) should be considered. Therefore, various configurations and parametric analysis with optimization methods in hybrid excavator were simulated and optimized by NLPQL(Non-linear Programming by Quadratic Lagrangian algorithm) in 1-D HFEM. As a result, the fuel consumption with the developed hybrid electric excavator engine could be significantly decreased and bsfc(Brake Specific Fuel Consumption) was also reduced about 5 % to 7 % without any performance degradation.

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References

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