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Modeling of Engine Coolant Temperature in Diesel Engines for the Series Hybrid Powertrain System

직렬형 하이브리드 추진시스템의 디젤 엔진 냉각수온 모델링

  • Kim, Yongrae (Department of Engine Research, Korea Institute of Machinery and Materials) ;
  • Lee, Yonggyu (Department of Engine Research, Korea Institute of Machinery and Materials) ;
  • Jeong, Soonkyu (The 5th R&D Institute-1, Agency for Defense Development)
  • 김용래 (한국기계연구원 그린동력연구실) ;
  • 이용규 (한국기계연구원 그린동력연구실) ;
  • 정순규 (국방과학연구소 5본부 1부)
  • Received : 2015.07.01
  • Accepted : 2015.10.13
  • Published : 2016.01.01

Abstract

Modeling of engine coolant temperature was conducted for a series hybrid powertrain system. The purpose of this modeling was a simplification of complex heat transfer process inside a engine cooling system in order to apply it to the vehicle powertrain simulation software. A basic modeling concept is based on the energy conservation equation within engine coolant circuit and are composed of heat rejection from engine to coolant, convection heat transfer from an engine surface and a radiator to ambient air. At the final stage, the coolant temperature was summarized as a simple differential equation. Unknown heat transfer coefficients and heat rejection term were defined by theoretical and experimental methods. The calculation result from this modeling showed a reasonable prediction by comparison with the experimental data.

Keywords

References

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