Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Characteristics of Transient Performance in a Turbocharged GDI Engine with TiAl Turbine

TiAl 터빈을 적용한 과급 직분식 전기점화 엔진의 과도운전 성능특성

  • Park, Chansoo (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jung, Jinyoung (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Bae, Choongsik (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
  • 박찬수 (한국과학기술원 기계공학과) ;
  • 정진영 (한국과학기술원 기계공학과) ;
  • 배충식 (한국과학기술원 기계공학과)
  • Received : 2014.10.31
  • Accepted : 2015.02.16
  • Published : 2015.05.01
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Abstract

Turbocharged gasoline direct injection engine is one of promising technologies in the automotive industry. However, reduction in turbo-lag under transient operation is one of important challenging points to improve drivability. Engine transient performance was investigated in a 4-cylinder 2.0 L turbo-gasoline direct injection (T-GDI) engine using Inconel and TiAl (Titanium Aluminide alloy) turbine wheel turbochargers. The TiAl turbocharger performed superior transient boost pressure and torque rises under various engine transient operation conditions. These were mainly due to lower turbine rotational inertia of TiAl turbocharger. The Maximum boost pressure and torque build up were founded in 1500 rpm and 2000 rpm, instant load change from 20% to 100% of pedal position.

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References

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