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기어 물림 상태의 타행 주행 저항을 이용한 엔진 운전 조건의 분석

Analysis of Engine Operation Condition by Using Coastdown Test under Gear Engaged Condition

  • 심범주 (경희대학교 대학원 기계공학과) ;
  • 박경석 (경희대학교 기계공학과) ;
  • 박준수 (쌍용자동차 기술연구소) ;
  • 민병두 (쌍용자동차 기술연구소)
  • 투고 : 2011.10.20
  • 심사 : 2012.03.05
  • 발행 : 2012.11.01

초록

Conventional method to transform vehicle driving condition to engine operation mode is to use vehicle road load under neutral gear and mechanical efficiency of drivetrain. But this method requires additional measurement of efficiency of drivetrain on a test rig. And this measurement is normally done at fixed speed and thus estimated accuracy of engine operation mode is not considered to be high enough. This study suggests new method to calculate engine operation mode for prescribed driving mode such as NEDC using vehicle coastdown test under gear engaged condition without measurement of mechanical efficiency of drivetrain. Coastdown test was done under neutral and gear engaged condition for comparison and also trial to extract mechanical loss of drivetrain was carried out. Calculated engine torque by conventional and newly suggested method was compared with actually measured torque of a vehicle on a chassis dynamometer during NEDC. Newly suggested method showed slightly higher accuracy of accumulated brake work during NEDC.

키워드

참고문헌

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