Evaluation of Combustion Stability of Idling Speed State

LBT연소를 통한 Idling 운전시의 연소안정성 평가

  • 이중순 (정회원, 동명대학 기계과) ;
  • 이종승 (정회원, 동아대학교 대학원) ;
  • 김진영 (정회원, 동아대학교 대학원) ;
  • 정성식 (정회원, 동아대학교 기계공학과) ;
  • 하종률 (정회원, 동아대학교 기계공학과)
  • Published : 1999.06.01

Abstract

It is necessary to discuss lightening engine parts and reducing the friction of sliding parts to improve fuel consumption and combustion stability at idling condition. Lean best torque combustion which produce maximum power at a lean air-fuel ratio is effective for the reduction of exhaust gas emission and the improvement of fuel consumption. Accordingly, this study deals with the expansion of lean combustible limitation, the combustion stability and the reduction of idle speed through the analysis of combustion characteristics on the base of the control technique of precise air-fuel ratio because it does not need to maximum power at idling condition. The idle speed is increased proportional to ISC(Idle Speed Control) duty ratio. On the other hand the idle speed decreased by lean air-fuel ratio. The COV in engine speed is stable within maximum two percent up to 17.6 mixture ratio by the control of ISC duty ratio.

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