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대형 디젤 엔진의 연비 향상을 위한 Miller Cam 평가
송창훈(Changhoon Song),왕태중(Tae Joong Wang),임희준(Heejun Im) 한국자동차공학회 2016 한국 자동차공학회논문집 Vol.24 No.1
Miller timing is one of the promising ways which can improve the fuel consumption of internal combustion engines. Indeed, Miller timing employing an early intake valve close is widely applied to large diesel and gas engines to enhance performance and reduce NOx emissions. In this study, performance evaluation is carried out by 1-D cycle simulation in order to estimate the effect of Miller CAM timing before BDC for a 32 L turbocharged diesel engine. To optimize Miller CAM timing, a single stage turbocharger is matched with an early intake valve close since boost pressure is a significant parameter that can control compression work in a turbocharged engine. The engine simulation result shows that there is enough potential to improve fuel consumption rate and also reduce NOx emissions at the same time.