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김철순(Cheolsoon Kim),정길조(Giljo Jung),박진수(Jinsu Park),최종윤(Jongyun Choi),최윤석(Yoonseok Choi) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11
Recently, exhaust emission regulation have become more stringent as a result of increased environmental issue and high-fuel-efficient vehicles are needed from customers. As one of the solutions, adoption of idle stop device has been increasing on vehicle. In case of the idle stop device with electric oil pump, it is needed to minimize the time delay by rapidly raising hydraulic pressure. In this study, considering shape of the hydraulic circuit in sub control valve, the method using CFD was developed to improve the hydraulic response for idle stop device with electric oil pump. Through this method, it could predict the location and size of the air pocket, and confirmed that the air pocket cause the delay of hydraulic pressure increase. As a result, it is possible to propose the sub control valve which is minimized the delay of hydraulic pressure.