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    국내학술지 제목 게시판 내용
    제목(국문) Development of a new mechanical electro hydraulic valvetrain system
    제목(영문) Development of a new mechanical electro hydraulic valvetrain system
    저자 - (Jongwon Chung ,School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 08826, Korea ) ▷공저자네트워크등록하기
    - (Namho Kim ,School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 08826, Korea ) ▷공저자네트워크등록하기
    - (Hyunjung Oh ,School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 08826, Korea ) ▷공저자네트워크등록하기
    - (Kyoungdoug Min. ,School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 08826, Korea ) ▷공저자네트워크등록하기
    - (Myungsik Choi ,Hyundai Motor Company, 772 1, Jangduk dong, Hwaseong Si, Gyeonggi Do, 445-706, Korea ) ▷공저자네트워크등록하기
    - (Wonkyu Kim ,Hyundai Motor Company, 772 1, Jangduk dong, Hwaseong Si, Gyeonggi Do, 445-706, Korea ) ▷공저자네트워크등록하기
    초록

    .

    초록(영문)

    Variable valve actuation (VVA) technologies can provide improvements in fuel economy of spark-ignition (SI) engines by shifting valve timings or generating valve profiles that can minimize pumping loss. Electro hydraulic valve (EHV) is one of VVA technologies that is highly flexible in producing valve profiles to control charge mass without throttle. In this work, a new EHV which has a unique operating mode, namely mechanical mode, is introduced. The mechanical mode enables operation of valvetrain under circumstances of EHV malfunctions: the mechanical electro-hydraulic valvetrain (MEHV) developed in this study was capable of stable operation under various operating modes at wide ranges of oil temperatures and cam speeds with appropriate valve seating velocity and ramp duration. The MEHV is a VVA technology that can resolve issues of previous EHVs which lacked reliability under emergency conditions.

    keyword Electrohydraulic valve (EHV)
    Mechanical electro-hydraulic valve (MEHV)
    Valve seating characteristics
    Variable valvetrain system
    저널명 Journal of Mechanical Science and Technology ▷관련저널보기
    VOL 35
    PAGE 0361
    발표년도 2021
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