VENTILTRIEB FÜR EINE BRENNKRAFTMASCHINE
    97.
    发明公开
    VENTILTRIEB FÜR EINE BRENNKRAFTMASCHINE 审中-公开
    VALVE列车内燃发动机

    公开(公告)号:EP2181250A2

    公开(公告)日:2010-05-05

    申请号:EP07722012.7

    申请日:2007-03-09

    发明人: WUTZLER, Jörg

    IPC分类号: F01L1/053 F01L1/047 F01L13/00

    摘要: The invention relates to a valve drive for internal combustion engines, comprising at least one cam assembly which can be axially displaced on a camshaft. Said assembly consists of at least two cams (2, 3) having different profiles and actuating optionally at least one gas exchange valve for adjusting different valve lifts and/or valve timings. For this purpose, one cam is connected to the camshaft so as to rotate with the camshaft and the other cam is mounted so as to be rotated on the camshaft. The cam that is rotationally mounted on the camshaft can be positively connected to and released from the cam that is connected so as to rotate with the camshaft via a controlled pilot and main locking plunger (6). The rotationally fixed cam has a larger profile height than the rotationally mounted cam. The larger profile height is designed for a relatively large lift of the gas exchange valve, while the lower cam profile height is designed for smaller lift heights. By displacing the cam assembly when the cams are coupled, the cam with the larger or the smaller profile height can be engaged with the gas exchange valve. A zero lift of the gas exchange valve can be adjusted, when the cam with the smaller profile height engages, by decoupling the rotational cam from the cam that is arranged on the camshaft so as to rotate therewith.