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    Valve driving apparatus for engine
    2.
    发明公开
    Valve driving apparatus for engine 失效
    Ventilsteuerungfüreine Brennkraftmaschine

    公开(公告)号：EP0867601A1

    公开(公告)日：1998-09-30

    申请号：EP98105319.2

    申请日：1998-03-24

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Moriya, Yoshihito, c/o Toyota Jidosha K.K. ,  Sugimoto, Kiyoshi, c/o Toyota Jidosha K.K. ,  Hasegawa, Tadao, c/o Toyota Jidosha K.K. ,  Iden, Noriyuki, c/o Toyota Jidosha K.K.

    IPC分类号： F01L1/344 ,  F01L1/26

    CPC分类号： F01L1/34 ,  F01L1/143 ,  F01L1/26 ,  F01L1/262 ,  F01L13/0042 ,  F02B2275/18

    摘要： A valve driving apparatus for an internal combustion engine. Each combustion chamber has a pair of intake ports and a pair of intake valves (18) for selectively opening and closing the intake ports. Each intake valve is driven with a variable amount of valve lift. The apparatus includes a camshaft (10) rotatably supported by the engine, cams (11), cam followers (25), a shaft moving mechanism, and brackets (23). Each cam lifts an associated intake valve in response to rotation of the camshaft. Each cam has a cam nose for lifting a corresponding intake valve. The radius of the cam nose varies in the axial direction. Cam followers (25) transmit movement of the intake cams to the intake valves. The shaft moving mechanism moves the cams (11) relative to the valves (18) in an axial direction of the camshaft thereby varying the amount of valve lift. A lifter structure is provided that is circularly shaped to improve manufacturing accuracy. In another embodiment, the valves are oriented to increase the amount of axial movement that the cam can make, which results in greater optimization of the air intake amount.

    摘要翻译： 一种用于内燃机的阀驱动装置。 每个燃烧室具有一对进气口和一对用于选择性地打开和关闭进气口的进气门（18）。 每个进气阀都由可变量的气门升程驱动。 该装置包括由发动机可旋转地支撑的凸轮轴（10），凸轮（11），凸轮从动件（25），轴移动机构和支架（23）。 每个凸轮响应于凸轮轴的旋转而提升相关联的进气门。 每个凸轮具有用于提升相应的进气门的凸轮鼻。 凸轮凸轮的半径在轴向上变化。 凸轮从动件（25）将进气凸轮的运动传递到进气门。 轴移动机构使凸轮（11）相对于阀（18）沿凸轮轴的轴向移动，从而改变气门升程量。 提供圆形的升降机结构以提高制造精度。 在另一个实施例中，阀被定向以增加凸轮可以产生的轴向运动量，这导致进气量的更大优化。