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    • 3. 发明公开
    • Valve operating system for internal combustion engines
    • VentilsteuervorrichtungfürBrennkraftmaschinen。
    • EP0318303A1
    • 1989-05-31
    • EP88311160.1
    • 1988-11-25
    • HONDA GIKEN KOGYO KABUSHIKI KAISHA
    • Oikawa, Toshihiro c/o Kabushiki Kaisha HondaTanai, Tsuneo c/o Kabushiki Kaisha HondaYamada, Noriyuki c/o Kabushiki Kaisha HondaSaka, Tsutomu c/o Kabushiki Kaisha HondaKobayashi, Toshiki c/o Kabushiki Kaisha Honda
    • F01L31/22F01L1/26F01L13/00F01M9/10
    • F01L1/267F01L2001/0537F01L2001/34436F01M9/10F01M9/101F01M9/102F01M9/108F02B2275/18
    • A drive cam follower (24) operatively connected to an engine valve and a free cam follower (25) capable of becoming free relative to the engine valve are adjacently disposed for operation in mutually different modes in response to rotation of a cam shaft. A connection change-over mechanism (26) is provided between the cam followers and capable of changing-over the interconnection and disconnection thereof, and resilient biasing means (125) is provided between the free cam follower and an engine body for resiliently urging the free cam follower toward the cam shaft. The resilient biasing means comprises an urging piston slidably received in the engine body for abutmant against the free cam follower, and a spring (127,128) interposed between the urging piston and the engine body to resiliently bias the urging piston in a direction to abut against the free cam folllower. The urging piston is provided, at its end closer to the free cam follower, with an abutment (126) formed of a reduced diameter to abut against the free cam follower. This facilitates assembling of the resilient biasing means to the engine body, and makes it possible to dispose the resilient biasing means in proximity to a pivoting point of the free cam follower.
    • 可操作地连接到发动机气门的驱动凸轮从动件(24)和能够相对于发动机气门变空的自由凸轮从动件(25)被相邻地设置成响应于凸轮轴的旋转以相互不同的模式操作。 一个连接转换机构(26)设置在凸轮从动件之间并且能够切换其互连和断开,并且弹性偏压装置(125)设置在自由凸轮从动件和发动机体之间,用于弹性地推动自由 凸轮从动件朝向凸轮轴。 弹性偏压装置包括可滑动地容纳在发动机主体内用于抵靠自由凸轮从动件的推动活塞,以及插入在推压活塞和发动机本体之间的弹簧(127,128),以使推压活塞沿着抵靠 自由凸轮 推动活塞在其端部更靠近自由凸轮从动件处设置有由减小的直径形成以抵靠自由凸轮从动件的支座(126)。 这有助于将弹性偏置装置组装到发动机主体,并且使得可以将弹性偏置装置设置在自由凸轮从动件的枢转点附近。