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    • 15. 发明授权
    • Automatic transmission
    • 自动变速器
    • US5579883A
    • 1996-12-03
    • US437314
    • 1995-05-09
    • Kazumasa TsukamotoMasahiro HayabuchiMasanori KadotaniSatoru Kasuya
    • Kazumasa TsukamotoMasahiro HayabuchiMasanori KadotaniSatoru Kasuya
    • F16H3/44F16D25/0638F16D25/10F16H57/10F16H61/30F16H63/30
    • F16D25/0638F16D25/10F16H63/3026F16H2200/0047F16H2200/2012
    • First and second hydraulic servo units operate respective frictional engagement elements in a transmission and each includes first and second cylinders, each having a side wall portion interposed between the two frictional engagement elements. The first cylinder has first outer and inner cylinder portions and the first hydraulic servo unit further includes a first piston having inner and outer cylindrical surfaces slidably supported by the first outer and first inner cylinder portions of the first cylinder for reciprocating axial motion into and out of engagement with one frictional engagement element. First return springs are arranged radially inward of the one frictional engagement element for returning the first piston. The second cylinder includes second outer and inner cylinder portions and the second hydraulic servo unit further includes a second piston having a larger diameter portion and a smaller diameter portion, slidably supported by the inner cylindrical surfaces of the second outer cylinder portion and the first inner cylinder portion, for reciprocating axial motion into and out of engagement with the second frictional engagement element. Second return springs are arranged around the inner circumference of the one frictional engagement element for returning the second piston.
    • 第一和第二液压伺服单元在变速器中操作相应的摩擦接合元件,并且每个包括第一和第二缸,每个具有插入在两个摩擦接合元件之间的侧壁部分。 第一气缸具有第一外筒部和内筒部,第一液压伺服单元还包括第一活塞,其具有由第一气缸的第一外筒体部和第一内筒部可滑动地支撑的内筒体和外筒体, 与一个摩擦接合元件接合。 第一复位弹簧布置在一个摩擦接合元件的径向内侧,用于使第一活塞返回。 第二气缸包括第二外筒部分和第二内筒部分,第二液压伺服单元还包括具有较大直径部分和较小直径部分的第二活塞,其可滑动地由第二外筒部分和第一内筒部分的内圆柱表面支撑 部分,用于往复运动的轴向运动进入和离开与第二摩擦接合元件的接合。 第二复位弹簧布置在一个摩擦接合元件的内圆周周围,用于使第二活塞返回。