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    • 1. 发明申请
    • Transmission Shifting Assembly and Method
    • 变速装置和方法
    • US20130152778A1
    • 2013-06-20
    • US13326772
    • 2011-12-15
    • Andrew D. Dumas
    • Andrew D. Dumas
    • F15B15/16F16H59/00
    • F15B11/036F16D49/12F16H61/30F16H63/3003F16H2063/3006
    • An transmission servo assembly having a dual piston assembly for use in an automobile to transmission is described. The dual piston assembly includes a primary and a secondary piston that, when included within an assembly housing, provide surfaces that may be acted upon by a pressurized fluid so as to drive a servo pin into and away from a band within the transmission. The dual piston assembly allows for the application of a high apply force to servo pin while reducing the pressure of both an apply fluid and a release fluid, and therefore the amount of power used by a fluid pump external to the transmission servo assembly. The transmission servo assembly also substantially eliminates band drag by balancing the pressure applied to surfaces of dual piston system and by providing a biasing member designed and configured to provide suitable initial and ending forces to dual piston system.
    • 描述了一种具有用于汽车传输的双活塞组件的传动伺服组件。 双活塞组件包括主活塞和次活塞,当包括在组件壳体内时,该活塞提供可被加压流体作用的表面,以便将伺服销驱动进入和远离传动装置内的带。 双活塞组件允许对伺服销施加高的施加力,同时降低施加流体和释放流体的压力,并且因此减小由传动伺服组件外部的流体泵所使用的功率。 传动伺服组件还通过平衡施加到双活塞系统表面的压力并且通过提供设计和构造为向双活塞系统提供合适的初始和结束力的偏置构件,基本上消除了带阻。
    • 9. 发明授权
    • Transmission shifting assembly and method
    • 变速组合和方法
    • US09382924B2
    • 2016-07-05
    • US13326772
    • 2011-12-15
    • Andrew D. Dumas
    • Andrew D. Dumas
    • F15B11/036F16H61/30F16H63/30F16D49/12
    • F15B11/036F16D49/12F16H61/30F16H63/3003F16H2063/3006
    • An transmission servo assembly having a dual piston assembly for use in an automobile to transmission is described. The dual piston assembly includes a primary and a secondary piston that, when included within an assembly housing, provide surfaces that may be acted upon by a pressurized fluid so as to drive a servo pin into and away from a band within the transmission. The dual piston assembly allows for the application of a high apply force to servo pin while reducing the pressure of both an apply fluid and a release fluid, and therefore the amount of power used by a fluid pump external to the transmission servo assembly. The transmission servo assembly also substantially eliminates band drag by balancing the pressure applied to surfaces of dual piston system and by providing a biasing member designed and configured to provide suitable initial and ending forces to dual piston system.
    • 描述了一种具有用于汽车传输的双活塞组件的传动伺服组件。 双活塞组件包括主活塞和次活塞,当包括在组件壳体内时,该活塞提供可被加压流体作用的表面,以便将伺服销驱动进入和远离传动装置内的带。 双活塞组件允许对伺服销施加高的施加力,同时降低施加流体和释放流体的压力,并且因此减小由传动伺服组件外部的流体泵所使用的功率。 传动伺服组件还通过平衡施加到双活塞系统表面的压力并且通过提供设计和构造为向双活塞系统提供合适的初始和结束力的偏置构件,基本上消除了带阻。