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    • 7. 发明授权
    • Line pressure control system for automatic transmission
    • 自动变速器线路压力控制系统
    • US4790217A
    • 1988-12-13
    • US894277
    • 1986-08-07
    • Toru KawanoHidehiko Mishima
    • Toru KawanoHidehiko Mishima
    • F16H61/26F16H59/14F16H59/40F16H61/00F16H61/02F16H61/04F16H61/10B60K41/06
    • F16H61/0021F16H59/14F16H59/40F16H61/02Y10T477/693958
    • An automatic transmission has a transmission gear mechanism for transmitting the engine output power by way of a plurality of power transmission paths, and friction engagement elements which are operated by a line pressure from a control valve to change the power transmission path through the transmission gear mechanism. Feed of the line pressure is controlled by a throttle pressure corresponding to the engine load and a governor pressure corresponding to the output speed of the transmission gear mechanism to effect gear shifting. A line pressure control system for controlling the line pressure comprises a regulator valve for regulating the line pressure, and a throttle modulator valve for determining a throttle modulator pressure for controlling the regulator valve according to the governor pressure and the throttle pressure so that the line pressure is increased with increase of the throttle pressure and is lowered with increase of the output speed of the transmission gear mechanism.
    • 自动变速器具有用于通过多个动力传递路径传递发动机输出功率的传动齿轮机构和通过来自控制阀的管路压力操作以通过传动齿轮机构改变动力传递路径的摩擦接合元件 。 线路压力的馈送由对应于发动机负载的节气门压力和对应于变速齿轮机构的输出速度的调速器压力控制以实现变速。 用于控制管路压力的管路压力控制系统包括用于调节管路压力的调节阀,以及用于根据调速器压力和节流阀压力确定用于控制调节阀的节气门调节器压力的节气门调节阀, 随着节气门压力的增加而增加,并且随着传动齿轮机构的输出速度的增加而降低。