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    • 8. 发明授权
    • Speed change control device of automatic transmission
    • 自动变速器变速控制装置
    • US5305665A
    • 1994-04-26
    • US939600
    • 1992-09-02
    • Kunihiko SanoMitsugi Tazawa
    • Kunihiko SanoMitsugi Tazawa
    • F16H61/02F16H63/30F16H61/00
    • F16H61/0206F16H63/3003
    • A speed change control device for an automatic transmission is shown which comprises first, second and third shift valves, each having two switching positions for selectively carrying out application and releasing of hydraulic pressure to and from an oil chamber of a hydraulically operated friction element. First and second solenoid valves are employed each controlling an output of hydraulic pressure in accordance with an electric signal applied thereto. The first solenoid valve outputs a hydraulic pressure for controlling the switching operation of the second shift valve, and the second solenoid valve outputs a hydraulic pressure for controlling the switching operation of the first shift valve. A passage structure is further employed which applies the hydraulic pressure from the second solenoid valve to the third shift valve to control the switching operation of the same only when the second shift valve assumes one given position.
    • 示出了用于自动变速器的变速控制装置,其包括第一,第二和第三换档阀,每个换档阀具有两个切换位置,用于选择性地执行向液压操作的摩擦元件的油室施加和释放液压的液压。 采用第一和第二电磁阀,其根据施加到其上的电信号控制液压输出。 第一电磁阀输出用于控制第二换档阀的切换操作的液压,第二电磁阀输出用于控制第一换档阀的切换操作的液压。 进一步采用通道结构,其将来自第二电磁阀的液压施加到第三换档阀,以仅在第二换档阀呈现一个给定位置时控制其的切换操作。