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发明授权
CN100412418C 用于车辆自动变速器的液压控制设备 有权

用于车辆自动变速器的液压控制设备
摘要：
公开了一种与自动变速器一起使用的液压控制设备，该设备包括故障安全切换阀，其具有同与变速器相关电磁阀的排放端口连接的与逃脱相关输出端口，与变速器相关电磁阀对应于建立与逃脱相关档位的与逃脱相关摩擦耦合装置，还具有液压输入到的与逃脱相关输入端口和排放工作油的排放端口，其中该故障安全切换阀可选择性地切换到正常连通状态和与故障相关连通状态，在前一状态中与逃脱相关输出端口和排放端口彼此连通并且与逃脱相关输入端口关闭，在后一状态中与逃脱相关输出端口和与逃脱相关输入端口彼此连通并且排放端口关闭，使得液压从切换阀的与逃脱相关输出端口被供应到对应于与逃脱相关摩擦耦合装置的与变速器相关电磁阀的排放端口。
摘要（英）：

A hydraulic control apparatus for use with a vehicle's automatic transmission, the apparatus including a fail-safe switch valve which has an escape-related output port connected to a drain port of a transmission-related solenoid valve corresponding to an escape-related frictional coupling device to establish an escape-related speed step, and additionally has an escape-related input port to which a hydraulic pressure is inputted, and a drain port from which a hydraulic fluid is drained, wherein the fail-safe switch valve is selectively switchable to a normal communication state thereof in which the escape-related output port and the drain port are communicated with each other and the escape-related input port is shut off, and to a fail-related communication state thereof in which the escape-related output port and the escape-related input port are communicated with each other, and the drain port is shut off, so that a hydraulic pressure is supplied from the escape-related output port of the fail-safe switch valve to the drain port of the transmission-related solenoid valve corresponding to the escape-related frictional coupling device.

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