| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic control device for an automatic transmission capable of securing vehicle traveling even when an electric system is failed, without complicating a hydraulic circuit and hydraulic control. <P>SOLUTION: This hydraulic control device comprises a plurality of shift actuators 41-44 setting transmission gear train transmitting power from the plurality of transmission gear trains, neutral switch valves 51-54, and a manual valve for selectively switching a shift lever S. When the manual valve is located at a P-position, the neutral switching valves 51-54 are switched from a stationary operation state to a neutral mode, and the shift actuators 41-44 are respectively placed at a neutral position, and in a D-position or a R-position, the specific neutral switch valve 52 is switched to a limp home mode, and hydraulic pressure is supplied to the shift actuator 42 to set the transmission gear train transmitting power, by the shift actuator. <P>COPYRIGHT: (C)2007,JPO&INPIT |
