| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a range switching device capable of holding a parking released state, even when the whole solenoid valves assume a non-energized state, when set in a drive D range, a neutral N range and a reverse R range. <P>SOLUTION: A parking switching valve 3 has a spool 3a movable to a first position and a second position, and has an oil chamber A for generating energizing force by a difference in the pressure receiving area of a land part of the spool 3a. The oil chamber A is provided with a second input port (b) for inputting line pressure when the spool 3a is put in the second position. The spool 3a is held in the second position against a spring 3b when the energizing force is generated by inputting the line pressure to the second input port (b). Thus, a parking device 10 is held in the parking released state. <P>COPYRIGHT: (C)2009,JPO&INPIT |
