| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic transmission hydraulic control device capable of decreasing the number of components by sharing a check valve for measures taken when a switching valve switching over between a normal mode and an economic run mode is stuck to the economic run mode with the other applications.SOLUTION: If a line pressure pl is not supplied and an electromagnetic pump pressure PEMOP is supplied from an electromagnetic pump 20, then a switching valve 60 is set in a second state to supply the electromagnetic pump pressure PEMOP to a hydraulic servomechanism 4 via oil passages f1, f2, and d2 and the electromagnetic pump pressure PEMOP supplied to an oil passage g1 is cut off by a check valve 40. If the line pressure PL is supplied, a manual valve 30 is in an output state, and the switching valve 60 is fixed in the second state, then the line pressure PL is supplied to the hydraulic servomechanism 4 via oil passages a1, b1, b2, b3, g1, and d1. |
