Hydraulic pressure control device for automatic transmission for vehicle including reverse stage and lock-up clutch control systems.

摘要

A hydraulic pressure control device for an automatic transmission for a vehicle, including a first, a second and a third hydraulic pressure control valve (60, 100, 92), wherein the third hydraulic pressure control valve (92) cooperates with the first hydraulic pressure control valve (60) to control switching over of a certain operation of the automatic transmission such as engagement and disengagement of a torque converter lock-up clutch during forward traveling of the vehicle, and also cooperates with the second hydraulic pressure control valve (100) to selectively prevent setting up of the reverse stage when a manual shift valve is set to the reverse range while the vehicle is traveling forward.