Patent ID: 9033852
Filing Date: 2015-05-19
Classification: B60W,F16H,Y10T

Abstract:
1. A hydraulic control device for a vehicle including an engine, the hydraulic control device comprising: a torque converter configured to transmit rotary power of the engine via hydraulic oil; a forward-reverse travel switching mechanism including a frictional engagement element for travel that is engaged or disengaged based on a hydraulic oil pressure, the forward-reverse travel switching mechanism configured to switch a rotational direction of the rotary power transmitted from the torque converter by engagement or disengagement of the frictional engagement element; a control valve configured to change a hydraulic oil amount in the torque converter and the hydraulic oil pressure of the forward-reverse travel switching mechanism by changing a single controlled hydraulic pressure; and an electronic control unit configured to control the single controlled hydraulic pressure of the control valve to control the hydraulic oil amount in the torque converter and the hydraulic oil pressure of the forward-reverse travel switching mechanism, the electronic control unit configured to increase the single controlled hydraulic pressure when the hydraulic oil amount in the torque converter is insufficient at a start of the engine or immediately after the start of the engine than that when the hydraulic oil amount in the torque converter is sufficient at the start of the engine or immediately after the start of the engine.