PURPOSE: To properly adjust the delay of the line pressure reduction by delaying the control for lowering the line pressure accompanied with the reduction of the engine load, in particular so that the control corresponds to the delay of the reduction of the transmission torque which is varied according to the torque variation quantity or the speed change ratio, in a hydraulic operation type speed change gear.
CONSTITUTION: A hydraulic controller is equipped with a hydraulic control means 81 for controlling the line pressure according to the operation state, delaying means 82 for delaying the line pressure reduction when the control for lowering the line pressure is carried out, and a delay varying means 83 for varying the delay quantity of the line pressure reduction according to at least one between the input torque variation quantity and the speed change ratio of the speed change mechanism.
KAWAMURA SHUICHI
SAWAZAKI TOMOO
