Patent ID: 9534677
Date: 2017-01-03
CPC Classifications: B60Y,F16H

Claim:
1. A hydraulic control apparatus for a hydraulic torque converter which includes a first hydraulic line connected to a disengagement-side oil chamber, second and third hydraulic lines connected to an engagement-side oil chamber, and a damper clutch operated by hydraulic pressure of the disengagement-side oil chamber and hydraulic pressure of the engagement-side oil chamber, the hydraulic control apparatus comprising: a lock-up switch valve connected to the first hydraulic line and the second hydraulic line of the hydraulic torque converter so as to control hydraulic pressure supplied to the disengagement-side oil chamber and the engagement-side oil chamber, and adapted to supply the hydraulic pressure exhausted from the engagement-side oil chamber to a lubricating portion or a cooling portion or to supply hydraulic pressure supplied from an additional hydraulic pressure supply source to the lubricating portion or the cooling portion; a slip switch valve disposed between the third hydraulic line of the hydraulic torque converter and the lock-up switch valve and adapted to selectively exhaust or not exhaust the hydraulic pressure supplied to the engagement-side oil chamber to the lock-up switch valve; a damper clutch control solenoid valve adapted to supply control pressure to the lock-up switch valve; and a forward/reverse control solenoid valve adapted to control hydraulic pressure supplied to at least one friction element and to supply control pressure to the slip switch valve.