Patent ID: 9506548
Filing Date: 2016-11-29
CPC Classification: F16D,F16H

Claim Text:
1. A transmission for a motor vehicle comprising: a torque converter including a lock-up clutch; a pump for supplying transmission fluid; a first valve for receiving transmission fluid from the pump; and a control valve including a control valve body and a plunger movable within the control valve body, the control valve body having a first port for receiving transmission fluid from the first valve and a second port for receiving transmission fluid from the pump, the control valve being configured so that: when the lock-up clutch is in a release mode, the plunger is in a first position within the control valve body, and the second port is closed; when the lock-up clutch enters an apply mode, the first valve is configured to send transmission fluid to the first port, the plunger reaches a second position within the control valve body, and the second port becomes partially open; and after entering and while in the apply mode, movement of the plunger back and forth along the control valve body relative to the second position controls an amount of transmission fluid entering the second port and thereby controls an apply pressure of the lock-up clutch.