HYDRAULIC CONTROL APPARATUS FOR HYDRAULIC TORQUE CONVERTER

摘要

A hydraulic pressure control circuit of a torque converter includes a torque converter control valve for controlling a line pressure supplied from a line regulator valve stably controlling a hydraulic pressure supplied from a hydraulic pump to be directly supplied to a fluid chamber inside a torque converter case as an operation hydraulic pressure, a reducing valve for stably controlling the hydraulic pressure, a torque converter control solenoid valve for controlling the hydraulic pressure supplied from the line regulator valve to be supplied to an engage hydraulic chamber of the lock-up clutch, and a switch valve for supplying the hydraulic pressure supplied from the reducing valve to a releasing hydraulic chamber of the lock-up clutch or exhausting the hydraulic pressure of the releasing hydraulic chamber of the lock-up clutch while being controlled by a control pressure of the torque converter control solenoid valve.

主权项

1. In a torque converter for a 4-way separate chamber multi-plate clutch having a supply line and an exhaust line for supplying and exhausting an operation hydraulic pressure in a torque converter, and an engagement and releasing hydraulic chamber line for supplying and exhausting an engagement and releasing hydraulic pressure to an engage hydraulic chamber and a releasing hydraulic chamber of a lock-up clutch in the torque converter, a hydraulic pressure control circuit of the torque converter comprising:
a torque converter control valve for controlling a line pressure supplied from a line regulator valve stably controlling a hydraulic pressure supplied from a hydraulic pump to be directly supplied to a fluid chamber inside a torque converter case as an operation hydraulic pressure; a reducing valve for stably controlling the hydraulic pressure supplied from the line regulator valve to be decreased; a torque converter control solenoid valve for controlling the hydraulic pressure supplied from the line regulator valve to be supplied to an engage hydraulic chamber of the lock-up clutch; and a switch valve for supplying the hydraulic pressure supplied from the reducing valve to a releasing hydraulic chamber of the lock-up clutch or exhausting the hydraulic pressure of the releasing hydraulic chamber of the lock-up clutch while being controlled by a control pressure of the torque converter control solenoid valve.