HYDRAULIC CONTROL SYSTEM FOR A HYDROKINETIC TORQUE CONVERTER

摘要

A hydraulic control system for a torque converter including a lock-up clutch is disclosed in which a first or feed passageway communicates with a source of pressurized fluid and with a torque converter chamber, a second or discharge passageway communicates with the torque converter chamber and a third passageway communicates with a lock-up control or clutch chamber of the lock-up clutch. A lock-up control valve communicates with same source of pressurized fluid and with the third passageway. The first passageway is provided with a flow restrictor. With the provision of the flow restrictor, the disengagement of the lock-up clutch will be assured upon pressurization of the third passageway.