Automatic transmission having grounded clutch with convergent cooling

摘要

A friction device includes a fixed housing and a driven member which ise rotatable about a common axis. The assembly also includes a friction disc pack operable to connect and disconnect the driven member for transferring and interrupting torque therebetween. A piston assembly is supported in the clutch housing and defines an expandable chamber. The piston assembly is responsive to the pressure of fluid in the expandable chamber to move between disengaged and engaged positions thereby actuating the pack to connect and disconnect the driven member. The pack is disposed within a grounded housing that includes a sealed circumferentially arranged opening defining a coolant chamber for supplying convergent flow cooling to the pack from the OD to the ID thereof.