Pressure plate stress-relief grooves for a friction element assembly in a transmission of a motor vehicle and associated method

摘要

Stress-relief grooves are provided in a pressure plate of a friction element assembly in a motor vehicle comprising a transmission. The friction element assembly includes a piston assembly provided for applying a force to a set of plates and friction members to cause torque to be transmitted through the friction element assembly. A pressure plate is supported by the housing and held in place by a snap ring mounted in a mounting groove. The pressure plate includes a first side facing the set of plates and friction members and a second side having at least one stress-relief groove configured to reduce stress in the housing at the mounting groove.

主权项

1. An automatic transmission including a friction element assembly, said friction element assembly comprising:
a housing with a mounting groove; a snap ring positioned in the mounting groove; a set of plates and friction members supported by the housing; a piston assembly for applying a force to the set of plates and friction members to cause torque to be transmitted through the friction element assembly; and a pressure plate supported by the housing and held in place by the snap ring, said pressure plate including a first side facing the set of plates and friction members and a second side having at least one cut-out region facing the snap ring, said at least one cut-out region configured to reduce stress on the housing at the mounting groove.