Driveline retarder with ball ramp loaded friction plates

摘要

A driveline retarder (2) coupled to a vehicle driveline where a ball ramp actuator (7) having a control plate (21) and an actuation plate (14) separated by rolling elements (19) is energized by an electrical coil (28) is used to apply a clamping load on a clutch pack (8) which frictionally couples a rotating shaft to a gerotor hydraulic pump (32) which is used to absorb rotational energy to create a braking torque on the vehicle driveline to aid in vehicle braking. <IMAGE>