Vivacqua Crane
Hydraulic control circuit for a clutch actuator and cooling of a hybrid-powertrain
A hydraulic circuit for a hybrid powertrain having an engine and an electric motor. The hydraulic control circuit includes a first pressure regulating valve configured to cooperate with a shift valve for selectively communicating a hydraulic fluid to a hydraulic piston actuator of a clutch assembly for engaging the engine to a driveline. The hydraulic control circuit further includes a second pressure regulating valve configured to selectively communicate a flow of hydraulic fluid to a cooling circuit for the cooling of the electric motor and to cooperate with a check valve and the shift valve to actuate the hydraulic piston actuator during a predetermined fail mode of the first pressure regulating valve, thus providing a limp-home mode by coupling the torque output from the engine to driveline of the vehicle.
GM GLOBAL TECHNOLOGY OPERATIONS LLC
F B Y B F F F F F B B
F16H B60K Y02T B60K F16K F16H F16H F16H F16H B60Y B60W
inventional additional additional additional inventional inventional additional additional inventional additional inventional
Steven P.
Moorman