Controlled gerotor actuated pre-trans parallel hybrid

摘要

A pre-transmission unit for a hybrid drive system includes an input shaft adapted to be driven by an internal combustion engine. An electric motor includes a rotor fixed for rotation with an output shaft, and a stator fixed to a housing. A multi-plate clutch is positioned in the housing to drivingly interconnect the input shaft and the rotor. The clutch includes a piston for applying an input force to the clutch plates. A pump is positioned in the housing and includes an input member fixed for rotation with the rotor. The pump provides pressurized fluid to the piston. A valve regulates the fluid pressure applied to the piston and varies the torque transferred by the clutch.

主权项

1. A pre-transmission unit for a hybrid drive system, comprising:
a housing; a pre-transmission input shaft adapted to be driven by an internal combustion engine; an output shaft; an electric motor including a rotor fixed for rotation with a hub, the hub being fixed for rotation with the output shaft and including a cavity, and the electric motor further including a stator fixed to the housing; a multi-plate clutch positioned in the housing and drivingly interconnecting the pre-transmission input shaft and the rotor, the clutch including a piston disposed in the cavity of the hub for applying an input force to the clutch plates; a pump positioned in the housing and including a first pump member fixed to the housing and a second pump member rotatably driven by the hub, the pump providing pressurized fluid through an outlet port in fluid communication with the cavity and to the piston in response to rotation of the second pump member relative to the first pump member, the outlet port being in fluid communication with a passageway extending through the hub and the housing to a valve inlet; and a valve including an internal passageway interconnecting the valve inlet and a valve outlet, the valve outlet being in fluid communication with a sump in the housing, and wherein a battery provides energy to the electric motor and a controller, and the controller provides a signal to the valve causing the valve to open or close the internal passageway interconnecting the valve inlet and the valve outlet for regulating the fluid pressure applied to the cavity containing the piston and varying the torque transferred by the clutch.