Hybrid vehicle transmission with a mechanical reverse function
AssigneeFord Global Technologies, LLC
InventorsDavid Janson, Reid Baldwin
Life of this patent
Estimating the term…
Abstract
A hybrid electric vehicle powertrain has an engine, a motor, a generator and a battery that define electro-mechanical power flow paths to vehicle traction wheels in both a forward drive operating mode and a reverse drive operating mode. The engine drives a power input element of a power-dividing gearset and the generator is connected to a reaction element of the power-dividing gearset. A torque reversing gearset drivably connects a power output element of the power-dividing gearset to final drive gearing to complement reverse driving motor torque.
Claims14
A hybrid electric vehicle powertrain comprising an engine, an electric traction motor, an electric generator and a battery;
- a power-dividing gearset, a first element of the power-dividing gearset being connected drivably to the engine, and a second element of the power-dividing gearset being connected drivably to the generator;
- a torque-reversing gearset, a first element of the torque-reversing gearset being connected drivably to a third element of the power-dividing gearset;
- final drive transfer gears connected drivably to a second element of the torque reversing gearset and to the motor;
- and
- a forward-reverse coupler clutch assembly for selectively connecting together two elements of the torque-reversing gearset during forward drive and connecting a third element of the torque-reversing gearset to ground to provide a torque reaction during reverse drive.
A hybrid electric vehicle powertrain with forward and reverse drive modes comprising an engine, an electric traction motor, an electric generator and a battery;
- a power-dividing gearset, a first element of the power-dividing gearset being connected drivably to the engine, and a second element of the power-dividing gearset being connected drivably to the generator;
- a torque-reversing gearset, a first element of the torque-reversing gearset being connected drivably to a third element of the power-dividing gearset;
- final drive transfer gears connected drivably to a second element of the torque-reversing gearset and to the motor;
- and
- a forward-reverse coupler clutch assembly for establishing a forward power flow path from the third element of the power-dividing gearset through the torque-reversing gearset during the powertrain forward drive mode and a reverse power flow path through the torque-reversing gearset during a powertrain reverse drive mode.
A hybrid electric vehicle powertrain comprising an engine, an electric traction motor, an electric generator and a battery;
- a power-dividing gearset, a first element of the power-dividing gearset being connected drivably to the engine, and a second element of the power-dividing gearset being connected drivably to the generator;
- a torque-reversing gearset, a first element of the torque-reversing gearset being connected drivably to a third element of the power-dividing gearset;
- final drive transfer gears connected drivably to the motor;
- and
- a forward-reverse coupler clutch assembly for selectively connecting the third element of the power-dividing gearset to the final drive transfer gears during forward drive and for connecting a second element of the torque-reversing gearset to the final drive transfer gears during reverse drive;
- a third element of the torque-reversing gearset being connected to ground to provide a torque reaction during reverse drive.
Dependencies are inferred from the claim text.