Torque based energy management in hybrid vehicle
AssigneeFord Global Technologies, LLC
InventorsRajit Johri, Wei Liang, Christopher Alan Lear, Mark Steven Yamazaki, Xiaoyong Wang, Ming Lang Kuang, Ryan Abraham McGee
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Abstract
A system and method for controlling a powertrain in a hybrid vehicle having an engine and a traction motor include commanding the engine to provide an engine torque corresponding with a desired performance characteristic at a current engine speed. The method additionally includes commanding the motor to provide a motor torque to compensate a difference between an operator torque request and the engine torque.
Claims14
A method of controlling a powertrain comprising:
- commanding an engine to provide an engine torque corresponding with a performance characteristic at a current engine speed;
- and
- commanding a traction motor to provide a motor torque to compensate a difference between an operator torque request and the engine torque at a current motor speed having a fixed speed relationship with the current engine speed and a selectable fixed speed relationship with a current vehicle wheel speed.
A powertrain comprising:
- an engine;
- a fraction motor having a selectively fixed speed relationship with the engine and a selectable fixed speed relationship with vehicle traction wheels;
- and
- at least one controller configured to command the engine to provide an engine torque corresponding with a performance characteristic at a current engine speed and command the motor to provide a motor torque to satisfy a difference between an operator torque request and the commanded engine torque.
A method for controlling a powertrain in a hybrid electric vehicle having an engine and a traction motor, the method comprising:
- commanding the engine to provide an engine torque corresponding with a desired powertrain performance characteristic based on a current engine speed and a driver torque request;
- and
- commanding the motor to provide a motor torque corresponding with the desired powertrain performance characteristic based on the current engine speed and the driver torque request, wherein the current engine speed has a fixed speed relationship with a current motor speed and a selectable fixed speed relationship with a vehicle fraction wheel speed.
Dependencies are inferred from the claim text.