Ford Global Technolgoies, LLC

Lear Corporation

Thomas Chrostowski

Ming Lang Kuang

Fazal Urrahman Syed

Wei Liang

Jeffrey Allen Doering

Carol Louise Okubo

Xiaoyong Wang

William David Treharne

Scott James Thompson

Jonathan Andrew Butcher

Paul Stephen Bryan

David Crist Gabriel

Matthew D Smith

Joseph Youqing Xiang

A vehicle includes a traction motor coupled to a driveline. An engine and a generator are coupled to the driveline through a planetary gearset. A controller commands the traction motor torque based on a difference between a driver torque demand and an estimated powertrain torque. The estimated powertrain torque is based on an error between actual and estimated engine speed and an error between actual and estimated generator speed. The estimated powertrain torque may be further based on commanded or estimated engine torque and generator torque. The estimated powertrain torque may utilize a state estimator to calculate internal states based on the errors.

Power split hybrid electric vehicle motor torque control using state estimation

A control system and method for controlling a hybrid electric vehicle powertrain with mechanical and electro-mechanical power sources that use an intelligent controller adapted to reduce driveline oscillations while minimizing hybrid vehicle battery limit violations. Damping of driveline torque oscillations is accomplished and violations of battery power limits are avoided by filtering estimated engine power.

Hybrid electric vehicle control for minimizing high voltage battery power limits violations

A method and system for controlling a hybrid electric vehicle include controlling torque in a traction motor in response to a provisional motor torque that has been adjusted based on a difference between a measured traction motor speed and a calculated vehicle speed and filtered to attenuate a resonant driveline frequency.

Hybrid electric vehicle driveline active damping and transient smoothness control

A vehicle powertrain system has an engine, a damper and an electric machine configured to be selectively mechanically coupled with the engine via damper. The vehicle powertrain system also has at least one controller programmed to filter a frequency content of a speed or torque command for the electric machine corresponding to a resonant frequency of the engine, damper and electric machine to reduce resonance of the engine, damper and electric machine.

Engine speed control apparatus and method for a hybrid vehicle

A vehicle, a control system for a vehicle having a user interface, and a method of controlling a vehicle are provided. In response to input selecting an electric-only operating mode, an engine is disabled such that the vehicle is propelled by an electric machine. In response to detecting a predefined vehicle state while the electric-only operating mode is selected, the engine is re-enabled such that the vehicle is propelled by at least one of the engine and electric machine. In response to detecting an absence of the predefined vehicle state while the electric-only operating mode is selected, the engine is disabled such that the vehicle is propelled by the electric machine.

System override for user selected electric-only operation of a hybrid vehicle

In a hybrid electric vehicle (HEV), the available energy from a battery may be inadequate to drive a motor to generate additional torque sufficient for driveability upon a request for an increase in wheel torque. The motor may then be operated in a lossy, inefficient mode. When the motor operates in the lossy mode, engine power can be increased such that the sum of the engine power and the maximum available battery power may exceed requested wheel power. The increased engine power may be dissipated as heat in the motor until an increase in wheel torque is requested, whereby the motor may switch from the lossy mode back to a normal, efficient mode. By switching back to the normal mode, the excessive engine power that was being dissipated as heat in the motor may contribute to the output torque of the motor.

Vehicle response system and method

To protect against overuse of a motor, such as may be used to control seat position in an automotive vehicle, an estimated temperature of the motor is determined based on an ambient temperature, a current applied to the motor, a period of time during which the current is applied to the motor, and at least one thermal property. A voltage applied to the motor is reduced, such as by a motor controller, when the estimated motor temperature is greater than a safe operating temperature of the motor.

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Chesterfield, MI, United States of America

Thomas Chrostowski