Visteon Global Technolgoies, Inc.

Rongjun Zhang

Stephen De La Salle

Mathew Ethan Breton

Michael Larsen

Mark Leonard Hopper

The present invention provides in one embodiment a method for controlling vehicle creep control. Measurements are received from a brake pedal sensor, where the measurements are indicative of a brake pedal travel. A target creep speed value is derived based on the measurements of creep speed and the brake pedal travel. A request for wheel torque is derived based on the target creep speed. There is a determination of the difference between a measurement of vehicle creep speed and the target creep speed value. The request for wheel torque is adjusted, if the target creep speed is not equivalent to the vehicle creep speed.

Apparatus and method of controlling vehicle creep control under braking

A control system is disclosed for minimizing the driveline vibrations in a hybrid electric vehicle during engine engagement. The control system involves determining the speed of the electric motor and taking the derivative of the speed to determine the acceleration. A signal representing the acceleration is created. The acceleration signal is filtered. The filtered acceleration signal is used to calculate a feedback control term through a controller. The controller can be either a PD controller or a PID controller with a low integral gain. The feedback control term is used to adjust the output torque of the electric motor to suppress the vibrations caused by engine engagement.

Engine engagement control for a hybrid electric vehicle

The present invention includes an apparatus and a method for controlling the idle speed of a powertrain. The possible idle speed control operating modes detailed are (1) engine-torque-control/motor-speed-control, (2) engine-off/motor-speed-control, and (3) engine-speed-control/motor-torque-control. The engine-off/motor-speed-control mode is used when all conditions to turn the engine off are met. The motor is run at a speed that is determined by the ancillary demands&mdash;subject to motor or engine constraints. The engine-torque-control/motor-speed-control operating mode is used when the engine is required to be on to provide torque to various mechanically driven ancillary loads, or to charge the batteries. The engine-speed-control/motor-torque-control operating mode is used when the engine is required to be on because of conditions not related to providing torque to other components.

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Santa Rosa, CA, United States of America

Rongjun Zhang