Electronic stability control system for electric drive vehicle
AssigneeFord Global Technologies, LLC
InventorsWei Liang, Hai Yu, Ryan Abraham McGee, Ming Lang Kuang, Anthony Mark Phillips
Life of this patent
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Abstract
A stability control system for a vehicle that has an electric traction motor that provides torque to an axle through a differential. The traction motor responds to an instability event that is sensed by sensors on the vehicle by initially reducing the torque provided to the traction wheels to regain steering control. The traction motor then pulses increased torque in sequence with the application of braking force to provide enhanced direct yaw moment control.
Claims14
A stability control system for a vehicle comprising:
- a brake controller configured to, based on a received instability signal, provide a brake force to a first wheel;
- and
- a motor controller configured to, based on the instability signal, provide a motor torque to a second wheel on an opposite side of the first wheel wherein the brake and motor signals are provided in a coordinated time sequence.
A stability control system for a vehicle having a drivetrain with a differential that selectively provides torque to at least two wheels comprising:
- a brake controller configured to receive the instability signal and provide a brake signal to the brakes of the vehicle to apply a braking force to a brake wheel on a first side of the vehicle;
- and
- a motor controller configured to response to the instability signal and provides a motor signal to an electric motor to reduce the torque provided to a traction wheel through a differential to regain steering control;
- wherein the motor controller is configured to receive a torque increase request signal from the brake controller and to increase the torque provided through the differential to the traction wheel on a second side of the vehicle to thereby provide increased direct yaw moment control and wherein the brake and motor signals are provided in a coordinated time sequence.
A method of providing stability control for a vehicle that has a plurality of sensors, a brake controller, and a motor controller, the method comprising:
- detecting a loss of steering control in the vehicle and generating an instability event signal by the plurality of sensors;
- receiving the instability event signal by the brake controller and providing a signal to the brakes of the vehicle to apply a braking force to a brake wheel on a first side of the vehicle;
- and
- receiving a torque increase request signal by the motor controller from the brake controller and increasing the torque provided to a traction wheel on a second side of the vehicle.
Dependencies are inferred from the claim text.