Vehicle wheel torque control systems and methods
AssigneeFord Global Technologies, LLC
InventorsYanan Zhao, Ming Lang Kuang, Walter Joseph Ortmann
Life of this patent
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Abstract
A vehicle includes a pair of electric machines each coupled to a laterally-opposing wheel to output a wheel torque. The vehicle also includes a controller programmed to command a combined regenerative braking torque output of the electric machines based on a lesser of a braking torque limit of each individual electric machine. The controller is also programmed to command a regenerative braking torque from each electric machine to be within a predetermined torque threshold of each other in response to a yaw rate exceeding a yaw threshold.
Claims20
A vehicle comprising:
- a pair of electric machines each coupled to a laterally-opposing wheel;
- and
- a controller programmed to
- command a combined regenerative braking torque output of the electric machines based on a lesser of a braking torque limit of each individual electric machine, and
- command a regenerative braking torque from each electric machine to be within a predetermined torque threshold of each other in response to a yaw rate exceeding a yaw threshold.
A method of controlling regenerative braking comprising:
- applying a combined regenerative braking torque output for each of a first wheel and a second laterally-opposing wheel that is equal to about two times a lesser individual regenerative torque capability limit of the first wheel and the second laterally-opposing wheel, wherein the individual regenerative torque capability limit is based on the lesser of a wheel slip torque limit and an electric machine regenerative torque capability limit.
A vehicle regenerative braking system comprising:
- a pair of electric machines each coupled to a laterally-opposing vehicle wheel to control wheel torque;
- and
- a controller programmed to command a combined regenerative braking torque output at the wheels equal to about two times a braking torque limit corresponding to a lesser torque-capable wheel plus a predetermined torque buffer, and command a regenerative braking torque at each wheel to be half of the combined regenerative braking torque plus a torque vector adjustment in response to a vehicle yaw rate greater than a yaw threshold.
Dependencies are inferred from the claim text.