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US 12,715,300 B2Granted
Methods and system for controlling regenerative torque
AssigneeFord Global Technologies, LLC
InventorsLars Niklas Pettersson, Matthew Johnson, Brendan Diamond, Keith Weston, Andrew Lewandowski, Andrew Niedert
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for adjusting regenerative braking in response to normal loads applied to each of a vehicle's wheels coupled to an electric machine. In one example, a regenerative braking torque for a wheel may be adjusted in response to a normal load that is applied to the wheel as wheel load changes during vehicle braking.
Claims19
A vehicle operating method, comprising:
- adjusting regeneration torque of an electric machine via a controller in response to an estimated coefficient of friction between a tire and a road, a normal load on a wheel, a vertical rate of speed change of a vehicle, a longitudinal rate of speed change of the vehicle, and a lateral rate of speed change of the vehicle, where the tire is coupled to the wheel.
A vehicle system, comprising:
- an electric machine coupled to a wheel;
- and
- a controller including executable instructions stored in non-transitory memory to operate the electric machine in a regenerative braking mode and to adjust a regenerative braking torque generated via the electric machine in response to a sum of a first torque adjustment and a second torque adjustment, the first torque adjustment based on a normal load on the wheel, and the second torque adjustment being generated via adding a torque adjustment generated via a lateral slip controller torque adjustment, a longitudinal slip controller torque adjustment, and a vehicle stability controller torque adjustment.
A vehicle operating method, comprising:
- adjusting a trailer brake gain or a maximum trailer brake current via a controller in response to a requested regenerative braking amount, and
- adjusting the trailer brake gain via the controller in response to at least one of a lateral slip controller output, a longitudinal slip controller output, and a vehicle stability controller output while a brake pedal is applied.
Dependencies are inferred from the claim text.