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US 2019/0217709 A1Published application
Regenerative vehicle braking with wheel slip control and yaw stability control
AssigneeFord Global Technologies, LLC
InventorsYanan Zhao, Ming Lang Kuang, Dale Scott Crombez, Walter Joseph Ortmann, Xiaoyong Wang
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Abstract
Methods and systems are provided for operating a hybrid vehicle during operating conditions where vehicle braking is requested. In one example, regenerative braking is allocated to vehicle wheels responsive to actual and estimated vehicle yaw. Additionally, friction braking torque is allocated to vehicle wheels responsive to requested braking torque and regenerative braking torques.
Claims20
A vehicle operating method, comprising:
- receiving inputs to a controller and estimating yaw rate of a vehicle according to a model via the controller;
- providing a feedforward control parameter via the estimated yaw rate;
- and
- commanding a first electric machine to generate a first regenerative braking torque responsive to the feedforward control parameter.
1 more element
A vehicle operating method, comprising:
- assigning a first wheel as a less regenerative braking capable wheel;
- assigning a second wheel as a more regenerative braking capable wheel;
- estimating yaw rate of a vehicle via a model;
- generating a first regenerative braking torque via a first electric machine not responsive to a feedforward control parameter, the first electric machine mechanically coupled to the first wheel;
- and
- generating a second regenerative braking torque via a second electric machine responsive to the feedforward control parameter, the feedforward control parameter responsive to the estimated yaw rate, the second electric machine mechanically coupled to the second wheel.
3 more elements
A vehicle system, comprising:
- a first electric machine;
- a second electric machine;
- and
- a controller including executable instructions stored in non-transitory memory to generate a first braking torque via the first electric machine responsive to a braking stability threshold of a first wheel, and generate a second braking torque via the second electric machine responsive to actual vehicle yaw while providing the first braking torque.
1 more element
Dependencies are inferred from the claim text.