Blended braking management in powertrain systems
First Claim
1. Method for operating a powertrain system including a torque machine coupled to a drive wheel of a vehicle, the method comprising:
- determining a regenerative braking capacity of the powertrain system; and
in response to a net operator torque request including a braking torque request;
generating a friction braking torque command to operate a friction brake system and coincidentally generating a regenerative braking torque request for the torque machine;
generating a torque command for controlling operation of the torque machine in response to the regenerative braking torque request; and
adjusting the friction braking torque command by an amount corresponding to a difference between the braking torque request and the regenerative braking torque request.
4 Assignments
0 Petitions
Accused Products
Abstract
A method for operating a powertrain system including a torque machine coupled to a drive wheel of a vehicle includes determining a regenerative braking capacity of the powertrain system. In response to a net operator torque request including a braking torque request, a friction braking torque command to operate a friction brake system and a regenerative braking torque request for the torque machine are coincidentally generated, a torque command is generated for controlling operation of the torque machine in response to the regenerative braking torque request, and the friction braking torque command is adjusted by an amount corresponding to a difference between the braking torque request and the regenerative braking torque request.
13 Citations
17 Claims
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1. Method for operating a powertrain system including a torque machine coupled to a drive wheel of a vehicle, the method comprising:
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determining a regenerative braking capacity of the powertrain system; and in response to a net operator torque request including a braking torque request; generating a friction braking torque command to operate a friction brake system and coincidentally generating a regenerative braking torque request for the torque machine; generating a torque command for controlling operation of the torque machine in response to the regenerative braking torque request; and adjusting the friction braking torque command by an amount corresponding to a difference between the braking torque request and the regenerative braking torque request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Method for controlling regenerative braking torque in a vehicle including a friction brake system and a powertrain system having a torque machine configured to generate and react tractive torque at a drive wheel of the vehicle, the method comprising:
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determining a regenerative braking capacity of the powertrain system; and in response to a net operator torque request including an operator braking torque request; generating a regenerative braking torque request for the torque machine, the regenerative braking torque request comprising a lesser one of the operator braking torque request and the regenerative braking capacity; generating a torque command for controlling operation of the torque machine in response to the regenerative braking torque request; controlling the torque machine to react tractive torque in response to the regenerative braking torque request, the reacted tractive torque equal to the regenerative braking torque request; and commanding a friction braking torque corresponding to a difference between the operator braking torque request and the regenerative braking torque request. - View Dependent Claims (11, 12, 13, 14, 15)
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16. Method for operating a powertrain system to control regenerative braking torque in a vehicle, the method comprising:
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determining a regenerative braking capacity of the powertrain system; monitoring an operator torque request; and in response to an operator torque request that includes an operator braking torque request; generating a regenerative braking torque request for operating a torque machine configured to transfer and react tractive torque at a driven wheel of the vehicle, the regenerative braking torque request comprising a lesser one of the operator braking torque request and the regenerative braking capacity; generating a torque command for operating the torque machine in response to the regenerative braking torque request; controlling the torque machine in response to the regenerative braking torque request; and commanding a friction braking torque corresponding to a difference between the operator braking torque request and the regenerative braking torque request. - View Dependent Claims (17)
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Specification