Method and system for controlling vehicle braking
First Claim
1. A method for controlling braking in a vehicle having an energy storage system, a regenerative braking component, and a friction braking component, the method comprising the steps of:
- providing regenerative braking;
determining an amount of propulsion torque resulting from the regenerative braking if the energy storage system cannot accept additional electrical energy; and
providing friction braking based in part upon the amount of propulsion torque if the energy storage system cannot accept a predetermined amount of additional electrical energy.
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Accused Products
Abstract
Methods and systems for controlling braking in a vehicle are provided, for example in a vehicle in which regenerative braking is provided using a motor capable of providing regenerative braking on one axle or wheel that does not have a friction brake component. If it is determined that the energy storage system of the vehicle cannot accept additional electrical energy created by the regenerative braking, the electrical energy is transferred to another location such as a motor on another axle or wheel, resulting in a propulsion torque on that axle. In order to maintain the total desired braking consistent with the driver command, friction braking is provided on the axle the regenerative braking energy is transferred to using a friction braking component, based in part upon the amount of propulsion torque, when the energy storage system cannot accept additional electrical energy.
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Citations
20 Claims
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1. A method for controlling braking in a vehicle having an energy storage system, a regenerative braking component, and a friction braking component, the method comprising the steps of:
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providing regenerative braking; determining an amount of propulsion torque resulting from the regenerative braking if the energy storage system cannot accept additional electrical energy; and providing friction braking based in part upon the amount of propulsion torque if the energy storage system cannot accept a predetermined amount of additional electrical energy. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for controlling braking in a vehicle having an energy storage system, the system comprising:
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a motor configured to provide regenerative braking based on regenerative braking instructions; a friction braking component configured to provide friction braking based on friction braking instructions; and a controller coupled to the motor and the friction braking component and configured to; provide the regenerative braking instructions to the motor; determine an amount of propulsion torque resulting from the regenerative braking if the energy storage system cannot accept a predetermined amount of additional electrical energy; and provide the friction braking instructions to the friction braking component based in part upon the amount of propulsion torque if the energy storage system cannot accept the predetermined amount of additional electrical energy. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for controlling braking in a vehicle having a first axle and a second axle, the system comprising:
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an energy storage system; a motor configured to provide regenerative braking based on regenerative braking instructions; a friction braking component configured to provide friction braking based on friction braking instructions; and a controller in operative communication with the energy storage system, the motor, and the friction braking component and configured to; provide the regenerative braking instructions to the motor; determine an amount of propulsion torque resulting from regenerative braking energy if the energy storage system cannot accept additional electrical energy; and provide the friction braking instructions to the friction braking component based in part upon the amount of propulsion torque if the energy storage system cannot accept additional electrical energy. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification