Method and apparatus for adaptive control of vehicle regenerative braking
First Claim
1. A method for adaptively controlling a hybrid electric vehicle including an energy generation system, an energy storage system receiving electric current at least from the energy generation system, and at least one electric drive motor receiving current from the energy storage system, comprising:
- monitoring the status of various vehicle systems;
monitoring user inputs for removal of acceleration command inputs and application of braking inputs;
determining if the vehicle is in one of a plurality of regenerative braking modes, including determining which regenerative braking mode the vehicle is in;
determining an appropriate level of regenerative braking to be applied in a braking event, given the monitored status of vehicle systems and the determination of the regenerative braking mode;
generating a command signal to the electric drive motor to generate the determined level of regenerative braking;
determining the effect of the regenerative braking command on the status of the vehicle systems; and
adaptively generating further command signals to the electric drive motor altering the level of regenerative braking applied.
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Accused Products
Abstract
A hybrid electric vehicle having an energy generation system, an energy storage system and at least one electric motor includes a controller for controlling operation of vehicle systems. The controller monitors the status of vehicle systems and system parameters and determines the regenerative braking mode of the vehicle and the appropriate level of regenerative braking for proper vehicle operation. The controller generates commands based upon these determinations to produce regenerative braking, monitors the status to determine the effects of the regenerative braking command generated, and adaptively changes the regenerative braking command generated in response to the measured effects. A method for adaptively controlling a hybrid electric vehicle is also provided.
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Citations
21 Claims
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1. A method for adaptively controlling a hybrid electric vehicle including an energy generation system, an energy storage system receiving electric current at least from the energy generation system, and at least one electric drive motor receiving current from the energy storage system, comprising:
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monitoring the status of various vehicle systems;
monitoring user inputs for removal of acceleration command inputs and application of braking inputs;
determining if the vehicle is in one of a plurality of regenerative braking modes, including determining which regenerative braking mode the vehicle is in;
determining an appropriate level of regenerative braking to be applied in a braking event, given the monitored status of vehicle systems and the determination of the regenerative braking mode;
generating a command signal to the electric drive motor to generate the determined level of regenerative braking;
determining the effect of the regenerative braking command on the status of the vehicle systems; and
adaptively generating further command signals to the electric drive motor altering the level of regenerative braking applied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A hybrid electric vehicle, comprising:
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an energy generation system;
an energy storage system receiving electric current at least from the generation system;
at least one electric motor receiving current from the energy storage system; and
a vehicle controller that;
monitors a status of various vehicle systems;
monitors user inputs for removal of acceleration command inputs and application of braking inputs;
determines if the vehicle is in one of a plurality of regenerative braking modes, including determining which regenerative braking mode the vehicle is in;
determines an appropriate level of regenerative braking to be applied in a braking event, given the monitored status of vehicle systems and the determination of the regenerative braking mode;
generates a command signal to the electric drive motor to generate the determined level of regenerative braking;
determines an effect of the regenerative braking command on the status of the vehicle systems; and
adaptively generates further command signals to the electric drive motor altering the level of regenerative braking applied. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for adaptively controlling propulsion of a hybrid electric vehicle including an energy generation system, an energy storage system receiving electric current at least from the energy generation system, and at least one electric drive motor receiving current from the energy storage system, comprising:
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generating a first signal having a value indicative of an accelerator command to a controller;
generating a second signal having a value proportional to the first signal and indicative of a demand of the at least one electric drive motor from the controller to a motor controller;
determining if the value of the first signal is smaller than the value of the second signal;
increasing the value of a command signal to the at least one electric motor, if the value of the first signal is not smaller than the value of the second signal; and
decreasing the value of the command signal, if the value of the first signal is smaller than the value of the second signal.
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18. A hybrid electric vehicle, comprising:
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an energy generation system;
an energy storage system receiving current at least from the energy generation system;
at least one electric drive motor receiving current from the energy storage system;
at least one motor controller that controls the at least one electric drive motor;
a sensor that generates a first signal having a value indicative of an accelerator command; and
a controller that;
receives the first signal from the sensor;
generates a second signal having a value proportional to the first signal and indicative of a demand of the at least one electric drive motor and sends the second signal to the motor controller;
determines if the value of the first signal is smaller than the value of the second signal;
increases the value of a command signal to operate the at least one electric motor, if the value of the first signal is not smaller than the value of the second signal; and
decreases the value of the command signal, if the value of the first signal is smaller than the value of the second signal. - View Dependent Claims (19, 20, 21)
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Specification