APPARATUS AND METHOD FOR CALCULATING REGENERATIVE BRAKING AMOUNT OF HYBRID ELECTRIC VEHICLE
First Claim
1. A method for calculating a regenerative braking amount of a hybrid electric vehicle, comprising:
- calculating a first possible available charging power of a motor when regenerative braking of the hybrid electric vehicle is required;
calculating a second possible charging power of the motor by using the first possible charging power of the motor;
converting the second possible charging power of the motor to a torque of a wheel axle;
calculating an available amount of regenerative braking by reflecting a coasting torque on the torque of the wheel axle;
generating a motor torque command based on the available amount of regenerative braking; and
calculating a final regenerative braking amount by monitoring a real motor torque according to the motor torque command and correcting an error.
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Accused Products
Abstract
A method for calculating a regenerative braking amount of a hybrid electric vehicle includes calculating a first possible available charging power of a motor when regenerative braking of the hybrid electric vehicle is required; calculating a second possible charging power of the motor by using the first possible charging power of the motor; converting the second possible charging power of the motor to a torque of a wheel axle; calculating an available amount of regenerative braking by reflecting a coasting torque on the torque of the wheel axle; generating a motor torque command based on the available amount of regenerative braking; and calculating a final regenerative braking amount by monitoring a real motor torque according to the motor torque command and correcting an error.
36 Citations
10 Claims
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1. A method for calculating a regenerative braking amount of a hybrid electric vehicle, comprising:
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calculating a first possible available charging power of a motor when regenerative braking of the hybrid electric vehicle is required; calculating a second possible charging power of the motor by using the first possible charging power of the motor; converting the second possible charging power of the motor to a torque of a wheel axle; calculating an available amount of regenerative braking by reflecting a coasting torque on the torque of the wheel axle; generating a motor torque command based on the available amount of regenerative braking; and calculating a final regenerative braking amount by monitoring a real motor torque according to the motor torque command and correcting an error. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for calculating a regenerative braking amount of a hybrid electric vehicle, comprising:
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a vehicle speed sensor configured to detect a vehicle speed; a brake pedal position sensor (BPS) configured to detect a position of a brake pedal; an electric brake system (EBS) configured to calculate a total braking amount based on signals output from the vehicle speed sensor and the brake pedal position sensor and control hydraulic pressure supplied to a brake cylinder of a wheel according to a braking amount of hydraulic pressure; and a hybrid controller (HCU) configured to calculate a possible charging power of a motor when regenerative braking of the hybrid electric vehicle is required, and calculate a regenerative braking amount by converting the possible charging power of the motor to a torque of a wheel axle, wherein the hybrid controller performs regenerative braking according to the regenerative braking amount and outputs a signal to the EBS for performing a hydraulic pressure braking so as to satisfy the total braking amount. - View Dependent Claims (9, 10)
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Specification