Regenerative brake apparatus of hybrid vehicle and method thereof
First Claim
1. A regenerative braking apparatus of a vehicle, comprising:
- an engine that supplies power to front wheels of the vehicle;
a hybrid starting generator (HSG) that starts the engine and generates electrical energy by operating as a power generator with the engine in operation;
an engine clutch that is disposed between the engine and a transmission and selectively transmits the power from the engine to the front wheels;
a motor that supplies power to rear wheels of the vehicle and generates electrical energy by operating as a power generator during braking of the vehicle;
a battery that stores the electrical energy generated by the HSG and the motor; and
a controller that causes a friction braking torque to be generated at the front wheels when a necessary braking torque at the front wheels is larger than a regenerative braking torque at the front wheels, and that causes a friction braking torque to be generated at the rear wheels when a necessary braking torque at the rear wheels is larger than a regenerative braking torque at the rear wheels, during braking of the vehicle, whereinthe regenerative braking torque at the front wheels is set to the smaller one of;
a) the necessary braking torque at the front wheels and b) a regenerative braking torque available at the front wheels−
(a friction torque*a current gear ratio of the transmission), andthe regenerative braking torque at the rear wheels is set to the smaller one of;
a) a second regenerative braking torque available through the battery and b) a second regenerative braking torque available through the motor.
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Accused Products
Abstract
A regenerative braking apparatus of a vehicle includes: an engine that supplies power to front wheels of the vehicle; a hybrid starting generator (HSG) that starts the engine; an engine clutch that is disposed between the engine and a transmission and selectively transmits power from the engine to the front wheels; a motor that supplies power to the rear wheels of the vehicle; a battery that stores electrical energy generated by the HSG and the motor; and a controller that generates friction braking torque on the front wheels when necessary braking torque of the front wheels is larger than regenerative braking torque of the front wheels, and that generates friction braking torque on the rear wheels when necessary braking torque of the rear wheels is larger than regenerative braking torque of the rear wheels, in braking of the vehicle.
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Citations
14 Claims
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1. A regenerative braking apparatus of a vehicle, comprising:
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an engine that supplies power to front wheels of the vehicle; a hybrid starting generator (HSG) that starts the engine and generates electrical energy by operating as a power generator with the engine in operation; an engine clutch that is disposed between the engine and a transmission and selectively transmits the power from the engine to the front wheels; a motor that supplies power to rear wheels of the vehicle and generates electrical energy by operating as a power generator during braking of the vehicle; a battery that stores the electrical energy generated by the HSG and the motor; and a controller that causes a friction braking torque to be generated at the front wheels when a necessary braking torque at the front wheels is larger than a regenerative braking torque at the front wheels, and that causes a friction braking torque to be generated at the rear wheels when a necessary braking torque at the rear wheels is larger than a regenerative braking torque at the rear wheels, during braking of the vehicle, wherein the regenerative braking torque at the front wheels is set to the smaller one of;
a) the necessary braking torque at the front wheels and b) a regenerative braking torque available at the front wheels−
(a friction torque*a current gear ratio of the transmission), andthe regenerative braking torque at the rear wheels is set to the smaller one of;
a) a second regenerative braking torque available through the battery and b) a second regenerative braking torque available through the motor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A regenerative braking method of a vehicle, comprising:
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calculating a necessary braking torque at front wheels of the vehicle and a necessary braking torque at rear wheels of the vehicle based on a total necessary braking torque determined in response to a braking signal of the vehicle; calculating a regenerative braking torque at the front wheels and a regenerative braking torque at the rear wheels; generating a friction braking torque at the front wheels when the necessary braking torque at the front wheels is larger than the regenerative braking torque at the front wheels; and generating a friction braking torque at the rear wheels when the necessary braking torque at the rear wheels is larger than the regenerative braking torque at the rear wheels, wherein the regenerative braking torque at the front wheels is set to the smaller one of;
a) the necessary braking torque at the front wheels and b) a regenerative braking torque available at the front wheels−
(a friction torque*a current gear ratio of the transmission), andthe regenerative braking torque at the rear wheels is set to the smaller one of;
a) a second regenerative braking torque available through the battery and b) a second regenerative braking torque available through the motor. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification