Patent ID: 6353786
Filing Date: 2002-03-05
Classification: B60K,B60L,B60T,B60W,Y02T,Y10S

Abstract:
A braking device of a vehicle, the vehicle having an electrical motor for driving the vehicle using a battery as a power source, comprising:a braking force calculation means for: calculating a driven-wheel braking force BFO based on an amount of activation of a brake pedal by a driver of the vehicle, setting a driving-wheel braking force BRO based on the amount of activation of the brake pedal by the driver of the vehicle, and calculating a driven-wheel minimum required braking force BFM based on the amount of activation of the brake pedal by the driver of the vehicle; a required braking force calculation means for calculating a required braking force BO=BFO+BROâˆ’BFM; a first regenerative braking calculation means for calculating a regenerative braking force BM which can be generated by the electrical motor; a second regenerative braking force calculation means for calculating a regenerative braking force BB of the power supply equivalent input to the battery; a regenerative braking force setting means for comparing the values BM and BB, and setting BM as a regenerative braking force BM of the electrical motor when BB is greater than or equal to BM, and setting BB as the regenerative braking force BM of the electrical motor when BB is smaller than BM; and a regenerative braking control means for comparing the set regenerative braking force BM and the required braking force BO, and controlling the electrical motor and a braking mechanism; wherein when BM is greater than or equal to BO, the required braking force BO is generated only by the electrical motor, while generating the driven-wheel minimum required braking force BFM; and wherein when BM is smaller than BO, the regenerative braking force BM is generated by the electrical motor, while generating the driven-wheel minimum required braking force BFM, and a remainder of the braking force BOâˆ’BM is generated by the vehicle braking mechanism in a range of the driving-wheel braking force BRO and the driven-wheel braking force BFO.