Vehicle brake system
First Claim
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1. A brake system for a vehicle, comprising:
- a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver; and
a second brake system that applies a braking force to other wheels according to at least a braking state of the first brake system;
a regenerative brake apparatus that applies a braking force, by converting rotational energy of wheels into electric energy and by storing the electric energy in a battery, to the wheels which receive the braking force from one of the first brake system and the second brake system;
a first braking force calculating section that calculates the braking force of the first brake system from the braking state of the first brake system;
a demand deceleration calculating section that calculates a vehicle demand deceleration from the braking state of the first brake system;
a target braking force and regenerative braking force calculating section that calculates a target braking force of the second brake system and a regenerative braking force of the regenerative brake apparatus from the braking force of the first brake system and the vehicle demand deceleration so that the vehicle demand deceleration is achieved by the braking force of the first brake system, the target braking force and the regenerative braking force;
a target braking force and regenerative braking force correcting section that obtains a corrected target braking force and a corrected regenerative braking force by correcting the target braking force and the regenerative braking force so that a braking force distribution to a front axle and a rear axle of the vehicle does not generate a rear wheel lock prior to a front wheel lock;
a second brake system controlling section that controls the second brake system so as to generate the corrected target braking force; and
a regenerative brake apparatus controlling section that controls the regenerative brake apparatus so as to generate the corrected regenerative braking force.
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Abstract
A brake system for a vehicle is comprised of a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver, and a second brake system that apply a braking force to other wheels according to at least a braking state of the first brake system.
57 Citations
18 Claims
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1. A brake system for a vehicle, comprising:
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a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver; and a second brake system that applies a braking force to other wheels according to at least a braking state of the first brake system; a regenerative brake apparatus that applies a braking force, by converting rotational energy of wheels into electric energy and by storing the electric energy in a battery, to the wheels which receive the braking force from one of the first brake system and the second brake system; a first braking force calculating section that calculates the braking force of the first brake system from the braking state of the first brake system; a demand deceleration calculating section that calculates a vehicle demand deceleration from the braking state of the first brake system; a target braking force and regenerative braking force calculating section that calculates a target braking force of the second brake system and a regenerative braking force of the regenerative brake apparatus from the braking force of the first brake system and the vehicle demand deceleration so that the vehicle demand deceleration is achieved by the braking force of the first brake system, the target braking force and the regenerative braking force; a target braking force and regenerative braking force correcting section that obtains a corrected target braking force and a corrected regenerative braking force by correcting the target braking force and the regenerative braking force so that a braking force distribution to a front axle and a rear axle of the vehicle does not generate a rear wheel lock prior to a front wheel lock; a second brake system controlling section that controls the second brake system so as to generate the corrected target braking force; and a regenerative brake apparatus controlling section that controls the regenerative brake apparatus so as to generate the corrected regenerative braking force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A brake system for a vehicle, comprising:
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a first brake system that mechanically applies a braking force to wheels according to a master cylinder hydraulic pressure outputted from a master cylinder which receives a brake manipulation force of a driver; a second brake system that applies a braking force to other wheels according to at least a braking state of the first brake system; a regenerative brake apparatus that applies a braking force by converting rotational energy of wheels into electric energy and stores the electric energy in a battery, the regenerative brake apparatus being adapted to wheels which receive the braking force from one of the first brake system and the second brake system; a front axle braking force increasing device that is capable of increasing the braking force of a front axle independent from the first brake system; a first braking force calculating section that calculates the braking force of the first brake system from the braking state of the first brake system; a demand deceleration calculating section that calculates a vehicle demand deceleration from the braking state of the first brake system; a target braking force and regenerative braking force calculating section that calculates a target braking force of the second brake system and a regenerative braking force of the regenerative brake apparatus from the braking force of the first brake system and the vehicle demand deceleration so that the vehicle demand deceleration is achieved by the braking force of the first brake system, the target braking force and the regenerative braking force; a corrected braking force and increased quantity calculating section that obtains a corrected target braking force, a corrected regenerative braking force and a front axle braking force increasing quantity by correcting the target braking force and the regenerative braking force so that the sum of the braking force of the first brake system, the corrected target braking force, the corrected regenerative braking force and the front axle braking force increasing quantity being maintained at a value corresponding to the vehicle demand deceleration and so that a braking force distribution to a front axle and a rear axle of the vehicle does not generate a rear wheel lock prior to a front wheel lock; a second brake system controlling section that controls the second brake system so as to generate the corrected target braking force; a regenerative brake apparatus controlling section that controls the regenerative brake apparatus so as to generate the corrected regenerative braking force; and a front axle braking force increasing device controlling section that controls the front axle braking force increasing section so as to generate the front axle braking force increasing quantity. - View Dependent Claims (18)
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Specification