Anti-skid control apparatus for a vehicle braking system
First Claim
1. In an anti-skid control apparatus for a vehicle braking system including:
- (A) a pair of front wheels, and a pair of rear wheels;
(B) wheel speed sensors associated with said wheels, respectively;
(C) a first fluid pressure control valve device for controlling the brake fluid pressure of the wheel cylinder of one of said front wheels, arranged between a first fluid pressure generating chamber of a tandem master cylinder and said wheel cylinder of the one front wheel;
(D) a second fluid pressure control valve device for controlling the brake fluid pressure of the wheel cylinder of another of said front wheels, arranged between a second fluid pressure generating chamber of said tandem master cylinder and said wheel cylinder of the other front wheel; and
(E) a control unit receiving outputs of said wheel speed sensors for measuring or judging the skid conditions of said front and rear wheels and for generating instructions for controlling said first and second fluid pressure control valve devices;
the improvements in which said control unit discriminates the low side comprising the frictionally lower one of the sides of the road on which said wheels are running, on the basis of the measuring or judging results of the skid conditions of said rear and/or front wheels, combines logically the measuring or judging results of the skid condition of the one rear wheel running on said low side of the road, with that of the one front wheel running on the same side as said low side, for generating the instruction for controlling said first or second fluid pressure control valve device for the corresponding front wheel, and generates the instruction for controlling said second or first fluid pressure control valve device for the other front wheel, on the basis of the measuring or judging result of the skid condition of the other front wheel running on the high side comprising the frictionally higher side of the road independently of those of said rear wheels.
2 Assignments
0 Petitions
Accused Products
Abstract
An anti-skid control apparatus for diagonally connected vehicle wheels including control valve devices arranged between fluid pressure generating chambers of a tandem master cylinder and the wheel cylinders of the front wheels, respectively, and a control unit receiving outputs of speed sensors for judging the skid conditions of the wheels and for instructing the control valve devices. The control unit determines the frictionally lower side of the road on which the wheels are running, and combines logically the judging result of the skid condition of the rear wheel running on that side of the road, with that of the front wheel running on that side. The apparatus then generates instructions for controlling the first or second valve device for the corresponding front wheel, and for controlling the second or first valve device for the other front wheel, on the basis of judging the skid condition of the other front wheel running on the other side of the road independently of the rear wheels. Alternatively, the apparatus may judge skid conditions of the rear wheels and the skid condition of one front wheel running on one side to control the valve device for the corresponding front wheel, and generate instructions to control another valve device for the other front wheel after judging the skid condition of the other front wheel running on the other side of the road.
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Citations
22 Claims
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1. In an anti-skid control apparatus for a vehicle braking system including:
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(A) a pair of front wheels, and a pair of rear wheels; (B) wheel speed sensors associated with said wheels, respectively; (C) a first fluid pressure control valve device for controlling the brake fluid pressure of the wheel cylinder of one of said front wheels, arranged between a first fluid pressure generating chamber of a tandem master cylinder and said wheel cylinder of the one front wheel; (D) a second fluid pressure control valve device for controlling the brake fluid pressure of the wheel cylinder of another of said front wheels, arranged between a second fluid pressure generating chamber of said tandem master cylinder and said wheel cylinder of the other front wheel; and (E) a control unit receiving outputs of said wheel speed sensors for measuring or judging the skid conditions of said front and rear wheels and for generating instructions for controlling said first and second fluid pressure control valve devices;
the improvements in which said control unit discriminates the low side comprising the frictionally lower one of the sides of the road on which said wheels are running, on the basis of the measuring or judging results of the skid conditions of said rear and/or front wheels, combines logically the measuring or judging results of the skid condition of the one rear wheel running on said low side of the road, with that of the one front wheel running on the same side as said low side, for generating the instruction for controlling said first or second fluid pressure control valve device for the corresponding front wheel, and generates the instruction for controlling said second or first fluid pressure control valve device for the other front wheel, on the basis of the measuring or judging result of the skid condition of the other front wheel running on the high side comprising the frictionally higher side of the road independently of those of said rear wheels. - View Dependent Claims (2)
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3. In an anti-skid control apparatus for a vehicle braking system including:
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(A) a pair of front wheels, and a pair of rear wheels; (B) wheel speed sensors associated with said wheels, respectively; (C) a first fluid pressure control valve device for controlling the brake fluid pressure of the wheel cylinder of one of said front wheels, arranged between a first fluid pressure generating chamber of a tandem master cylinder and said wheel cylinder of the one front wheel; (D) a second fluid pressure control valve device for controlling the brake fluid pressure of the wheel cylinder of another of said front wheels, arranged between a second fluid pressure generating chamber of said tandem master cylinder and said wheel cylinder of the other front wheel; and (E) a control unit receiving outputs of said wheel speed sensors for measuring or judging the skid conditions of said front and rear wheels and for generating instructions for controlling said first and second fluid pressure control valve devices;
the improvements in which said control unit discriminates the low side comprising the frictionally lower one of the sides of the road on which said wheels are running, on the basis of the measuring of judging results of the skid conditions of said rear and/or front wheels, combines logically the measuring or judging results of the skid conditions of said rear wheels with the measuring or judging result of the skid condition of the one front wheel running on the low side for generating the instruction for controlling said first or second fluid pressure control valve device for the corresponding front wheel, and generates the instruction for controlling said second or first fluid pressure control valve device for the other front wheel, on the basis of the measuring or judging result of the skid condition of the other front wheel running on the high side comprising the frictionally higher side of the road independently of those of said rear wheels. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification