Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1988-02-17
1988-12-27
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pipeless valves
188181C, 303 97, 303 98, 303 99, 303100, 303110, 303111, 303119, 303 92, 36442602, B60T 882, B60T 862, B60T 864, B60T 1718
Patent
active
047936622
ABSTRACT:
An anti-skid control apparatus for a vehicle braking system includes first and second fluid pressure control valve devices for controlling the brake fluid pressure of the wheel cylinders of the front and rear wheels each arranged between respective fluid pressure generating chamber of a tandem master cylinder and the associated wheel cylinder of the associated front or rear wheel; first and second wheel speed sensors associated with the front or rear wheels, respectively; and a third wheel speed sensor associated in common with the rear or front wheels. The control unit discriminates the frictionally lower one of the sides of the road on which the wheels are running, from the measuring or judging results of the skid conditions of the rear and front wheels, or of the front or rear wheels on the basis of the outputs of the first, second and third wheel speed sensors, or of the first and second wheel speed sensors, the low side being able to change over in accordance with said measuring or judging results at any time, combines logically the measuring or judging results of the skid conditions of the rear or front wheels with the measuring or judging result of the skid condition of the one front or rear wheel running on the low side for generating the instruction for controlling the first or second fluid pressure control valve device, and generates the instruction for controlling the second or first fluid pressure control valve device.
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Butler Douglas C.
Nippon A B S Ltd.
Ryther James P.
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