Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1987-10-14
1988-11-08
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pipeless valves
188181C, 303 97, 303 98, 303 99, 303100, 303111, 303119, 303 92, 303116, B60T 882, B60T 864
Patent
active
047831260
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.
REFERENCES:
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patent: 3980346 (1976-09-01), Leiber
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patent: 4451096 (1984-05-01), Gygax
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patent: 4569560 (1986-02-01), Kubo
patent: 4637664 (1987-01-01), Arikawa
patent: 4740040 (1988-04-01), Arikawa
Butler Douglas C.
Nippon A B S Ltd.
Ryther James P.
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