Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1987-06-03
1988-04-26
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pipeless valves
188181C, 303 97, 303 98, 303 99, 303100, 303111, 303119, 303 92, B60T 882, B60T 864
Patent
active
047400404
ABSTRACT:
An anti-skid control vehicle braking apparatus with pairs of front and rear wheels; wheel speed sensors associated with the wheels; first and second fluid pressure control valve devices for respectively controlling the brake fluid pressure of the wheel cylinders of the front wheels; a control unit receiving outputs of the wheel speed sensors for measuring or judging the skid conditions of the front and rear wheels and for generating instructions for controlling the fluid pressure control valve devices; and a valve apparatus for generating a fluid pressure in accordance with the lower one of the brake fluid pressures of the front wheels controlled with the control valve devices, being arranged between the front wheel cylinders and rear wheel cylinders the control unit discriminates the frictionally lower one of the sides of the road on which the wheels are running, on the basis of the measuring or judging results of the skid conditions of rear wheels, combines logically the measuring or judging results of the skid conditions of the rear wheels with the measuring or judging result of the skid condition of one front wheel running on the lower side for generating the instruction for controlling one of fluid pressure control valve devices, and generates the instruction for controlling the other control valve device, on the basis of the measuring or judging result of the skid condition of the other front wheel running on the frictionally higher side independently of those of the rear wheels.
REFERENCES:
patent: 3674317 (1972-07-01), Mangold
patent: 3907377 (1975-09-01), Mayer
patent: 3980346 (1976-09-01), Leiber
patent: 4418966 (1983-12-01), Hattwig
patent: 4421362 (1983-12-01), Shirai et al.
patent: 4451096 (1984-05-01), Gygax
patent: 4569560 (1986-02-01), Kubo
patent: 4637664 (1987-01-01), Arikawa
Butler Douglas C.
Nippon A B S Ltd.
Ryther James P.
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