Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1988-04-15
1989-04-25
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pipeless valves
303DIG3, 303DIG4, 303119, 36442602, B60T 888
Patent
active
048241830
ABSTRACT:
A dual-circuit hydraulic anti-lock braking system for an automotive vehicle having a first and a second group of wheels, including (a) a dual-circuit hydraulic braking device including a first and a second brake circuit which are independent of each other, (b) a wheel rotating condition detecting device; (c) a vehicle running condition detecting device; (d) a regulating device for regulating each of a first and second braking pressures transmitted by the first and second brake circuits, respectively, by decreasing or increasing the braking pressure for a duration of time, when the detected rotating condition of at least one wheel of each of the first and second wheel groups is brought into a predetermined relationship with the detected running condition of the vehicle so as to apply the regulated pressure to a brake cylinder associated with the wheel whose detected rotating condition is brought into the predetermined relationship with the detected running condition of the vehicle. The system further including (e) a failure detecting device for detecting a failure of each of the first and second brake circuits; and (f) a time setting device for determining the duration of time at a first value when no failure is detected, and at a second value different from the first time value when a failure is detected.
REFERENCES:
patent: 3883184 (1975-05-01), Jonner et al.
patent: 3907380 (1975-09-01), Fleischer et al.
patent: 4205884 (1980-06-01), Miyakawa et al.
patent: 4264111 (1981-04-01), Shimizu et al.
patent: 4270809 (1981-06-01), Ohmori et al.
patent: 4668023 (1987-05-01), Every et al.
patent: 4736992 (1988-04-01), Hendrickson
Akiyoshi Michio
Tsuchiya Yoshiaki
Uchida Kiyoyuki
Butler Douglas C.
Toyota Jidosha & Kabushiki Kaisha
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