Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1991-12-05
1993-02-23
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031171, B60T 1316, B60T 832
Patent
active
051884380
ABSTRACT:
The braking system comprises two hydaulic sub-circuits each connecting a driving wheel and a free wheel to a working chamber of a master cylinder (1) and includes a wheel braking anti-lock device comprising, for each of the wheels, a three-way solenoid valve (54, 53, 52, 51) normally opening communication between an inlet of fluid under pressure and the brake motor (34, 33, 32, 31) associated with the wheel, while, in the expansion phase of the anti-lock device, it closes this communication and connects the brake motor to a reservoir (21, 22) of fluid under low prressure for each sub-circuit, a switching slide (11, 12) isolating the brake motors from the working chamber of the master cylinder during the functioning of the pump (46, 45) is associated with the anti-lock device. It comprises, furthermore, a control slide (63, 61) which, at rest, determines a direct communication between the brake motor (33, 31) of the free wheel and the working chamber of the master cylinder (1) and which interrupts this communication when the pressure of the fluid in the brake motor (33, 31) of the free wheel is higher than a particular value.
REFERENCES:
patent: 4636009 (1988-01-01), Tsuru et al.
patent: 4750788 (1988-06-01), Seibert et al.
patent: 4892362 (1990-01-01), Takata
patent: 5028096 (1991-07-01), de le Broise
Bendix Europe Services Techniques
Decker Ken C.
Graham Matthew C.
Palguta Larry J.
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