Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1985-10-22
1987-04-28
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
60555, 303110, B60T 810
Patent
active
046608974
ABSTRACT:
A brake system having a master cylinder for generating brake pressures in at least one closed brake circuit (I, II) and having an associated brake booster including a booster cylinder, a displaceable booster piston having a piston rod oriented into the master cylinder and a tappet arranged to plunge into the booster cylinder by means of a brake pedal and be displaced counter to the booster piston and is equipped with a brake valve connected to a pressure supply device, which brake valve is controllable by means of the relative movement of the tappet with respect to the booster piston. The brake system may be modified to become an anti-drive-slip apparatus via brake pressure maintenance valves built into the brake circuits (I, II), as well as a 3/3-way valve, by means of which pressure medium can be sent directly from the pressure supply device for exerting boosting action on the booster piston into the booster cylinder. Pressure in-feed causes a displacement of the booster piston and accordingly brings about the generation of brake pressures for overcoming drive slip. Once the drive slip is substantially eliminated, then the booster cylinder is relieved of pressure by means of the 3/3-way valve, so that the booster piston moves in the direction of its basic position.
REFERENCES:
patent: 3667813 (1972-06-01), Burckhardt et al.
patent: 4034566 (1977-07-01), Suketomo et al.
patent: 4123117 (1978-10-01), Adachi
patent: 4440454 (1984-04-01), Belart et al.
patent: 4526003 (1985-07-01), Leiber
Greigg Edwin E.
Reger Duane A.
Robert & Bosch GmbH
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