Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1989-04-03
1990-02-13
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 52, 303119, 303 92, 60550, B60T 832, B60T 844
Patent
active
049001035
ABSTRACT:
A brake system having anti-skid control for motor vehicles has a brake booster having a brake valve and an emergency brake piston, and a master brake cylinder, combined in one housing with the brake booster having a master brake piston and two separate brake chambers, which supply brake fluid to one dynamic brake circuit and one static brake circuit (II and I), respectively. If the pressure fails, the master brake piston is mechanically actuated via the emergency brake piston. To attain a simple structure with a feedback-free brake pedal during anti-skid control, the emergency brake piston and the master brake piston are accommodated in a continuous housing bore such that the emergency brake piston forms the second defining wall for the first brake chamber, and the master brake piston rests with force on the emergency brake piston. A device for restoring the emergency brake piston upon the onset of the anti-skid control assure free mobility of the master brake piston. The brake pressure modulations are effected by a switching valve connected to the first brake chamber.
REFERENCES:
patent: 4620750 (1986-11-01), Leiber
patent: 4624108 (1986-11-01), Leiber
patent: 4678243 (1987-07-01), Leiber
patent: 4715661 (1987-12-01), Leiber
patent: 4776646 (1988-10-01), Siegel
patent: 4832416 (1989-05-01), Kaes et al.
patent: 4832417 (1989-05-01), Kehl et al.
patent: 4834467 (1989-05-01), Zirps
Butler Douglas C.
Greigg Edwin E.
Robert & Bosch GmbH
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