Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1987-03-30
1989-04-25
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303113, B60T 826, B60T 832
Patent
active
048241890
ABSTRACT:
A brake system with slip control provided for vehicles with front-wheel or rear-wheel drive comprises two hydraulically isolated brake circuits (I, II) to which in each case the wheel brake (31 to 34) of one front wheel (VL, VR) and one rear wheel (HL, HR) is connected. By use of a pressure-retention valve (51, 52) which is inserted in each case into the line branch (49, 50) connecting the associated main line (53, 54) to the wheel brake (31, 33) of the driven axle (HL, HR), the brake force build-up at the driven axle (HL, HR) is delayed compared to the non-driven vehicle axle (VL, VR) during a braking action. Accordingly, brake force can be attained at both vehicle axles (VL, VR and HL, HR) in the presence of low road adherence values. In vehicles equipped with drum brakes at the rear axle, the effect desired can also be attained by arranging for specially adapted barke-shoe return springs instead of pressure-retention or differential-pressure valves.
REFERENCES:
patent: 3506312 (1970-04-01), Siddall
patent: 4072361 (1978-02-01), Hales
patent: 4077673 (1978-03-01), Takeshita et al.
patent: 4111495 (1978-09-01), Peeples
patent: 4560210 (1985-12-01), Tani et al.
patent: 4685747 (1987-08-01), Belart et al.
Alfred Teves GmbH
Graham Matthew C.
Kashnikow Andres
Raden James B.
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