Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1979-04-23
1981-06-02
Miller, J. D.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303110, B60T 802
Patent
active
042708109
ABSTRACT:
A circuit arrangement for influencing the brake pressure venting phase and/or brake pressure retaining phase for an antiskid vehicle braking system when the measured velocity difference deviates from a given velocity difference during controlled braking. The velocity change is determined as a function of the wheel tendency or tendencies by measuring and differentiating the velocity value or values at the interval boundaries of an assigned time .DELTA.t of the control signals or by the assigned times of the control signals. A switching circuit, to which the brake pressure control signals, such as, the acceleration +b, deceleration -b and slip .lambda. control signals, and a signal representing the wheel tendencies, such as, either positive or negative velocity change of the sensed wheel or wheels, can be set upon drop away of a +b or -b signal. The switching circuit controls a shifting circuit which changes the assigned time .DELTA.t or some or all assigned times .DELTA.t or changes the switching times of the control signals as a function of the signal or signals indicating the wheel tendency or tendencies. Thus, the shifting circuit produces a high signal, a medium signal, or a low signal indication representing an appropriate assigned time .DELTA.t.
REFERENCES:
patent: 3833270 (1974-09-01), Gotz et al.
patent: 3863993 (1975-02-01), Fleischer et al.
patent: 4054328 (1977-10-01), Leiber et al.
patent: 4054329 (1977-10-01), Muller et al.
patent: 4077675 (1978-03-01), Leiber et al.
Gudat Wolfgang
Lindemann Klaus
Ruhnau Gerhard
Saba Manfred
Eisenzopf Reinhard J.
Miller J. D.
Sotak J. B.
WABCO Fahrzeugbremsen GmbH
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