Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1994-02-17
1995-01-31
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303111, 303 87, 3031191, 303 601, B60T 832, B60T 836, B60T 848, F15B 2000
Patent
active
053853954
ABSTRACT:
The invention is concerned with a slip-controlled brake system, adapted for use in automotive vehicles, provided with a master cylinder connected to wheel brakes through main pressure conduits. The brake system is made up of hydraulic auxiliary pressure pumps, wheel sensors and electronic circuits for determining the wheel rotation pattern and for generating electrical brake pressure control signals which control electromagnetically actuable pressure fluid inlet and outlet valves provided in the pressure fluid conduits for slip control purposes. At least one volume-displacing pressure pulsation snubber cooperating with the pressure column of the two main pressure conduits is being disposed between the wheel brakes and the appertaining inlet valves of two main pressure conduits. The pressure pulsation snubber, converts the sonic energy generated in response to the valve switching frequencies in the fluid medium to kinetic energy and/or reflects the sonic energy on boundary faces of the pressure pulsation snubber, thereby minimizing the valve switching noises without affecting the pedal characteristic.
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Mehr Sicherheit beim Bremsen. In: fluid, Ausg. Oct. 1979, S.40 u.42.
Alfred Teves GmbH
Butler Douglas C.
Lewis J. Gordon
Seitter Robert P.
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