Apparatus for synchronizing the rpm of drive wheels of a motor v

Details Apparatus for synchronizing the rpm of drive wheels of a motor v Apparatus for synchronizing the rpm of drive wheels of a motor v

1988-03-03

1989-02-21

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

180197, 180244, 303 93, 303110, 303113, 303117, 303 98, B60K 2816, B60T 832

Patent

active

048059650

ABSTRACT:
In a so-called starting aid for motor vehicles, synchronism in the rpm of the drive wheels during starting is provided by feeding a brake pressure derived from the rpm difference of the drive wheels into the wheel brake cylinder associated with the wheel having the higher rpm. To this end, one brake pressure controller having a control piston and a valve is installed in each brake line to the wheel brake cylinders of at least two wheel brakes. The control pistons are actuated in opposite directions via a final control element to which a control signal derived from the rpm difference is supplied. Upon displacement, whichever control piston is driven closes the valve and feeds brake pressure into the associated wheel brake cylinder. In order that the starting aid will have a high control speed and a small structural volume, the final control element is embodied as an electric control motor.

REFERENCES:
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patent: 3893535 (1975-07-01), Burckhardt et al.
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patent: 4401182 (1983-08-01), Pollman
patent: 4571010 (1986-02-01), Dittner et al.
patent: 4575161 (1986-03-01), Vanzant et al.
patent: 4589511 (1986-05-01), Leiber
patent: 4653815 (1987-03-01), Agarwal et al.
Journal "fluid", Jan. 1984, p. 11.

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