Method and apparatus for traction control (ASR)

Details Method and apparatus for traction control (ASR) Method and apparatus for traction control (ASR)

1989-07-14

1990-11-20

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

180197, 180233, 192 131, 303116, 303119, B60T 832, B60K 2816

Patent

active

049714007

ABSTRACT:
A system for traction control (ASR) and an aid for initiating movement on an incline for spinning wheels in an anti-skid brake system (ABS) having ABS multi-positional control valves between the wheel brake cylinders and the master brake cylinder. The system includes a tank chamber for receiving a volume of pressure fluid, and a recirculating pump for pumping fluid during a traction control. The driver first actuates the brake to stop the vehicle, then by switch actuation, triggers an ASR reversing valve that interrupts fluid communication with a master brake cylinder, whereupon on starting movement, the ABS control valves are triggered to relieve the brake pressure into the tank chamber and then, if a wheel is spinning, the recirculating pump for generating brake pressure and the ABS control valve acted upon it for ASR brake pressure modulation are selectively triggered.

REFERENCES:
patent: 4416347 (1983-11-01), Bertling et al.
patent: 4702337 (1987-10-01), Burckhardt et al.
patent: 4838620 (1989-06-01), Sypniewski
patent: 4872732 (1989-10-01), Stegmaier

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