Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1989-12-26
1991-06-25
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303110, 303116, 303119, 303 92, 180197, B60T 864, B60T 832, B60T 848, B60T 888
Patent
active
050261240
ABSTRACT:
A drive-slip control device (ASR) for a road vehicle also equipped with an anti-lock system (ABS) that works on the return-flow principle. The ASR works on the principle of decelerating a vehicle wheel tending to spin by subjecting its wheel brake to pressure. During the drive-slip control mode, the return pump of the ABS, has its inlet supply take place via a precharging pump as an auxiliary-pressure source. By an ASR control valve, the affected brake unit can be shut off from the main brake line of the brake circuit of the driven vehicle wheels. A valve arrangement, which is activatable by the output pressure of the precharging pump is provided to connect the outlet non-return valve of the precharging pump, and the ASR outlet valve (connected between the brake-fluid reservoir and the return line) to a pressure-medium line subjected to brake pressure for normal braking. In the drive-slip control mode, the valving arrangement connects the pressure-medium line to the return line and the outlet of the precharging pump to the inlet of the return pump of the brake circuit. A fault detection device is also provided.
REFERENCES:
patent: 4861118 (1989-08-01), Burckhardt et al.
Butler Douglas C.
Daimler-Benz AG
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