Hydraulic dual-circuit brake system with anti-skid and traction

Details Hydraulic dual-circuit brake system with anti-skid and traction Hydraulic dual-circuit brake system with anti-skid and traction

1991-04-08

1993-01-19

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 10, 3031161, 3031162, B60T 834, B60T 1314

Patent

active

051802163

ABSTRACT:
A hydraulic dual-circuit brake system with an anti-skid system (ABS) and traction control (ASR) for motor vehicles having a four-channel hydraulic unit with four control valves; a return pump with two separate pump elements for each brake circuit; and two-low-pressure reservoirs connected to the inlets of the pump elements. To supply brake pressure in the traction control mode, an additional hydraulic unit is used, which has a precharging pump for feeding brake fluid from a brake fluid tank into each brake circuit containing a driven wheel, and having a valve unit, which in traction control operation disconnects the pump element associated to a brake circuit having at least one driven wheel from the master brake cylinder on the outlet side. For the sake of improved dynamics during brake pressure buildup, a shutoff element, which in traction control operation disconnects the low-pressure reservoir from the precharging pump, is provided between the low-pressure reservoir and the associated pump element.

REFERENCES:
patent: 4900102 (1990-02-01), Jonner et al.
patent: 5026124 (1991-06-01), Resch

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