Hydraulic dual-circuit brake system

Details Hydraulic dual-circuit brake system Hydraulic dual-circuit brake system

1991-03-19

1993-01-19

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

3031161, B60T 832

Patent

active

051802155

ABSTRACT:
A hydraulic dual-circuit brake system with an anti-skid system and traction control in motor vehicles which has a four-channel hydraulic unit with electromagnetic control valves and a return pump having two separate pump elements. For supplying brake pressure during traction control, an additional hydraulic unit is provided, which has a charging valve for connecting the brake fluid tank to a pump element, which pump element is assigned to a brake circuit containing at least one driven wheel, and a reversing valve for alternatingly connecting this pump element to the master brake cylinder or the brake fluid tank. To provide economical brake pressure supply during traction control, the aforementioned pump element is embodied as a self-aspirating high-pressure pump, and a check valve having a flow direction toward the pump element is incorporated into the connection between the control valves disposed in the brake circuit assigned to this pump element and the inlet of the pump element.

REFERENCES:
patent: 4861118 (1989-08-01), Burckhardt et al.
patent: 4900102 (1990-02-01), Jonnes et al.

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