Traction control braking system with a piston storage unit conne

Details Traction control braking system with a piston storage unit conne Traction control braking system with a piston storage unit conne

1991-05-20

1993-02-02

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

3031162, 3031161, B60T 1314

Patent

active

051833174

ABSTRACT:
A hydraulic dual-circuit brake system for motor vehicles comprising an antilock system (ABS) and an anti-spin control system (ASR) a four-duct hydro unit with control valves and a return pump with two separate pump elements for each brake circuit. An active piston storage unit is provided to supply brake pressure during ASR operation and each brake circuit containing at least one drive wheel is separable from a main master brake cylinder by means of a stop valve. The piston storage unit replaces the usual storage chamber at the input of a dual pump element provided for the brake circuit of the drive wheels and is activated at the beginning of anti-spin operation and is thereby filled with brake fluid from the brake fluid container. The piston storage unit is then de-activated such that the storage spring becomes operative and brake fluid is supplied via the storage piston into the pump element connected to the piston storage unit.

REFERENCES:
patent: 4714300 (1987-02-01), Heess et al.
patent: 4846532 (1989-07-01), Friedow et al.
patent: 4927213 (1990-05-01), Burgdore
patent: 5033800 (1991-07-01), Willmann

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