Hydraulic braking system for an automotive vehicle

Details Hydraulic braking system for an automotive vehicle Hydraulic braking system for an automotive vehicle

1989-07-28

1991-01-22

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

605471, 188358, 303 13, 303 52, 303113, 303119, 303 601, B60T 1314

Patent

active

049866133

ABSTRACT:
A hydraulic braking system for an automotive vehicle having a power source for generating a hydraulic power pressure, a reservoir, a master cylinder, a hydraulic booster for actuating the master cylinder in response to depression of a brake pedal and a plurality of wheel brake cylinders for braking respective road wheels, which are divided into a first group of wheel brake cylinders communicating with the master cylinder and a second group of wheel brake cylinders communicating with the hydraulic booster. An auxiliary cylinder is disposed between the master cylinder and the first group of wheel brake cylinders to which a hydraulic braking pressure from the master cylinder is directly applied in its inoperative condition, and it increases the hydraulic braking pressure in response to depression of the brake pedal in its operative condition which is made when the hydraulic power pressure, for example, is less than the hydraulic braking pressure by a predetermined difference. Control structure is connected to the auxiliary cylinder and allows the auxiliary cylinder in its operative condition when the hydraulic braking pressure, for example, is less than a predetermined value.

REFERENCES:
patent: 3883189 (1975-05-01), Braun
patent: 3910645 (1975-10-01), Takeuchi et al.
patent: 4720151 (1988-01-01), Belart et al.
patent: 4730877 (1988-03-01), Seibert et al.
patent: 4755008 (1988-07-01), Imoto et al.
patent: 4874207 (1989-10-01), Nishii et al.

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