Hydraulic brake pressure control apparatus for motor vehicles

Details Hydraulic brake pressure control apparatus for motor vehicles Hydraulic brake pressure control apparatus for motor vehicles

1978-03-17

1979-11-27

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Inertia control

60574, 60591, 303 24C, 303 24F, B60T 814

Patent

active

041757912

ABSTRACT:
An apparatus for controlling hydraulic pressure delivered to brake cylinders for rear wheels of a motor vehicle in dependence on load states and deceleration thereof comprises a first hydraulic chamber communicated with a master brake cylinder operable by a brake pedal, a second hydraulic chamber communicated with the brake cylinders for the rear wheels, a communication passage for communicating the first and second hydraulic chambers with each other, a ball valve disposed in the first hydraulic chamber and adapted to be displaced under inertia to close the communication passage, and a differential piston having pressure receiving regions exposed in the first and second hydraulic chambers for controlling the rate of increase in the hydraulic pressure within the brake cylinders for the rear wheels relative to the increase in the hydraulic pressure within the master cylinder. The differential piston is disposed in series with the ball valve and adapted to be displaced in the direction toward the first hydraulic chamber to bear against the ball valve thereby to prevent the latter from closing the communication passage in dependence on load states of the motor vehicle.

REFERENCES:
patent: 3252740 (1966-05-01), Stelzer
patent: 3476443 (1969-11-01), Bratten
patent: 4077673 (1978-03-01), Takeshita

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