Anti-skid hydraulic braking systems for vehicles

Details Anti-skid hydraulic braking systems for vehicles Anti-skid hydraulic braking systems for vehicles

1982-10-07

1984-03-13

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303119, B60T 802

Patent

active

044363486

ABSTRACT:
An anti-skid braking system incorporates a modulator assembly through which fluid from a source is supplied to a brake. The modulator assembly comprises a de-boost piston working in a bore in a housing, an expander chamber connected to the brake and defined in the bore between one end of the piston and a first valve, and a second valve for controlling the application to the piston of support fluid to determine the relative position of the piston in the bore, the second valve being manipulated in response to a skid signal. The first valve is normally biassed in to a fully open position, and the operation of the first valve is controlled independently of the piston. An inhibit device is incorporated to ensure that at the termination of a skid signal first valve is maintained in a closed position at least until the piston has returned to an advanced position in which the effective volume of the expander chamber is at a minimum value.

REFERENCES:
patent: 4017126 (1977-04-01), Ohta
patent: 4095851 (1978-06-01), Ando et al.

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