Brake pressure proportioning valve with an additional valve

Details Brake pressure proportioning valve with an additional valve Brake pressure proportioning valve with an additional valve

1991-03-08

1993-01-05

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

188195, 303 969, B60T 822, B60T 832

Patent

active

051764342

ABSTRACT:
The vehicle brake pressure proportioning valve subject to the load of a vehicle and controlled fluidically comprises a piston (18) sliding in a stepped bore made in a body and carrying a normally open shutter arranged between a source of fluid under pressure and an associated brake circuit, the piston (18) being movable counter to a spring under the effect of the pressure of the fluid which tends to close the shutter, and comprising furthermore a sealed control chamber (16) connected to a load sensor (10). The proportioning valve further comprises a normally open additional valve (14) arranged between the chamber (16) and the sensor (10), in order to interrupt communication between the chamber (16) and the sensor (10) during a braking operation.

REFERENCES:
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patent: 4364609 (1982-12-01), Wickham
patent: 4595243 (1986-06-01), Gaiser
patent: 4609229 (1986-09-01), Edenhofer
patent: 4652058 (1987-03-01), Runkle et al.
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patent: 4770471 (1988-09-01), Gaiser
patent: 4824180 (1989-04-01), Levrai
patent: 5028094 (1991-07-01), Levrai

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