Brake valve with prefill chamber unloading valve

Details Brake valve with prefill chamber unloading valve Brake valve with prefill chamber unloading valve

B - Operations, Transporting

60

T

B60T 11/232 (2006.01) B60T 11/21 (2006.01) B60T 11/224 (2006.01) B60T 13/16 (2006.01)

Patent

CA 2135823

Left and right two stage brake valves communicate fluid pressure to left and right brake mechanisms, each brake valve having an inlet for receiving pressurized brake fluid, a reservoir, a stepped bore and a stepped piston. The stepped bore and the stepped piston forming a high volume prefill chamber and a high pressure chamber. A prefill drain valve communicates the prefill chambers to the reservoir only when pump pressure is available at the inlet and blocks communication between the left and right prefill chambers and between the prefill chambers and a reservoir when pump pressure is not available at the inlet.

Deux distributeurs de freinage bi-étagée gauche et droit servent à acheminer un fluide sous pression vers les mécanismes de freinage correspondants qui comportent un orifice d'admission de fluide de frein sous pression, un réservoir, un alésage à gradin et un piston à gradin. Lesdits alésage et piston forment une enceinte de préremplissage grand volume et une enceinte haute pression. Un clapet de vidange de l'enceinte de préremplissage s'ouvre sur le réservoir précité seulement lorsque le fluide à l'orifice d'admission est sous pression et bloque le passage entre les enceintes de préremplissage gauche et droit et entre celle-ci et le réservoir lorsque le fluide à l'orifice d'admission n'est pas sous pression.

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