Vehicle central tire inflation system

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 23/10 (2006.01) B60C 23/00 (2006.01)

Patent

CA 2077005

A tire pressure control system (10) for wheels (28) of a vehicle. The system includes an air control circuit (40) having a positive pressure air source (42), a vacuum pressure air source (44), a central control unit (46), a vehicle speed sensor (47), and a command/display console (48). The control circuit (40) includes valves (62, 64, 66, 68, 70) and a conduit assembly (74) for controlling communication of the positive and vacuum pressure air to wheel valve assemblies (14) mounted on each wheel. A vent valve (86) provides quick venting of positive air pressurein the conduit assembly (74) for effecting rapid closing of a valve device (100) in each wheel valve (14). Each wheel valve also includes a valve device (104) providing substantially unrestricted air flow from the conduit assembly (74) to the wheels when valve device (100) is open and providing restricted air flow from the wheels to the conduit assembly (74) to ensure closing of the valve device (100) when the conduit is vented.

Système de commande de la pression des pneus (10) d'un véhicule. Le système comprend un circuit de commande pour l'air (40), une source de pression d'air positive (42), une source de pression d'air négative (44), une unité de commande centrale (46), un capteur de vitesse du véhicule (47) et une console de commande et d'affichage (48). Le circuit de commande (40) comprend des valves (62, 64, 66, 68) et un conduit (74) pour contrôler la transmission de l'air sous pression positive ou négative au mécanisme de valve (14) de chaque roue. Une valve d'évacuation de l'air (86) permet une évacuation rapide de la pression d'air positive dans le conduit (74) pour fermer rapidement le mécanisme de la valve (100) de chaque roue (14). Chaque valve de roue comprend aussi un dispositif (104) qui fournit un écoulement essentiellement libre de l'air entre le conduit (74) et les roues lorsque le dispositif (100) est ouvert et un écoulement limité de l'air entre les roues et le conduit (74) pour assurer la fermeture du dispositif (100) lorsque le conduit est purgé.

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