Air spring control system for a vehicle' s lift axle

B - Operations – Transporting – 60 – G

Patent

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Details

B60G 11/27 (2006.01) B60G 17/052 (2006.01)

Patent

CA 2467651

A lift-type axle/suspension system of a heavy-duty vehicle includes ride air springs for providing vehicle load support when the system is lowered, and one or more lift air springs for selectively raising the system when such additional load support is unnecessary or when greater vehicle maneuverability is desired. An apparatus integrates and simultaneously controls the operating systems for the lift and ride air springs. The control apparatus includes a plurality of conduits and valves which enable pressurized air from the lift air springs to be rapidly provided to the ride air springs when the system is being lowered. The additional air supplements the normal source of air from the vehicle compressed air source to ensure sufficient and timely air for smooth and efficient operation of the ride air springs without excessive buckling or folding, thus maintaining adequate overall vehicle air pressure needed for operating other vehicle components.

L'invention concerne un système de suspension/d'essieu de type relevable équipant un véhicule utilitaire lourd et comprenant des ressorts pneumatiques de marche, qui supportent la charge du véhicule lorsque le système est abaissé, et un ou plusieurs ressorts pneumatiques de levage pour relever sélectivement le système lorsque le support de charge additionnel est inutile ou lorsqu'une meilleure manoeuvrabilité du véhicule est nécessaire. Selon l'invention, un appareil comporte et commande simultanément les systèmes de fonctionnement des ressorts pneumatiques de marche et de levage. L'appareil de commande est doté d'une pluralité de conduits et de vannes qui permettent à l'air sous pression de passer rapidement des ressorts pneumatiques de levage aux ressorts pneumatiques de marche, lorsque le système est abaissé. L'air additionnel complète la source d'air normale de la source d'air comprimé du véhicule, pour fournir suffisamment d'air en temps voulu pour un fonctionnement efficace et en douceur des ressorts pneumatiques de marche, sans voilage ou rabattement excessif, maintenant ainsi une pression d'air adéquate pour l'ensemble du véhicule, laquelle est nécessaire au fonctionnement d'autres éléments dudit véhicule.

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