Dual piston strut

B - Operations – Transporting – 60 – G

Patent

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Details

B60G 17/04 (2006.01) B60G 17/018 (2006.01) B60G 17/056 (2006.01) B60G 17/08 (2006.01) F16F 5/00 (2006.01) F16F 9/46 (2006.01)

Patent

CA 2125135

A vehicular suspension system incorporates, at each wheel (14), a liquid spring (12) which internally utilizes a compressible liquid to generate spring and damping forces that yieldingly resist vertical wheel deflection relative to the vehicle frame. The liquid spring includes a dual piston assembly (36) which divides a main cylinder into bounce (38) and rebound (40) chambers. A rotary metering valve (80) is interposed between the bounce (38) and rebound (40) chambers for controlling the flow of compressible liquid from one chamber to the other during bounce and rebound. The dual piston assembly includes a tubular piston (48) having a modulation chamber (52) coupled in flow communication with the bounce chamber (38). The spring and damping characteristics of each liquid spring are computer adjusted during vehicle operation by modulating the bounce chamber pressure in response to sensed variations in various liquid spring and vehicle operating parameters.

Système de suspension de véhicule comprenant, à chaque roue (14), un système de ressort à liquide (12) qui utilise intérieurement un liquide compressible pour tendre et détendre le ressort qui cède sous le déplacement vertical de la roue par rapport au châssis du véhicule. Le ressort à liquide comprend un ensemble double piston (36) divisant un cylindre principal en deux chambres, soit une chambre de bond (38) et une chambre de rebond (40). Une soupape de dosage (80) est située entre les chambres de bond (38) et de rebond (39) pour contrôler le flux du liquide compressible d'une chambre à l'autre pendant les bonds et les rebonds. L'ensemble double piston comprend un piston tubulaire (48) doté d'une chambre de modulation (52) par laquelle le flux passe dans la chambre de bond (38). Un ordinateur règle la tension et la détente de chaque ressort à liquide pendant que le véhicule est en marche par la modulation de la pression dans la chambre de bond en fonction des fluctuations dans les divers paramètres captés relativement au ressort à liquide et au fonctionnement du véhicule.

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