Method and system for improved fuel system performance of a...

F - Mech Eng,Light,Heat,Weapons – 02 – M

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F02M 55/00 (2006.01) F02B 43/00 (2006.01) F02D 19/02 (2006.01) F02D 41/00 (2006.01) F02M 21/04 (2006.01) F02B 1/04 (2006.01)

Patent

CA 2160347

An improved gaseous fuel delivery system and method (10) to improve performance of a gaseous fuel engine (30) by variably maintaining gaseous fuel pressure to the gaseous fuel engine (30). From a storage device (12), gaseous fuel flows to fuel pressure regulator (16) that variably and dynamically reduces the fuel pressure from the storage pressure and maintains the gaseous fuel pressure at the desired controlled supply pressure. Regulator controller (20) controls the fuel pressure regulator (16) in response to signal inputs (28, 34, 44, and 54) and maintain the gaseous fuel at the controlled supply pressure. Signal inputs (28, 34, 44 and 54) used by regulator controller (20) are derived from sensors such as fuel pressure sensor (24), an engine speed and/or intake manifold pressure sensor (34), fuel temperature sensor (42), and fuel composition sensor (52). The result is substantially improved fuel system dynamic range and the ability to control gaseous fuel supply to the gaseous fuel engine to provide improved fuel metering accuracy and improved engine performance and emissions.

Procédé et système améliorés d'alimentation en carburant gazeux (10) permettant d'améliorer la performance d'un moteur (30) à carburant gazeux en maintenant de manière variable la pression du carburant destiné au moteur (30) à carburant gazeux. Le carburant gazeux s'écoule d'un réservoir (12) jusqu'à un régulateur (16) de pression du carburant qui réduit de manière variable et dynamique la pression du carburant provenant du réservoir et maintient ladite pression du carburant gazeux à la pression d'alimentation régulée désirée. Une unité (20) de commande du régulateur commande le régulateur (16) de pression du carburant en réponse à des signaux d'entrée (28, 34, 44 et 54) et maintient le carburant gazeux à la pression d'alimentation régulée. Les signaux d'entrée (28, 34, 44 et 54) qu'utilise l'unité (20) de commande du régulateur proviennent de capteurs tels que le capteur (24) de pression du carburant, le capteur (34) de vitesse du moteur et/ou de pression du collecteur d'admission, le capteur (42) de température du carburant et le capteur (52) de composition du carburant. Le résultat est une amélioration de la plage dynamique de fonctionnement du système de carburant gazeux et la capacité de réguler l'alimentation en carburant gazeux destiné au moteur à carburant gazeux qui permet d'améliorer l'exactitude du dosage du carburant et d'améliorer la performance et les émissions du moteur.

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