F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 47/04 (2006.01) F02M 21/02 (2006.01) F02M 51/06 (2006.01) F16K 31/12 (2006.01)
Patent
CA 2562025
A valve (100, 300, 600, 700) is disclosed with a hydraulic transmission device (130, 330, 630, 730) that is fluidly isolated from the process fluid. The pressure of the process fluid is employed to pressurize the hydraulic fluid. In a preferred embodiment, the valve is a common rail directly actuated fuel injection valve (100, 300, 600) with a hydraulic transmission device (130, 330, 630) that is fluidly isolated from the fuel so that the hydraulic fluid can be different from the fuel. This arrangement is particularly suitable for valves that inject a gaseous fuel, but can also be beneficial for use with liquid fuels. According to the method, the hydraulic fluid is pressurizable by the fuel pressure to reduce differential pressures and leakage, in addition to assisting with operation of the hydraulic transmission device (130, 330, 630). The method further comprises detecting the position of the valve needle (110, 310, 610, 710) for more accurate control of rate of fuel or process fluid flow through the valve (100, 300, 600, 700).
L'invention concerne un dispositif à transmission hydraulique isolé fluidement du fluide du processus. La pression du fluide du processus est employée pour pressuriser le fluide hydraulique. Dans un mode de réalisation préféré, la soupape est une soupape d'injection de carburant actionnée directement en rail commun avec un dispositif à transmission hydraulique isolé fluidement du carburant de façon que le fluide hydraulique puisse être différent du carburant. Cet agencement convient particulièrement aux soupapes qui injectent un carburant gazeux, mais il peut aussi présenter des avantages si on l'utilise avec des carburants liquides. Conformément à la méthode, le fluide hydraulique non seulement est pressurisable par la pression de carburant pour réduire les pressions différentielles et les fuites mais il peut en outre contribuer au fonctionnement du dispositif à transmission hydraulique. La méthode comporte en outre une détection de la position du pointeau de soupape pour une gestion plus précise du débit de carburant ou de fluide du processus au travers de la soupape.
Ancimer Richard
Baker Mike
Clapa Damien
Mumford David
Wing Richard
Gowling Lafleur Henderson Llp
Westport Power Inc.
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