Improved electrically operated injector for gaseous fuel

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

Patent

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Details

F02M 21/02 (2006.01) F02M 51/06 (2006.01) F02M 61/18 (2006.01)

Patent

CA 2541904

An electrically operated injector (1) for feeding a gaseous fuel to a cylinder of an internal combustion engine, in particular for a motor vehicle, comprising an electromagnetic actuator (2) acting on a mechanical interceptor member (3) arranged to free or intercept a passage (4) for said fuel from a feed conduit (61) to a delivery conduit (5) connected to an outlet (6), between said delivery conduit (5) and said interceptor member (3) there being positioned a seal element (40). This latter is carried by said interceptor member (3) and has a shape tapering towards the delivery conduit (5) in order to effectively intercept said fuel gas passage (4) and minimize the area of impact with an annular end portion (43) of said delivery conduit (5).

Cette invention concerne un injecteur à commande électrique (1) alimentant en carburant gazeux un cylindre de moteur thermique (en particulier pour véhicule motorisé), comprenant un actionneur électromagnétique (2) qui agit sur un élément obturateur mécanique (3). Ledit élément (3) est conçu pour libérer ou obturer un passage (4) par lequel le carburant passe d'un conduit d'alimentation (5) à une sortie (6), un élément d'étanchéité (40) étant disposé entre ledit conduit d'alimentation (5) et ledit élément d'obturation (3). Ce dernier élément d'étanchéité, qui est maintenu par l'élément d'obturation (3), va en s'amincissant vers le conduit d'alimentation (5) afin d'obturer efficacement le passage pour carburant gazeux (4) et réduire la zone d'impact avec une partie d'extrémité annulaire (43) dudit conduit d'alimentation (5).

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