Fuel injection device according to the solid-state energy...

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

Patent

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Details

F02M 51/04 (2006.01) F01M 1/02 (2006.01) F02D 41/20 (2006.01) F02M 37/00 (2006.01) F02M 37/08 (2006.01) F02M 39/00 (2006.01) F02M 55/00 (2006.01) F02M 55/02 (2006.01) F02M 57/02 (2006.01) F02M 59/38 (2006.01) F02M 61/04 (2006.01) F02M 61/08 (2006.01) F02M 63/06 (2006.01) F02M 69/24 (2006.01) F02M 69/34 (2006.01) F02M 69/46 (2006.01) F02M 63/00 (2006.01)

Patent

CA 2127799

The invention pertains to a fuel injection device operating according to the solid-state energy storage principle, whereby a piston element mounted in a pumpcylinder of an electromagnetic reciprocating pump, displaces quantities of the fuel to be injected during a virtually resistanceless acceleration phase during which the piston element stores kinetic energy, before the ejection in the pump area. The displacement is stopped suddenly with the means for interrupting the displacement, so that a pressure impulse is generated in the fuel contained in aclosed pressure chamber by direct transfer of the stored kinetic energy of the piston element to the fuel in the pressure chamber. The pressure impulse for the ejection of fuel is used by an injection device, whereby the means for interrupting the displacement and producing the pressure impulse are arranged outside the leading liquid-tight contact area between piston element and piston cylinder of the reciprocating pump.

Un dispositif d'injection de carburant fonctionne selon le principe de l'accumulateur d'énergie à solide. Un piston alternatif (10, 14) guidé dans le cylindre d'une pompe (1) à piston alternatif entraînée par un électro-aimant refoule des portions du carburant à injecter dans la zone de la pompe, avant l'injection, pendant une phase d'accélération pratiquement sans résistance, pendant laquelle le piston alternatif (10, 14) accumule de l'énergie cinétique. Le refoulement est alors brusquement arrêté par des éléments d'interruption du refoulement (6), de sorte qu'un coup de bélier est généré dans le carburant situé dans une chambre de pression fermée par transmission directe de l'énergie cinétique accumulée par le piston alternatif (10, 14) au carburant situé dans la chambre de pression. Le coup de bélier est utilisé pour injecter le carburant à travers un dispositif d'injection à gicleur (3). Les éléments générateurs du choc de pression par interruption du refoulement sont situés à l'extérieur de la zone de contact de guidage étanche aux liquides entre le piston alternatif (10, 14) et le cylindre de la pompe (1) à piston alternatif.

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