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AssigneeFicht GmbH
InventorsWolfgang Heimberg, Wolfram Hellmich, Franz Kogl, Paul Malatinszky
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The invention pertains to a fuel injection device operating according to the solid state energy storage principle, whereby a piston element mounted in a pump cylinder 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 a closed 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.
Fuel injection device operating according to the solid-state energy storage principle, whereby a piston element carried in a pump cylinder of an electromagnetically driven reciprocating pump displaces the fuel to be injected in the pump area before the injection during a virtually resistanceless acceleration phase during which the piston element stores kinetic energy, and the displacement is suddenly stopped with means interrupting the displacement, so that a pressure impulse is produced in the fuel contained in a sealed pressure chamber due to the fact that the stored kinetic energy of the piston element is directly transferred to the fuel in the pressure chamber and whereby the pressure impulse is used for the injection of fuel by an injection device, characterized by the fact that the means for interrupting the displacement and producing the pressure impulse are arranged outside the leading contact area between the piston element and the piston cylinder of the reciprocating pump.
Dependencies are inferred from the claim text.