Fuel injection device according to the solid-state energy storage principle for internal combustion engines

US5469828A · kind A · utility

Assignee

• Ficht GmbH · DE

Inventors

• Wolfgang Heimberg · Ebersberg, DE
• Wolfram Hellmich · Munich, DE
• Franz Kogl · Kaufbeuren, DE
• Paul Malatinszky · Bulle, CH

Key dates

• Filing date: Sep 2, 1994
• Grant date: Nov 28, 1995
• Expiry date: Sep 2, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

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.