Fuel injection apparatus

Details Fuel injection apparatus Fuel injection apparatus

2011-04-19

2011-04-19

Ganey, Steven J (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

Plunger interconnected or mounted bypass

C239S088000, C239S096000, C239S127000, C123S447000

Reexamination Certificate

active

07926736

ABSTRACT:
An apparatus for injecting fuel into an internal combustion engine having a fuel injector acted on with highly pressurized fuel actuated by means of a metering valve device that is able to control the pressure in a pressure booster control chamber so that in a pressure booster pressure chamber delimited by a pressure booster piston which can be filled via a check valve with high-pressure fuel and communicates with an injection valve member pressure chamber, the pressure booster piston increases the pressure, causing an injection valve member for injecting fuel to open. To assure a correct injection quantity even if an abrupt pressure drop occurs in the high-pressure fuel source, the pressure booster piston is situated and designed so that if a pressure drop occurs in the high-pressure fuel source, then starting from its neutral position, the pressure booster piston has the capacity to execute a pressure compensation movement by means of which the pressure in the pressure booster pressure chamber is adapted to the pressure of the high-pressure fuel source.

REFERENCES:
patent: 7066400 (2006-06-01), Brenk et al.
patent: 7461795 (2008-12-01), Magel
patent: 2002/0145056 (2002-10-01), Lenk et al.
patent: 2003/0183198 (2003-10-01), Mahr et al.
patent: 102 47 903 (2004-04-01), None
patent: 1 249 598 (2002-10-01), None

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