Fuel injector with pressure booster and servo valve with...

Details Fuel injector with pressure booster and servo valve with... Fuel injector with pressure booster and servo valve with...

2005-05-10

2005-05-10

Miller, Carl S. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S467000

Reexamination Certificate

active

06889659

ABSTRACT:
A fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, having a pressure booster in which the piston divides a work chamber, acted upon permanently by fuel via a pressure source, from a pressure-relievable differential pressure chamber. A pressure change in the differential pressure chamber is effected via an actuation of a servo valve. The control chamber of the servo valve can be pressure-relieved via a relief valve and which opens or closes a hydraulic connection of the differential pressure chamber with a return. For closing the servo valve piston, the control chamber can be acted upon by a fuel volume diverted from the differential pressure chamber. The action of fuel on the control chamber is effected via lines that contain throttle restrictions. A pressure relief of the control chamber is effected via a relief valve into a return on the low-pressure side.

REFERENCES:
patent: 5622152 (1997-04-01), Ishida
patent: 6446603 (2002-09-01), Bonse et al.
patent: 6453875 (2002-09-01), Mahr et al.
patent: 6513497 (2003-02-01), Mahr et al.
patent: 6644282 (2003-11-01), Schwarz
patent: 6752325 (2004-06-01), Kropp et al.
patent: 6776138 (2004-08-01), Mahr et al.
patent: 20020088435 (2002-07-01), Kropp et al.
patent: 100 63 545 (2002-08-01), None

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