Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger
Reexamination Certificate
2006-10-17
2006-10-17
Nguyen, Dinh Q. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Unitary injection nozzle and pump or accumulator plunger
C239S089000, C239S091000, C239S092000, C239S124000, C239S533200, C123S467000, C123S446000
Reexamination Certificate
active
07121476
ABSTRACT:
A fuel injection device, which has: a nozzle needle, guided displaceably in a nozzle body, which as a function of its position opens or closes at least one injection opening, in which a control chamber, to which fuel can be delivered under pressure via an inlet throttle and from which fuel can be diverted, controlled by a control valve, via an outlet throttle, is provided at a piston face of the nozzle needle facing away from the injection opening, and in which in operation, the position of the nozzle needle is controlled by a pressure difference between the pressure in the control chamber and the pressure of the fuel at the end, toward the injection opening, of the nozzle needle, is characterized in that the nozzle needle is surrounded, over at least part of its length, during operation by fuel at high pressure, such that only in the regions of the nozzle needle near the injection opening and in the control chamber can a lower pressure, differing from the high fuel pressure, occur.
REFERENCES:
patent: 6328017 (2001-12-01), Heinz et al.
patent: 6453875 (2002-09-01), Mahr et al.
patent: 6629647 (2003-10-01), Boecking
patent: 6644281 (2003-11-01), Boehland
patent: 6659086 (2003-12-01), Rodriguez-Amaya et al.
Buehler Christoph
Butscher Christoph
Frasch Juergen
Scheurer Michael
Wehr Stephan
Greigg Ronald E.
Nguyen Dinh Q.
Robert & Bosch GmbH
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