Fuel injection valve

Details Fuel injection valve Fuel injection valve

2006-07-11

2006-07-11

Kim, Christopher (Department: 3752)

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

Reexamination Certificate

active

07073730

ABSTRACT:
A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, including a piezoelectric or magnetostrictive actuator, actuates a valve-closure member formed on a valve needle via a hydraulic coupler, the valve-closure member cooperating with a valve-seat surface to form a valve-sealing seat. The coupler includes a master piston and a slave piston which are connected to a pressure chamber, and at least one coupler-spring element which in each instance produces a prestressing force on the master piston, counter to a working direction, and on the slave piston, in a working direction. The pressure chamber of the coupler is connected to a fuel inflow in the flow-through direction to the pressure chamber via an inflow bore and a check valve.

REFERENCES:
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patent: 6776354 (2004-08-01), Cooke
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patent: 0 972 934 (2000-01-01), None
patent: WO 99/18348 (1999-04-01), None

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