Fuel injection valve

Details Fuel injection valve Fuel injection valve

2006-04-25

2006-04-25

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

C239S088000, C239S533200, C239S089000, C251S129060, C123S498000

Reexamination Certificate

active

07032833

ABSTRACT:
In a fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, a piezoelectric or magnetostrictive actuator is surrounded by a compensation sleeve. The compensation sleeve is made of a material exhibiting virtually no, or negative, thermal expansion, so that the thermal expansion of the compensation sleeve and that of an upper valve-body section and/or lower valve-body section essentially corresponds to the thermal expansion of the actuator and effective transmission elements to the valve-sealing seat. The compensation sleeve, radially on the outside, is enclosed by a spring sleeve, which connects the lower valve-body section to the upper valve-body section and prestresses the compensation sleeve for pressure.

REFERENCES:
patent: 4284263 (1981-08-01), Newcomb
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patent: 0 869 278 (1998-10-01), None
patent: 1 079 101 (2001-02-01), None

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