Actuator for a fuel injector of an internal combustion engine

Details Actuator for a fuel injector of an internal combustion engine Actuator for a fuel injector of an internal combustion engine

2007-02-13

2007-02-13

Keasel, Eric (Department: 3752)

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

C239S102100, C239S533200, C239S585100, C310S326000, C251S129060, C123S498000

Reexamination Certificate

active

10961293

ABSTRACT:
In order to increase the lifetime for a piezoactuator of a fuel injector and to make possible a reliable seal of the piezoactor especially for comparatively thin head plates as well a gas exchange passage running through an actuator housing (52, 54) is provided, where a sealing unit (2) placed on the head arrangement (16, 18) is provided for sealing the piezoactor (12) which features a carrier (28) on which a sealing material (30) is arranged which forms a seal around the piezo contact pins (14) and the head arrangement (16, 18) and on which a microporous gas exchanger (26) to create gas permeability of the sealing unit (24) is integrated such that any fluid which has penetrated through to the gas exchanger (26) can flow out of the gas exchanger (26) under the force of gravity.

REFERENCES:
patent: 3418980 (1968-12-01), Benson
patent: 4803393 (1989-02-01), Takahashi
patent: 6424078 (2002-07-01), Heinz
patent: 6585171 (2003-07-01), Boecking
patent: 7066399 (2006-06-01), Hohl
patent: 2006/0038031 (2006-02-01), Unruh
patent: 102 51 225 (2004-05-01), None

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