Clamping device for a piesoelectric actuator of a fuel injection

Details Clamping device for a piesoelectric actuator of a fuel injection Clamping device for a piesoelectric actuator of a fuel injection

1996-08-22

1998-09-22

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

2395332, 2395333, 239584, 25112906, 310327, B05B 108

Patent

active

058102558

ABSTRACT:
A fuel injection for internal combustion engines, having a valve member which is guided so that it moves axially in a valve body and uses a sealing face provided on a combustion chamber end to open and close an injection opening on the valve body. A piezoelectric actuator includes a piezoelectric stack, which changes in length with the action of a control voltage, is coupled to the combustion chamber end of the valve member to actuate the valve member. In order to prevent an interference with a precise adjustment motion of the valve member of an unwanted length change in the piezoelectric stack, a clamping device is provided which fixes the end of the piezoelectric stack remote from the valve member in its axial position during the injection phase of the fuel injection valve, and permits an axial compensation for play at the piezoelectric stack during an injection pause.

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