Robert Boschgmbh

Jean-Luc Loutrage

Dietmar Uhlmann

Dieter Kienzler

Werner Scholten

The invention relates to a fuel injector with a holding body and a nozzle body which are joined together and which accommodate a coupler module which has a coupler body enclosed by a spring sleeve. The spring sleeve is open in a circumferential direction at a seam thereof which extends in the longitudinal direction. Either the wall thickness of the spring sleeve varies in the longitudinal direction, or a width of at least one hole geometry in the sheathing of the spring sleeve varies in the longitudinal direction.

Spring sleeve for fuel injector

A piezoelectric actuator module having at least one piezoelectric component, one actuator foot, and one actuator head is surrounded by an axially extending bush. For sealing the piezoelectric actuator module in the axial direction, the actuator foot is adjoined by a diaphragm, which extends essentially in the radial direction, is joined to the bush, and has a cross section with various radii of curvature.

Piezoelectric actuator module, and method for assembling a piezoelectric actuator module

A piezoelectric actuator module has at least one piezoelectric element, one actuator foot and one actuator head, and is surrounded by an axially extending sleeve. To seal off the piezoelectric actuator module in the axial direction, the actuator foot is adjoined by a diaphragm that extends essentially in the radial direction and is connected to the sleeve.

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Stuttgart, Germany

Jean-Luc Loutrage