Importance

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Abstract

Apparatus for adjusting the basic position of a camshaft adjustment unit of an internal combustion engine, includes a first structure secured to a crankshaft and a second structure secured to a camshaft and having a camshaft-distant end surface formed with one or more form-fitting and/or force-locking force-transmitting elements. A piston reciprocates between two end positions and is so operatively connected with the first and second structures that a displacement of the piston results in a rotation of the first and second structures relative to one another. In order to position the adjustment unit in the basic position and to prevent the adjustment unit from executing a rotation relative to the camshaft after occupying the basic position, a tool is attachable to the adjustment unit which tool is formed with counterelements which complement the force-transmitting elements to effect a non-rotatable connection between the tool and the adjustment unit.

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First Claim