Fuel Injection valve
AssigneeRobert Bosch GmbH
InventorFerdinand Reiter
Life of this patent
Estimating the term…
Abstract
A fuel injector, in particular for direct injection of fuel into the combustion chamber of a mixture-compressing, spark-ignited internal combustion engine, comprises an armature that coacts with a magnet coil, and comprises a valve needle, joined to the armature, on which is provided a valve-closure member that, together with a valve seat surface, forms a sealing seat. The valve needle has, downstream from the armature, a clamping sleeve whose axial position on the valve needle determines the height of a pre-stroke gap configured between the armature and an engaging flange that is joined nonpositively to the valve needle, the clamping sleeve being of tubular configuration and having a slit extending in the axial direction.
Claims9
A fuel injector, comprising:
- a magnet coil;
- an armature that coacts with the magnet coil;
- a valve-closure member;
- a valve-seat surface;
- a valve needle that is in working engagement with the armature and on which is provided the valve-closure member, the valve-closure member together with the valve-seat surface forming a sealing seat;
- a first armature stop provided on the valve needle downstream from the armature;
- and
- a second armature stop provided on the valve needle, wherein:
- the first armature stop includes a clamping sleeve having a slit extending in an axial direction, and
- an adjustable axial position of the clamping sleeve on the valve needle determines a height of a pre-stroke gap configured between the armature and the second armature stop.
Dependencies are inferred from the claim text.