Fuel injection valve
AssigneeRobert Bosch GmbH
InventorsKlaus Noller, Martin Buehner
Life of this patent
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Abstract
A fuel injector, in particular for the direct injection of fuel into the combustion chamber of an internal combustion engine, includes a valve needle, which cooperates with a valve seat surface to form a sealing seat, and an armature engaging with the valve needle. The armature is arranged on the valve needle in an axially movable manner and damped by a damping element made of an elastomer. Arranged between the armature and the damping element is an intermediate ring, and the damping element rests on a flange that is connected to the valve needle by force locking. Due to the intermediate ring, the armature is supported on the valve needle in a twist-proof manner.
Claims7
A fuel injector comprising:
- a valve-seat surface;
- a valve needle cooperating with the valve-seat surface to form a sealing seat;
- an armature engaging with the valve needle, the armature being axially movable on the valve needle;
- a flange joined to the valve needle by force locking;
- a damping element composed of an elastomer, the damping element damping the armature, the damping element resting on the flange;
- and
- an intermediate ring situated between the armature and the damping element, wherein the armature, due to the intermediate ring, is supported on the valve needle in a twist-proof manner;
- wherein the intermediate ring is at least partially situated in a recess in a downstream-side end face of the armature;
- wherein the intermediate ring has a polygonal form;
- wherein the polygonal intermediate ring, by way of corners formed by the sides, engages with fuel channels cut into by the recess.
Dependencies are inferred from the claim text.