Fuel injection valve
AssigneeRobert Bosch GmbH
InventorFerdinand Reiter
Life of this patent
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Abstract
A fuel injection valve has a metal base body extending over its entire axial length, which includes a core/internal pole and a valve jacket. The internal pole is produced by extrusion and includes a valve inlet connection, the actual core of the electromagnetic circuit, a magnetic choke point and an area for guiding an armature. However, the valve jacket is produced by deep drawing. In addition to its function as a housing part, the valve jacket also serves as a valve seat carrier. A clearance is formed between the valve jacket and the internal pole, holding a magnet coil which is sealed by a ring gasket and is therefore dry. This fuel injection valve is suitable in particular for use in fuel injection systems of internal combustion engines with spark ignition and gas mixture compression.
Claims33
A fuel injection valve having a longitudinal valve axis, comprising:
- a magnet coil;
- an integrally formed metal internal pole;
- an integrally formed metal valve jacket radially surrounding the metal internal pole, a clearance being formed between the metal valve jacket and the metal internal pole, the magnet coil being inserted in the clearance, the magnet coil being completely surrounded by the metal valve jacket in a peripheral direction, the metal internal pole and the metal valve jacket together delimiting the clearance axially above and below the magnet coil, a first metallic contact being established substantially circumferentially between the metal internal pole and the metal valve jacket above the magnet oil and a second metallic contact being established substantially circumferentially between the metal internal pole and the metal valve jacket below the magnet coil, the metal internal pole and the metal valve jacket being fixedly connected to one another at least in one of the first metallic contact and the second metallic contact;
- an armature;
- and
- a valve closing body working together with a fixed valve seat face and being operated by the armature;
- wherein the magnet coil, the metal internal pole, the metal valve jacket and the armature form an electromagnectic circuit.
Dependencies are inferred from the claim text.