Electromagnetically actuatable fuel-injection valve
AssigneeVDO Adolf Schindling AG
InventorsPiotr Szablewski, Wolfgang Sauerschell
Life of this patent
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Abstract
In a fuel-injection valve, an armature (7) having upper and lower guide surfaces (12, 13) is arranged within a valve housing (1). Via the upper guide surface (12), the armature (7) is guided in a guide borehole (15) of the valve housing (1) directly below the magnet winding (3) of the fuel-injection valve. In this way the losses of magnetic flux are very small.
Claims7
An electromagnetically actuatable fuel-injection valve for injection systems of internal-combustion engines, comprising a valve housing wth a fixed magnet winding, a soft-iron core disposed within the valve housing and surrounded by the magnet winding;
- and
- an armature which is arranged coaxially with and facing said core, there being a working air gap between the core and the armature permitting displacement of the armature, the armature comprising a valve closure element which controls an outlet of the valve, the armature including upper and lower guide surfaces for guiding the armature within the valve housing, the lower guide surface being located close to the valve closure element;
- and wherein
- the valve housing has a guide bore, and the upper guide surface of the armature is located directly below the magnet winding and is guided within the guide bore of the valve housing;
- the valve further comprising
- a guide element which is seated, sealing towards the valve outlet, in a coaxial inner bore of the valve housing which is open towards the valve outlet;
- and wherein
- said lower guide surface of the armature is guided by said guide element;
- the valve further comprising
- a spacer disk located between an upper face surface of the guide element and a shoulder of the valve housing, which shoulder is directed towards the outlet of the injection valve, there being a valve seat provided on the guide element for receiving said valve closure element.
An electromagnetically actuatable fuel-injection valve according to claim 8, wherein
- the valve housing is provided, directly below the magnet winding, with an inwardly facing annular disk within which the guide bore is disposed coaxially to the soft-iron core.
Dependencies are inferred from the claim text.