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US 6,142,395 AGranted
Fuel injection valve and method for manufacturing a fuel injection valve
AssigneeRobert Bosch GmbH
InventorFerdinand Reiter
Life of this patent
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AssigneeRobert Bosch GmbH
InventorFerdinand Reiter
Estimating the term…
In a fuel injection valve, after a preliminary adjustment of the valve seat support and immobilization thereof on the valve housing by way of a flanged rim, the effective stroke of the valve needle is measured, with the magnet coil energized, using an electrical displacement measurement system, and compared in the electronic control device to the reference stroke. In the event of a difference between these two values, the electronic control device activates a welding device which generates in an adjusting segment a first circumferential weld bead whose shrinkage upon cooling results in a decrease in the effective stroke. If, in a new measurement and adjustment cycle, the effective stroke still differs from the reference stroke, further weld beads are generated. The fuel injection valve is suitable particularly for the injection of fuel directly into the combustion chambers of internal combustion engines.
A fuel injection valve for a fuel injection system of an internal combustion engine, comprising:
A method for manufacturing a fuel injection valve for a fuel injection system of an internal combustion engine, the fuel injection valve having a valve housing, a magnet coil, an armature, a valve closure member being activated via the armature and coacting with a valve seat surface, a valve seat element having the valve seat surface and being situated in a valve seat support, and a cup spring engaging on the valve seat support, the method comprising the steps of:
Dependencies are inferred from the claim text.