Fuel injection valve and a method for manufacturing a fuel injection valve
AssigneeRobert Bosch GmbH
InventorRudolf Krauss
Life of this patent
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Abstract
A fuel injection valve and a method for manufacturing the fuel injection valve serving to inject easily vaporized fuels are proposed in which the fuel injection valve includes a closing body that controls the fuel outlet and is subjected to a closing force and a nozzle holder secured on the internal combustion engine or on the suction tube. A nozzle body is displaceable within the nozzle holder against a shaped disc until such time as the closing spring supported in the inner area on the shaped disc has an initial stress which corresponds to the valve opening pressure force.
Claims9
A fuel injection valve having an axis and comprising a closing body disposed in a nozzle holder and arranged to control a fuel outlet, said closing body being suspended in the manner of a pendulum and arranged to protrude through a nozzle body and cooperate with a valve seat in said nozzle body, said closing body arranged to open in a direction counter to the force of a closing spring supported at one end on a spring plate engaging said closing body, characterized in that said closing spring rests at an opposite end on an elastically deformable shaped disc which is partially braced in an axial direction between the nozzle body and the nozzle holder and is deformed at least partially in the axial direction in such a manner that, viewed in the radial direction, outer and inner regions of the shaped disc lie in different planes, said shaped disc being axially deformable by means of axial displacement of said nozzle body whereby the force of said closing spring is variable.
A method for adjusting the operation of an injection valve having an axis and comprising a closing body disposed in a nozzle holder and arranged to control a fuel outlet, said closing body being suspended in the manner of a pendulum and arranged to protrude through a nozzle body and cooperate with a valve seat in said nozzle body, said closing body arranged to open in a direction counter to the force of a closing spring which is supported at one end on a spring plate engaging said closing body and which is supported at an opposite end on an elastically deformable shaped disc, said disc being partially braced in the axial direction between the nozzle body and the nozzle holder and being deformed at least partially in an axial direction in such a manner that, viewed in the radial direction, outer and inner regions of the shaped disc lie in different planes, wherein said method comprises the step of:
- axially displacing the nozzle body in the nozzle holder counter to the force of the shaped disc undergoing deformation until such time as the force of the closing spring corresponds to the desired valve opening pressure force.
Dependencies are inferred from the claim text.