Fuel injection valve with a piezo-electric or magnetostrictive actuator
AssigneeRobert Bosch GmbH
InventorsHelmut Rembold, Gottlob Haag, Heinz Stutzenberger
Life of this patent
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Abstract
A fuel injection valve, particularly an injection valve for fuel injection equipment of internal combustion engines, having a pump piston that can be activated using a piezoelectric or magnetostrictive actuator for exerting a translatory pump motion. A spray-discharge nozzle with at least one spray-discharge opening is hydraulically connected via a fuel pressure line to the pump piston. The spray-discharge nozzle opens when the fuel pressure produced by the pump piston in the fuel pressure line exceeds a predetermined threshold. In the fuel pressure line, at least one non-return valve is arranged so that it opens in the direction towards the spray-discharge nozzle and closes in the opposite direction.
Claims13
A fuel injection valve for an internal combustion engine, comprising:
- a pump piston driven by one of a piezoelectric actuator and a magnetostrictive actuator to exert a translatory pump motion;
- a spray-discharge nozzle communicating hydraulically with the pump piston via a fuel pressure line and having at least one spray-discharge opening which opens when a fuel pressure produced by the pump piston in the fuel pressure line exceeds a predefined threshold value;
- and
- at least one check valve arranged in the fuel pressure line that opens in a direction of the spray-discharge nozzle and closes in an opposite direction.
A fuel injection valve for an internal combustion engine, comprising:
- a pump piston driven by one of a piezoelectric actuator and a magnetostrictive actuator to exert a translatory pump motion;
- a spray-discharge nozzle communicating hydraulically with the pump piston via a fuel pressure line and having at least one spray-discharge opening which opens in response to a fuel pressure produced by the pump piston in the fuel pressure line exceeding a predefined threshold value;
- and
- at least one check valve arranged in the fuel pressure line that opens in a direction of the spray-discharge nozzle and closes in an opposite direction.
Dependencies are inferred from the claim text.