Fuel injector
AssigneeRobert Bosch GmbH
InventorMartin Bernhaupt
Life of this patent
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Abstract
A fuel injector includes an injector housing, a longitudinally movable nozzle needle, and a force sensing element. The injector housing defines a nozzle chamber, a pressure chamber, and a measuring chamber. The nozzle chamber is configured to be supplied with pressurized fuel via a feed line formed in the injector housing. The pressure chamber is configured to be hydraulically connected to the feed line. The nozzle needle is disposed in the nozzle chamber and is configured to open and to close at least one spray hole. The force sensing element is disposed in the measuring chamber and is configured to detect a pressure in the pressure chamber. The measuring chamber is separated from the pressure chamber by a diaphragm-like intermediate wall. The force sensing element supports the intermediate wall.
Claims14
A fuel injector, comprising:
- an injector housing including a nozzle body, a throttle plate, a valve plate, and a retaining body, the injector housing defining a nozzle chamber, a pressure chamber, and a measuring chamber, the nozzle chamber configured to be supplied with pressurized fuel via a feed line formed in the injector housing, the pressure chamber formed in the valve plate and delimited by the throttle plate, and the pressure chamber configured to be hydraulically connected to the feed line;
- a longitudinally movable nozzle needle disposed in the nozzle chamber and configured to open and to close at least one spray hole;
- and
- a force sensing element disposed in the measuring chamber and configured to at least indirectly detect a pressure in the pressure chamber,
- wherein the measuring chamber is separated from the pressure chamber by a diaphragm-like intermediate wall, and
- wherein the force sensing element supports the intermediate wall.
Dependencies are inferred from the claim text.