Method for determining the force conditions at the nozzle needle of a directly driven piezo injector

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United States of America Patent

PATENT NO 9121378
APP PUB NO 20140007665A1
SERIAL NO

14006955

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Abstract

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A method is disclosed for determining the force acting on the nozzle needle of a directly driven piezo injector, in which an electrical voltage is built on the piezo actuator which drives the nozzle needle by means of a charging process. After the charging process has ended, the voltage at the piezo actuator is measured again. A voltage gradient is determined from consecutive voltage values. Conclusions of the force acting on the nozzle needle are drawn from the voltage gradients.

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Patent Owner(s)

Patent OwnerAddress
CONTINENTAL AUTOMOTIVE GMBHVAHRENWALDER STR 9 HANNOVER 30165

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hoffmann, Robert Ruhstorf/Rott, DE 54 106
Katzenberger, Michael Regensburg, DE 7 34
Ruscheinski, Simon Rain, DE 2 15

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