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US 7,528,524 B2Granted
Method and device for controlling a piezo actuator
AssigneeRobert Bosch GmbH
InventorsJohannes-Joerg Rueger, Udo Schulz, Jens-Holger Barth
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Abstract
An apparatus and a method for controlling a piezoelectric actuator are described. The voltage applied to the piezoelectric actuator is detected at a specified time. If certain variables are present, the detection of the voltage and/or the relaying of a detected voltage value is blocked.
Claims10
A method for controlling a piezoelectric actuator for injection of fuel supplied by a fuel supply rail, comprising:
- performing a voltage detection at a specified time of a voltage applied to the piezoelectric actuator in order to produce a detected voltage;
- and
- selectively blocking at least one of the voltage detection and a relaying of the detected voltage value, depending on a detected fuel pressure in the fuel supply rail.
An apparatus for controlling a piezoelectric actuator for injection of fuel supplied by a fuel supply rail, comprising:
- a voltage detection unit configured to perform a voltage detection at a specified time of a voltage applied to the piezoelectric actuator in order to produce a detected voltage;
- and
- a control unit configured for selectively blocking at least one of the voltage detection and a relaying of the detected voltage value, depending on a detected fuel pressure in the fuel supply rail.
Dependencies are inferred from the claim text.