Robert Boschgmbh

Kai Sutter

Wolfgang Stoecklein

Matthias Horn

Ruediger Weiss

Marco Beier

Thomas Pauer

Stefan Cerny

Markus Rueckle

Andreas Huber

Andreas Rettich

Wilhelm Christ

Andreas Rau

Marco Gangi

Andreas Gruenberger

Guido Bredenfeld

Joerg Reineke

Oliver Becker

Thomas Schwarz

Ulrich Schoor

Mirko Schinzel

Gerhard Lemke

Dietmar Schwuchow

Jens Bloemker

Andreas Leinberger

Henning Kreschel

Markus Stahl

Stephan Amelang

Lorenz Zerle

Marc Laetzel

Sebastian Birk

Olaf Gloss

Christoph Kessler

Alexander Villmann

Sven Siauw

Andreas Klaiber

Heinz Martin

Dieter Haecker

Martin Wiedmann

A method for operating an injection valve, in particular a fuel injector of an internal combustion engine, in which a trigger voltage is able to be applied to an actuator, designed as piezoelectric element, of the fuel injector in order to induce an injection of fluid, in particular fuel, supplied to the fuel injector via a supply system. A specifiable test voltage is applied to the actuator in a test triggering, and a fluid pressure prevailing in the supply system is detected at least during the test triggering in order to derive information about an operating state of the fuel injector and/or the actuator from the test voltage and the detected fluid pressure.

Method of operating a fuel injector

In a method for ascertaining the control voltage of a piezoelectric element, the voltage drop at the piezoelectric element following a charge process is measured and the control voltage of the piezoelectric element is inferred from this voltage drop.

Method for determining the individual control voltage of a piezoelectric element

A method for diagnosing a fuel injection device which includes a piezoelectric actuator, with which a valve element is actuated. The fuel injection device is connected to a diagnostic device which applies a defined voltage to the piezoelectric actuator. The charge introduced into the piezoelectric actuator, and from that a capacitance of the piezoelectric actuator, are ascertained by means of the diagnostic device.

Method for diagnosis in a fuel injection device comprising a piezoactuator

A method for determining the activation voltage of a piezoelectric actuator of at least one injector which is used to inject a liquid volume under high pressure into a cavity, in particular into a combustion chamber of an internal combustion engine, the activation voltage being varied as a function of the pressure used to pressurize the liquid volume. A drift of the activation voltage (voltage requirement) required for a predefined lift of a control valve of the injector is controlled on an injector-specific basis by controlling the difference between the cutoff-voltage threshold and the final steady-state voltage to a setpoint value predefined for one operating point.

Method for determining the activation voltage of a piezoelectric actuator of an injector

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Stuttgart, Germany

Kai Sutter