Robert Boschgmbh

Marco Gangi

Udo Schulz

Gerit Edler Von Schwertfuehrer

Andreas Huber

Matthias Mrosik

Johannes-J&ouml;rg Rueger

Andreas Pfaeffle

Eduard Moser

Marco Graf

Jens-Holger Barth

Joerg Reineke

Mirko Schinzel

Kai Sutter

Michael Schueller

Jens Bloemker

Andreas Juergen Rohatschek

Martin Wiedmann

A method for carrying out a control device monitoring, a program flow control being implemented for at least one event-synchronous process in the control device monitoring. The monitoring module is developed for carrying out a control device monitoring, A program flow control is implemented for at least one event-synchronous process in the control device monitoring.

Method for monitoring control devices

A method for operating an internal combustion engine, in which fuel is injected using an injection device into a combustion chamber of a cylinder of the internal combustion engine, a fuel quantity to be injected being ascertained as a function of individual properties of the injection device, and in which functional monitoring is performed, in which an actual torque is ascertained on the basis of performance quantities of the internal combustion engine and monitored for a deviation from a permissible torque. The individual properties of the injection device are taken into consideration when ascertaining the actual torque, where the functional monitoring is improved.

Method for operating an internal combustion engine, taking into consideration the individual properties of the injection devices

A method for operating an internal combustion engine, in which fuel is injected into a combustion chamber of a cylinder of the internal combustion engine in at least two partial injections, and in which an actual torque supplied by the internal combustion engine is ascertained from operating variables of the internal combustion engine, this actual torque being compared to an admissible torque, and an error response being initiated if the actual torque is at a predefined ratio to the admissible torque. In the ascertainment of the actual torque, taking into consideration a torque efficiency of the respective partial injection is provided, whereby a more accurate monitoring of the actual torque is made possible.

Method for operating an internal combustion engine

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

A method and device for testing a fuel metering system. A control unit checks the injector contacts during the initialization phase prior to starting up the fuel metering system. For the test, the injectors are activated by the control unit, and the current values and/or voltage values are evaluated to detect errors. The control unit controls the fuel metering process during operation.

Method and device for testing a fuel metering system

In an internal combustion engine, fuel is injected directly into a combustion chamber by an injector that has a piezoactuator. An electrical charge conveyed to and/or removed from the piezoactuator is ascertained by a method that is calibrated at least once during an operating time span of the internal combustion engine. To allow the calibration to be carried out or performed as often as possible, the method for ascertaining the electrical charge transferred to and/or removed from the piezoactuator may be calibrated during at least one triggering off-time (dtK) of the piezoactuator while the internal combustion engine is operating.

Method, computer program, and open- and/or closed-loop control unit for operating an internal combustion engine, and internal combustion engine

A method and a device are described for detecting a fault current across a piezoelectric actuator ( ) of an injector or its high voltage supply lead ( ). Because the fault current upon contact with a person, for example, is relatively small compared to the useful current that charges or discharges the actuator, direct measurement of the current is not reliable. Therefore, it is suggested that, during the injection or in an injection pause, when the piezoelectric actuator ( ) is charged, the voltage variation or a change in voltage (dU) be measured and the difference be compared to a predefined threshold value (S). When the threshold value (S) is exceeded, a fault message is produced, the voltage source is shut off, and/or the piezoelectric actuator ( ) is discharged. The measured fault can be weighted using a counting algorithm. The method thus provides maximum protection upon contact, in particular for service personnel.

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Esslingen, Germany

Marco Gangi