Robert Boschgmbh

Andreas Huber

Udo Schulz

Ruediger Fehrmann

Marco Gangi

Thomas Bleile

Horst Wagner

Dirk Samuelsen

Jens Damitz

Johannes-Joerg Rueger

Volker Pitzal

Juergen Biester

Dieter Junger

Patrick Menold

Jens-Holger Barth

Marco Graf

Thomas Breitbach

Rainer Peck

Juergen Bauer

Martin Brandt

Joerg Reineke

Kai Sutter

Christian Kriechbaum

Mirko Schinzel

Volker Stuerzl

Stefan Schempp

Peter Schmitt

Jens Bloemker

Udo Lux

Kai Barnickel

Andreas Juergen Rohatschek

Lutz-Martin Fink

Andre Schoenegge

Rainer Knicker

Andreas Peisker

Peter Storch

Harald Beuschel

Martin Wiedmann

A method for diagnosing a blowoff valve in an engine system having a supercharged internal combustion engine, the blowoff valve being situated in a blowoff line around a compressor of a supercharging device, by performing the following: detecting a compressor rotational speed indication of the supercharging device; and determining a malfunction of the blowoff valve if the compressor rotational speed indication includes an oscillation after the blowoff valve is activated for opening the blowoff valve.

Method and device for diagnosing a blowoff valve for a supercharging device of an internal combustion engine

A method for assessing a method of functioning of a fuel injector in response to the application of a control voltage to at least one actuator of the fuel injector, including the steps of applying the control voltage to the at least one actuator of the fuel injector for a no-torque-generating injection into an engine, determining a fuel content in an exhaust tract disposed at an engine, comparing the determined fuel content with a specified comparison value, and assessing the method of functioning of the fuel injector based on the comparison result. Furthermore, also described is an evaluation device for assessing a method of functioning of a fuel injector in response to the application of a control voltage.

Method for assessing a method of functioning of a fuel injector in response to the application of a control voltage, and corresponding evaluation device

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 positioner includes a capacitative element with which an ohmic resistance is connected in parallel. The value of the ohmic resistance is sensed at specific points in time. To enhance operating reliability during operation of the positioner, correct functioning of the ohmic resistance is monitored, and a fault signal is outputted upon detection of a malfunction.

Method and device for operating an actuator with a capacitive element

A method and a device () for consistent bidirectional analysis of engine characteristics map data in an engine characteristics map are described. The engine characteristics map data represents interlinked technical variables. In this method, first a characteristic curve representing the interdependence of two of the technical variables is determined. This characteristic curve forms the basis for additional conversions in bidirectional analysis of the particular engine characteristics map.

Method and device for consistent bidirectional analysis of engine characteristics map data

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 device and a method for controlling a drive unit of a vehicle. Starting from the position of an operating element, a power determining signal may be preselected. The actuator element is controlled as a function of a filtered power determining signal. The signal is filtered with a filter having at least one high-pass filter and one low-pass filter connected in parallel. The filtering is performed so that the filtered signal has at least one corresponding pulse in a transition to a modified signal.

Method and device for controlling a drive unit of a vehicle

In an apparatus and a method for monitoring a drive unit of a vehicle and/or components allocated thereto, a torque variable is determined that characterizes the torque requirement of the drive unit and/or the allocated components. Faults are recognized on the basis of the torque variable and/or a variable on the basis of which the torque variable is determined.

Method and apparatus for monitoring a drive unit of a vehicle and/or components allocated thereto

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Steinheim, Germany

Andreas Huber