Robert Boschgmbh

Joachim Palmer

Jens Damitz

Michael Walter

Stefan Bollinger

Matthias Schueler

Ruediger Fehrmann

Horst Wagner

Dirk Samuelsen

Michael Kessler

Alexander Schenck Zu Schweinsberg

Andreas Rupp

Thomas Steinert

Rene Zieher

Arnold Engber

Bjoern Bischoff

Peter Kappelmann

Thiebaut Beyrath

Andreas Gessler

Dietrich Beckenbauer

Zoltan Papszt

A method for determining an average segment time of an encoder wheel of an internal combustion engine, the encoder wheel being connected in rotationally fixed fashion to a crankshaft of the internal combustion engine, markings being situated along the circumference of the encoder wheel, and the crankshaft of the internal combustion engine passing through specified angular ranges during segment times, segment times being acquired, associated rotational speed values being determined from the segment times, a rotational speed curve being determined from the individual determined rotational speed values, a value of the average rotational speed being determined from the rotational speed curve, and an average segment time being determined from the value of the average rotational speed.

Method for determining an average segment time of an encoder wheel of an internal combustion engine

In the method provided herein, quantities of fuel are determined during a direct injection of a motor vehicle. In this connection, within one work cycle, test injections are carried out in two cylinders of an internal combustion engine of the motor vehicle during overrun phases, speed oscillations of moved masses of the cylinders are measured and a relative difference in quantity of the fuel quantity of the test injections within one work cycle is determined from the speed oscillations. By evaluating a relative signal between the test injections within one work cycle in the two cylinders, an intrinsic dependence of the drive train of the quantity of fuel signal is compensated.

Method for determining quantities of fuel during a direct injection of a motor vehicle

In a method for calibrating a fuel metering system including an injector of an internal combustion engine performing a pilot injection chronologically prior to a main injection, at least two test injections chronologically prior to the pilot injection are provided for the injector, the first test injection being carried out using a first activation duration, in which the injector does not yet open, at least one second test injection being carried out in a subsequent injection cycle using an activation duration which is progressively increased in each case in relation to the first test injection until a change of an operating variable of the fuel metering system or the internal combustion engine results, which activation duration corresponds to a minimum activation duration of the injector.

Method and device for zero-fuel quantity calibration of a fuel injector

The invention relates to a method for determining a gas concentration in a measuring gas by means of a gas sensor. In a first mode of operation of an internal combustion engine, in which the gas concentration in the measuring gas is known, a gas concentration signal and a pressure signal are detected. A compensation parameter of the gas sensor is determined from said signals. The thus determined compensation parameter is taken into account in at least one of the two modes of operation of the internal combustion engine for determining the gas concentration.

Method for determining a gas concentration in a measuring gas by means of a gas sensor

A method and a device for monitoring a fuel injection system are described. A manipulated variable is modified by a certain amount. A first value of a measured variable is detected prior to the modification and at least a second value is detected after the modification. An error is detected when the first value and/or the at least second value deviate from an expected value.

Method and device for monitoring a fuel injection system

A method for correcting the position of the angle marks of an incremental gear of a rotary speed sensor and/or rotary angle sensor of an internal combustion engine and to a system therefor. The method is characterized by the following steps: a) recording the angle marks using the rotary speed sensor and/or the rotary angle sensor, b) measuring the combustion chamber pressure in the respective cylinder of the internal combustion engine, c) assigning a measured pressure value to the recorded angle mark positions, d) possibly correcting the measured pressure values in a signal-conditioning device, e) storing the recorded angle mark positions with the appertaining, measured pressure values in a measured value table, f) storing of the ideal pressure values derived at the ideal angle mark positions in a reference table, g) comparing the pressure values, that were measured and possibly preprocessed in the signal-conditioning device to the ideal pressure values, h) determining deviations of the measured angle mark positions from the ideal angle mark positions, at the corresponding cylinder pressure values in an evaluation unit, and i) correcting the measured angle mark positions by the deviations determined.

Method for correcting the position of the angular marks of an incremental wheel of a rotational speed sensor and/or an angle of rotation sensor, and system therefor

A device and a method for controlling an internal combustion engine are provided, in which a first actuating variable of at least one first actuating element is adapted on the basis of a comparison between a first cylinder-specific variable characterizing the combustion process in at least one cylinder and a setpoint value for this variable. On the basis of at least one second variable, at least one deviation value for at least one additional cylinder is determined. Based on this deviation value, a second actuating variable of a second actuating element is adapted.

Method and device for operating an internal combustion engine

A method is described for determining the angle-of-rotation position (&#x3c6;) of a shaft of an internal combustion engine, in particular a crank angle (&#x3c6;) of a crankshaft, information at least about incremental angles of rotation (&#x394;&#x3c6;) of the shaft and running times (T) for each incremental angle of rotation (&#x394;&#x3c6;) being detected on the basis of signals which indicate the rotation of the shaft and are spaced with intervals between them, and stored at least temporarily the instantaneous angle-of-rotation position (&#x3c6;) being determined in the period of time between two signals by extrapolation of the angle-of-rotation position (&#x3c6;) thus detected, taking into account at least one angular velocity ({overscore (&#x3c9;)}) and/or change in angular velocity (&#x394;{overscore (&#x3c9;)}) extrapolated from the stored information. In addition, a corresponding device is also described.

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Korntal-Muenchingen, Germany

Joachim Palmer