Robert Boschgmbh

Dirk Stockmann

Rainer Moritz

Dirk Foerstner

Joerg Brueckner

Peter Kappelmann

Carsten Scholten

Matthias Illian

Joerg Winbermuehle

In a method for detecting a replacement of sheathed-element glow plugs in an internal combustion engine, an electrical parameter of the sheathed-element glow plug is determined during a driving cycle and is compared with a stored value of the same electrical parameter of the sheathed-element glow plug that was determined in a preceding driving cycle. In the driving cycle, the same electrical parameter is determined for all sheathed-element glow plugs installed in the internal combustion engine, and the determined pattern of the electrical parameter is compared with a pattern that was ascertained in a preceding driving cycle, a replacement of a sheathed-element glow plug being detected if the pattern of the driving cycle deviates from a pattern of the preceding driving cycle.

Method and device for detecting a replacement of pencil glow plugs in an internal combustion engine

With devices and methods for reducing the contamination of a sensor, a sensor or sensor element&#x2014;preferably a hot film air-mass meter&#x2014;is deactivated when a software function integrated in the electronic control unit detects a possible contamination or a media carry-in. The sensor is deactivated using a high-side switch in the voltage supply or a low-side switch in the ground connection, wherein the media carry-in detection and the switch control are carried out by the control unit or an evaluation unit in the sensor. After the sensor is deactivated, a substitute signal is optionally generated that replaces the missing output signal of the sensor.

Device and method for reducing the contamination of a sensor

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Asperg, Germany

Dirk Stockmann