Daimler Chrysler Ag

Daimler Ag

Daimler-benz Ag

Harald Ott

Klaus Land

Dietmar Bertsch

Uwe Schaupp

Rudolf Thom

Thomas Guertler

Alexander Berger

Manfred Klein

Hartwig Hellwig

Anton Knoll

Martin-Kai Riedel

A method for operating a combustion engine is disclosed. In an embodiment, the method includes: generating several sparks to ignite a fuel-air mixture in a combustion chamber by an ignition device of the combustion engine, determining a combustion duration of at least one of the sparks, detecting a deviation of an actual operation from a target operation of the combustion engine at least depending on the combustion duration, compensating for the deviation by implementing at least one measure which influences a combustion of the fuel-air mixture in the combustion chamber, determining the combustion duration of the chronological first of the sparks, allocating the first spark to a first spark type or to a second spark type depending on the combustion duration, and implementing the at least one measure if at least one value which characterizes a frequency of one of the spark types exceeds a threshold value.

Method for operating an internal combustion engine and internal combustion engine

The invention relates to a method for determining the fill quantity of an operating medium, in particular of the engine oil in a motor vehicle having a reservoir container of the operating medium and having a data processing device for determining the fill quantity of the operating medium. A fill level sensor for sensing the fill level is arranged in the reservoir container for the operating medium. In order to determine the fill level of the operating medium, operating states of the vehicle such as the temperature of the operating medium and the engine speed are also sensed. According to the invention, a characteristic variable for the engine load, for example the position of the accelerator pedal, the throttle valve position or the torque on the drive train are sensed. The fill quantity of the operating medium is determined from the sensed data by a data processing device.

Method for determining the amount of an operating medium in a motor vehicle

A sensor arrangement determines a condition and level of a liquid in a container. A first sensor has first electrodes forming a first measuring chamber communicating with the liquid and supplies a signal for determining an impedance of the first sensor and a condition of the liquid in the container. A second sensor has second electrodes forming a second measuring chamber communicating with the liquid via the first measuring chamber and supplies a signal for determining an impedance of the second sensor and a level of the liquid in the container. Electronic devices are coupled to the first and second sensors, and determine the impedance of the first and second sensors and the condition and level of the liquid in the container.

Sensor arrangement

The invention provides a sensor system which has a measuring element which has a PT1-action, such as an engine oil temperature sensor for an internal-combustion engine of a motor vehicle. A measured-value analysis unit connected behind the measuring element adds to the measured values supplied by the measuring element a correction value equal to the product of the measuring element time constant and a sliding average change value of the successively sensed measured values.

Sensor system with PT1 measuring device

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Sachsenheim, Germany

Harald Ott