Continental Automotive Gmbh

Dirk Heinitz

Gerhard Eser

Wolfgang Moser

Martin Reisinger

A method for determining an amount of energy released in the working cycle of an internal combustion engine cylinder includes: (a) recording a time curve of the rotational speed of the engine crankshaft using tooth timings measured using a toothed sensor disc, (b) assigning each tooth timing to a working cycle of a selected cylinder, (c) determining a cylinder-specific average value from the tooth timings assigned to the selected cylinder, (d) determining cylinder-specific tooth timing deviations from the determined cylinder-specific average value, for the tooth timings assigned to each working cycle of the selected cylinder, (e) determining a cylinder-specific characteristic tooth timing by summing the determined tooth timing deviations, and (f) specifying the amount of energy released in the working cycle of the selected cylinder as a function of the determined cylinder-specific characteristic tooth timing, the amount of energy released being indirectly proportional to the determined cylinder-specific characteristic tooth timing.

Methods for checking the plausibility of a cylinder pressure sensor

Determining the amount of energy released in a cylinder of an internal combustion engine by evaluating tooth timings of a sensor disc that is connected to a crankshaft

The present disclosure teaches method for balancing cylinders in a motor vehicle including an engine which has at least two cylinders. The method may include: determining a cycle period of a cycle of the engine and a number of cycles of the engine, determining a cylinder value function for each cylinder of the engine for each cycle indicative of acceleration of a crankshaft of the engine caused by the corresponding cylinder, carrying out a signal analysis for each cylinder value function, detecting an amplitude for each signal, forming an amplitude mean value for each cylinder, detecting irregular running of the engine on the basis of the amplitude mean values, and compensating for the detected irregular running of the engine.

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Undorf, Germany

Dirk Heinitz