초록 ▼

A parameter characterizing the course of combustion is ascertained by means of a sensor, preferably an optical sensor. In order to distinguish irregular combustion processes from regular ones, the filtered signal is examined as to its symmetry relative to an imaginary axis of symmetry in the signal

A parameter characterizing the course of combustion is ascertained by means of a sensor, preferably an optical sensor. In order to distinguish irregular combustion processes from regular ones, the filtered signal is examined as to its symmetry relative to an imaginary axis of symmetry in the signal maximum. If it is thereby determined that the signal is not symmetrical with respect to this axis, then a recognition signal for irregular combustion is emitted. In order to perform this method, a symmetry pulse is generated, which marks the temporal appearance of the signal maximum. In accordance with this pulse, a characteristic variable is generated which characterizes the course of the signal before the signal maximum and another characteristic variable is generated which characterizes the course of the signal after the signal maximum, and these characteristic variables are then compared with one another.

대표청구항 ▼

Method of recognizing an irregular combustion process in an internal combustion engine (ICE) including the steps of deriving a combustion related signal representative of the course of the combustion of a combustion event in the engine; associating the combustion related signal with a predetermined

Method of recognizing an irregular combustion process in an internal combustion engine (ICE) including the steps of deriving a combustion related signal representative of the course of the combustion of a combustion event in the engine; associating the combustion related signal with a predetermined angle or angular range of rotation of a crankshaft of the engine, and comprising, in accordance with the invention, the steps of analyzing the wave form of the combustion related signal with respect to symmetry about a maximum value of the combustion related signal; and providing an output signal representative of irregular combustion process if the wave form of the combustion related signal does not have a symmetrical relationship with respect to the maximum value thereof.