| 摘要 |
The method is used to detect the beginning of combustion in an internal combustion engine ( 1 ) comprising several cylinders ( 2, 3, 4, 5 ) by means of a rotation speed signal determined for a shaft ( 6 ) of the internal combustion engine ( 1 ). A segment signal (SS), whose signal length corresponds to an integral full rotation of the shaft ( 6 ), is extracted from the rotation speed signal. A cylinder signal (ZS 1 , ZS 2 , ZS 3 , ZS 4 ), which reproduces the operational state in a cylinder ( 2, 3, 4, 5 ), is generated from the segment signal (SS). The cylinder signal (ZS 1 , ZS 2 , ZS 3 , ZS 4 ) is transformed into a cylinder frequency signal (FS 1 , FS 2 , FS 3 , FS 4 ) in an angle frequency range. Signal information indicating the beginning of combustion in the associated cylinder ( 2, 3, 4, 5 ) is extracted from the cylinder frequency signal (FS 1 , FS 2 , FS 3 , FS 4 ) at least one predefined angle frequency.
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