Abstract: In order to operate an internal combustion engine, a value of an operating variable of the internal combustion engine is determined depending on at least one measured quantity of the internal combustion engine. A test is carried out to determine whether or not the value of the operating variable is plausible depending on at least one second measured quantity of the internal combustion engine. If the value of the operating variable is implausible, a test is carried out to determine whether or not the internal combustion engine is currently being operated in lean operation. If the internal combustion engine is currently being operated in lean operation, a changeover to the quasi-stoichiometric operation of the internal combustion engine is implemented. After the changeover to the quasi-stoichiometric operation, the value of the operating variable is determined anew and tested anew. A changeover to lean operation is carried out anew if the newly determined value of the operating variable is plausible.

Abstract: A spark plug connector, in particular for large engines, includes an inductive interference suppression device having a ferromagnetic core. The inductive interference suppression device also has at least one winding, preferably a coil, and an ohmic d.c. resistance of at least 20? at 20° C.

Abstract: An internal combustion engine, in particular a stationary gas engine, comprising at least one spark plug connector plug device (2) which can be fixed to the internal combustion engine, wherein the spark plug connector plug device (2) and the fixing thereof to the internal combustion engine withstand an application of force exerted on the spark plug connector plug device of at least 1000 Newtons, preferably in the longitudinal direction of the spark plug connector plug device (2).

Abstract: A spark plug connector (2), in particular for large engines, with an inductive interference suppression device (3) which has a ferromagnetic core (14) with at least one winding (13), preferably a coil, and an ohmic d.c. resistance of at least 20 ? at 20° C.

Abstract: The invention relates to a channel-shaped connection device for electrical lines, especially signal and ignition lines, of internal combustion engines. At least one support element (2) is provided for preferably pre-assembled electrical lines (3) and components (7) and can be inserted, preferably pushed into receiving elements (4) of the channel-shaped connection device (1).

Abstract: An internal combustion engine, in particular a stationary gas engine, comprising at least one spark plug connector plug device (2) which can be fixed to the internal combustion engine, wherein the spark plug connector plug device (2) and the fixing thereof to the internal combustion engine withstand an application of force exerted on the spark plug connector plug device of at least 1000 Newtons, preferably in the longitudinal direction of the spark plug connector plug device (2).

Abstract: An ignition system is disclosed that is capable of configuring the development or pattern of the ignition spark in a freely pre-selectable manner. The system has an ignition coil that is supplied on the primary side by a high frequency source (HF Source) that is pulse width modulated. The pulse width is regulated based upon the measured actual value of the current on the secondary side of the ignition coil and upon a pre-selected reference value development of the current amplitude during an ignition spark.

Abstract: The invention relates to a channel-shaped connection device for electrical lines, especially signal and ignition lines, of internal combustion engines. At least one support element (2) is provided for preferably pre-assembled electrical lines (3) and components (7) and can be inserted, preferably pushed into receiving elements (4) of the channel-shaped connection device (1).

Abstract: Ignition system with an ignition coil that is supplied on the primary side by a high frequency source (HF source), wherein the voltage output by the HF source is pulse width modulated and a means (6) for picking up the secondary side current (actual value) is provided, wherein a regulating means (8) is provided that regulates the pulse width dependent upon the measured actual value of the current on the secondary side of the ignition coil and upon a pre-selected reference value development of the current amplitude during an ignition spark.

Abstract: Multi-cylinder stationary internal combustion engine for driving at least one generator for the production of electric current, the internal combustion engine having a control device which selectively disconnects one or more cylinders during operation according to at least one control signal.

Abstract: Ignition coil for internal combustion engines with two or more transformer stages connected in a cascade arrangement one behind another.

Abstract: A fixing sleeve (2) for a spark plug (1) comprising coolant passages (3) which are arranged in the wall of the fixing sleeve (2) and which are oriented substantially in the longitudinal direction of the spark plug, wherein the fixing sleeve (2) comprises a metallic material whose thermal conductivity is over 60 W/m° C., preferably over 80 W/m° C.

Abstract: High voltage transformer, in particular an ignition coil for a combustion engine, with a conductor section carrying a high voltage with respect to a reference potential (earth) and with at least one conductor surface in the proximity of the conductor section, and galvanically separated therefrom to which a voltage is applied, the variation of which is dependent upon the high voltage. Between the conductor surface (7, 7') and a test output (12) a non-linear electrical transmission element (13) is interconnected.