Abstract: The invention relates to a method for producing combustible gas for gas engines from associated gas obtained during oil production, the associated gas containing methane, ethane, propane, hydrocarbons having more than three carbon atoms, and optionally propene, wherein a gaseous fraction and a liquid fraction are obtained by partially condensing the associated gas, wherein the condensation process is performed under such pressure and temperature conditions that the liquid phase is substantially free from methane, ethane, propane, and optionally propene, and that substantially the entire methane, ethane, propane, and optionally propene are contained in the gaseous phase.

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: A method of and an apparatus for ascertaining a knock intensity signal of an internal combustion engine, wherein an electrical light signal corresponding to the light emission in the combustion chamber is obtained by way of an optical sensor which extends into the combustion chamber, and by way of a photodetector, and then evaluated, wherein firstly the first derivative of the electrical light signal in respect of time is formed and a knock intensity signal is obtained therefrom.

Abstract: An arrangement for determining the parameters of an internal combustion engine, in particular an Otto engine operating with gaseous fuels, has at least one optical sensor for observing the emission of light caused by the combustion in a combustion chamber of the internal combustion engine and at least one photodetector for converting the light emitted into electric signals which are processed in an evaluation unit. In order to achieve a rapid and accurate regulation, the evaluation unit has an arrangement for determining the maximum or mean intensity of the light emitted during each combustion cycle on the basis of the corresponding electric signal. The evaluation unit further has a regulating unit which regulates at least one engine parameter depending on the intensity maxima.

Abstract: An arrangement for determining the parameters of an internal combustion engine, in particular an Otto engine operating with gaseous fuels, has at least one optical sensor for observing the emission of light caused by the combustion in a combustion chamber of the internal combustion engine and at least one photodetector for converting the light emitted into electric signals which are processed in an evaluation unit. In order to achieve a rapid and accurate regulation, the evaluation unit has an arrangement for determining the maximum or mean intensity of the light emitted during each combustion cycle on the basis of the corresponding electric signal. The evaluation unit further has a regulating unit which regulates at least one engine parameter depending on the intensity maxima.