Abstract: A spark plug of an internal combustion engine, in particular for use in Otto-cycle gas engines, comprising an insulator body, a base central electrode, at least one ground electrode and at least one swirl chamber, wherein the electrodes of the spark plug are surrounded by a wall, which in particular is in the form of a surface of a cylinder, of the swirl chamber, wherein at least one ground electrode carrier arrangement (8) with a plurality of inwardly facing, preferably flat ground electrodes (9) or a plurality of ground electrode carriers (6) each with inwardly facing, preferably flat ground electrodes (9) is or are arranged at the wall (13) of the swirl chamber (3).

Abstract: A spark ignition internal combustion engine (1), in particular an Otto-cycle gas engine, with at least one ignition device (14) per cylinder (2), wherein at least one piston (4) has a recess (8) in the piston head and wherein the recess (8) in plan view on to the piston head is of a substantially heart-shaped shape which differs at least in a region-wise manner from a circular shape, wherein the shape of the recess (8) in a plan view on to the piston head has precisely one axis of symmetry (10).

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: An engine arrangement having a gas engine, an exhaust gas tract with an exhaust gas catalytic converter in the exhaust gas tract, a propellent gas feed tube connecting a gas supply to the engine, and a cleaning device in the gas feed line.

Abstract: Apparatus for regulating an engine parameter, in particular the output power or the speed of rotation of an internal combustion engine, wherein there are provided two or more adjustable devices by way of which the engine parameter to be regulated can be influenced. There are provided two or more separate regulators, each of which regulates a respective one of the adjustable devices in dependence on the detected actual value of the engine parameter and a predeterminable reference value. There is also provided a change-over switching device by way of which selectively one of the regulators can be activated for regulating the adjustable device associated therewith.

Abstract: A spark plug with a central electrode insulated against the plug thread having ground electrodes electrically connected to the plug thread, in which a prism-shaped cap is arranged at the end of the central electrode in the combustion chamber and the ground electrodes are parallel to the sides of the prism of the cap. The ground electrodes consist of at least one holder of a base or semi-precious metal on which a thin electrode layer of platinum or a platinum alloy is arranged facing the cap of the central electrode. The ground electrodes are configured in the form of a V-shape or a Y-shape.

Abstract: An arrangement for regulating the combustion air mixture in the case of a gas engine operating on a lean fuel, and in the induction line of which there is an air-gas mixer, a lambda regulator being provided and following which there is, for varying the combustion air proportions, a positioning device which adjusts the air-gas mixer, and also an output measuring device for ascertaining the engine output. A manometer determines the actual value of the mixture pressure upstream of the inlet valves of the engine, linked with the value for the combustion air proportions. By adjusting the combustion air proportions, it is possible to regulate the mixture pressure to the output dependent desired value for the mixture pressure as ascertained in a device within the lambda regulator.