Abstract: The invention relates to a method for operating a stationary power plant, wherein a fuel/air mixture is burned in an internal combustion engine and wherein the internal combustion engine drives an alternating current generator, which is connected to an energy supply network and provides energy to the energy supply network, wherein if the actual rotational speed of the alternating current generator or of the internal combustion engine exceeds a predefinable maximum value due to a failure of the energy supply network, the combustion in the internal combustion engine is stopped at least partially, while the connection to the energy supply network is maintained.

Abstract: A method includes checking whether an electromagnetically actuated gas injector arranged in an internal combustion engine between a fuel source and a combustion chamber is in the closed end position thereof. According to the method, an electric test voltage is applied to the gas injector and the discharge current generated by the electric test voltage is measured.

Abstract: A method for starting an internal combustion engine, particularly a stationary gas engine, includes driving the engine by at least one starter motor. The starting process is interrupted once the starter motor has been started if the angular acceleration of the internal combustion engine remains below a predefinable acceleration value and/or if, within a predefinable first time period, the actual rotational speed remains below a predefinable first rotational speed threshold value and/or if, within a predefinable second time period, the average rotational speed of the internal combustion engine remains below a predefinable second rotational speed threshold value. The starter motor is designed as a pneumatic starter motor and the compressed air supply thereof is controlled by a compressed air valve which can be switched between a fully opened position and a fully closed position, the pneumatic starter motor being started by the compressed air valve being fully opened.

Abstract: A laser spark plug includes a laser light-producing device and a spark plug housing at the end of which facing the combustion chamber an injection lens for injecting laser light into the combustion chamber of an internal combustion engine is arranged. The spark plug housing includes a fastening zone for fastening the laser spark plug in a cylinder head of the internal combustion engine. A projection on the end of the spark plug housing facing the combustion chamber houses the injection lens. The outer diameter (D1) of the projection is smaller in the area of the injection lens than the outer diameter (D2) of the spark plug housing in the fastening zone.

Abstract: A spark plug includes a center electrode and a ground electrode. The center electrode is arranged relative to the ground electrode in such a way that the spark gap extends between the ground electrode and the center electrode. The spark gap is surrounded by a wall, wherein the wall has a recess or hole, which is designed in such a way that a feeler gauge can be inserted between the center electrode and the ground electrode.

Abstract: An apparatus for coupling laser light into a combustion chamber of a combustion engine includes a combustion chamber window and a structural element, wherein the combustion chamber window is releasably fixable to the structural element, wherein there is provided an optical window which is arranged at the structural element and is at least region-wise covered by the combustion chamber window.

Abstract: The invention relates to a method for starting an internal combustion engine (1), particularly a stationary gas engine, which is driven by at least one starter motor (2). The starting process is interrupted once the starter motor (2) has been started if the angular acceleration (a) of the internal combustion engine (1) remains below a predefinable acceleration value and/or if, within a predefinable first time period (tA), the actual rotational speed (n) remains below a predefinable first rotational speed threshold value (nA) and/or if, within a predefinable second time period, the average rotational speed of the internal combustion engine (1) remains below a predefinable second rotational speed threshold value.

Abstract: An ignition device has a high voltage transformer having a primary side and a secondary side, of which the primary side is connected to a high voltage source and the secondary side is connected to a spark path to provide the ignition spark. The time variation in the primary current flowing on the primary side is measured and subdivided at least into a spark burning phase and a subsequent free-running phase of the high voltage transformer. The transition from the spark burning phase into the free-running phase is equated to the moment of extinction of the ignition spark. The time variation of the primary current in the spark burning phase is mapped by a first function and in the free-running phase by a second function, and the intersection point of the two functions is equated to the moment of extinction of the ignition spark.

Abstract: An ignition device for an internal combustion engine includes an ignition coil which is feedable on its primary side by a voltage supply unit, a secondary current measuring device for measuring the course of the secondary side current, a control device for at least temporary controlling of the primary side voltage or the primary side current in dependence on the measured course of the secondary side current. Subsequent to an interruption of the primary side voltage or current supply of the ignition coil during an ignition process or subsequent to the drop of the primary side voltage or the primary side current in the ignition coil below a predeterminable threshold during the ignition process, the control device energizes or regulates the primary side voltage or current supply of the ignition coil above the predeterminable threshold only when the secondary side current induced thereby acts in the direction of the predetermined course of the secondary side current.

Abstract: An internal combustion engine is disclosed, comprising at least one first compression device and at least one second compression device which is connected in series relative to the first compression device. At least one bypass pipe bypasses at least one compression device. At least one controllable valve is arranged in the at least one bypass pipe such that the amount of fluid which can be recirculated around the compression device can be controlled.

Abstract: Method for operating an internal combustion engine, in particular a gas spark-ignition engine with prechamber ignition, wherein the prechamber is supplied from the outside with a gas mixture as a scavenging gas whose CO2 content is subjected to open-loop or closed-loop control, and wherein hydrogen is additionally added to the scavenging gas.

Abstract: The invention relates to an arrangement including an internal combustion engine ignition device having a spark plug and a spark plug seat (in which the spark plug can be fastened in a fastening zone), and a cylinder head in which the spark plug is or can be mounted via the spark plug seat. The cylinder head has a cylinder head cooling cavity. The spark plug seat includes a temperature control medium chamber which is separate from the cylinder head cooling cavity and has a cooling medium feed line and a cooling medium discharge line. The temperature control medium chamber and the cylinder head cooling cavity are connected to separate medium temperature control devices and form separate medium systems.

Abstract: A method is provided for operating a stationary internal combustion machine including a compressor device of variable compressor geometry which compresses gas fed to the internal combustion machine, and a throttle device which is connected downstream of the compressor device and with which the amount of compressed gas fed to the internal combustion machine is variable. The internal combustion machine is regulated by way of the actuation of at least two adjusting members, wherein the internal combustion machine is regulated to a—preferably substantially constant—engine regulating value. Upon a deviation in the engine regulating value from a reference value, the amount of gas fed to the internal combustion machine is altered by the actuation of the throttle device as the first adjusting member and by the variation in the geometry of the compressor device as the second adjusting member so that the engine regulating value is re-set to the reference value.

Abstract: The invention relates to a device for igniting a fuel/air mixture in the combustion chamber of an internal combustion engine. The device includes an electrode which is connected to a voltage source and extends into a precombustion chamber, and the precombustion chamber is separated at least in some regions from the combustion chamber by a wall. A control device or a regulating device is provided which controls the voltage supply to the electrode such that a corona discharge is carried out in the precombustion chamber. The wall has at least one opening for exchanging fluids between the combustion chamber and precombustion chamber, and a fluid inlet opens into the precombustion chamber.

Abstract: A laser ignition apparatus including at least two laser light generating devices and a common optical coupling-in means for coupling laser light from the at least two laser light generating devices into a combustion chamber of a combustion machine, wherein the at least two laser light generating devices are so arranged that laser light given off by the laser light generating devices in the operating condition impinges on the optical coupling-in means and/or issues from the optical coupling-in means in parallel displaced relationship or at an angle to each other. A method of igniting a fuel/air mixture in a combustion chamber of a combustion machine.

Abstract: The invention relates to a method for operating an internal combustion engine, wherein air is inducted and then compressed. Before introduction into a combustion chamber of the internal combustion engine, the air humidity of the inducted air is determined and temperature of the compressed air introduced into the combustion chamber is altered depending on the air humidity of the inducted air.

Abstract: An apparatus is provided for the ignition of a fuel/air mixture in the combustion chamber of a combustion machine, wherein the combustion chamber has at least one inlet valve and at least one outlet valve. There are further provided a laser light generating device for giving off laser light and a combustion chamber window for coupling the laser light into a combustion chamber of the combustion machine. There is provided at least one fluid feed means which is separate from the inlet valve or valves and with which a fluid can be caused to flow at least on to regions of the surface of the combustion chamber window or between the combustion chamber window and the focal point of the laser light.

Abstract: An Ignition device for an internal combustion engine including a control device and an ignition coil which is feedable on its primary side by a voltage supply unit. The control device is provided to interrupt or reduce the voltage impressed on the primary side of the ignition coil when a magnitude of a magnetic induction B on the primary side of the ignition coil is greater than a predeterminable maximum value.

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 method of jointly fitting or removing a piston and a cylinder liner in or from an engine block of an internal combustion engine is provided. During the fitting or removal operation, the cylinder liner is supported or held on a contact shoulder which is arranged at a connecting rod of the piston or at the piston.