Abstract: The invention relates to a spark plug for an internal combustion engine, in particular a gas engine. The spark plug includes a middle electrode and at least one earth electrode group, each comprising one or more earth electrode platelets. The middle electrode includes at least one middle electrode platelet having a middle electrode surface, and the middle electrode surface is inclined in a range from 0° to 50°, preferably to at most 45°, to a cross-sectional plane transverse to the longitudinal axis of the spark plug. Each earth electrode platelet of an earth electrode group has an earth electrode surface facing towards the middle electrode surface, spaced apart from the earth electrode surface and running substantially parallel to the earth electrode surface.

Abstract: The invention relates to a method for checking whether an electromagnetically actuated gas injector (1) arranged in an internal combustion engine between a fuel source and a combustion chamber is in the closed end position thereof. According to said method, an electric test voltage is applied to the gas injector (1) and the discharge current (I) generated by the electric test voltage is measured.

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 controlled by a plurality of partially reliability-relevant functional units. Every reliability-relevant functional unit comprises at least one functional module and at least one monitoring module. The monitoring module is separate from the functional module associated therewith and monitors the functioning of the functional module. The control device also comprises a higher order monitoring functional group. The monitoring module has an entry point for communication with the higher order monitoring functional group. When an error is detected, the monitoring module signals the error to the higher order monitoring functional group using the entry point.

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: The invention relates to a spark plug, comprising a center electrode and a ground electrode, wherein 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, wherein the spark gap is surrounded by a wall, wherein the wall has a recess or opening, which is designed in such a way that a feeler gauge can be inserted between the center electrode and the ground electrode.

Abstract: The invention relates to a laser spark plug, comprising a laser light-producing device (2) and a spark plug housing (1) at the end of which facing the combustion chamber an injection lens (10) for injecting laser light into the combustion chamber (30) of an internal combustion engine is arranged, the spark plug housing (1) comprising a fastening zone (7) for fastening the laser spark plug in a cylinder head (17) of the internal combustion engine. A projection (31) on the end of the spark plug housing (1) facing the combustion chamber houses the injection lens (10), the outer diameter (D1) of the projection (31) being smaller in the area of the injection lens (10) than the outer diameter (D2) of the spark plug housing (1) in the fastening zone (7).

Abstract: The invention relates to an arrangement comprising 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 having a cylinder head cooling cavity. The spark plug seat comprises a temperature control medium chamber which is separate from the cylinder head cooling cavity and has a medium feed line and a medium discharge line, the temperature control medium chamber and the cylinder head cooling cavity being connected to separate medium temperature control devices and forming separate medium systems.

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 spark plug is described, for an internal combustion engine, having a prechamber for accommodating an ignitable medium, and having a laser device for applying laser radiation to an ignition point situated in the prechamber. The laser device has a laser-active solid body having a passive Q-switch.

Abstract: A laser spark plug, in particular for an internal combustion engine, having an arrangement or structure for coupling, especially focusing, laser radiation in or on an ignition point, including an arrangement or structure for influencing a fluid flow disposed in an end region of the laser spark plug on the side of the combustion chamber, which constitute an essentially sleeve-shaped extension of the laser spark plug in the direction of the combustion chamber, in which the arrangement or structure for influencing the fluid flow is configured to influence the fluid flow in the region of the ignition point.

Abstract: The invention relates to a device for igniting a fuel/air mixture in the combustion chamber of an internal combustion engine, comprising an electrode which is connected to a voltage source and extends into a precombustion chamber, wherein the precombustion chamber is separated at least in some regions from the combustion chamber by a wall, wherein 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, wherein the wall has at least one opening for exchanging fluids between the combustion chamber and precombustion chamber, wherein a fluid inlet opens into the precombustion chamber.

Abstract: An ignition arrangement for a combustion machine, which provides a corona discharge for ignition of a fuel/air mixture in the combustion chamber (24) of the combustion machine, wherein the ignition arrangement delivers a basic voltage UL which is always different from zero for triggering and maintaining the corona discharge for each ignition process.

Abstract: A catch device, as part of a fall protection for ladders and similar climbing devices, for application in a guide rail with a C-profile, includes a body and at least two pairs of rollers, arranged in the body so as to run inside the guide rail. At least one pair of rollers is rigidly fixed to the body and one roller pair is arranged to pivot about an axis at right angles to the longitudinal axis of the guide rail and which runs up to the rotational axis of the roller pair. The pivoting roller pair can be fixed in a secure position such that the pivoting roller pair is fixed on a shaft, mounted so as to rotate in the body, the upper end of the shaft projecting from the body and having an indent. A hanging latch is connected to the body which may engage in the indent. The hanging latch can be locked in the engaged position.

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: 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: The invention relates to a monitoring method for a control device system with several electronic control devices for driving an internal combustion engine in a motor vehicle, whereby operating variables of the individual control devices are compared with each other, in order to detect a malfunction of the control devices. It is proposed that the control devices are monitored across-the-system, by comparing the operating variables of different control devices of the control device system with one other.

Abstract: An internal combustion engine is controlled by a plurality of partially reliability-relevant functional units. Every reliability-relevant functional unit comprises at least one functional module and at least one monitoring module. The monitoring module is separate from the functional module associated therewith and monitors the functioning of the functional module. The control device also comprises a higher order monitoring functional group. The monitoring module has an entry point for communication with the higher order monitoring functional group. When an error is detected, the monitoring module signals the error to the higher order monitoring functional group using the entry point.

Abstract: Ignition device for an internal combustion engine comprising an ignition coil which is feedable on its primary side by a voltage supply unit and a secondary current measuring device for measuring the course of the secondary side current and 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, wherein, 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, said control device energises 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 Ignition device for an internal combustion engine comprising a control device and an ignition coil which is feedable on its primary side by a voltage supply unit, wherein said 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.