Abstract: A contacting device of a voltage transmission device of an ignition device of a large engine, whose cylinders have piston diameters of at least 140 mm having a first spring portion for the electrical contacting of a cable contacting piece of the voltage transmission device and a second spring portion for the electrical contacting of a spark plug connection of a spark-plug of the ignition device. The second spring portion tapers in a direction of its end, which comes to lie against the spark-plug connector of the spark-plug. The spark-plug connector of the spark-plug interacting with the contacting device includes a trough into which the contacting device can be introduced with a spring portion.

Abstract: A gas supply system, having a gas regulating station for supplying an engine with gaseous fuel and a double-walled gas line extending from the gas regulating station to the engine, which comprises an inner and an outer pipe, in a gas fuel operating mode the inner pipe is flowed through by the gaseous fuel towards an engine-side end of the double-walled gas line, an inert gas purging line, and a first shut-off valve assigned to the inert gas purging line. In a purging mode inert gas can be fed to the outer pipe at the gas regulating station-side, which inert gas flows through the outer pipe in the direction of the engine-side end of the double-walled gas line, where it passes into the inner pipe and flows via the inner pipe towards the gas regulating station-side end of the double-walled gas line.

Abstract: An internal combustion engine having at least one cylinder bank comprising multiple cylinders, each cylinder comprises a rocker arm box for accommodating rocker arms of a valve train, and each cylinder comprises a rocker arm cover pivotable relative to the rocker arm box. The rocker arm cover carries an ignition coil contactable with a spark plug via an extension extending through a protective tube between the cylinder head and the rocker arm box or the rocker arm cover. The rocker arm cover comprises a first portion with a first introduction aid, into which the protective tube is threaded during closure of the rocker arm cover and a second portion with a second introduction aid, into which the spark plug extension is threaded during closure of the rocker arm cover to automatically and self-centringly form an electrical contact between the spark plug extension and the ignition coil.

Abstract: A contacting device of a voltage transmission device of an ignition device of a large engine, whose cylinders have piston diameters of at least 140 mm having a first spring portion for the electrical contacting of a cable contacting piece of the voltage transmission device and a second spring portion for the electrical contacting of a spark plug connection of a spark-plug of the ignition device. The second spring portion tapers in a direction of its end, which comes to lie against the spark-plug connector of the spark-plug. The spark-plug connector of the spark-plug interacting with the contacting device includes a trough into which the contacting device can be introduced with a spring portion.

Abstract: An internal combustion engine having at least one cylinder bank comprising multiple cylinders, each cylinder comprises a rocker arm box for accommodating rocker arms of a valve train, and each cylinder comprises a rocker arm cover pivotable relative to the rocker arm box. The rocker arm cover carries an ignition coil contactable with a spark plug via an extension extending through a protective tube between the cylinder head and the rocker arm box or the rocker arm cover. The rocker arm cover comprises a first portion with a first introduction aid, into which the protective tube is threaded during closure of the rocker arm cover and a second portion with a second introduction aid, into which the spark plug extension is threaded during closure of the rocker arm cover to automatically and self-centringly form an electrical contact between the spark plug extension and the ignition coil.

Abstract: A capacitive ignition system for an internal combustion engine includes a voltage converter which has two primary terminals and two secondary terminals a primary voltage source has two voltage source terminals (A+, A?) which are connected in each instance to one of the primary terminals so that a primary circuit is formed; a switch which is incorporated within the primary circuit and a controller so that the switch can be closed and opened; a first control device constructed to actuate the controller in accordance with an ignition pattern for closing and/or opening; an electrical capacitance (C1, C2) within the primary circuit; and a second control device (25) constructed to maintain constant a voltage rise at the secondary terminals, which occurs in order to reach the ignition voltage, as the ignition energy requirement of an ignition device connected to the secondary terminals changes.

Abstract: A spark plug with a center electrode having a first body and a second body of a precious metal, which is connected to the first body, an earth electrode arranged in the radial direction roundabout the center electrode, and an annular ignition gap formed between the center electrode and the earth electrode. The second body is formed as an annular element with a central recess. The first body has a main body and a projection, which extends into the recess of the second body. The second body is positively held on the first body via an undercut formed in the region of the projection of the first body between the first body and the second body.

Abstract: A spark plug for an internal combustion engine, having a center electrode, which has a first body and a second body that is a precious metal welded to the first body and a ground electrode arranged roundabout the center electrode so that an annular ignition gap is formed between the electrodes. The second body of the center electrode is formed as an annular element having a central recess. The first body of the center electrode has a projection that extends into the recess of the second body. A first weld seam is formed between a radially outer surface of the projection of the first body and a radially inner surface of the second body delimiting the recess of the second body, and a second weld seam is formed between an axial surface of the main body of the first body and an axial surface of the second body.

Abstract: A spark plug with a center electrode having a first body and a second body of a precious metal, which is connected to the first body, an earth electrode arranged in the radial direction roundabout the center electrode, and an annular ignition gap formed between the center electrode and the earth electrode. The second body is formed as an annular element with a central recess. The first body has a main body and a projection, which extends into the recess of the second body. The second body is positively held on the first body via an undercut formed in the region of the projection of the first body between the first body and the second body.

Abstract: A spark plug for an internal combustion engine, having a center electrode, which has a first body and a second body that is a precious metal welded to the first body and a ground electrode arranged roundabout the center electrode so that an annular ignition gap is formed between the electrodes. The second body of the center electrode is formed as an annular element having a central recess. The first body of the center electrode has a projection that extends into the recess of the second body. A first weld seam is formed between a radially outer surface of the projection of the first body and a radially inner surface of the second body delimiting the recess of the second body, and a second weld seam is formed between an axial surface of the main body of the first body and an axial surface of the second body.

Abstract: Spark plug for an internal combustion engine, having a center electrode and a ground electrode arranged in radial direction around the center electrode, wherein an annular spark gap is formed between the center electrode and the ground electrode for igniting a fuel mixture by means of an electric ignition spark developing between the center electrode and the ground electrode, and wherein the ground electrode is contoured in such a way that particles reaching the region of the ground electrode can be removed from the spark gap under the influence of gravitational force.

Abstract: Spark plug for an internal combustion engine, having a center electrode and a ground electrode. A spark gap is formed between the center electrode and ground electrode for igniting a fuel mixture by an electric ignition spark developing between the center electrode and the ground electrode. The center electrode and the ground electrode are contoured such that a ratio of a surface of the center electrode and the ground electrode, which is available for development of the ignition spark to a wear volume when an ignition spark is generated, is increased in such a way that an enlargement of the spark gap occurring as a result of wear when an ignition spark is generated is minimized.

Abstract: Spark plug for an internal combustion engine, having a center electrode and a ground electrode. A spark gap is formed between the center electrode and ground electrode for igniting a fuel mixture by an electric ignition spark developing between the center electrode and the ground electrode. The center electrode and the ground electrode are contoured such that a ratio of a surface of the center electrode and the ground electrode, which is available for development of the ignition spark to a wear volume when an ignition spark is generated, is increased in such a way that an enlargement of the spark gap occurring as a result of wear when an ignition spark is generated is minimized.

Abstract: Spark plug for an internal combustion engine, having a center electrode and a ground electrode arranged in radial direction around the center electrode, wherein an annular spark gap is formed between the center electrode and the ground electrode for igniting a fuel mixture by means of an electric ignition spark developing between the center electrode and the ground electrode, and wherein the ground electrode is contoured in such a way that particles reaching the region of the ground electrode can be removed from the spark gap under the influence of gravitational force.