Abstract: A spark-ignited gas engine includes a combustion chamber, a compressor, an exhaust gas duct, and a thermal reformer. The compressor is driven electrically by a motor and configured to load the combustion chamber with an air-gas-mixture. The thermal reformer is connected to at least a part of the exhaust gas duct to receive heat from the exhaust gas duct. The thermal reformer is configured to convert higher HCs to hydrogen (H2). The higher HCs includes n carbon atoms and m hydrogen atoms according to at least one of the following reactions: —CnHm+nH2O<<->>(m/2+n)H2+nCO, —CnHm+(n/2)O2<<->>(m/2)H2+nCO, and —CnHm+nCO2<<->>(m/2)H2+2nCO.

Abstract: An assembly includes a combustion engine and a housing to protect an engine, wherein the housing has a first wall and the first wall has a container.

Abstract: A cylinder head of a static spark-ignited gas engine may include at least two exhaust ports, at least two inlet ports, at least one cylinder axis, and a bottom side. Each inlet port runs to the bottom side of the cylinder head and may have a valve seat for inlet valve. Each valve seat may have a corresponding center axis. At least one inlet port has a countersink in the border area of the bottom side. The countersink may have an offset axis shifted from the corresponding center axis. The countersink may also have a maximum radius with reference to the corresponding center axis. The maximum radius and a straight line may form an angle ?. The straight line may connect the cylinder axis with the corresponding center axis. The angle ? may fulfill the following condition: 70°<=?<=110°.

Abstract: A piston may include a piston body having a piston skirt. The piston may further include at least one piston ring groove arranged in the piston skirt. A lowermost piston ring groove may be arranged in a first plane and at least one blind hole may extend at least partially from the lowermost piston ring groove into the piston body. Each blind hole may act as an oil reservoir contributing to lubrication between the piston skirt and a cylinder liner during movement of the piston.

Abstract: A spark plug may include a shell surrounding a lower part of an insulator. The shell may be provided with a tool engaging portion, a seal face configured to contact a corresponding seal of a cylinder head of an internal combustion engine, a cylinder engaging threaded portion having a thread diameter (D) configured to screw the spark plug in a threaded bore of the cylinder head, and an intermediate portion extending between the shoulder and the cylinder engaging threaded portion. The intermediate portion may have a length (L1), wherein: 0.20<=L1/D<=0.80 and L1 is the length and D is the thread diameter.

Abstract: A piston for an internal combustion engine is disclosed. The piston may have a piston skirt with a centre axis. The piston may also have a piston crown disposed adjacent a top of the piston skirt. The piston crown may have a diameter D. The piston crown may have a piston crown margin of width b extending in a circumferential direction. The piston crown may also have a piston trough with a depth t. The piston trough may have a piston trough wall with a base diameter. The piston trough may also have at least one recess with a height h. The height h parallel to the direction of the centre axis may satisfy the following requirement: 0.2 t<=h<=t.

Abstract: An engine block of an internal combustion engine is disclosed. The engine block may have a piston and at least one gas exchange valve. The piston may have a piston skirt having a first center axis. The piston may also have a piston head delimiting the piston skirt at the top with a diameter D. The piston head may have a piston head edge and a piston head recess with a piston recess wall having a height H. At least one valve pocket may be formed into the piston head edge. The at least one valve pocket may have a valve pocket depth T with respect to the piston head edge. The valve pocket depth T may fulfil the following condition with respect to the wall height H: 0.05 H<=T<=0.5H.

Abstract: A piston of an internal combustion engine is disclosed. The piston may have a piston skirt having a central axis. The piston may also have a piston crown delimiting the piston skirt with a diameter D adjacent a top of the piston skirt. The piston crown may have an edge of the piston crown of width b and a piston crown recess of depth t. The piston crown recess may have a piston recess wall with an opening cross section of diameter d. At least one groove with an internal diameter dn may be provided within the edge of the piston crown. The at least one groove may run in a circumferential direction relative to the central axis. The internal diameter dn may be larger than the diameter d.

Abstract: A piston of an internal combustion engine is disclosed. The piston may have a piston sleeve with a centre axis and a piston base with a diameter D delimiting the piston sleeve at a top of the piston sleeve. The piston base may have a piston base rim of width b and a piston bowl with a depth t. The piston bowl may be designed as a pot bowl, which may have a piston bowl base and a piston bowl wall with a maximum diameter d4 adjoining the piston bowl base. The piston bowl may have an opening cross-section aligned symmetrically relative to the centre axis. The opening cross-section may have a minimum diameter da, which is smaller than the diameter d4. A flow cut-off edge designed as a nose may be formed in the opening cross-section and may project in the radial direction inwards over the piston bowl wall.

Abstract: The present disclosure refers to a blow-by gas removing device for an internal combustion engine having a crankcase. The blow-by removing device may comprise an engine component rotatably driven about a longitudinal axis. A fan wheel may be fixed to the engine component such that the fan wheel rotates together with the engine component. A housing may cover at least partially the fan wheel. The housing may be provided with an outlet configured to be connected to an oil separating device. The fan wheel and the housing may be configured in a manner that blow-by gas saturated with oil is being sucked off from the crankcase and discharged through the outlet. Further, the present disclosure refers to a method for removing blow-by gas of an internal combustion engine without an auxiliary drive for a fan.

Abstract: A protective device for a spark-ignition gas engine is provided, which engine has a throttle valve for controlling a gas/air mixture and has an exhaust-gas turbocharger with a turbine that is associated with a throttle member for exhaust gas. A detection unit is configured to detect an actual differential pressure across the throttle valve, and a control unit is configured to change the position of the throttle member based on the actual differential pressure. The throttle member for the exhaust gas is provided only downstream of the turbine in relation to the flow direction of the exhaust gas. A method for regulating an exhaust-gas throttle member, connected downstream of a turbine of an exhaust-gas turbocharger, is also disclosed.