Abstract: A crankshaft bearing of a crankshaft of an internal combustion engine has a plain bearing formed of bearing shells, wherein a bearing shell (10) adjoins a cylinder crankcase (11) of the internal combustion engine by a bearing shell back (13) and adjoins the crankshaft to be bearing-supported by a bearing shell running surface (12), wherein either the bearing shell running surface (12) or the bearing shell back (13) or a surface (14) of the cylinder crankcase (11) adjoining the bearing shell back (13) has a concave profile.

Abstract: The gas engine for burning a gaseous fuel-air mixture includes a combustion chamber containing the gaseous fuel-air mixture, at least one ignition device projecting into the combustion chamber to ignite the gaseous fuel-air mixture and having a heating device serving as an ignition source, and a mounting unit separating the heating device from the fuel-air mixture to be ignited. The mounting unit includes a heatable section in contact with the fuel-air mixture to be ignited, and the heating device is designed to heat the heatable section in such a way that the heatable section has a temperature required to ignite the fuel-air mixture.

Abstract: The gas engine for burning a gaseous fuel-air mixture includes a combustion chamber containing the gaseous fuel-air mixture, at least one ignition device projecting into the combustion chamber to ignite the gaseous fuel-air mixture and having a heating device serving as an ignition source, and a mounting unit separating the heating device from the fuel-air mixture to be ignited. The mounting unit includes a heatable section in contact with the fuel-air mixture to be ignited, and the heating device is designed to heat the heatable section in such a way that the heatable section has a temperature required to ignite the fuel-air mixture.