Abstract: An arrangement for protecting ignition means in an internal combustion engine includes a cylinder head and two longitudinal parallel valve cover banks mounted thereon. Between the valve cover banks there is a longitudinal space for ignition means to the respective combustion chambers of the engine. Such a space and ignition means with their connections located therein are usually subjected to dirt, which reduces the functional reliability of the engine. To eliminate this and to facilitate engine service, the space is formed as a trough with a bottom and two end walls in the cylinder head, the trough being covered by a lid joining on to the valve cover banks and to at least one of its end walls and having at least one opening for ventilation and drainage.

Abstract: Internal combustion engine with at least one combustion chamber produced within a cylinder head or similar device, it being possible to feed a fuel-and-air mixture into said combustion chamber through two inlet valves arranged in the cylinder head and to discharge from the said combustion chamber exhaust gases through two exhaust valves arranged in the cylinder head, with the invention also relating to a method of producing such a combustion chamber by means of a casting process. The invention is characterized in that the combustion chamber (1) consists of four cavities (4,5,6,7) distributed in quadrants with a circular plane forming part of base plane (8) of cylinder head (2), in that each individual cavity (4-7) has a shape which is in the main rotationally symmetrical and in that the cavities (4-7) overlap one another, whereby arc-shaped transitions are formed between cavities (4-7) in base plane (8).