Air compression internal combustion engine

An air compression internal combustion engine having at least one cylinder arranged in an engine block with a combustion chamber formed in the cylinder and being delimited at its longitudinal ends by a piston and a cylinder head (1) which has a bottom area covering the cylinder, the cylinder head including for each cylinder four gas exchange valves (intake valves 8, 9 and exhaust valves 11, 12) which are installed in the cylinder head (1) so as to be inclined at a valve angle α and β, respectively, each in the range of 2° to 9° relative to a cylinder head longitudinal central plane (10), the gas exchange valves each having valve heads (8a, 9a, 11a, 12a) with diameters Dintake and Dexhaust which have a diameter of 30% to 40% of the cylinder diameter Dcylinder, and the valve heads (8a, 9a, 11a, 12a) which are seated at the bottom of the cylinder head (1) also being disposed at a distance (30, 31) from the cylinder wall which delimits the combustion chamber, a web (28, 29) of a predefined width additionally being provided between adjacent gas exchange valves of a cylinder, and sections of the valve heads (8a, 9a, 11a, 12a) of all the gas exchange valves having projection (26, 27) protruding into the combustion chamber.