valves not represented in more detail of the cylinder block 1 the turbine wheel 9 of the turbocharger is arranged in the exhaust line 18 the mixture formation could of course also take place inside the cylinder head in the suction line or in the cylinder space directly during the induction stroke also to be seen are a laser light source designated 10 and an optical transmission apparatus consisting of flexible optical conductors 11 which guide the laser light to the coupling optics 24 of the individual cylinders the laser light source 10 is regulated by an electronic engine regulating device 13 which receives the current operational values of the engine from the schematically represented measurement apparatus for speed 15 engine power 16 and cylinder pressure 17 the current crank angle value is designated u03b1 the engine power n the speed n and the current cylinder pressure values p 1 to p 6 the crank shaft angle signal u03b1 serves above all to fix the times of the laser ignition pulses to the individual cylinders 27 it would naturally also be possible for each individual cylinder 27 to be provided with its own laser in the laser light source 10 fig2 shows an embodiment of a cylinder 27 of an internal combustion engine according to the invention in a schematic longitudinal section the piston 19 which has a piston trough 19 a is represented in the top dead centre point the inlet valve 20 and the outlet valve 21 are only schematically represented it is provided in this embodiment to focus the laser light 23 coming from the laser light source 10 through a lens 24 via a combustion chamber window 22 on an individual fire point 26 in the combustion chamber 25 this representation.