is adapted to a respective curvature can be integrated as evident from fig1 a and 1b the engine includes a narrow housing 2 in which the operating cavity 5 with the schematically indicated rotating piston 6 is arranged it is an advantage of rotating piston combustion engines of this type that a plurality of such disc shaped rotating piston internal combustion engines can be arranged adjacent to each other which power a common drive shaft that is not illustrated with different ignition timing in particular for this case it is advantageous to arrange the microwave pulse generator 10 as illustrated in fig2 a b this facilitates the distribution of the injected microwaves to all housings 2 of the engine arranged adjacent to each other through accordingly configured channels as evident from fig2 b the microwave pulse generator 10 is arranged so that it injects the microwaves into the microwave permeable combustion chamber wall 4 in this simplest embodiment the combustion chamber wall 4 forms the microwave conducting channel in which a wall of the channel can be formed by the metal housing wall 3 and the other opposite wall can be formed by a metal layer applied to the combustion chamber wall 4 or introduced into the combustion chamber wall 4 which metal layer includes an opening for microwaves to pass through not illustrated without this layer the entire surface oriented towards.