The invention is a converter for converting thermal energy into electrical energy. A method for correcting the permeability of a part including a plurality of openings for allowing a gaseous fluid to pass therethrough. 0% by mass of the mixture prior to combusting the mixture in the combustion chamber. The slider block holder at the same time forms the rotor of a rotational speed signal transmitter for determining the rotational speed of the cylinder block. Precise control of precursors into the chamber via the micromachines allows film stochiometry and thickness to be carefully controlled.