Different thermal spray processes are being used to provide coatings for cylinder bores. The internal plasma coating technology allows the application of protective layers on the cylinder surface of engine blocks made of AlSi cast alloys. This significantly increases the efficiency of the engine. Plasma coating enables a significant reduction in the coefficient of friction, a reduction in oil consumption, and a significant increase in wear resistance, compared to cast iron, the standard material for cylinder liners. In the future, internal plasma coating will play an important role in the production of new generation engines, which are characterized by low fuel consumption. Paper includes a German-language abstract.