Abstract: The present invention refers to the transformation of piston alternative movement into an axle revolving movement. It increases the length of the lever and that applies the explosion strength to the axle without increasing the piston drive and therefore, the engine revolutions decrease considerably which implies a lower consumption. This technique then uses the piston—rod—bearing—sloped surface, eliminating the piston lateral efforts, obtaining a lower wear and tear and a better rings sealing with lower internal lubrication in the cylinder.