The dynamic of piston in internal combustion engine

Methodology of mathematical formulation of the piston motion in cylinder is presented. Methodology take into consideration actuating forces in crank-and-rod mechanism, hydro dynamical force factors in lubricating film and variable stressdeformed state of piston-cylinder pair. Indicator diagram was drawn and variable loads which act on the piston in crank-and-rod mechanism had been determined. Boundary conditions for the calculations of the variable stress-deformed state of piston as a result of action of the thermal and force factors. Stationary thermal and variable force deformation of the piston are determined. Hydrodynamic forces and torques that acting in the pair piston - cylinder were obtained, using methods that are developed for slider bearings. Piston motion trajectory was obtained as a result of methodology implementation. Results have been compared with experimental data.