Estimation of Strength of the Combustion Chamber of the ICE Piston with a TBC Layer

An improvement of the performance of modern heat engines is ensured through the use of new materials, design and technological solutions, and a higher level of modeling the processes that inherent in IC engines. Theoretical study and a pilot research prove that use of components with heat insulation layers on the surfaces that form the combustion chamber is one of the promising directions of integrated improvement of IC engines. It is achieved by means of increasing the amplitude of the combustion chamber surface temperature high-frequency fluctuations, at the time that the strength of the surface layer exceeds the one of the basic material. Under such conditions, it becomes possible to determine the reserves for further power increase of IC engines. The approach based on the principles of guaranteeing the structural strength is proposed that uses the results of mathematical simulation with the maximum reduction of design routes. It presupposes integration of the 1-D simulation method of the high-frequent temperature field of the surface layer of the structure in characteristic zones, the 3-D simulation of stationary temperature field and thermal stressed state of the structure, as well as the 0-D simulation of total fatigue and creep damage in the critical piston zone for a given cyclic change of engine load. The comparative analysis of the results for the piston of the tractor diesel engine is presented.