Abstract
In this study, the thermal flow of the piston had been focused on, and a predictive method for piston temperature was developed using the Total Engine Simulation System (TESS), which can predict thermal flow of engine, consisting of 0-dimensional diesel combustion model, gas flow model and heat transfer model. The piston mass elements were divided to the thermal capacity element considering the temperature gradient of the piston in operating condition of the engine. As a result, when operating condition changed, the tendency of the piston temperature was able to predict with this method.