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The study of the development conditions of the intake process from spark plug engine, especially from thermal point of view, highlight complex influences. These influences affect in a decisive manner the energy performance of the engine. In this paper, the authors had done a study and an analysis of the aspects for the purpose to develop a physically-mathematically model which ensures the highlighting of the thermal regime influences of the spark plug engine concerning the efficiency of the filling.

physically-mathematically model; cylinder filling coefficient; heating the fresh air-fuel mixture; thermal regime of the engine