Teaching Practice of Technological Integrated Innovation for Professional Degree Postgraduates of Mechanical Engineering: An Engine Case Study

There exist two types of models cultivating graduate students, so-called academic and professional degrees. Compared with the academic degree, the aim of the professional degree is to cultivate high-level application-oriented special talents with solid theoretical foundations applicable for the practical work needs of specific industries or occupations. To improve the technological integrated innovation ability of professional degree postgraduates in mechanical engineering and to cultivate professional talents suitable for the needs of enterprise and social development, during class teaching, taking the developed heat transfer, lubrication and friction coupling model of piston ring-liner as an example, based on the relationship between the coupled model and technological integrated innovation, after verifying the correctness of the coupled model using comparisons between the simulated temperature fields of solid components with the tested ones, the impacts of ring pressure constants and lubricant viscosities on the heat transfer, lubrication and friction characteristics of piston ring-liner are studied in detail. The results show that the increase of ring pressure constants efficiently enhances the cooling of combustion chamber components, but reduces the lubrication properties of piston ring-liner; in contrast, increasing the viscosities of lubricant improves the lubrication properties of piston ring-liner, but decreases significantly the transferred heat between the piston ring and liner. The method of technological integrated innovation in this paper can efficiently improve the innovation consciousness of professional degree postgraduates.