In 1907 professor grinhvesky proposed a method to calculate the temperature cycle of the essential work of the process and was then completed by Professor mading. On the basis of the main content of this method, equations for the periodic time-varying ideal medium with ideal gases are established, taking into account the changing chemical processes in the combustion.The measurement of pressure and temperature parameters in the compression and expansion process of the first and last course of different values in the middle of the thermodynamic variables determined by the value of the multi equation, in the combustion process is determined by the method of graph approach.The results obtained are shown in the form of figure P - traditional methods are still in use today on the basis of studying the nature of the training program, since it is easy to explain the motivation of the cycle theory research at the beginning of the process. However, the research of deep process of work motivation, in fact grinhevesky - process approaching mading method is not perfect his theory, when a design is simple, is not allowed to reflect the nature of the physical process.
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