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The feature of offered algorithm is that it allows, without record and analysis of the display diagram, to estimate a running cycle of a diesel engine parameters which characterize ecological and economic performances. The mathematical model described in report allows to determine connection of coefficient of filling, pressure and temperature of air boost, factor of excess of air with effectiveness ratio of combustion and contents of soot in exhaust gas and to take into account this connection at a choice initial data for control fuel feed or for elaboration of diesel engine dynamic model. The algorithm incorporated, for example, in the microcontroller of an electronic fuel feed controller allows analyzing the sensors data and theoretically determine of smoke amount in the exhaust gases for chosen cycle of fuel feed. The restriction of smoke is possible by criterion dD/dGT, where D - contents of soot in exhaust gas and GT - fuel cycle submission under the program-adaptive schema.

The influence of the operation discrete nature upon the dynamic and static properties of the diesel are considered. The dynamic model of the diesel taking into account four operation cycles was used for investigation. In constructing the diesel dynamic model the method of Gonchar [1] based on the energy and mass balance equations as well as on that of the operating body state was applied. The process of fuel combustion was calculated by Vibe's method [2]. The model of the one-cylinder diesel with the ideal electronic rotation frequency controller was used to demonstrate the influence of the discrete nature of the diesel operation upon the dynamic characteristics of the rotation frequency controllers. The diagram of the point-by-point transformations was constructed on the phase plane.