CHOOSING A TURBOCOMPRESSOR MODEL FOR CONVERTING FREE INLET DIESELS TO TURBOCHARGED DIESELS

The use of supercharged diesel engines improves the combustion process, increases the efficiency of the engine and the overall efficiency of its operation. As a concomitant beneficial effect, there is an increase in the environmental performance of the engine. All of the above factors are particularly relevant for solving the problem of converting so-called "atmospheric" diesel engines into turbocharged engines, and the objects of conversion can be a fleet of old engine models that have not exhausted their resource. The results of the research of this article can be used for the implementation of the association agreement between Ukraine, on the one hand, and the European Union, the European Atomic Energy Community and their member states, on the other hand, in particular, Chapter 6 and Chapter 17 of Chapter V. The purpose of the article is creation of a methodology for determining turbocharger parameters, based on engine intake process parameters and selection, based on these parameters, of a turbocharger model for conversion of "atmospheric" turbocharged diesels. The research methods are based on the thermal calculation of the Hrynevetsky-Mazing engine, the calculation of the regulatory characteristic of the engine according to the cubic trinomial equation, the determination of the characteristic modes of the engine according to the regulatory characteristic, the calculation of the air consumption by the engine depending on the speed of rotation of the crankshaft in different modes of operation of the engine and the superimposition of the obtained results of the air consumption on the "turbo card" of the turbocharger, which allows you to establish the correspondence of the turbocharger model to the engine brand. Calculations were carried out using the mathematical editor Mathcad and Microsoft Excel spreadsheets. The results of the obtained calculations and the methodology can be the basis for the development of recommendations for the choice of a turbocharger when converting "atmospheric" diesel engines with turbocharging. Such recommendations will be useful to agricultural producers, in which the tractor fleet has old brands of tractors with non-supercharged engines that have not exhausted their resource.