Selection and Validation of the Mathematical Model for the Solution of the Optimization Problem of Fuel Cost Efficiency Improvement of the Locomotive Diesel Engines

In the article issues of mathematical simulation of the working processes of the locomotive diesel engines are discussed. Mathematical model for the calculation of the fuel combustion process in the diesel engine cylinder is proposed. The mathematical model enables the optimization of the internal combustion engines converted to gas-diesel cycle operation, using the specific fuel consumption and acceptable thermal and dynamic loads on the sleeve assembly. It is demonstrated under which conditions the use of the gas fuel blended with the diesel fuel will be economically advantageous in the locomotive diesel engines. To evaluate the hydro-carbon fuel blend application efficiency in the locomotive power units it was proposed to use a consolidated efficiency criterion as the sum of dimensionless particular efficiency criteria characterizing the variation of the fuel cost efficiency and quantity of the fuel incomplete combustion products.