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Article is devoted to mathematical modeling of heat transfer to the cooling system of locomotive diesel engine . The article presents the features of calculation of heat to the cooling system of a diesel engine when idling.

On the basis of experimental data thereis a mathematical model in thisarticle. Its made from the registration options in acfual operation mode of the locomotive. This mathematical model describes the technical condition of the locomotive and evaluates the parameters and characteristics. Considerable attention is paid to complex state operation of the facility. In dealing with the mathhematical model it’s defined the main locomotive operation indicator.

The article deals with the cooling and heating of individual components and assemblies diesel engines at low ambient temperatures. The more attention is paid to the description of the characteristics of the intensity of the cooling water system of diesel locomotive engines. The article presents the results of investigation of the outdoor temperature , operating conditions of load and no-load on the cooling system of. The parameters of the cooling water and engine oil that characterize the thermal conditions of the diesel engine. We reviewed and analyzed various ways of warming systems, diesel engines using airborne and stationary devices. The work is aimed at improving the efficiency of diesel locomotive at warming by reducing the operating time of the diesel engine is idling.

The reliable operation of a locomotive's diesel engine depends on the efficiency and quality of the cooling system, therefore, it is important to maintain optimal performance throughout the entire period of operation. The cooling system is developed individually for each type of diesel engine, therefore, when designing new diesel generator sets for locomotives, it is necessary to improve cooling systems, which is one of the most important tasks of ensuring reliable and efficient operation, while it is important to use test complexes to simulate real-world work processes, to obtain estimated capabilities and optimize thermal conditions. This scientific paper presents the results of the development and operation of a stand for simulating the operation of a cooling system, with the possibility of simulating various operating modes. The research is based on the method of physical modeling of thermal processes using controlled heat load sources and a system of control and measuring devices. The experimental installation is equipped with a cooling circuit system with adjustable operating parameters. The developed stand makes it possible to carry out resource tests of cooling system elements, optimize algorithms for controlling thermal conditions and determining the amount of heat generated and discharged from the system, as well as with the ability to work out troubleshooting methods without using standard diesel equipment. The practical significance of the stand is the possibility of creating methods for a comprehensive assessment of the dynamic characteristics of the cooling system with the possibility of modeling emergency situations and investigating transient processes of heat flow redistribution simulating real processes. During the operation of the stand, it is possible to install a comprehensive assessment of the performance of the cooling system, taking into account heat dissipation, the amount of heat removed, and heating-cooling intensity indicators when simulating work with different amounts of water circuits. The application of the research results may be useful in the development of new and modernization of existing diesel cooling systems, as well as in the study of heat dissipation during operation of locomotives in winter, when it is important to preserve heat in the system.

This article is about technical and economic indicators of the operation of freight locomotives at the ranges of Russian Railways. The most attention is paid to such indicators as train mass, fuel consumption, technical and district speed. There is an analysis of technical and economic indicators during the period from 2010 till 2019. Based on the analysis of technical and economic indicators in the real mode of operation of freight diesel locomotives it's presented calculation of dimensionless train mass coefficients, fuel efficient use, district and technical speeds. The presented calculation fully characterizes as well using degree of technical and economic characteristics of diesel locomotives in of power and time as the effectiveness of system organization in their operation. To know the operating modes of diesel-generator sets of diesel locomotives in train work is source material for the analysis of technical characteristics of locomotive power equipment and making recommendations on their optimization in relation to operating conditions