Purpose. In modern conditions of rolling stock operation, the actual vital task is the increasing the efficiency of its use by reducing the cost of energy, including for the traction. It can be achieved by the way of locomotives power control systems creating, in particular the use of operating cards and on-board software and hardware. Methodo-logy. The article discusses ways of starting and acceleration of the train. Traction calculations with the definition of energy-efficient trajectories provide the search of a rational consumption of energy with time of running trains. When selecting energy saving train trajectories and the development of operating trains of reference cards, it is necessary to consider the variables such as: the profile area, weight of the stock, series of the locomotive and others. When the transmission power from the primary power equipment to the driving wheel pairs the inevitable losses that are described by the efficiency factor occur. For the most part of the locomotive elements the dependences of the efficiency factor are described by the nonlinear equations. Getting the energy-saving function of traction control at starting and acceleration to reduce the specific consumption of energy by improving the algorithm for calculating the trajectories of multiple trains was considered. The method of selection of energy-efficient trajectories at dispersal trains and power control electric and diesel locomotives with electric transmission which bases on the mathematical methods for evenly search and parametric optimization was offered. Findings. For the variables of the train situation and rolling stock was built two-parameter functional dependence of the power control locomotive and analytically determined the effectiveness of the proposed algorithm. Originality. In the work result the authors received the power saving function of traction control, which depends on the mass of the rolling stock and slant. In contrast to existing development of rational management of trains, this function requires much less computer time with a high accuracy of the calculations, which makes it possible to incorporate it into the onboard control system of the locomotive and energy savings. Practical value. Experimentally established algorithm, which is part of the on-board software package definition of energy-saving modes of conducting trains, will contribute to the reduction of energy expenses.

Today the issue, connected with diesel traction remains relevant for the majority of industrial enterprises and Ukrainian railways and diesel engine continues to be the subject of extensive research and improvements. Despite the intensive process of electrification, which accompanies Railway Transport of Ukraine the last few years, diesel traction continues to play an important role both in the main and in the industrial railway traction rolling stock. Anyway, all kinds of maneuvering and chores are for locomotives, they are improved and upgraded relentlessly and hourly. This paper is focused on finding the opportunities to improve technical and energy parameters of diesels due to the development of modern control method of the fuel equipment in the diesel engine. Methodology. The proposed method increases the power of locomotives diesel engines in the range of crankshaft rotation (from idle running to maximum one). It was based on approach of mixture ignition timing up to the top «dead» center of piston position. Findings. The paper provides a brief historical background of research in the area of operating cycle in the internal combustion engine (ICE). The factors affecting the process of mixing and its quality were analyzed. The requirements for fuel feed system in to the cylinder and the «weak points» of the process were presented. A variant of the modification the fuel pump drive, which allows approaching to the regulation of fuel feed system from the other hand and to improve it was proposed. Represents a variant of embodiment of the complex system with specification of mechanical features and control circuits. The algorithm of the system operation was presented and its impact on the performance of diesel was made. Originality. The angle regulating system of fuel supply allows automating the process of fuel injection advance angle into the cylinder. Practical value. At implementation the angle regulating system of fuel supply components of the diesel engine remain unchanged It allows installing the system on diesel engines of the existing fleet of locomotives and railroad industries. The system, considered in the modeling process, has demonstrated its desirability and feasibility of practical application for diesel engines.

Purpose. The article describes the most common methods for determining the locomotive traction force. Solving the tasks of traction calculations involves determination of the forces influencing the train at every point of the way. When choosing a rational trajectory of the train motion and the development of operational regulations of train driving it is necessary to determine the actual value of the locomotive traction force. Considering various factors, power value of traction electric motor of locomotive may have significant differences. Advancement of the operational definition system of the locomotive traction force during the calculations by electrical parameters of traction electric motor with regard to uneven load of wheel-motor block is the purpose of the article. Methodology. The method of determining the traction force of locomotives and diesel locomotives with electric transmission, which is based on primary data acquisition of traction electric engines of direct current behavior, was proposed. Sensors and their integration into the electrical circuitry of the locomotive in order to get the data in digital form and for operational calculation of the each traction motor mode and the definition of locomotive traction force are presented. Findings. The experimental investigation of the system of locomotive traction force determination with the electric traction motor ED-105 was offered. A comparison of electrical and mechanical power of the electric motor was conducted. Originality. The system of locomotives power operational definition, which takes into account the variable electro-mechanical factors of wheel and motor blocks and increases the accuracy of the calculations, was proposed. Practical value. The system is a part of an onboard complex in definition of energy-efficient regimes for trains movement and provides the definition of accelerating and decelerating forces.