This work presents a fuel supply electronic control system (model ESUVT.01) developed by Dizelavtomatika (Saratov) for the D50 (6 CHN 31.8/33) locomotive diesel engine manufactured by Penzadieselmash. In this system, the fuel supply process is controlled by a high-speed electro-hydraulic valve installed in the high-pressure line of the fuel system. A set of electrically controlled high pressure fuel pumps (mode 4ETN.03) with electro-hydraulic valves for the diesel was manufactured. This system can also control the engine speed. It was noted that the best quality indicators of the speed regulating process are provided by the PID control law. It was shown that for a diesel with high inertia, it is advisable to use the PI control law. Experimental studies were conducted to assess the influence of structure and parameters of this control system on the dynamic qualities of this diesel engine. The object of bench testing was a 1-PDG4D-type diesel-generator from the above-mentioned diesel engine and MPT-84/39 traction generator. The dependences of the duration of the transient process, the overspeed and the period of natural oscillations of the regulated parameter on the PI controller parameters were obtained. The necessity of optimizing the coefficients of proportional (P) and integral (I) components of the PI control law was confirmed. A method for optimizing the coefficients of proportional and integral components of the PI control law was proposed. The optimized coefficients for the transient acceleration process of the diesel engine according to the locomotive characteristic were obtained.

This study addresses the problem of selecting the optimal structure and parameters of an electronic rotational speed controller for the crankshaft of a locomotive engine. An electronic control system of fuel supply ESUVT.01 developed by OOO PPP Dizelavtomatika (Saratov) for the locomotive diesel engine D50 manufactured by OAO Penzadizelmash is presented in the paper. Experimental studies were conducted to evaluate the impact of the structure and parameters of the system on dynamic properties of the engine. Bench tests were conducted on a diesel generator unit 1-PDG4D consisting of a diesel engine D50 and a traction generator MPT-84/39. As the result of the testing, equations describing dependencies of the transient process duration, overspeeding during the transient process and the free period on the parameters of the proportional-and-integral controller were obtained. The study confirmed the need to optimise the values of the coefficients of the proportional and integral components of the proportional-and-integral governing law and adjust them in accordance with the operational mode of the diesel engine. An appropriate optimisation method was proposed. Optimised values of these coefficients for the transient process of the studied diesel engine acceleration with regard to the locomotive characteristic were obtained.

Рассмотрена актуальная проблема улучшения качества процесса регулирования частоты вращения коленчатого вала дизельных двигателей. Описаны принципы регулирования этого параметра, реализуемые в двигателях внутреннего сгорания. Показаны преимущества пропорционально-интегрально-дифференциального принципа регулирования. Проведены расчетные исследования влияния структуры пропорционально-интегрально-дифференциального регулятора на динамические показатели системы автоматического регулирования частоты вращения дизеля. Исследованы переходные процессы разгона-торможения и наброса-сброса нагрузки двигателя КамАЗ-740 дизель-генераторной установки мощностью 100 кВт. Получены переходные процессы такой системы регулирования при различных значениях коэффициентов пропорциональной, интегральной и дифференциальной составляющих пропорционально-интегрально-дифференциального закона регулирования. Выполнена оценка влияния этих коэффициентов на показатели качества процесса регулированияпродолжительность переходного процесса и перерегулирование.Ключевые слова: двигатель внутреннего сгорания, дизельный двигатель, система автоматического регулирования, частота вращения вала, ПИД-регулятор In this work, the problem of improving the quality of controlling the diesel engine crankshaft speed is considered. The principles that govern the control of this parameter in internal combustion engines are described. The advantages of the proportional-integraldifferential (PID) control principle are shown. Calculations of the influence of the PID controller structure on the dynamic characteristics of the diesel engine rotational speed automatic control system are performed. The transient processes of acceleration-inhibition and load-dropping are investigated using a KamAZ-740 engine of a 100 kW diesel generator. Transient processes are achieved for different values of the proportional, integral

A topical problem of improving the fuel supply process in locomotive diesel engines in considered in this article. An ESUVT.01 type electronic control system developed by OOO PPP Dizelavtomatika (Saratov) for a D50 (6 ChN 31.8/33) locomotive diesel engine manufactured by Penzadizelmash is presented. It is shown that fuel efficiency and exhaust gas toxicity indicators can be significantly improved by optimizing the initial fuel supply phase, that is the injection advance angle. Experimental studies are conducted to assess the influence of this angle on the locomotive engine characteristics. Bench tests were carried out on a 1-PDG4D diesel generator consisting of the above-mentioned diesel engine and a traction generator MPT-84/39. As the result of the tests, dependencies of the diesel characteristics on the injection advance angle are obtained, and the need to optimize the injection advance angle according to the diesel operation mode is confirmed. Optimized values of the injection advance angle in the diesel characteristics modes are obtained. Fuel efficiency and exhaust gas toxicity indicators are determined at the optimized injection advance angle.