Control of the electromechanical system of internal combustion engine’ lubrication
Students Name: Hudzii Ivan Nestorovych
Qualification Level: magister
Speciality: Electromechanical Automation Systems and Electric Drive
Institute: Institute of Power Engineering and Control Systems
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Hudsii I.N., Golovach I.R. (supervisor) Control of the electromechanical system of internal combustion engine lubrication. Master’s thesis. - Lviv Polytechnic National University, Lviv, 2020. Extended abstract. The first section of the explanatory note examines the structure of the lubrication system. Mostly attention is paid to the analysis of the system of lubrication of the internal combustion engine. Lubrication system is required in order to reduce friction, take heat away from the parts that are rubbing and diversion of products of wear and combustion of fuel. There are four main types of lubrication: periodic feeding under pressure (pulsating), splashing in the lubricant bath, combined, with constant feeding of oil under pressure. Modern engines use all the methods of lubrication, so it is called combined. Lubrication is used in the engines of the old structure. Grast is splattered as a result of impact on the surface of the protrusions on the covers of crammed heads of shatuns. [1] When hit, splashes are formed and lubricants fall on the trot surface or through lubricant channels located above these surfaces. Circulation lubrication under pressure is when the grate to the surface of the friction lubrication is served from the carter through the channels under pressure, which creates a lubrication pump, after which it flows back into the carter. Lubrication under pressure ensures the supply to the drones, the required amount of lubricant, as well as its reliable and intense circulation. Conventional internal combustion engines are usually lubricated by a mechanical pump powered by the engine through belts, or gears. The speed of the pump, and therefore the pressure of the lubricant and the flow rate of the lubricant, is a function of the speed of rotation of the engine. As well as the requirements for electromechanical lubrication system were formulated. Object of research – lubrication system Subject of study – lubricant pump Goal of research: is to create electromechanical control system for lubrication of the internal combustion engine. The second section highlighted the types of control of the electromechanical lubrication system of the internal combustion engine. With the help of an electric motor, we can change the speed of the lubricant depending on the load. Based on the desired lubricant pressure and the present lubricant pressure signal. As the engine speed increases, the engine’s torque increases, it will not peak and then decrease as the engine speeds increase. As previously mentioned, the conventional internal combustion engine is lubricated by a mechanical lubricant pump, powered by an engine through belts or gears. Thus, the speed of the mechanical lubricant pump is proportional to the speed of rotation of the engine. This section also shows the structural control scheme of electromechanical lubrication system Structural control scheme consists of microprocessor, engine control scheme of lubricant pump, engine that controls the revs of the lubricant pump, lubricant pump, from the hydraulic combustion engine revor, from the fuel flowor and lubricant pressure giver. One of the methods for determining engine torque is to calculate engine torque as a linear function of fuel consumption. Thus, when the engine operates with fuel consumption of 100%, the microprocessor determines that the engine torque is 100% of the maximum torque of the engine. When the engine operates with fuel consumption of 50%, the microprocessor determines that the engine torque is 50% of the maximum torque. Engine torque approaches can be used, in addition to linear ratios, to provide a more accurate definition of engine torque. A curve showing engine torque as a fuel consumption function for a particular engine can be formed experimentally or based on conventional equations. This curve can be programmed to a microprocessor. The microprocessor determines engine torque based on fuel consumption using such a curve (or using equations representing a curve). Also, the second section describes the algorithm of electromechanical control system of lubricant pump The third section models and describes the electromechanical lubrication system in Matlab[4]. Different engine and lubricant modes were described at different temperatures [5]. The results of the study are given in the form of modeling results. Based on the results, we see that the electromechanical lubrication system compensates for the shortcomings of the classical lubrication system. Electromechanical lubrication system, will be able to provide the desired pressure and performance of the lubricant, depending on the quality of lubricants and operating modes of the engine. Keywords: internal combustion engine, lubrication system, motor lubrication, bridge pump, electromechanical system, control system. Referenses: l. Анісімов В.Ф., Дмитрієва А.В., Севостьянов С.М. Тепловийтадинамічнийрозрахунокавтомобільнихдвигунів. Навчальнийпосібник. Вінниця, 2009 – 130с. 2. Башта Т. М., Руднев С. С., Некрасов Б. Б. и др. Гидравлика, гидрома-шины и гидроприводы.– М.: Машиностроение, 1982.– 423 с. 3. United States Patent Application Publication № US 2004/0187835 A1 Sep. 30, 2004 Brian D. Hoff, Kris William Johnson, Marcelo C. Algrain, SivaprasadAkasam. 4. Katsuhiko Ogata, Modern Control Engineering, Fifth Edition, 2010 – 950с 5. Fuel injection systems (gasoline), Ricardo Pimenta 1050799, Fabio Daniel 1050357