Autonomous electric power source energy efficiency improvement by internal combustion engine gases distribution control

Abstract

The use of generators with converters allows, depending on the load of the network, to regulate the speed of the internal combustion engine, thereby reducing fuel consumption and increasing the overall efficiency of the system as a whole. However, it should be noted that the optimal operation of the internal combustion engine is possible at a certain engine speed. A decrease in the engine speed leads to a deterioration in the filling of the fuel-air mixture and the exhaust of the engine, accompanied by an intake of exhaust gases into the intake manifold and the ejection of part of the combustible mixture into the exhaust pipe. The paper presents the general concept of creating a control system for an autonomous power source based on an internal combustion engine and an inverter. The expediency of adjusting the opening and closing angles of an internal combustion engine that works as a source of mechanical energy of an autonomous source of electrical energy is proved. The use of this system allows to reduce unit costs by 2 times when generating electric energy. Based on the gas distribution diagram of the internal combustion engine, the dependence of the change in the opening and closing angles of the intake and exhaust valves on the power of an autonomous energy source is proposed.