Analytical Control of the Mass of Injected Fuel into Diesel Engine Cylinder
Keywords:
Indicator diagram, Sabaté cycle, Mass of injected fuel, Thermodynamic equationsAbstract
In real operating conditions, the engine indicator diagram is the most common source of data for analyzing its current technical condition. Despite this, it is not possible to determine all diagnostic parameters directly from it, for example, the mass of fuel injected into the cylinder. To determine the fuel supply, it is possible to use the calculation of heat release in the cylinder or by solving a system of differential equations describing the working process in the cylinder. However, in those cases, the approximate value of the average temperature of the cylinder walls is unknown, as well as which of the empirical formulas for calculating the heat transfer from the gases to the cylinder walls should be used. Therefore, an additional method for calculating the mass of fuel injected into the cylinder was developed, in which the actual working process, under certain assumptions, was represented by a calculated cycle with isochoric and isobaric sections of fuel combustion. As a result, two systems of algebraic equations were compiled, the solutions of which can be used to find the mass of injected fuel. During the research, the process of solving equations was modernized, which allowed for a significant increase in accuracy.
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Copyright (c) 2025 Oleksiy Yeryganov, Vladyslav Kyrnats, Alexey Popovskyi; Vitalii Gunchenko, Vladymyr Glebov, Oleksiy Melnyk
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