Analytical Control of the Mass of Injected Fuel into Diesel Engine Cylinder

In real operating conditions, the engine indicator diagram is the most common source of data foranalyzing its current technical condition. Despite this, it is not possible to determine all diagnosticparameters directly from it, for example, the mass of fuel injected into the cylinder. To determine thefuel supply, it is possible to use the calculation of heat release in the cylinder or by solving a systemof differential equations describing the working process in the cylinder. However, in those cases, theapproximate value of the average temperature of the cylinder walls is unknown, as well as which ofthe empirical formulas for calculating the heat transfer from the gases to the cylinder walls should beused. Therefore, an additional method for calculating the mass of fuel injected into the cylinder wasdeveloped, in which the actual working process, under certain assumptions, was represented by acalculated cycle with isochoric and isobaric sections of fuel combustion. As a result, two systems ofalgebraic equations were compiled, the solutions of which can be used to find the mass of injectedfuel. During the research, the process of solving equations was modernized, which allowed for asignificant increase in accuracy.