Harmonization of the Constructive and Controllable Parameters of the Diesel Engine on the Basis of the Analysis of the Processes in the Cylinder

Abstract

The quality of the diesel engine largely depends on the consistency constructive and controllable parameters of fuel equipment and combustion chamber. The specified line is provided by this combination of parameters, which are complex processes of flow of fuel into the cylinders, distribution of the sprayed fuel jets and their interaction with the surfaces of the combustion chamber, the process heat from fuel combustion provides excellent fuel economy with acceptable environmental characteristics of the engine. The method of selecting combinations of parameters should be based on adequate description and quantification of the main processes in the engine cylinder with process heat from the combustion. To solve the problem solely according to the calculations is currently not possible. This is because, given the extreme complexity and very high processes, researchers have not yet created an adequate mathematical model. The problem solved by calculation and experiment, combining physical simulation of processes of fuel injection, the movement of the spray of fuel, their interaction with each other, with the surfaces of the combustion chamber and heat dissipation as the result of the analysis of indicator diagrams of diesel. The result of applying this method is the refinement of perception that occurs in the diesel process, in particular the temporal change of the geometrical and mass properties of fuel jets, what are the dates of deposition of fuel on the surface of the piston and the cylinder head, which factors cause changes to the shape of the fuel characteristics during combustion. The application of this methodology gives an opportunity to outline such ways of organizing processes in the cylinder, which provide high economic and environmental performance of the engine during its creation and exploitation. Keywords: working process of diesel fuel, the movement of the fuel jets, interaction of jets with the surface of the combustion chamber, heat release during combustion.

Computer simulation of the dynamics of heat release in diesel cylinders

“…One part of the plant was a diesel engine, which includes a SAK N670 brand RAPIDO electric brake stand and a 250 kW pendulum balancing machine in figure 1, as well as a set of equipment for indication, consisting of a PS-01 piezoquartz dynamic pressure sensor, a differential charge amplifier AQ02-001, NI CompactDAQ 9178 data acquisition and process control systems and laptop. The determination of the indicators of the dynamics of heat generation in the cylinders of a diesel engine was carried out according to [12] according to the following dependencies.…”

“…The method for calculating the dynamics of heat release in a diesel engine is based on the material obtained in the experiment data in the form of an indicator diagram when a diesel engine is operating in various modes, in which the first law of thermodynamics is applied, was developed at the Central Research Diesel Institute in Moscow, Russia. On the basis of the developed method for determining the dynamics of heat release, based on the obtained experimental data in the form of an indicator diagram, with a sufficient degree of probability it is possible to obtain very reliable data on the nature of the combustion process of fuels with different fractional composition [12]. This method, in comparison with the above, reflects the reality of the processes occurring in the diesel cylinder, which is the basis for a comprehensive study of the issue.…”