Cause-Effect Relationships of the Parameters of the Main Resource Groups of Yamz-236/238 Engines

Abstract

Constructive improvement of mobile energy vehicles, in particular their main unit – the internal combustion engine, is aimed at: ensuring the differentiation of the parameters of the functioning of the system mechanisms depending on the variability of the conditions and modes of operation of the machines; increasing the technical resource when using the machines as intended in the specified operating conditions. During the analysis of literary sources, it was established that the existing methods and means of diagnosing vehicle engines do not fully allow determining their current technical condition, which requires the development of mathematical models for automating the process of diagnosing their components and parts. Internal combustion diesel engines of the YaMZ-236/238 family, which are included in the power units of most tractors and cars, were chosen as the object of diagnosis. The use of modern non-contact and non-disassemble diagnostic methods based on the analysis of the initial parameters of the diesel engine, functionally related to its structural parameters, will allow solving the task of reducing the labor intensity of the work, the quality of diagnostics, however, they are not sufficiently researched. Therefore, to determine the technical condition of engines, it is necessary to use modern non-contact and non-destructive diagnostic methods, which are based on the analysis of initial parameters functionally related to structural parameters. The article presents the cause-and-effect relationships of the parameters of the main resource groups of internal combustion diesel engines of the YaMZ-236/238 family. A graph-model of the interrelationships of the controlled parameters of the main resource groups of the YaMZ-236/238 engines and their defects was built.