Connection of diagnostic parameters with the technical condition of the engine

The paper presents the results of the study experimental verification of theoretical prerequisites and methodological developments to establish the connection of diagnostic parameters with indicators of the technical condition of the engine of the Zavolzhsky Motor Plant. Experimentally, the most informative, in terms of sensitivity and stability of diagnostic signs, diagnostic modes were obtained. The method and technology of differential engine diagnostics have been developed and tested in production conditions. And also in the article the results of the analysis of the obtained data carried out in a complex of laboratory and operational tests, including experimental studies to optimize the speed mode of engine diagnostics when cranking the crankshaft; identification of the effect of valve misalignments and decompression in the engine cylinders being tested at the time of the resistance to cranking and compression resistance; study of the technical condition parameters affecting the moment of resistance to cranking of the crankshaft and compression resistance of the tested cylinders. According to the proposed method, experimental dependences of the change in the torque of the rolling resistance and compression resistance of the internal combustion engine were obtained.