Monitoring Technical Status of Engine Bearings by Pressure Parameters in Central Oil Line
Design improvement of motor-and-tractor internal combustion engines is aimed at differentiating the operating parameters of the lubrication system depending on the change in the operating modes and conditions, which increase in the precision of parts manufacturing, reduction of difference tolerances of operating process parameters and use of microprocessor control systems. Up to 20% of engine failures are failures connected with the wear of crankshaft friction bearings. Their known diagnostic methods have significant drawbacks: the need to take the engine out of operation, large time expenditures for diagnostics, impossibility of in-place determining the technical status of some elements. Today, the automotive industry is significantly ahead of the production of diagnostic tools. There appear concepts and models of machines, for which it is not enough to use low-sensitive pressure sensors. For such models, it is recommended to control pressure pulsations in the ICE oil line to determine the technical status and lifetime of internal combustion engines. When monitoring the technical status of main bearings, the diagnostics is performed at the crankshaft speed n = 880 , min−1, when using the complex for diagnosing crank-and-rod mechanisms and mechanisms of the lubrication system. The diagnostic parameter is the difference of minimum pressure amplitudes when the bearing operates through a cycle, with and without load.
KeywordsInternal combustion engine Bearings Crank-and-rod mechanism Clearances Pressure parameters
The work was supported by Act 211 Government of the Russian Federation, contract № 02.A03.21.0011.
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