Optimization of Reliability Indicator Calculation for a Detachable Camshaft Lobe
DOI:
https://doi.org/10.52171/herald.375Keywords:
detachable camshaft with removable cam lobes, cam lobe, reliability indicators, pre-repair service life, mathematical-statistical analysis, statistical seriesAbstract
The article evaluates the reliability indicators of the pre-repair service life of a detachable camshaft lobe used in internal combustion engines based on mathematical and statistical analysis methods. The study is based on the results of cam lobe height measurements obtained from 50 camshaft samples. On the basis of the initial experimental data, a statistical series was constructed, and the optimal number and length of intervals were determined. Empirical frequencies and probabilities were calculated, and the mean value and standard deviation of the reliability indicator were determined.
To verify the reliability of the data, the presence of outliers was analyzed using both the hˉ±3σ criterion and the Irwin criterion. The results of the calculations showed that all measurement data are valid and suitable for statistical processing. The empirical distribution of the reliability indicator was graphically represented using a histogram, a distribution polygon, and a cumulative empirical probability curve. Graphical analysis made it possible to quickly determine the relative and absolute number of camshafts requiring repair up to a given height value.
In addition, the coefficient of variation characterizing the dispersion of the reliability indicator was calculated, and based on its numerical value, the appropriateness of selecting a theoretical distribution law for the pre-repair service life was substantiated. The obtained results are of significant scientific and practical importance for predicting the service life of camshafts, optimizing maintenance intervals, and improving the reliability of internal combustion engines.
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Copyright (c) 2026 A.G. Huseynov, A.F. Karimov, М.B. Huseynzade, N.M. Mirzazade
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