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Regulation of the errors of indirect measurements of acceptance and acceptance tests of engines
https://doi.org/10.32446/0368-1025it.2022-8-23-27
Abstract
In order to control the quality of assembly and adjustment of engines, acceptance tests have carried out. The conclusion about the quality of the repaired engine depends on the measurement information received during acceptance tests. Therefore, it is important to ensure the accuracy and reliability of the measurement results of the controlled engine parameters. Permissible errors of the main controlled parameters of engines during acceptance tests have set in GOST 18509-88 « Tractor and combine diesel engines. Methods of bench tests», but this document does not contain requirements for the permissible error in measuring engine power. Based on the probability theory, the formula for calculating the power measurement error has derived. Based on the derived formula and taking into account the permissible measurement errors (according to GOST 18509-88), the permissible measurement errors of power of repaired engines of various brands have calculated. A comparative analysis of the calculated value of the permissible error in measuring the power of engines of various brands and the actual error in measuring power during running-in on the stands KI-5274, KI-5540M, KI-5541M, KI-542M, KI-2118A GOSNITI. It had found that the power measurement errors exceed the maximum allowed. To increase the reliability of power control results, recommendations have been developed for calculating acceptance boundaries with an off set relative to the nominal power value. The maximum errors of power measurement of various engine brands and acceptance limits have calculated depending on the required reliability. Application of the method will increase the reliability of control results at the stage of acceptance tests of repaired engines.
About the Authors
O. A. Leonov
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Oleg A. Leonov
Moscow
N. Z. Shkaruba
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Nina Zh. Shkaruba
Moscow
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Review
For citations:
Leonov O.A., Shkaruba N.Z. Regulation of the errors of indirect measurements of acceptance and acceptance tests of engines. Izmeritel`naya Tekhnika. 2022;(8):23-27. (In Russ.) https://doi.org/10.32446/0368-1025it.2022-8-23-27
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