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The i̇nfluence of water on the change i̇n engi̇ne oi̇l quali̇ty i̇ndi̇cators

https://doi.org/10.26518/2071-7296-2021-18-4-406-415

Abstract

Introduction. One of the main types of deposits in an internal combustion engine is an emulsion or sludge formed by water, decomposition of fuel residues and solid residues. The sludge usually settles on the colder surfaces of the engine, such as the bottom of the crankcase pan, valve chambers and upper boards. The main problem is that this type of deposits can be collected by the engine oil and transferred to areas such as the oil pump, intake valve or oil channels, where the sludge can interfere with the flow of oil and cause a failure of the lubrication mode. In addition to the disruption in the operation of the above-mentioned systems, the engine oil quality indicators are also undergoing changes for the worse.
Materials and methods. To monitor the condition of the engine oil, it is necessary to determine the characteristics of its performance, such as: kinematic viscosity at 40 oC and at 100 oC, acid number, base number and determine the number of elements – indicators of additives and wear products contained in the engine oil. The viscosity was determined using a Stabinger SVM 3000 viscometer. It measures the dynamic viscosity and density of oils and fuels in accordance with ASTM D7042 and automatically calculates the kinematic viscosity, viscosity index and outputs the measurement results. The acid and base numbers were determined using an automatic titrator TitroLine alpha plus, and the presence of indicator elements in engine oil using an inductively coupled plasma optical emission spectrometer of the iCAP 7000 series, designed for analysis and determination of the number of indicator elements in liquid and solid samples.
Results. The dynamics of changes in the performance characteristics of the Gazpromneft Diesel Ultra 10W-40 engine oil with an extended replacement interval, which is applicable for equipment operating in severe conditions, depending on the water content in the samples of this lubricant, was analyzed.
Conclusion. The consequences that may occur due to water entering the engine oil are indicated.

About the Authors

S. V. Korneev
Siberian State Automobile and Highway University (SibADI); Omsk State Technical University
Russian Federation

Sergei V. Korneev – Dr. of Sci., Professor of the Thermal Engines and Tractor Electrical Equipment Department; Professor of the Chemistry and Chemical Technology Department

Omsk



S. V. Pashukevich
Omsk State Technical University
Russian Federation

Sofia V. Pashukevich – Postgraduate student of the Chemistry and Chemical Technology Department

Omsk



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For citations:


Korneev S.V., Pashukevich S.V. The i̇nfluence of water on the change i̇n engi̇ne oi̇l quali̇ty i̇ndi̇cators. The Russian Automobile and Highway Industry Journal. 2021;18(4):406-415. (In Russ.) https://doi.org/10.26518/2071-7296-2021-18-4-406-415

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ISSN 2071-7296 (Print)
ISSN 2658-5626 (Online)