Kinetic analysis of oxidation characteristics in synthetic motor oil

Проблема и цель. Целью настоящего исследования является оценка влияния частоты ультразвука на смазочные свойства моторных масел и износ узлов трения двигателей при ультразвуковой обработке масел. Методология. Предметом исследований является ультразвуковая обработка моторных масел и вызываемые ею изменения износа узлов трения. Были проведены следующие эксперименты: оценка влияния частоты ультразвука на изменение коэффициента поверхностного натяжения моторных масел при их ультразвуковой обработке; оценка влияния частоты ультразвуковой обработки смазки на износ образцов пар трения при износных испытаниях образцов на машине трения 2070 СМТ 1М. Обработка моторного масла ультразвуком проводилась с помощью экспериментального устройства для генерации ультразвука переменной частоты. Обработке подвергались моторные масла: масло моторное «LukoilDIESELOIL» 10W-40 минеральное; масло моторное «SHELL Helix HX7 Diesel» 10W-40 полусинтетическое; масло моторное «ZIC X7 Diesel» 10W-40 синтетическое. Результаты. Были получены расчетно-экспериментальные зависимости коэффициента поверхностного натяжения от частоты ультразвукового сигнала для минерального, полусинтетического и синтетического моторных масел, а также зависимости фактора износа образцов пар трения от частоты ультразвука длясинтетического моторного масла.Определен диапазон частот ультразвука (17-44 кГц), при котором ультразвуковая обработка синтетического моторного масла дает наибольшее снижение износа пар трения Заключение. На основании проведенных исследований рекомендуется проводить обработку моторного масла ультразвуком в диапазоне частот от 17 до 44 кГц. Рекомендуется также продолжение работ по доработке устройства для генерации ультразвука оптимальной частоты и адаптации его в систему смазки реальных дизельных автотракторных двигателей. Problem and purpose. The purpose of this study was to assess the efect of ultrasound frequency on lubricating properties of engine oils and the wear of friction units of engines when ultrasonic treatment of oils. Methodology. The subject of the research was the ultrasonic treatment of engine oils and the changes in the wear of friction units caused by it. The following experiments were carried out: evaluation of the efect of the ultrasound frequency on the change in the surface tension coefcient of motor oils when their ultrasonic treatment; evaluation of the efect of the frequency of ultrasonic treatment of the lubricant on the wear of samples of friction pairs during wear tests of samples on a 2070 SMT 1M friction machine. Ultrasonic treatment of engine oil was carried out using an experimental device for generating ultrasound of variable frequency. The following engine oils were processed: motor oil "Lukoil DIESEL OIL" 10W-40 mineral; motor oil "SHELL Helix HX7 Diesel" 10W-40 semi-synthetic and motor oil "ZIC X7 Diesel" 10W-40 synthetic. Results. Authors got calculated and experimental dependences of the surface tension coefcient on the frequency of an ultrasonic signal for mineral, semi-synthetic and synthetic motor oils, as well as the dependence of the wear factor of samples of friction pairs on the frequency of ultrasound for synthetic engine oil. The frequency range of ultrasound (17-44 kHz) was determined, in which the ultrasonic treatment of synthetic motor oil gave the greatest reduction in the wear of friction pairs. Conclusion. Based on the studies carried out, it is recommended to treat engine oil with ultrasound in the frequency range from 17 to 44 kHz. It is also recommended to continue work on improving the device for generating ultrasound of the optimal frequency and adapting it to the lubrication system of real diesel automotive engines.

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Changes in the properties of semi-synthetic motor oil Castrol 10W-40 during its use in the diesel engine of commercial vehicles

10.23939/cte2021.01.094 ◽

2021 ◽

Keyword(s):

Diesel Engine ◽

Motor Oil ◽

Commercial Vehicles ◽

Synthetic Motor

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The study of the magnetization of the system protons in some synthetic motor oil 5W-40 as viscous-flow state oligomers

ВЕСТНИК ПЕРМСКОГО УНИВЕРСИТЕТА ФИЗИКА ◽

10.17072/1994-3598-2017-2-40-48 ◽

2017 ◽

pp. 40-48

Author(s):

Igor Izmestiev ◽

◽

Anna Gusmanova ◽

Olga Gusmanova ◽

◽

...

Keyword(s):

Viscous Flow ◽

Flow State ◽

Motor Oil ◽

Synthetic Motor

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Better at What?

Industrial and Organizational Psychology ◽

10.1017/s1754942600002509 ◽

2010 ◽

Vol 3 (3) ◽

pp. 340-343 ◽

Cited By ~ 1

Author(s):

Craig J. Russell

Keyword(s):

Internal Combustion Engines ◽

Cost Effective ◽

Internal Combustion ◽

Theory And Practice ◽

Combustion Engines ◽

Motor Oil ◽

Synthetic Motor ◽

Strongly Agree ◽

Better Than

In reading the title of Johnson et al.'s (2010) article on synthetic validity, I immediately asked myself “Better at what?” Motor oil serves three functions in internal combustion engines: lubricate, cool, and clean engine parts. There is little doubt that synthetic motor oil does all three of these better than nonsynthetic motor oil, although some might argue that it is not as cost effective. Johnson et al. described two approaches to synthetic validity and then argued why synthetic validity is “the best approach for many situations.” I strongly agree with their contention that synthetic validity is “practically useful” and with their less directly stated contention that it also holds value in developing theory. Hence, I will limit my comments exactly to how synthetic validity inferences might best contribute to the complimentary goals of advancing theory and practice, although these might cause Johnson et al. to rethink some of their observations.

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The Technology of the Near-Field Interference Microwave Sensing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.870.730 ◽

2016 ◽

Vol 870 ◽

pp. 730-734

Author(s):

V.P. Belichenko ◽

A.S. Zapasnoy ◽

A.S. Miron'chev ◽

P.V. Shestakov

Keyword(s):

Near Field ◽

Coaxial Line ◽

Motor Oil ◽

Frequency Range ◽

Main Attention ◽

Motor Fuels ◽

Microwave Microscope ◽

Synthetic Motor ◽

Test Objects

We describe the operation of a simple near-field interference microwave microscope. The microscope contains two identical probes which are connected to the ends of segments of the coaxial transmission line. The probes are constructed from an open-ended conical coaxial line and are excited by applied microwave voltage in the frequency range of 0.6 – 7.0 GHz. The computer simulation of the field distribution near the aperture of a separate probe was performed. The test objects are placed in the gap between the probes apertures. The main attention was concentrated on motor fuels to detect other impurities. In particular, diesel fuel was studied with impurities in the form of kerosene and synthetic motor oil in different proportions. It is shown that the microscope can reliably detect these impurities even if their content is relatively small. It was also demonstrated that the microscope can be used for determination of the alcohol quality and spirit-based solutions.

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