Oil ageing ‐ drain period in a petrol engine

Kaleli̇, Hakan; Yavasliol, Irfan

doi:10.1108/00368799710165747

Cited by 16 publications

(18 citation statements)

References 5 publications

(3 reference statements)

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“…Kinematic viscosity ν (Figure 10) of the thermally degraded oil in this study varied linearly with ageing time, due to the buildup of insolubles and evaporative loss of more volatile components observed by Kaleli and Yavslioli [24]. This variation pattern of viscosity with ageing agrees with the results of Singh et al [25].…”

Section: Viscosity and Total Acid Number (Tan)supporting

confidence: 88%

Novel Chromatic Technique Based on Optical Absorbance in Characterizing Mineral Hydraulic Oil Degradation

Ossia

Kong

2012

Advances in Tribology

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A low cost, compact, real-time, and quick measurement optical device based on the absorbance of white light, which comprised of photodiodes in a 3-element color-sensor, feedback diodes, water and temperature sensing element, and so on, was developed and tested in low absorption mineral oil. The device, a deviation from conventional electrical, mechanical, and electrochemical techniques, uses color ratio (CR) and total contamination index (TCI) parameters based on transmitted light intensity in RGB wavelengths for oil condition monitoring. Test results showed that CR corroborated CIE chromaticity (- Coordinates) and increased with oil degradation unlike Saturation and Hue . CR was found to be independent of the particulate contaminants of oil, but dependent on chemical degradation. TCI depended on both chemical degradation and particulate contaminants in oil, being most sensitive in the blue wavelength range and least in the green. Furthermore, results agreed with those of viscometry, total acid number (TAN), and UV-VIS photospectrometry. CR and TCI gave clearer indication of oil degradation than key monitoring parameters like TAN and were found to be effective criteria for characterizing the degradation of hydraulic mineral oils.

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Section: Viscosity and Total Acid Number (Tan)supporting

confidence: 88%

Novel Chromatic Technique Based on Optical Absorbance in Characterizing Mineral Hydraulic Oil Degradation

Ossia

Kong

2012

Advances in Tribology

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“…As a result, current engine lubricants used in internal combustion engines (ICE) are responsible for reducing engine friction losses and contact wear. Therefore, the impact of engine oil viscosity and aging is of prime interest with regard to the motion of passenger cars [20]. Several methods were presented and discussed in the open literature to study the variation of lubricant viscosity and oil degradation over time.…”

Section: Introductionmentioning

confidence: 99%

Lubrication Performance of Engine Commercial Oils with Different Performance Levels: The Effect of Engine Synthetic Oil Aging on Piston Ring Tribology under Real Engine Conditions

2018

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To further improve efficiency in automotive engine systems, it is important to understand the generation of friction in its components. Accurate simulation and modeling of friction in machine components is, amongst other things, dependent on realistic lubricant rheology and lubricant properties, where especially the latter may change as the machine ages. Some results of research under laboratory conditions on the aging of engine commercial oils with different performance levels (mineral SAE 30, synthetic SAE10W-40, and bio-based) are presented in this paper. The key role of the action of pressure and temperature in engine oils’ aging is described. The paper includes the results of experiments over time in laboratory testing of a single cylinder motorbike. The aging of engine oil causes changes to its dynamic viscosity value. The aim of this work is to evaluate changes due to temperature and pressure in viscosity of engine oil over its lifetime and to perform uncertainty analysis of the measured values. The results are presented as the characteristics of viscosity and time in various temperatures and the shear rates/pressures. This paper also includes a Computational Fluid Dynamics (CFD) model, applying the experimental results in the piston ring tribology problem.

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“…According to Coates and Setti (1986), the maximum permissible changes (increasing or decreasing) in viscosity is 25%. An increase in viscosity is caused by contamination, nitration, or oxidation, whereas a decrease in viscosity occurs when the amount of fuel in the oil increases (Kaleli and Yavasliol, 1997). Temperature has a direct effect on the oil viscosity.…”

Section: Kinematic Viscositymentioning

confidence: 99%

“…They rotated the viscometer in accordance with the American Society for Testing and Materials (ASTM) D445 stipulations, and their results showed that the temperature is inversely correlated with viscosity; therefore, any decrease in the temperature will increase the engine oil viscosity. In addition, in the study by Kaleli and Yavasliol (1997), an SAE viscosity grade of 20W-50 was used in 2 different engines. The results showed that after 15,000 km, the viscosity of the oil used in the second engine decreased at 40℃ from 160.16 cSt to 103.02 cSt, and at 100℃ the viscosity of the oil decreased from 18.09 cSt to 13.24 cSt.…”

Section: Kinematic Viscositymentioning

confidence: 99%

“…Another parameter used to determine the oil quality is the flash point. The flash point is the lowest temperature that causes the vapors in air to burn momentarily or ignite when exposed to a naked flame or spark under specific laboratory conditions (Kaleli and Yavasliol, 1997;Ljubas et al, 2010) The second method is called the Pensky-Martens closed cup method, which is used for fuels with high flammability, and is conducted at temperatures below 50°C in a closed container (Azad et al, 2012). However, if heating of the oil continues after the flash point, a temperature will be reached at which the vapors from the oil are released fast enough to support combustion for a minimum of 5 seconds under specific laboratory conditions.…”

Section: Flash Point and Fire Pointmentioning

confidence: 99%

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Analysis of 0W-20 Totachi Brand Oil to Determine the Rate of Oil Deterioration

Hameed

Ali

2020

UKH J SCI ENG

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Engine oil or lubricating oil has a major effect on the engine life and the proper operation of any engine. Changing the engine oil before it is due increases a customer’s cost. The lubricating oil in every engine performs many functions such as reducing friction, preventing corrosion, protecting the engine against wear, removing all impurities, lubricating the moving parts, and cooling the engine parts. There are several causes for the deterioration of lubricating oil, including the properties of the oil, oil quality, and high engine temperatures. Consequently, the deteriorated oil must be replaced at a specified mileage or at specific time intervals to get the best engine performance. It is very important to know when to change the oil, because changing the oil too late can affect the engine parts and vehicle performance. However, replacing the oil too early influences the economy and environment and is an inefficient use of depleting resources. This study describes the kinematic viscosity, flash point, and fire point of multigrade Society of Automotive Engineers (SAE) 0W-20 Totachi (Totachi Industrial Co. Ltd., Japan) international brand oil, which has a 10,000 km guarantee and is approved by and used in 10 different vehicle brands, to determine the rate of deterioration of the parameters. These parameters are the most important physical behaviors of lubricating engine oils. Having information about these parameters is very important for maintaining an engine’s lifespan. The results of this study showed that after 10,000 km, the Totachi oil parameters such as the kinematic viscosity at cold start, at 40°C and at 100°C, the flash point, and the fire point decreased by 22.03%, 25.98%, 26.75%, 16.94% and 17.34%, respectively, from the base values, and that the oil is suitable to use for 10,000 km.

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Oil ageing ‐ drain period in a petrol engine

Abstract: The authors wish to thank Shell Oil Company for providing test facilities.

Cited by 16 publications

References 5 publications

Novel Chromatic Technique Based on Optical Absorbance in Characterizing Mineral Hydraulic Oil Degradation

Novel Chromatic Technique Based on Optical Absorbance in Characterizing Mineral Hydraulic Oil Degradation

Lubrication Performance of Engine Commercial Oils with Different Performance Levels: The Effect of Engine Synthetic Oil Aging on Piston Ring Tribology under Real Engine Conditions

Analysis of 0W-20 Totachi Brand Oil to Determine the Rate of Oil Deterioration

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