Diesel Engine Condition Through Oil Analysis

Frassa, K. A.; Sarkis, A. B.

doi:10.4271/680759

Cited by 12 publications

(2 citation statements)

References 9 publications

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“…In view of the ease with which infrared can be used to monitor oil oxidation, several attempts have been made to obtain quantitative information from infrared spectra of used oils starting with the development of the double-beam instrument which takes the fresh oil as a baseline for comparison with the absorption obtained for the used oils. Such a procedure gives a direct indication of the extent of oxidation of the oil.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Oxidation in Automotive Crankcase Lube Oil: Effects of Metal and Water Activity

Egharevba

Maduako

2002

Ind. Eng. Chem. Res.

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The changes in oxidation stability of two grades of crankcase lube oil, monograde (SAE 40) and multigrade (SAE 20W50), and their base oils were monitored by measuring their carbonyl peak index with respect to time in order to corroborate the results of sludge deposit and soluble acidity characteristics. The carbonyl peak index was calculated as the difference in the ratios of the absorbance of the carbonyl band at 1700 cm -1 and of the basic peak methyl stretching vibration at around 3000 cm -1 at oxidation time t and the start of the experiment. The results showed that the base oils were oxidized to a greater extent than the formulated oils. The monograde oil and its base oil had higher carbonyl peak indexes than their respective multigrade counterparts, showing that the monograde oils were less resistant to oxidation than the multigrade oils. However, results of sludge deposits and soluble acidity showed that the multigrade oils formed more oxidation products than the monograde oils, which also incidentally suggests that the multigrade oils deteriorate faster. The two conflicting observations therefore suggest that the types of oxidation products formed from the two oils were different even though initiated by similar mechanisms. The effects of metals (zinc, nickel, and aluminum), as well as the effect of water (on the activity of the metals), on the overall carbonyl peak index are reported.

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Section: Introductionmentioning

confidence: 99%

Assessment of Oxidation in Automotive Crankcase Lube Oil: Effects of Metal and Water Activity

Egharevba

Maduako

2002

Ind. Eng. Chem. Res.

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“…The results of these studies have helped greatly to extend the time between oil drainage periods. Attempts have also been made to evaluate the thermal behaviour of base oils by'lR spectroscopic means [8][9]. Attempts have also been made to evaluate the thermal behaviour of base oils by'lR spectroscopic means [8][9].…”

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confidence: 99%

Testing thermal stabilities of base oils and their additives via high-temperature infrared spectroscopy

Naga

Salem

1986

Journal of Thermal Analysis

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The thermal stabilities of base oils and their additives could be examined by employing an infrared spectroscopic technique. As the heat temperature was increased, changes in absorption were recorded at different wavelengths characteristic of the chemical groups. These changes were observed to occur slowly at first, but then turn to become more marked at specific temperatures. The magnitudes of these changes and temperatures were taken as indications of the thermal stabilities of the samples. The thermal stability was found to decrease in the following sequence: aromatics > naphthenes > hetero compounds > substituted aromatic rings > paraffins.

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The use of surface metrology instrumentation to measure rates of wear of internal combustion engine components

Picken

Hassaan

Buttery

1981

Wear

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Diesel Engine Condition Through Oil Analysis

Cited by 12 publications

References 9 publications

Assessment of Oxidation in Automotive Crankcase Lube Oil: Effects of Metal and Water Activity

Assessment of Oxidation in Automotive Crankcase Lube Oil: Effects of Metal and Water Activity

Testing thermal stabilities of base oils and their additives via high-temperature infrared spectroscopy

The use of surface metrology instrumentation to measure rates of wear of internal combustion engine components

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