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Study on Estimation Method of Anti-oxidation Performance for Engine Oil Deterioration Monitoring System

Article of Honda R&D Technical Review Vol.19 No.2


The research discussed in this paper demonstrated the existence of a strong correlation between the anti-oxidation performance of engine oil and the production of sludge. Analysis of the deterioration mode of anti-oxidation performance in component tests and engine bench tests of engine oil indicated that the reaction mechanisms causing engine oil deterioration could be approximated by the superpositioning of zero- and first-order reactions. The results of these tests also demonstrated that heat, air, NOx and unburnt fuel are major factors in the deterioration of anti-oxidation performance. Detailed analysis resulted in the proposal of a general equation for the deterioration of oil anti-oxidation performance, which enabled the degree of deterioration to be estimated.
Actual vehicle tests showed that the use of the equation enabled accurate estimation of the deterioration rate of anti-oxidation performance, indicating that the method has potential for onboard use.


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Author (organization or company)

Yosuke OKUYAMA(Automobile R&D Center)、Koichiro AIKAWA(Automobile R&D Center)、Wataru HOSHIKAWA(Automobile R&D Center)、Masashi MARUYAMA(Automobile R&D Center)

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