A study of the tribological impact of biodiesel dilution on engine lubricant properties
The switch from petro-diesel fuel to biodiesel blends for Compression Ignition engines have raised tribological performance concerns among major automobile manufacturers. Biodiesel dilution on engine lubricants could have adverse long-term effects on the engine efficiency, which will reduce the fuel...
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Institution of Chemical Engineers
2017
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my.utm.757042018-04-27T01:46:17Z http://eprints.utm.my/id/eprint/75704/ A study of the tribological impact of biodiesel dilution on engine lubricant properties Hamdan, S. H. Chong, W. W. F. Ng, J. H. Chong, C. T. Rajoo, S. TJ Mechanical engineering and machinery The switch from petro-diesel fuel to biodiesel blends for Compression Ignition engines have raised tribological performance concerns among major automobile manufacturers. Biodiesel dilution on engine lubricants could have adverse long-term effects on the engine efficiency, which will reduce the fuel economy, thus, leading to higher greenhouse gas emissions. Therefore, this study investigates the tribological impact of palm methyl ester (PME) diluted in SAE5W40 and SAE10W40 engine lubricants along different lubrication regimes under engine cold start condition. Through lubrication Stribeck curve analysis conducted using a pin-on-disc tribometer, coefficient of friction (CoF) for both engine lubricants showed parabolic maximum behaviour with increasing PME dilution. The CoF reduction beyond these peak values is attributed to the improved friction modifier effect from the now-dominant PME but with reduced load carrying capacity. An effective lubricant should possess both reasonable friction modifier effect and highest load carrying capacity in mitigating boundary friction. Hence, through the study, it could be deduced that the acceptable PME dilution threshold level for SAE5W40 is up to 17.5-vol%, while for SAE10W40 is between 28.0-vol% and 34.5-vol%. PME dilution levels beyond these thresholds could easily cause lubrication film rupture under high load, high shear rate conditions during application along the mixed to boundary lubrication regimes, inducing material wear. Institution of Chemical Engineers 2017 Article PeerReviewed Hamdan, S. H. and Chong, W. W. F. and Ng, J. H. and Chong, C. T. and Rajoo, S. (2017) A study of the tribological impact of biodiesel dilution on engine lubricant properties. Process Safety and Environmental Protection, 112 . pp. 288-297. ISSN 0957-5820 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020073014&doi=10.1016%2fj.psep.2017.05.007&partnerID=40&md5=235d112047ea48135d0a432db5da85cc |
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TJ Mechanical engineering and machinery Hamdan, S. H. Chong, W. W. F. Ng, J. H. Chong, C. T. Rajoo, S. A study of the tribological impact of biodiesel dilution on engine lubricant properties |
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The switch from petro-diesel fuel to biodiesel blends for Compression Ignition engines have raised tribological performance concerns among major automobile manufacturers. Biodiesel dilution on engine lubricants could have adverse long-term effects on the engine efficiency, which will reduce the fuel economy, thus, leading to higher greenhouse gas emissions. Therefore, this study investigates the tribological impact of palm methyl ester (PME) diluted in SAE5W40 and SAE10W40 engine lubricants along different lubrication regimes under engine cold start condition. Through lubrication Stribeck curve analysis conducted using a pin-on-disc tribometer, coefficient of friction (CoF) for both engine lubricants showed parabolic maximum behaviour with increasing PME dilution. The CoF reduction beyond these peak values is attributed to the improved friction modifier effect from the now-dominant PME but with reduced load carrying capacity. An effective lubricant should possess both reasonable friction modifier effect and highest load carrying capacity in mitigating boundary friction. Hence, through the study, it could be deduced that the acceptable PME dilution threshold level for SAE5W40 is up to 17.5-vol%, while for SAE10W40 is between 28.0-vol% and 34.5-vol%. PME dilution levels beyond these thresholds could easily cause lubrication film rupture under high load, high shear rate conditions during application along the mixed to boundary lubrication regimes, inducing material wear. |
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Article |
author |
Hamdan, S. H. Chong, W. W. F. Ng, J. H. Chong, C. T. Rajoo, S. |
author_facet |
Hamdan, S. H. Chong, W. W. F. Ng, J. H. Chong, C. T. Rajoo, S. |
author_sort |
Hamdan, S. H. |
title |
A study of the tribological impact of biodiesel dilution on engine lubricant properties |
title_short |
A study of the tribological impact of biodiesel dilution on engine lubricant properties |
title_full |
A study of the tribological impact of biodiesel dilution on engine lubricant properties |
title_fullStr |
A study of the tribological impact of biodiesel dilution on engine lubricant properties |
title_full_unstemmed |
A study of the tribological impact of biodiesel dilution on engine lubricant properties |
title_sort |
study of the tribological impact of biodiesel dilution on engine lubricant properties |
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Institution of Chemical Engineers |
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2017 |
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http://eprints.utm.my/id/eprint/75704/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020073014&doi=10.1016%2fj.psep.2017.05.007&partnerID=40&md5=235d112047ea48135d0a432db5da85cc |
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