Surface Ignition and Rumble in Engines: A Literature Review

Pless, Loren G.

doi:10.4271/650391

Cited by 9 publications

(1 citation statement)

References 31 publications

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“…Previously, Japan Energy and Toyota Motors Corporation evaluated the performances of magnesium detergents in engine oil with a different combination of oil additives, and their results showed additional issue of concern with its use because of needle crystal formation and gelation [9,10]. Similar researches [11][12][13][14] have been studied to investigate the effect of additives in engine oil in an effort to reduce the PI event.…”

Section: Introductionmentioning

confidence: 99%

Studying Ignition Delay Time of Lubricant Oil Mixed with Alcohols, Water and Toluene in IQT and CVCC

Maharjan

Elbaz

Mitsudharmadi

et al. 2020

SAE Technical Paper Series

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The auto-ignition of liquid fuel and lubricant oil droplets is considered as one of the possible sources of pre-ignition. Researchers are continually finding new ways to form advanced lubricant oil by changing its composition and varying different oil additives to prevent the occurrence of this event. In this study, three sets of mixtures are prepared. The first set of mixtures was prepared by adding different alcohols namely ethanol, methanol and propanol, to the commercial lubricant oil (SAE 15W-40) in ratio of 1 -5 % by vol The second set of mixtures were prepared by mixing SAE 15W-40 with aforementioned alcohols (1 % vol.) and H2O (1 % vol.). Lastly, third set of mixtures were prepared by adding SAE 15W-40 in toluene (1 % -5% by vol.). Two experimental setups were used in the current work. An Ignition Quality Tester (IQT) was used investigate the mixtures' ignition delay time (IDT) following standard ASTM D6890 procedure, while a constant volume combustion chamber (CVCC) was used to investigate the combustion characteristics of burning of a suspended single oil droplet. For the CVCC, experiments were carried out in an ambient air environment at 300 °C with varying pressure ranging from 4 bar -22 bar at 6 bar interval pressures.IDT of lubricant oil was considered as the base IDT, which was compared to those of other mixtures. Addition of alcohols and water in lubricant oil showed a significant increase in IDT compared to other mixtures. However, the addition of toluene resulted in a decrease in IDT. Among the alcohols, methanol addition showed highest IDT compared to ethanol. However, alcohols had to be added >4 % by vol., to show a significant increase in IDT compared to pure lubricant oil.

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