scholarly journals Effect of gasoline–bioethanol blends on the properties and lubrication characteristics of commercial engine oil

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15005-15019 ◽  
Author(s):  
L. S. Khuong ◽  
H. H. Masjuki ◽  
N. W. M. Zulkifli ◽  
E. Niza Mohamad ◽  
M. A. Kalam ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Engine Oil ◽  
Oil Degradation ◽  
Lubrication Characteristics ◽  
Engine Components

The increasing use of bioethanol causes tribological effects on engine components. It is crucial to study the effect of bioethanol on oil degradation and friction and wear behaviors of engine oil, using four-ball wear tester.

scholarly journals Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 732
Author(s):  
Yeoh Jun Jie Jason ◽  
Heoy Geok How ◽  
Yew Heng Teoh ◽  
Farooq Sher ◽  
Hun Guan Chuah ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Graphene Nanoplatelets ◽  
Friction Reduction ◽  
Engine Oil ◽  
Protective Film ◽  
Tribological Behaviour ◽  
Wear Reduction ◽  
Pongamia Oil ◽  
Interacting Surfaces ◽  
Worn Surface

This study investigated the tribological behaviour of Pongamia oil (PO) and 15W–40 mineral engine oil (MO) with and without the addition of graphene nanoplatelets (GNPs). The friction and wear characteristics were evaluated in four-ball anti-wear tests according to the ASTM D4172 standard. The morphology of worn surfaces and the lubrication mechanism of GNPs were investigated via SEM and EDS. This study also focuses on the tribological effect of GNP concentration at various concentrations. The addition of 0.05 wt % GNPs in PO and MO exhibits the lowest friction and wear with 17.5% and 12.24% friction reduction, respectively, and 11.96% and 5.14% wear reduction, respectively. Through SEM and EDS surface analysis, the surface enhancement on the worn surface by the polishing effect of GNPs was confirmed. The deposition of GNPs on the friction surface and the formation of a protective film prevent the interacting surfaces from rubbing, resulting in friction and wear reduction.

Comparison of engine oil degradation observed in laboratory alteration and in the engine by chemometric data evaluation

2013 ◽  
Vol 65 ◽  
pp. 37-47 ◽  
Author(s):  
Charlotte Besser ◽  
Nicole Dörr ◽  
Franz Novotny-Farkas ◽  
Kurt Varmuza ◽  
Günter Allmaier
Keyword(s):  
Data Evaluation ◽  
Engine Oil ◽  
Oil Degradation

scholarly journals Engine Oil Degradation Induced by Biodiesel: Effect of Methyl Oleate on the Performance of Zinc Dialkyldithiophosphate

ACS Omega ◽  
2019 ◽  
Vol 4 (14) ◽  
pp. 16166-16170 ◽  
Author(s):  
Jiu Wang ◽  
Tianxi He ◽  
Chunyu Song ◽  
Xiaoqing Li ◽  
Boshui Chen
Keyword(s):  
Methyl Oleate ◽  
Engine Oil ◽  
Oil Degradation ◽  
Zinc Dialkyldithiophosphate

Physicochemical properties and tribological performance of motorbike lubricant dispersed with surface-modified WS2 nanoparticles

2019 ◽  
Vol 233 (9) ◽  
pp. 1379-1388 ◽  
Author(s):  
V Srinivas ◽  
RN Thakur ◽  
AK Jain ◽  
M Saratchandra Babu
Keyword(s):  
Physicochemical Properties ◽  
Fuel Consumption ◽  
Viscosity Index ◽  
Tribological Performance ◽  
Engine Oil ◽  
Engine Wear ◽  
Endurance Tests ◽  
The Stability ◽  
Surface Modified ◽  
Engine Components

This paper investigates the effect of dispersion of surface-modified WS2 nanoparticles on the tribological performance and physicochemical properties of motorbike lubricant. Surface-assisted WS2 nanoparticles were dispersed in motorbike engine oil and an optimum amount of surfactant for best stability of the lubricant suspension was found by investigating the changes in the physicochemical properties of lubricant. The stability analysis using light scattering techniques confirmed the stability of nanoparticles dispersed in lubricant medium and surface-modified WS2 nanoparticles remained stable for 180 days. The physicochemical properties were evaluated as per ASTM standards over a period of two months to check the state of lubricant and observable changes in the properties during this period. The tribological performance of the lubricants was assessed by conducting endurance tests on a 100 cc motor bike. The performance was evaluated by checking the wear of the engine components and fuel consumption. It was found that there were no abnormal changes in the physicochemical properties of lubricant up to a certain surfactant to nanoparticle ratio indicating its utility in automotive engines. However, if the amount of surfactant was increased beyond optimum quantity abnormal changes are seen in the viscosity index, leading to the deterioration of key lubricant properties. Lubricant dispersed with WS2 nanoparticles gave good performance characterized by the reduction in both engine wear and fuel consumption. Worn surfaces of the oil rings after the endurance test were assessed for deposits and it was found that a layer of WS2 deposited on the oil ring surface that reduced friction and wear.

Lubricant Degradation Studies Using a Single Cylinder Research Engine

2005 ◽  
Author(s):  
P. M. Lee ◽  
M. Priest ◽  
M. S. Stark ◽  
J. J. Wilkinson ◽  
J. R. Lindsay Smith ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Tribological Performance ◽  
Operating Conditions ◽  
Engine Oil ◽  
Oil Degradation ◽  
Lubricant Degradation ◽  
Reduce Fuel Consumption ◽  
Single Cylinder ◽  
Degradation Studies ◽  
Piston Assembly

With increasing pressure on engine oil manufacturers to extend oil drain intervals and reduce fuel consumption, whilst changing the composition of fully formulated oils to meet new CEC, ILSAC and OEM specifications, there is ever increasing need to understand the effect of oil degradation on the operating conditions and tribological performance of engines. This poster presents mechanical changes made to a single cylinder research engine to enable the study of lubricant degradation, its transport and how this links to piston assembly tribology. A summary of the research undertaken using these changes and a sample of results obtained to date are also presented.

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