Prediction of fuel economy performance of engine lubricants based on laboratory bench tests

Maroto-Centeno, José Alberto; Pérez-Gutiérrez, T.; Fernández-Ruíz-Morón, Luis; Quesada‐Pérez, Manuel

doi:10.1016/j.triboint.2015.07.041

Cited by 11 publications

(8 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Формально режим трения в диапазоне контактных давлений P 2 …P 3 может быть назван граничным или переходным режимом. Трение в режиме граничной смазки исследовано в большом количестве работ [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. В большинстве случаев граничная смазка рассматривается применительно к контактам поршневых колец с гильзой цилиндра.…”

Section: Discussionunclassified

Anti-wear additives influence upon hydrodynamic friction mode parameters in bearings of internal-combustion engines

Задорожная¹,

Zadorozhnaya²,

Mukhortov³

et al. 2016

Bulletin of Bryansk State Technical University

View full text Add to dashboard Cite

An essential condition to ensure an engine life having 300,000 – 1 000,000 km according to race consists in assurance of a minimum wear rate of crankshaft bearings. For such units as connectingrod bearings a maximum allowable value of bearing brass wear makes 100 mkm which corresponds to an integral linear wear intensity of 10-14 …10-13 that is possible only at a hydrodynamic mode of friction actually at all modes of engines operations. Ensuring liquid friction in all range of contact pressures is achieved both through design methods, and technological ones. To the latter belongs first of all the application of lubricants with high wearresistant properties. In this connection arises a problem to reveal a mechanism and degree of the effect of lubricant components upon a range of contact pressure where liquid friction is realized. This paper reports the experimental evidences of the increase of contact pressures at which is achieved a minimum value of a constant of friction at the introduction in lubricant a standard wear-resistant additive – dialkyldithiophosphate of zinc (ZDDP). So, at the introduction in coal oil without additives I-20A (viscosity type ISO 32) 1.25 and 2.5% ZGGP maxi-mum contact pressure at which is realized a hydrody-namic mode of friction increases by 1.8 and 2 times accordingly. Because of impossibility to explain experimental data by a chemical interaction of ZDDP with surface material of tribo-coupling there is offered and substantiated a mechanism of ZDDP influence upon rheological parameters of lubricant in a separation layer. A rheological model allowing the computation of the wearresistant additives influence upon a value of hydrodynamic pressures in a lubrication layer is of-fered. The idea of the initiation by a wearresistant additive of multimolecular adsorption of lubricant on the surface of tribocoupling may be used for the optimization of ZDDP structure and also for the prognostication of changes in pressure coefficient of viscosity in a lubrication layer.

show abstract

Section: Discussionunclassified

Anti-wear additives influence upon hydrodynamic friction mode parameters in bearings of internal-combustion engines

Задорожная¹,

Zadorozhnaya²,

Mukhortov³

et al. 2016

Bulletin of Bryansk State Technical University

View full text Add to dashboard Cite

show abstract

“…Recent environmental issues across the world have highlighted the importance of improving automobile fuel efficiency [1][2][3][4][5][6]. The use of lower viscosity oils to reduce fluid resistance under hydrodynamic lubrication is one way to improve fuel efficiency in automotive engines [4].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Enhancement of the Lubrication Performance of Zinc Dialkyldithiophosphate by Coexistence with Ionic Liquid

et al. 2021

View full text Add to dashboard Cite

Ionic liquids (ILs) are being considered as novel lubricant additives to improve the friction and anti-wear characteristics of sliding surfaces. Because ILs consist of only cations and anions, their physical and chemical properties can be easily tailored by modifying their combination. These features enable to design of specific ILs for a given tribological system. However, there are few reports on the effect of ILs used as lubricant additives on the friction and anti-wear characteristics of sliding surfaces. Moreover, it is necessary to investigate the synergism between ILs and other lubricant additives to achieve high practical efficiency. Therefore, in this study, two ILs with different cations but similar anions were used in combination with an anti-wear additive, zinc dialkyldithiophosphate (ZDDP), and the resultant wear and friction characteristics of the worn surfaces were analyzed. We found that the tribological performance under steel/ steel sliding conditions was dependent on the chemical composition of the ILs. In addition, mixed ZDDP and IL solutions exhibited lower friction and wear when compared to ZDDP alone. It is considered that the excellent lubrication and frictional performance observed with the mixed lubricant solutions is due to the formation of tribofilms comprising of ZDDP and IL on the sliding surface.

show abstract

“…studied the effects of the three main drivers of an engine fuel consumption reduction potential: the HTHS viscosity η H T HS , the boundary friction coefficient µ D and the EHL friction coefficient µ EH L . They found that the parameter with more incidence over later fuel economy improvement values on a CEC L-54-96 test was the HTHS viscosity [52]. Figure 2.21 presents the correlation claimed by the authors.…”

Section: Figure 220: Fuel Economy Improvements On Volvo D12d Test Fomentioning

confidence: 80%

“…Contact Regime 45 (45)(46)(47)(48)(49)(50)(51)(52)(53)(54)(55) Piston Assembly Several 30 Bearings Hydrodynamic 15 (7)(8)(9)(10)(11)(12)(13)(14)(15) Valvetrain Mixed 10…”

Section: Friction [%]mentioning

confidence: 99%

“…In order to complete the engine and fleet tests, two tribometers were used to mimic certain ICE tribocontacts; the Cameron Plint Machine TE77 reciprocating rig, widely used to reproduce the piston ring/cylinder liner contact [47][48][49][50][51][52][53][54][55] and the WAM Ball-onDisc machine, which is normally used to reproduce valvetrain and transmission gears tribocontacts [56][57][58][59][60] were used alongside some of the engine oils used in the fleet test.…”

Section: Tribometers Laboratory Tests and Equipmentmentioning

confidence: 99%

See 1 more Smart Citation

Contribution to the Assessment of the Potential of Low Viscosity Engine Oils to Reduce ICE Fuel Consumption and CO2 Emissions

Roa¹,

Andrés²

View full text Add to dashboard Cite

ResumenActualmente la industria de la automoción vive uno de los periodos de cambio más vertiginosos de las últimas décadas, marcado por un creciente interés en reducir los impactos medioambientales negativos generados por el consumo de combustibles fósiles y sus consecuentes emisiones nocivas de dioxido de carbono (CO 2 ) generados durante el funcionamiento del motor de combustión interna alternativo (MCIA).Teniendo en cuenta que el proceso de sustitución de la flota actual por una totalmente independiente de los combustibles fósiles puede tomar varias décadas, y ante la urgencia inmediata de reducir las emisiones de CO 2 , se puede decir que actualmente es más urgente hacer una optimización de los vehículos con motorizaciones convencionales. Entre las soluciones técnicas que se han desarrollado para mejorar la eficiencia del MCIA destaca la utilización de aceites de baja viscosidad como un método efectivo y de bajo coste de implementación que brinda reducciones del consumo entre el 0.5% y el 5%.Durante el desarrollo de esta tesis se ha llevado a cabo un plan de ensayos enfocado en determinar valores concretos de ahorro de combustible esperados cuando se utilizan aceites de baja viscosidad en vehículos de trabajo ligero y pesado. El plan de estudios se dividió en tres partes; la primera se centró en el estudio de MCIA de vehículos de trabajo ligero, utilizando un motor Diesel representativo del mercado Europeo y llevando a cabo pruebas comparativas en arrastre, puntos de funcionamiento estacionarios y ciclos transitorios de homologación. La segunda parte del estudio consta de otro ensayo comparativo, esta vez utilizando una flota de vehículos de trabajo pesado. El estudio se realizó con la flota de autobuses urbanos de la ciudad de Valencia, incluyéndose 3 modelos de autobuses, con 2 tipos de motorización diferente. La tercera parte del estudio se centró en el comportamiento del coeficiente de friction en los pares tribológicos del motor haciendo ensayos comparativos con tribómetros especializados; uno de movimiento alternativo para simular las condiciones de la interfaz piston-camisa y un "bola y disco" para simular la lubricación en el sistema de distribución, específicamente en la interfaz leva-taqué.Los diversos estudios comparativos han servido para analizar como es la respuesta general de la fricción y el consumo de combustible cuando se usan aceites de baja viscosidad, tanto a nivel de motor como para la totalidad del vehículo, encontrando diferencias de par en los ensayos de arrastre, de consumo específico de combustible en los ensayos de motor en estado estacionario y diferencias totales de consumo de combustible en los ensayos en régimen transitorio y en flota, que a su vez han permitido estimar la reducción esperada en la huella de carbono.October 6, 2016 ResumActualment la indústria de l'automoció viu un dels períodes de canvi més vertiginoses de les últimes dècades, marcat per un creixent interès en reduir els impactes mediambientals negatius generats pel consum de combustibles fòssils i els seus c...

show abstract

Prediction of fuel economy performance of engine lubricants based on laboratory bench tests

Cited by 11 publications

References 8 publications

Anti-wear additives influence upon hydrodynamic friction mode parameters in bearings of internal-combustion engines

Anti-wear additives influence upon hydrodynamic friction mode parameters in bearings of internal-combustion engines

Synergistic Enhancement of the Lubrication Performance of Zinc Dialkyldithiophosphate by Coexistence with Ionic Liquid

Contribution to the Assessment of the Potential of Low Viscosity Engine Oils to Reduce ICE Fuel Consumption and CO2 Emissions

Contact Info

Product

Resources

About