Boundary friction characterisation of a used cylinder liner subject to fired engine conditions and surface deposition

Bewsher, Stephen R.; Leighton, Michael; Mohammadpour, Mahdi; Rahnejat, Homer; Offner, Günter; Knaus, Oliver

doi:10.1016/j.triboint.2018.11.005

Cited by 16 publications

(20 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From EDX analysis, it was observed that the deposits primarily consist of C, O, S, Zn and Ca. Bewsher et al 33 investigated the worn surfaces of engine liners and identified surface depositions due to combustion and found that due to high-pressure coefficients, the piston varnish erosion formed deposits on the cylinder liner.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of tribological properties and engine performance of polyol ester–based bio-lubricant: Commercial motorbike engine oil blends

Mouli

Srinivas

Vandana

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

This article explores the influence of blending polyol ester–based bio-lubricant with commercial lubricant on engine performance. Polyol esters trimethylolpropane ester and pentaerythritol ester were prepared from Calophyllum inophyllum seeds. Extreme care was taken to minimize deterioration of physicochemical properties when blending bio-lubricant with commercial oil. Blending of bio-lubricant with commercial oil was carried out in 10%, 15%, 20% and 25% volume. The test oils were first investigated for wear and friction properties on a four-ball wear tester. Optimum blending ratio was calculated from results of tribological properties, and the blend with optimum blend ratio was investigated for engine performance. The engine performance of the optimum blends was evaluated by conducting a 60-h endurance test on a motorbike. Significant improvement in tribological properties was observed up to a blending percentage of 15% when blending pentaerythritol ester with commercial oil. In the case of trimethylolpropane ester–based bio-lubricant, 10% blending with commercial oil gave optimum performance. The novel evaluation of engine performance of commercial oil and blends has shown a reduction in the wear of engine components with an encouraging decrease in fuel consumption. Metallographic studies conducted on worn piston rings reveal synergy between additives in the commercial oil and esters in the bio-lubricant in reducing wear and friction, thereby reducing fuel consumption.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Several researchers 1–33 have studied the use of bio-based lubricants for commercial applications. Use of esters obtained from trees which yield oil-bearing materials can help develop new-class lubricant formulations, thereby reducing the percentage of toxicity and improvement in eventual biodegradability of thelubricant.…”

Section: Introductionmentioning

confidence: 99%

Investigation of tribological properties and engine performance of polyol ester–based bio-lubricant: Commercial motorbike engine oil blends

Mouli

Srinivas

Vandana

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…This is a valid assumption, validated experimentally and numerically [39]. The method had been widely used in the literature and validated in different applications such as the valvetrain [35], piston liner [33,40], gears [41], and other macro-scale geometries.…”

Section: Conjunction Level Tribological Analysismentioning

confidence: 87%

“…To provide some realistic cases of an industrial application for these coatings, they are considered to be applied at the top dead centre (TDC) of a cylinder liner in an internal combustion engine for the following calculations [33]. Starvation occurs in this region, and higher boundary friction is observed owing to the lack of the formation of a lubricating fluid film.…”

Section: Conjunction Level Tribological Analysismentioning

confidence: 99%

Multiscale Numerical and Experimental Analysis of Tribological Performance of GO Coating on Steel Substrates

et al. 2019

View full text Add to dashboard Cite

Herein, nano-tribological behaviour of graphene oxide (GO) coatings is evaluated by a combination of nanoscale frictional performance and adhesion, as well as macroscale numerical modelling. A suite of characterisation techniques including atomic force microscopy (AFM) and optical interferometry are used to characterise the coatings at the asperity level. Numerical modelling is employed to consider the effectiveness of the coatings at the conjunction level. The macroscale numerical model reveals suitable deposition conditions for superior GO coatings, as confirmed by the lowest measured friction values. The proposed macroscale numerical model is developed considering both the surface shear strength of asperities of coatings obtained from AFM and the resultant morphology of the depositions obtained from surface measurements. Such a multi-scale approach, comprising numerical and experimental methods to investigate the tribological behaviour of GO tribological films has not been reported hitherto and can be applied to real-world macroscale applications such as the piston ring/cylinder liner conjunction within the modern internal combustion engine.

show abstract

“…In recent years, the development of nanoscale experimental techniques, such as surface force apparatus techniques and atomic force microscopy (AFM) have led to an improved fundamental understanding of asperity level interactions and confined fluid behaviour. The fluid cell atomic force microscopy has become an important tool for the investigation of the growth and frictional properties of surfaces, self-assembled monolayers and tribofilms [5][6][7][8][9][10][11][12]. Pidduck and Smith [5] and Leighton et al [9] showed that AFM can be used to investigate generated tribofilms, generated through use of tribometry.…”

Section: -Introductionmentioning

confidence: 99%

Asperity level frictional interactions of cylinder bore materials and lubricant composition

Forder

Umer

Morris

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Parasitic frictional losses in internal combustion engines of race vehicles adversely affect their performance. A significant proportion of these losses occur within the piston-cylinder system. This paper presents a study of the compatibility of cylinder bore surface materials with typical lubricant base constituent stock (poly alpha olefin and polyolester) as well as a fully formulated lubricant. Nanoscale boundary friction is measured using lateral force microscopy. The effect of material properties, nanoscale roughness and lubricant species upon underlying mechanisms of generated friction is presented. Advanced cylinder materials and coatings and lubricant molecular species used for high performance engines are investigated, and an integrated approach not hitherto reported in literature.

show abstract

Boundary friction characterisation of a used cylinder liner subject to fired engine conditions and surface deposition

Cited by 16 publications

References 23 publications

Investigation of tribological properties and engine performance of polyol ester–based bio-lubricant: Commercial motorbike engine oil blends

Investigation of tribological properties and engine performance of polyol ester–based bio-lubricant: Commercial motorbike engine oil blends

Multiscale Numerical and Experimental Analysis of Tribological Performance of GO Coating on Steel Substrates

Asperity level frictional interactions of cylinder bore materials and lubricant composition

Contact Info

Product

Resources

About