Automobile engine tribology — approaching the surface

Priest, Martin; Taylor, C. M.

doi:10.1016/s0043-1648(00)00375-6

Cited by 347 publications

(204 citation statements)

References 26 publications

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“…On the one hand, these circumstances demand a continuous further development of the tribological partners shaft and journal bearing material as well as the lubricant by experimental investigations [2][3][4][5][6][7][8][9]. On the other hand, the prediction of wear based on numerical investigations becomes increasingly important especially in the course of the design process and the evaluation of life expectancy [10,11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Wear Phenomena of Journal Bearings by Close to Component Testing and Application of a Numerical Wear Assessment

et al. 2018

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Hydrodynamic journal bearings are subjected to progressively rough loading conditions leading to an increased share of operation in mixed and boundary lubrication. This results in increased frictional losses, additional wear and a higher chance of failure, which calls for the understanding of wear processes and the necessity of a numerical assessment. We conducted wear investigations of journal bearings by making use of a close-to-component test setting, and the progress of wear could be linked to the introduced frictional energy and in combination with a comprehensive surface analysis tribological effects could be resolved in detail. Achieved wear coefficients were implemented in a novelly developed numerical framework, which allows for the dynamic numerical evaluation of operation in the fluid and mixed lubrication regime and simultaneously occurring wear processes. By comparing numerical and experimental results, we evaluated the numerical framework's capability to conduct holistic simulations including aspects like dynamically changing operation conditions, fluid and mixed lubrication as well as wear.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Wear Phenomena of Journal Bearings by Close to Component Testing and Application of a Numerical Wear Assessment

et al. 2018

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“…Engine components such as piston rings, piston pins, cam followers, cam shafts, rockers, gears and tappets are often coated with DLC and involve interfacial contacts with either steel or DLC coated surfaces in the presence of lubricant (formulated engine oil). But it is quite challenging to use DLC on the components, which are operated at high temperature and pressure conditions and at high sliding velocity (such as piston-cylinder and valve-train assembly, where maximum operating temperature typically is in the range of 300°C and 150°C respectively [1]). …”

Section: Introductionmentioning

confidence: 99%

Friction and wear behaviour of Mo–W doped carbon-based coating during boundary lubricated sliding

Hovsepian

Mandal

Ehiasarian

et al. 2016

Applied Surface Science

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A molybdenum and tungsten doped carbon-based coating (Mo−W−C) was developed in order to provide low friction in boundary lubricated sliding condition at ambient and at high temperature. The Mo−W−C coating showed the lowest friction coefficient among a number of commercially available state-of-the-art DLC coatings at ambient temperature. At elevated temperature (200°C), Mo−W−C coating showed a significant reduction in friction coefficient with sliding distance in contrast to DLC coatings. Raman spectroscopy revealed the importance of combined Mo and W doping for achieving low friction at both ambient and high temperature. The significant decrease in friction and wear rate was attributed to the presence of graphitic carbon debris (from coating) and 'in-situ' formed metal sulphides (WS 2 and MoS 2 , where metals were supplied from coating and sulphur from engine oil) in the transfer layer.

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“…(4) as described by [20] using the surface roughness values: Figure 4 shows the calculated oil retention volume for each of the samples in comparison with plateau honed surface. Conventional plateau honing would produce a surface with an oil retention volume of 0.83 μm3/μm2.…”

Section: Resultsmentioning

confidence: 99%

Methods of preparing internal combustion engine cylinder bore surfaces for frictional improvement

et al. 2016

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Abstract.Frictional losses piston to cylinder bore contact is a major sources of mechanical losses in an internal combustion engine (ICE). Traditional plateau honing produces a relatively rough cylinder bore surface with many valleys for oil retention and plateau surfaces that are usually has micro roughness's that causes mechanical friction to act as a bearing surface. A smooth polished dimpled surface is more ideal to achieve low friction and wear in an ICE. Alternative methods to create a smooth dimpled surface on a hypereutectic aluminum ADC12 substrate for frictional improvements are evaluated in this study using an oscillating wear tester (OWT). The methods include casting in the dimples in the aluminum matrix, sandblasting as well as embossing the pits. The texture samples are evaluated by examining the surface properties, measuring frictional coefficient as well as wear characteristics. It was found that the samples embossed with #320 grit sandpaper and sandblasted with #240 sieve sand samples had a reduced coefficient of friction (μ) of 23% at low sliding speeds before hydrodynamic lubrication mode and 6.9% in the fully hydrodynamic lubrication region.

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Automobile engine tribology — approaching the surface

Cited by 347 publications

References 26 publications

Evaluation of Wear Phenomena of Journal Bearings by Close to Component Testing and Application of a Numerical Wear Assessment

Evaluation of Wear Phenomena of Journal Bearings by Close to Component Testing and Application of a Numerical Wear Assessment

Friction and wear behaviour of Mo–W doped carbon-based coating during boundary lubricated sliding

Methods of preparing internal combustion engine cylinder bore surfaces for frictional improvement

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