Assessment of 3D Parameters for the Characterisation of Cylinder Treads

Pehnelt, Sebastian; Dollinger, Peter; Seewig, Jörg

doi:10.1007/s38313-013-0040-5

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…1 has also a protuberance (the white region closer to the center) that would escape from most of the profile measurements. As a consequence of the aforementioned issues, non-contact optical measurement techniques are becoming usual during the development and analysis of engine cylinder bores [17]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Effect of waviness and roughness on cylinder liner friction

Tomanik

Mansori

Souza

et al. 2018

Tribology International

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The tribological performance of piston ring-cylinder bore was investigated through deterministic mixedlubrication modeling. Bore topographies measured from regular honed Gray Cast Iron (GCI) to "Mirror-Like" coated bore surfaces were used in the investigation. In contrast with typical honed GCI bores composed of relatively well-distributed peaks and valleys, coated bores are composed of a much smoother plateau and localized deep pores. Simulation results indicated that coated bore surfaces generate significantly higher hydrodynamic pressure and lower asperity contacts when compared with regular GCI topographies. The influence of roughness filtering and the associated cutoffs values were also considered in the analysis, showing that the choice of cutoff affects both the predicted hydrodynamic and asperity contact pressures. Furthermore, the simulation results also revealed that most of the fluid pressure was generated by the honing grooves rather than by the localized pores present on coated bore surfaces.

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Section: Introductionmentioning

confidence: 99%

Effect of waviness and roughness on cylinder liner friction

Tomanik

Mansori

Souza

et al. 2018

Tribology International

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“…Due to the detrimental effects of folded metal, the automotive industry has, for decades, selected visual or destructive methods to quantify folded metal on cylinder liners [1,5]. With the advance of measurement equipment and computational numerical analysis, more sophisticated and quantitative methods to characterize cylinder bore topographies have been introduced [6,7,8,9,10,11]. Some commercial software incorporate their own routines for quantifying new 3D parameters for honed surfaces, but the lack of standards still hampers the comparison between different methods.…”

Section: Introductionmentioning

confidence: 99%

Folded Metal and Other Surface Parameters on Combustion Engine Cylinders

Obara

Tomanik

Souza

2014

SAE Technical Paper Series

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In the last years, sophisticated analyses and control of topography parameters have been introduced to study engine bore cylinders. Such surface characteristics have impact on friction and wear of the engine, with effects on fuel consumption and durability. Among such characteristics, folded metal blocking the honing grooves has received much attention, but its quantification and actual impact on engine performance is still under discussion, both in the academia and in the industry. In this work, a methodology was developed to mathematically quantify the folded metal present in engine bores. The method is compared to others described in the literature and in use by some European automotive manufacturers. The quantification method, based on topography measurements, was also compared with other analyses, such as optical and scanning electron microscopy. The necessary resolution of the topography measurement and some recommendations for the analysis are given. This work also discusses some limitations of the method, for example, when applied on non-usual bore honing, coated bores or nanolayered bores.

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Assessment of 3D Parameters for the Characterisation of Cylinder Treads

Cited by 2 publications

References 6 publications

Effect of waviness and roughness on cylinder liner friction

Effect of waviness and roughness on cylinder liner friction

Folded Metal and Other Surface Parameters on Combustion Engine Cylinders

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