Introduction to surface topography.- The areal field parameters.- The areal feature parameters.- Areal filtering methods.- Areal form removal.- Areal fractal methods.- Choosing the appropriate parameter.- Characterization of individual areal features.- Multi-scale signature of surface topography.- Correlation of areal surface texture parameters to solar cell efficiency.- Characterisation of cylinder liner honing textures for production control.- Characterization of the mechanical bond strength for copper on glass plating applications.- Inspection of laser structured cams and conrods.- Road surfaces.

Characterisation of Areal Surface Texture

Correlation between standard roughness parameters skewness and kurtosis and tribological behaviour of contact surfaces

Micro-dimpled surface by ultrasonic nanocrystal surface modification and its tribological effects

Improving tribological behaviour of piston ring–cylinder liner frictional pair by liner surface texturing

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Quantitative characterization of micro-topography a bibliography of industrial surface metrology

The effect of cylinder liner surface topography on abrasive wear of piston–cylinder assembly in combustion engine

Reciprocating piston engines are the major propulsion devices for light aircrafts, helicopters, and essentially all automotive vehicles. They are expected to fulfil both present-day and future demands for engine performance, durability, fuel economy, and exhaust emissions legislation. One of the key factors related to these demands is the need to the limit thermomechanical internal losses, wear, and lubricating oil consumption, which are in turn conditioned by the tribological behavior of the piston–cylinder assembly. Consequently, this latter system requires a multi-directional approach in terms of manufacturing. Apart from various modifying techniques (e.g. laser texturing), a conventional plateau-honing operation is still the standard technology for shaping cylinder liner surface microstructure. This paper describes the distinctions between variations in the performance of the engines in relation to cylinder liner roughness parameters due to different honing settings. Five air-cooled reciprocating aircraft engines (FRANKLIN 4A-235-B31) served as the objects of research. The engines passed durability tests on the dynamometer bed, including operation under artificially intensified wear conditions. The results show a significant impact of the brand-new honed cylinder liner surface microstructure on the engine output parameters. Detailed study proves that some of the cylinder liner roughness parameters, specifically, the slope of the root mean square line (RMS) for valley roughness Rvq and the linear triangle area for valleys A2, are strongly correlated with the engine operational properties. Higher values of Rvq and A2 are associated with an improvement in engine performance but result in a deterioration in the exhaust harmful emission.

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Effect of Initial Cylinder Liner Honing Surface Roughness on Aircraft Piston Engine Performances

An experimental study of diesel engine cam and follower wear with particular reference to the properties of the materials

A review of the existing methods describing the cylinder bore surface roughness was presented. An analysis of the surfaces of a large number of honed cylinders was performed. The relationship between conventional and proposed roughness parameters was studied using the principal components method as well as correlation and regression analysis. It follows from the analysis that one can fairly precisely describe a cylinder surface roughness profile using the following parameters: the emptiness coefficient R p / R t , the normalized rough core depth R k / R t , one of the height parameters ( R tm or R 3y are proposed) and the mean distance among deep valleys. A wider description includes also the real oil capacity and one of the horizontal parameters.

Jacek Michalski

Papers

The effect of cylinder liner surface topography on abrasive wear of piston–cylinder assembly in combustion engine

Effect of Initial Cylinder Liner Honing Surface Roughness on Aircraft Piston Engine Performances

An experimental study of diesel engine cam and follower wear with particular reference to the properties of the materials

Description of honed cylinders surface topography

Simulation of cylinder ‘zero-wear’ process