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Quantification of Blechmantel Effect on Wear of Cylinder Bore Microtopography
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.ORCID iD: 0000-0003-3149-4296
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.ORCID iD: 0000-0001-8058-1252
Volvo Power Train Corp., Volvo Group, Göteborg, Sweden.
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2008 (English)In: Proceedings of the 13th Nordic Symposium on Tribology, Nordtrib 2008, Tampere: Tampere University Press, 2008, p. 13-Conference paper, Published paper (Refereed)
Abstract [en]

The presence of cold work material (blechmantel) smeared out on cylinder liners by faulty honing is undesirable as it seals the oil-bearing honing grooves. It is also believed to correlate with increased bore wear, presumably due to its loosening and together with the carbon build-up from the piston’s top land form an increased quantity of abrasive particles. An attempt has been made to estimate the extent of removal of blechmantel for different wear regimes present at the middle and top region (near the top dead centre) of the liner surface using the unworn bottom region as a reference for comparison. A number of truck cylinder liners were axially sectioned after varying periods of engine running under similar conditions of load, engine speed and lubrication. 3D surface measurements were taken at the three regions and a range of standard parameters was extracted. Combining the profile and image analysis, an algorithm was developed to identify and quantify the blechmantel covering the grooves that is most likely to break and act as abrasive wear particles and at the same time it represents the part of blechmantel which covers the most of the surface. It was found out that a mere portion of the blechmantel from the middle and bottom section was removed, while the blechmantel from the top section was greatly removed and thereby it represents one of the possible causes for wear. Axial wear scratches more emphasized on the thrust side of the liner were observed not only through the whole stroke area, but also in the bottom region. The fact that the most of the blechmantel is not removed from the running surface of the liner (except for the very small portion of the polished areas at the dead centres), points out that the blechmantel plays only a minor role on wear of the cylinder liner surfaces.

Place, publisher, year, edition, pages
Tampere: Tampere University Press, 2008. p. 13-
Keywords [en]
Blechmantel, Quantification, Cylinder Liner Wear, Surface Topography
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:hh:diva-2148Local ID: 2082/2543ISBN: 978-952-15-1961-1 OAI: oai:DiVA.org:hh-2148DiVA, id: diva2:239366
Conference
13th Nordic Symposium on Tribology, Nordtrib 2008, Tampere, Finland, 10-13 June 2008
Available from: 2008-11-18 Created: 2008-11-18 Last updated: 2018-03-23Bibliographically approved
In thesis
1. On Surface Topography of Cylinder Liners
Open this publication in new window or tab >>On Surface Topography of Cylinder Liners
2008 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The frictional losses, oil consumption and emissions in internal combustion engines are in great extent controlled by the cylinder liner surface topography. This emphasises the importance of: investigating the liner’s topography by objectively characterising it, investigating its effects on the tribological function to gain a better understanding and improving its manufacturing. As a first attempt in this study to objectively characterise the liner surface, a traditional combination of Scanning Electron Microscope (SEM) images and roughness profiles was used. The groove and image parameters characteristic for liner topographies were extracted by applying specially developed algorithms and together with the standard parameters served to study wear on liners of diesel and petrol engines. An experiment was designed to improve the liners’ manufacturing by varying of the honing process parameters and oil flow simulations were run to study the influence of the characteristics of the manufactured surfaces on their function. The results suggested that reducing the base honing pressure and increasing the plateau honing time gave the best surface with smoother plateaux, summits of higher density and milder slopes, more but smaller islands and shallower valleys. The potentials of fast acquiring and containing 3D data of the interference measurements were utilised to overcome the encountered problems in the usage of the combination of profile and SEM measurements and to enable automatic quality control of the cylinder liner surfaces. In the efforts to examine the influence of the surface properties on liner’s function, the extent of blechmantel (cold work material) removal was estimated from 3D measurements of run liners in engine tests. For characterising this feature, algorithms were developed and implemented and it was found that the most of the blechmantel is still left on the liner pointing that it plays a minor role on wear.

Place, publisher, year, edition, pages
Göteborg: Chalmers University of Technology, 2008. p. 64
Series
Report / Department of Materials and Manufacturing Technology, Chalmers University of Technology, ISSN 1652-8891 ; 37
Keywords
Cylinder liner, Surface Roughness, Characterisation, Honing, Wear, Blechmantel, Groove Parameters, Quality Control, Flow Simulation
National Category
Manufacturing, Surface and Joining Technology
Identifiers
urn:nbn:se:hh:diva-14648 (URN)
Presentation
Delta-Gamma, Hörsalsvägen 7 Chalmers, Göteborg
Opponent
Available from: 2011-03-28 Created: 2011-03-25 Last updated: 2014-03-05Bibliographically approved

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Dimkovski, ZlateAnderberg, CeciliaRosén, Bengt-Göran

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