Methods of Preparing Internal Combustion Engine Cylinder Bore Surfaces for Frictional Improvement

Kong, Chung Hwa and D., Ramasamy and K., Kadirgama and M. M., Noor and M. M., Rahman and Samykano, Mahendran (2017) Methods of Preparing Internal Combustion Engine Cylinder Bore Surfaces for Frictional Improvement. In: MATEC Web of Conferences: The 2nd International Conference on Automotive Innovation and Green Vehicle (AiGEV 2016), 2-3 August 2016 , Malaysia Automotive Institute, Cyberjaya, Selangor. pp. 1-11., 90 (01055 ). ISSN 2261-236X

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Frictional losses between the piston rings to cylinder bore surface is one of the 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 using a gritted roller. 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 #480 grit sandpaper and sandblasted with #240 sieve sand samples had the more desired properties with 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. Although samples cast with added graphite powder had much lower friction, it had insufficient oil retention volume and resistance against catastrophic wear.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: Internal combustion engine (ICE); frictional; improvement;
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Centre of Excellence: Automotive Engineering Centre
Centre of Excellence: Automotive Engineering Centre

Faculty of Mechanical Engineering
Depositing User: Dr Devarajan Ramasamy
Date Deposited: 31 Oct 2017 00:57
Last Modified: 26 Dec 2017 02:05
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