REDUCTION OF PISTON SKIRT FRICTION USING THE MICRO-SCALE PATTERNED SURFACE
- Authors
- Kang, Jongdae; Yi, Jonghun; Kim, Dong Rip; Park, Sungwook
- Issue Date
- Feb-2023
- Publisher
- 한국자동차공학회
- Keywords
- Microscale patterning; Surface structure; Low friction; Engine friction; Piston skirt
- Citation
- International Journal of Automotive Technology, v.24, no.1, pp.15 - 22
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- International Journal of Automotive Technology
- Volume
- 24
- Number
- 1
- Start Page
- 15
- End Page
- 22
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/191642
- DOI
- 10.1007/s12239-023-0002-0
- ISSN
- 1229-9138
- Abstract
- The purpose of this study is to determine whether piston friction can be reduced by applying a micro-pattern to the skirt portion of the piston, which accounts for the largest proportion of engine parts. The roughness of the ready-made pistons was reduced before etching the micro-scale pattern onto the piston skirt. The micro-patterns were screen-printed on the piston skirt, and kept uniform through etching. The friction reduction effect of the piston was confirmed through an engine experiment using a 1.6 L four-cylinder gasoline engine to remove parts. A hexagonal shape that is representative of bionic textures was selected for the micro-pattern, and circular and cross-hatch patterns were additionally produced for comparison. The friction experiments with the patterning pistons confirmed that friction was reduced by up to 6.74 % by adjusting the spacing of the hexagonal pattern. It was also confirmed that friction was reduced in the cross-hatch pattern by up to 5.28 %. The friction reduction effect may vary depending on the parameters used for a specific pattern.
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