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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Laboratory Alignment Procedure for Improving Reproducibility of Tyre Wet Grip Measurement

1
Korea Automotive Technology Institute, 303 Pungse-ro,Pungse-myeon, Dongnam-gu, Cheonan City, Chungnam 330-912, Republic of Korea
2
Korea Energy Management Corporation, Yongin City, Gyeonggi, 448-994, Republic of Korea
*
Author to whom correspondence should be addressed.
World Electr. Veh. J. 2015, 7(3), 414-419; https://doi.org/10.3390/wevj7030414
Published: 25 September 2015
PDF [843 KB, uploaded 18 May 2018]

Abstract

Korea and EU governments are running the tyrelabelling system from 2012.All tyres sold in Korea have to carry a label displaying information about two performancecriteriasuch as rolling resistance and wet grip.The rolling resistance of tyres determines their fuel efficiency gradingand the wet grip of tyres determines their braking safety grading. Measurement of rolling resistance and wet gripmust be reproducible; tests on the same tyres in different laboratories must produce the same results in order to ensure a fair comparison between tyres from different suppliers. In addition, a good reproducibility of testing results prevents market surveillance authorities from obtaining different results from those of the suppliers when testing the same tyres. The laboratory alignment procedure of rolling resistance was developed and published as an EU Commission Regulation No. 1235 in 2011. But the laboratory alignment procedure of wet grip has not developed yet. So there are a lot of differences of wet grip test results among the test laboratories in the world. The proposed new procedure for the alignment of test laboratories with regard to the measurement of tyre wet gripcanimprove the reproducibility of the wet grip testing results. The proposed wet grip laboratory alignment procedure wasverified through five laboratory alignment tests between KATECH and five test laboratoriesin the world.
Keywords: WG(Wet Grip); tyre labelling system; laboratory alignment procedure; reproducibility; BFC (Braking Force Coefficient) WG(Wet Grip); tyre labelling system; laboratory alignment procedure; reproducibility; BFC (Braking Force Coefficient)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Jeon, K.; Yoo, Y.; Lee, J.; Jung, D.; Lim, S.; Park, S. Laboratory Alignment Procedure for Improving Reproducibility of Tyre Wet Grip Measurement. World Electr. Veh. J. 2015, 7, 414-419.

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