Snow Traction Performance of Low Rolling Resistance Drive Tires for Class-8 Tractor Trailers U.S. EPA

Format:

Conference/Event

Author/Creator:

Bachman, Bachman, author.

Contributor:

McIntyre, James

Conference Name:

SAE 2012 Commercial Vehicle Engineering Congress (2012-10-02 : Rosemont, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Dynamic traction testing of a sample of drive tires for class 8tractor-trailers provides information about the relation amongrolling resistance, tire design, and traction performance in snowconditions. The tests were conducted to address concerns that lowrolling resistance tires used to save fuel and reduce emissions mayhave inferior traction on snow. In addition to the dynamic tractiontesting, based on ASTM F-1805, rolling resistance was tested usingISO 28580, and characteristics of the tread design were measured,including tread depth and void ratio, using ASTM F421 and ASTMF-870. In general, tires designed for increased traction, usuallymade with open shoulders, had a higher snow traction rating thantires designed for highway applications with closed shoulders.There was no significant correlation between the snow tractionrating and the coefficient of rolling resistance. Although thetires with the lowest values of rolling resistance tended to havelower snow traction ratings, many tire models with much highervalues of rolling resistance had similar low snow tractionratings.Of the tire design parameters examined, the only one to havesignificant correlation with the snow traction rating (p0.05) wasgross contact area, which was not significantly correlated with therolling resistance coefficient. Conversely, the rolling resistancecoefficient was correlated significantly (p0.05) only with averagetread depth, which was not significantly correlated with the snowtraction rating. The results of this investigation suggest thattire manufacturers use a variety of design features in thedevelopment of low rolling resistance tires, and that it ispossible to design low rolling resistance tires with superior snowtraction

Notes:

Vendor supplied data

Publisher Number:

2012-01-1918

Access Restriction:

Restricted for use by site license