| EFFECT OF AMBIENT AND TYRE TEMPERATURE ON TRUCK TYRE
ROLLING RESISTANCE |
| Jukka Hyttinen 1,2, Matthias Ussner 1, Rickard Österlöf 1, Jenny Jerrelind 2, Lars Drugge 2 |
1Scania CV AB
2ECO2 Vehicle Design, Engineering Mechanics, KTH Royal Institute of Technology |
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| ABSTRACT |
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Rolling resistance is consuming a large portion of the generated powertrain torque and thus have a substantial
effect on truck energy consumption and greenhouse gas emissions. EU labelling of tyres mandates the manufacturers to
measure rolling resistance at +25 °C ambient temperature after stabilised rolling resistance has been established. This is a
convenient way of comparing rolling resistance but disregards aspects such as transient rolling resistance and influence of the
ambient temperature. For many purposes, such as dimensioning batteries for electric vehicles, this value is not representative
enough to give a good understanding of the rolling resistance. In this article, the rolling resistance of a truck tyre was
measured at different ambient temperatures (-30 to +25 °C) in a climate wind tunnel and a considerable tyre and ambient
temperature dependency on rolling resistance was found. The investigation shows that the temperature inside the tyre
shoulder has a good correlation with rolling resistance. Measurements with spraying water on tyres were conducted showing
a considerable increase in rolling resistance due to higher cooling effect. Driving range simulations of a long haulage
battery-electric truck have been conducted with temperature-dependent rolling and aerodynamic resistance, showing a
significant decrease in driving range at decreasing temperature. |
| Key Words:
Truck tyre, Rolling resistance, Climate wind tunnel, Ambient temperature, Tyre temperature, Batteryelectric
truck range |
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Corresponding Author.
Jukka Hyttinen , Email. 
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