Driver response at tyre blow-out in heavy vehicles & the importance of scrub radius
Paper i proceeding, 2014

Front tyre blow-outs lead to several fatal accidents involving heavy vehicles. Common for most heavy vehicles is a positive scrub radius. This can result in a destabilising steering wheel torque at front tyre blow-out. In this study the safety improvement achieved when reducing scrub radius is quantified. By using a heavy truck equipped with a modified electric power steering system it was possible to change the scrub radius virtually. Brakes were configured to emulate front tyre blow-out which appeared as a sudden disturbance on one of the front tyres. In total 20 drivers took part in the study which was run on a test track at 50 km/h. Results show that the produced average lateral deviation from the original direction was 23 cm, when scrub radius was 12 cm, compared to 16 cm, when scrub radius was 0 cm. The main cause of the observed difference was a small, yet significant, initial overshoot in steering wheel angle which can be derived from the destabilising steering wheel torque.


Kristoffer K D Tagesson

Chalmers, Tillämpad mekanik, Fordonsteknik och autonoma system

Bengt J H Jacobson

Chalmers, Tillämpad mekanik, Fordonsteknik och autonoma system

Leo Laine

Chalmers, Tillämpad mekanik, Fordonsteknik och autonoma system

25th IEEE Intelligent Vehicles Symposium, IV 2014; Dearborn, MI; United States; 8 June 2014 through 11 June 2014

1157-1162 6856544
978-147993638-0 (ISBN)




Robotteknik och automation





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