Assessment of the effect of passenger car wheel unbalance on driving comfort
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Faculty of Mechanical Engineering, Military University of Technology, Polska
-, MAT Dania Sp. Z.o.o., Polska
Submission date: 2021-12-07
Final revision date: 2021-12-27
Acceptance date: 2021-12-27
Publication date: 2021-12-30
Corresponding author
Andrzej Wiśniewski   

Faculty of Mechanical Engineering, Military University of Technology, gen. Sylwestra Kaliskiego 2, 00-908, Warsaw, Polska
The Archives of Automotive Engineering – Archiwum Motoryzacji 2021;94(4):61-71
This paper presents the results of experimental investigations of the effects of car wheel unbalance on driving safety and comfort. Basic information about types of wheel unbalance, their causes, and effects are included. The test subject was a BMW 3 Series car with rear-wheel drive. A specific unbalance was introduced on the front steered wheels. The vehicle was driven in a straight line on an asphalt road in good condition at speeds between 70 km/h and 140 km/h. During the test runs, acceleration waveforms were recorded from sensors placed on the lower control arm, driver's seat, and steering wheel. The vibration level of the unbalanced wheel increases with the driving speed and with the increase in unbalance. The highest increase in vibration amplitude occurred on the steering wheel at speeds between 100 km/h and 120 km/h. These vibrations have a direct effect on the driver. This is evidenced by negative driver perceptions such as fatigue and driving discomfort. This was also confirmed by the calculated vibration exposure levels. Driving with unbalanced wheels accelerates wear on the tyres, steering, drive, and suspension components of the vehicle.
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