Continental using vacuum technology to study tyre wear particles

Continental has partnered with the Technical University of Braunschweig in Germany to develop an innovative method for analysing tyre wear. This method uses a specially adapted vacuum device mounted behind a drive wheel, which – together with advanced particle sensors – enables the detection of even the finest airborne particles behind the wheels and at other points on the vehicle.

This measurement technique was developed as part of the recently completed research project OLRAP (Online Analysis of Airborne Tyre Wear Particles at the Point of Origin and Differentiation from Other Sources). The insights gained feed directly into Continental’s tyre development, enabling targeted improvements.

Funded by the Lower Saxony Ministry of Science and Culture, the OLRAP project provides valuable insights into the properties of tyre wear. A specially equipped test vehicle, designed by Continental for real-world driving conditions, was used in the study. The vehicle was fitted with a specialised vacuum device behind a driven wheel to collect particles as they were emitted. This allowed researchers to determine the origin of the particles – whether they came from the tyres, road surface or brakes.

Particle measurement instruments developed by TU Braunschweig were mounted at various points on the vehicle, including directly behind the wheels, to collect detailed, time-specific data. These measurements were correlated with factors such as driving dynamics, road surface conditions and weather – an essential step toward scientifically accurate tire wear analysis.

Using a newly developed multi-sampler device, researchers were able to collect samples related to specific driving events. In the lab, they compared particles gathered during cornering versus straight-line driving.

“Data on the quantity, size and structure of particles allows us to optimise tyre designs and rubber compounds even more precisely – without compromising on safety or performance,” said Dr. Matthias Haufe, head of material development and industrialisation at Continental Tires.

“This not only advances our technology but also prepares our products for upcoming regulations like the Euro 7 standard, which will introduce limits on tyre wear emissions in the EU starting in 2028.”