The measurement of brake squeal vibrations is a difficult problem, because the rotating disc does not allow any physical contact with the sample during measurement. The use of accelerometers is difficult and very time consuming. Non-contact scanning techniques (e.g. vibrometers) are widely used for these applications, and although they provide a very high temporal resolution is available, still...

Vehicle braking system is considered as one of the most fundamental safety-critical systems in modern vehicles as its main purpose is to stop or decelerate the vehicle. The frictional heat generated during braking application can cause numerous negative effects on the brake assembly such as brake fade, premature wear, thermal cracks and disc thickness variation (DTV). In the past, surface rough...

Brake-wear particle emissions are the result of components a friction brake being in tribological contact, and they classified as non-exhaust emissions. Since most emitted particles belong to size classes particulate matter (≤10 μm) differ significantly terms their physico-chemical properties from automotive exhaust emissions, this source is particular relevance human health and, therefore, foc...

The Particle Measurement Programme (PMP) informal working group co-ordinated a global interlaboratory study (ILS) on brake wear particle emissions with the participation of 16 laboratories in 2021. Two articles present results ILS: (I) particulate matter mass (PM) and (II) number (PN) emissions. test matrix covered different systems, including ECE NAO pad materials grey cast iron discs drum bra...

In this study, different disc brakes and friction materials are evaluated with respect to particle emission output characteristic features derived. The measurements take place on an inertia dynamometer using a constant volume sampling system. Brake wear factors of concepts in sizes determined compared, grey cast iron disc, tungsten carbide-coated carbon ceramic disc. were tested over section (t...

Within this paper the convective heat dissipation from the front brake discs fitted to the left and right hand side of a high performance passenger car has been compared. The tools used in this investigation include computational fluid dynamics (CFD) and vehicle testing. The results show that although identical discs are fitted to both sides of the vehicle the disc fitted to the left hand side ...