HAMBURG, Germany – Stefan Bachmann is product team lead of MEYLE’s product team Brake, Drive and NVH. The following is an excerpt from a MEYLE press release and partial transcription of a YouTube video.
What is going on in the area of product development? What is it about squealing brakes?
Are brake noises bad per se?
What does the driver type have to do with the brake pads?
When it comes to braking, there are many questions – but luckily there are also experts who are clearing up myths and false information. That’s why we asked Stefan Bachmann what is particularly important when it comes to brakes.
What trends and developments does MEYLE observe in the constantly changing automotive world?
Stefan Bachmann: We note a clear trend towards sensitive perception of sounds. This development is easy to understand, especially with regard to the electromobility: By eliminating engine noises, the driver becomes more sensitive to noise in the vehicle, so that previously unnoticed brake noises can now be perceived as disturbing. Last but not least, the increasing demand for emission reduction should also be mentioned: Brake dust development plays a key role here, so that we will focus our research and development activities on this in the coming years. These requirements, combined with better or constant performance of the brake pads and discs, represent a particular challenge for the industry in the coming years.
Are noises during braking bad? Which factors and components can be influenced in product development to minimize brake noise?
Bachmann: No. A squealing brake does not always mean a broken brake pad or disc. First and foremost, it must be said that there are actually brake systems with mechanical wear contacts. Instead of a message in the cockpit about the wear, a squealing noise is heard when braking. As a rule, the sportier the brake pads are, the more they tend to squeal. In the case of ‘sporty’ drivers, higher loads can result in stronger vibrations between the brake pads and the brake disc, which can be perceived by the driver as disturbing or squealing in certain frequency ranges. In addition, ‘neighbouring’ components such as control arm bushings are worn out and vibration is transmitted in the direction of the last component of the overall suspension – the brake. Nevertheless, a squealing brake can of course also mean that there is a fault in the brake system or that incorrect brake components have been installed. In the case of an unusual process, it should therefore always be inspected by an expert in the workshop!