Detection, Classification and Objective Rating of Creep Groan Phenomena in Brake NVH Development

Severin Huemer-Kals*, Máté Tóth, Jurij Prezelj, Jure Murovec, Martin Zacharczuk, Karl Häsler, Peter Fischer

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paper


Groaning brakes are unpleasant, for passengers and passers-by. Even after many years of research, the characteristic low-frequency, stick-slip-induced brake creep groan is still a problem in terms of customer feedback and quality perception of passenger cars. Groan-free braking is certainly possible, whether through active measures such as piezo-based smoothing of the friction curve, or through passive measures such as the optimization of the friction characteristics by means of pad formulation or disc coating. However, this technically optimal goal is rarely achieved. The reasons for this are high costs for active systems or design conflicts within the numerous requirements placed on the friction materials. Hence, compromises have to be made and a certain “amount” of brake creep groan has to be allowed. How to quantify this “amount” resp. the annoyance due to creep groan noise is the content of the present work: essential aspects of testing, detection, classification and last but not least the objective rating itself are shown. The results of this work form the basis for a modern NVH development process, which is able to precisely quantify the annoyance of brake creep groan and therefore enables an effective and efficient reduction of creep groan noise and vibration.
Original languageEnglish
Title of host publicationXXXIX. Internationales μ-Symposium 2022 Bremsen-Fachtagung. IµSBC 2022.
EditorsRalph Mayer
Place of PublicationBerlin, Heidelberg
PublisherSpringer Vieweg
ISBN (Print)978-3-662-66327-1
Publication statusE-pub ahead of print - 17 Nov 2022
EventXXXIX. International μ-Symposium 2022 Brake Conference: IµSBC 2022 - Chemnitz, Germany
Duration: 18 Nov 2022 → …


ConferenceXXXIX. International μ-Symposium 2022 Brake Conference
Abbreviated titleIµSBC 2022
Period18/11/22 → …

Fields of Expertise

  • Mobility & Production


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