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Brake groan analysis and improvement is progressing based on experimental measurements. An advanced brake assembly FEA model was built which considers torsional stiffness of suspension for analyzing creep groan. Creep groan is a representative groan noise of brake system from stick-slip phenomenon standpoint. This year we will present our study for advantageous direction for reduction of creep groan which will focus on friction material µ vs. Velocity (µ-V) property, friction material physical properties and relative velocity between brake pads and rotor by advanced brake assembly FEA model.

Last year, we presented the “spring - mass model” FEA simulation from stick-slip phenomenon standpoint for improvement of “creep groan”. “Creep groan” is one of representative groan of brake system for automobile and it is clarified by µ vs velocity (µ−V) property of friction material. This time, we will present our study for reduction of creep groan by pad shape parameter (chamfer and slot) with “advanced” spring - mass model” FEA simulation which used actual pad shape as mass model. In addition, this paper was revised based on oral presentation which we presented at SAE 2013.