Electric Parking Brakes (EPB) on caliper brakes are an established product. As of today, no common standard has evolved for the measurement of their acoustical behavior during the clamp and release process. Each supplier has its own internal measurement standard. This causes friction during requirements discussion between supplier and customer as limits value cannot be referenced to a common measurement standard and limit values cannot be easily transferred. An SAE committee, including employees of EPB suppliers and vehicle manufacturers, has developed a proposal for a measurement standard. The proposal is closing towards its final draft and is expected to be released before EuroBrake 2022 takes place. The proposal focuses on the acoustic behaviour on component level (caliper and Motor Gear Unit) thereby excluding vehicle influence. Two options are proposed for test bench setups that aim to be compatible to known caliper designs. Characteristics of sensors are proposed. Settings for data acquisition are proposed. Parameters are proposed for measurement and analysis of air borne and structure borne noise.

Continental: Dipl.-Ing Karsten Gebbers; ZF Group: Mr. Steven Rees