Multivariate Judder Behavior Analysis of Dry Clutches Based on Torque Signal and Friction Material

Automotive industries are always concerned to offer more comfort to drivers. In particular, the judder must be avoided as much as possible. Although judder is a very complex phenomenon caused by several factors, this work has focused only on the clutch facing. Based on multivariate statistical analysis and on the torque signal from a real bench test, it has been possible to separate the facings according to their judder performance and manufacturing characteristics. Most importantly, such analysis has been able to establish a gold standard behavior for torque that might be extremely helpful for friction material development, allowing a more consistent understanding of the judder behavior.