Measurement of Torque Transmissibility in Diaphragm Spring Clutch

This article presents the latest developments of a research project aimed at studying the evolution of the transmissibility curve of dry clutches for automobile uses during the life of the component. In particular, the instruments developed for the experimental measurement of this characteristic are illustrated, separating the effects of thinning of the disc by wear from fatigue of the clutch pushplate mechanism. The instruments developed were used to collect a large quantity of experimental data which are presented and discussed.