Increasing the Performance of Motor Vehicle Clutches By the Use of Ceramic and the Resulting Effects on System Design
Published May 23, 2004 by Society of Automotive Engineers of Korea in South Korea
The experimental and constructive results illustrate that engineering-ceramic materials have a high potential in the field of dry running friction systems. According to first estimations, it is possible to build the vehicle clutch 53% smaller or to transmit up to 180% higher torque at the same size by an appropriate selection of the system friction pairing and a ceramic adequate design. The friction coefficient characteristic (decreasing friction coefficient above sliding speed) is unfavorable with regard to comfort (self-induced grab oscillations) of the vehicle clutch. Counteractive measures are developed in further research projects by barrier layer modifications of the ceramic surface on a clutch system. Furthermore, it is important to select the test procedure of the experimental analyses as close to the system as possible in order to obtain exact information concerning the target system.