Solutions for Increased Power Density at Shifting Clutches

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Solutions for Increased Power Density at Shifting Clutches

Merkel, Harald

Modern vehicle and drivetrain concepts face many integration problems due to the various functions within the system. Hybrid and Electric vehicles present new challenges, especially in terms of weight reduction and installation space. BorgWarner has developed special solutions to increase the power density of shifting clutches. New friction materials with increased static and dynamic coefficient of friction have been developed to allow a compact clutch design. BorgWarner has also developed new high performance friction materials which can handle higher interface temperatures without sacrificing robustness against hot spotting. Thanks to these advantages, the power and energy limits of clutches can be increased. A new friction plate design has been developed using plastic core plates and a new manufacturing concept. The design advantage is getting the same performance in a smaller packaging space with lower weight. BorgWarner has also developed a new clutch concept that allows high torque transmission in an extremely compact installation space. The new clutch design combines a friction plate clutch with a mechanical lock device.