Wet friction elements are used in various applications within the drivetrain. They are used as shifting clutches in Step ATs, Wet Starting Clutches in DCTs, Step ATs and CVTs, Torque converter lock up clutches, Transfer Case clutches and Disconnecting clutches in Hybrid applications. The recent global automotive market trends and environmental concerns require solutions for driving performance and fuel economy for all of these applications. This paper highlights the latest high performance friction products and technologies and how they enable improvements in the various aspects of clutch operation. The paper presents in details: New requirements for friction elements; New friction materials and Technologies (High temperature, Hot spot resistance, High coefficient); NVH Improvements; Drag torque simulation tools; Drag torque reduction solutions; Weight and package reduction concept; Cost reduction concepts.
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