Friction Screening Test for Wet Multiple Disc Clutches with Paper Type Friction Material
OEM’s rising requirements on friction performance of wet multiple disc clutches and brakes can only be met by development of new friction materials and lubricants. Due to the need of intensive testing, the corresponding engineering process is costly and time consuming. This problem is picked up by a research project of Forschungsvereinigung Antriebstechnik e.V. (FVA) at the FZG (TU München) with the goal of a standardized short time test procedure which can be accepted both by suppliers and OEMs. A screening test for the determination of friction behavior of wet multiple disc clutches with organic paper type friction materials has been developed as well as specific values for the evaluation of the test. Within a few hours, the friction behavior is tested under various load conditions and evaluated with an excellent differentiation. Influences of load conditions and additive package on level of coefficient of friction and tendency to shudder of the clutch are discussed by exemplary test results of proposed friction screening test.