Abstract: Apparatus for damping vibrations in the power train between the engine and the transmission of an automobile has a first flywheel connectable to the crankshaft of the engine, a second flywheel connectable to the input shaft of the transmission by a friction clutch, and at least one damper between the flywheels. The damper has a twin-section output element which is axially movably secured to the second flywheel by a toothed coupling and is biased by coil springs which react against the first flywheel. The sections of the output element are biased in opposite directions by at least one of the coil springs or by one or more additional coil springs so that the teeth of the coupling mate without play, at least under no-load or partial-load operating conditions in the neutral position of the damper.

Abstract: A friction clutch wherein the pressure plate and/or the flywheel consists of finely striped pearlitic cast iron with a free ferrite content of less than 5%, with a graphite distribution finer than 3 according to VDG specification P 441, and with a titanium content of between 0.16% and 0.3% by weight. The friction disc between the pressure plate and the flywheel has two friction linings at least one of which, namely, the lining facing the part with a higher titanium content, consists of a sintered metallic or ceramic material or contains organic components. The pressure plate and/or the flywheel further contains up to 0.25% by weight of tin and up to 1% by weight of copper. The ratio of copper to tin is approximately four-to-one.