Multi-Disc Clutches
Oil-lubricated multi-plate clutches and brakes are used, for example, in powershift automatic transmissions of motor vehicles for gear changes and frictional transmission of drive power. Multi-disc clutches are characterized by their high power density and compact design. They can be engaged and disengaged under load and speed differentials since torque transmission is frictionally engaged. Functional and service life behavior depend strongly on loads and the friction system.
The mechanical and thermal stresses on the clutch during switching operations are not constant in practical use but vary due to different switching states.
The friction, wear, drag loss, and service life behavior of oil-lubricated multi-plate clutches are investigated using 7 FZG multi-disc clutch test rigs available at the FZG. This makes it possible to assess the influences of friction pairing, friction surface grooving, cooling oil volume flow, lubricant, and loads on friction, wear, service life, and drag loss behavior.