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By the appropriate selection of the following parameters:

Silicone oil

Degree of filling

Clearance

Lamella shapes (Figure above)

The torque characteristic of a visco-hydraulic clutch can be varied in a within a wide range from an almost linear to an extremely degressive course over the differential speed.

Since the physical processes occurring in a visco-hydraulic clutch cannot be accurately determined when slit lamellae are used, the following general equation proved in practice is used to mathematically describe a degressive clutch characteristic.

Eq. 3-20

Where: M0, j, q = clutch-specific parameters