A device for setting the torque transmitted by a friction clutch (12),
having
an actuator chain which comprises an electric motor (45), a step-down gear
(42) and a mechanism for converting the rotational movement into a displacement
of a pressure plate (29) of the clutch (12), so as to enable the
torque which is transmitted to be set precisely and rapidly even given high friction.
For this purpose, the electric motor (45) and/or step-down gear (42)
is/are affected by friction, the conversion mechanism (31, 32, 35, 36, 40)
and/or the friction clutch (12) itself is/are affected by elasticity, and,
to set the torque (Md) of the friction clutch (12), a position regulator
(47) which is operatively connected to the electric motor (45) and
a sensor (46; 46) which determines the position of one of the links
of the actuator chain (45, 42, 41, 40, 36, 35, 32, 31, 29) are provided,
the sensor being present at a location upstream of a substantial part of the elasticity
in the force-flow direction. The corresponding control and calibrating method is
also developed.