Method of and apparatus for compensating for the influence of changes of rotational speed upon the characteristic curve of a clutch

A power train for use in a motor vehicle, comprising:

• a prime mover having a variable-speed rotary output element;
• an adjustable clutch rotatable by said output element at a plurality of speeds;
• signal-transmitting sensor means for monitoring at least one variable parameter including the rotational speed of said clutch;
• an adjustable actuator for said clutch;
• and
• control means arranged to receive signals from said sensor means and to adjust said actuator as a function of a variable control torque characteristic curve denoting information pertaining to a required position of said actuator as a function of signals transmitted by said sensor means, said control means including means for storing information pertaining to changes of said curve as a function of changes of the speed of said clutch and means for altering said required position of said actuator at least in dependency upon said stored information.