Patent ID: 9556918
Date: 2017-01-31
CPC Classifications: B60K,F16D,F16H

Claim:
1. A method for controlling a clutch assembly having a first clutch member that is rotatable about an axis and a second clutch member that is rotatable about the axis, comprising: a) providing a wrap spring clutch having a first end, a second end and a plurality of helical coils between the first end and the second end, wherein a phase angle between the first and second ends determines a diameter of the wrap spring clutch, and wherein one of the first and second clutch members is connected with the first end of the wrap spring clutch; b) obtaining a target value that is indicative of a target speed of the second clutch member; c) determining through measurement an actual value that is indicative of an actual speed of the second clutch member; and d) changing the phase angle between the first and second ends of the wrap spring clutch to control slip between the wrap spring clutch and the other of the first and second clutch members, based on the target value and the actual value.