Patent ID: 6123183
Filing Date: 2000-09-26
Classification: B60K,F16D

Abstract:
A rotation transmission device for a vehicle, comprising:a first clutch including an inner member, an outer ring, and a plurality of engaging elements provided between said inner member and said outer ring for selective transmission and shutoff of rotation power between said inner member and said outer ring;an electromagnetic clutch including an electromagnetic coil for locking and disengaging said first clutch; anda controller for selectively supplying a first non-zero current and a second non-zero current to said electromagnetic clutch, wherein the first non-zero current is at a current level which is different than said second non-zero current, wherein the first non-zero current is sufficient to pre-charge said electromagnetic coil, but is insufficient to cause said electromagnetic clutch to lock said first clutch, and wherein said second non-zero current is sufficient to cause said electromagnetic clutch to lock said first clutch.