Patent ID: 7178652
Filing Date: 2007-02-20
Classification: B60K,F16D

Abstract:
1. A power transmission device comprising: a first rotary member; a second rotary member; a transfer clutch operably disposed between said first and second rotary members; a clutch actuator controlling engagement of said transfer clutch, said clutch actuator including an electric motor driving a first gear meshed with a second gear, a third gear driven by said second gear and meshed with a fourth gear, a rotary drive member with gear teeth meshed with said fourth gear and having followers engaging a cam surface on a non-rotary cam member; and a control system actuating said electric motor to control the direction and amount of rotary movement of said drive member which controls the directions and amount of translational movement of said cam member relative to said transfer clutch, said control system including a rotary position sensor operable to detect the rotated position of one of said first, second, third and fourth gears.