Patent ID: 8807313

Claim:
A wet friction clutch assembly comprising: a housing member having a body, a cover, and a central cavity therein; a pulley member fixedly coupled to said housing member, wherein said housing member and pulley member both rotate at input speed; a stationary base member for mounting said housing member on a surface, said base member having a shaft member positioned in said cavity in said housing member; a fan member rotatably attached to said housing member; a clutch mechanism positioned in said housing member and adapted to selectively rotate said fan member; a valve member for modulating the activating oil pressure utilized to selectively activate the clutch mechanism, said valve member being positioned along the central axis of said shaft member; wherein the rotation of said fan member can be controlled between minimum and maximum speeds and at any speed inbetween; and a sensor mechanism positioned along the central axis of said shaft member and at least partially inside said valve member; and a target ring positioned on said clutch mechanism; wherein said rotational speed of said fan member can be ascertained.