Patent ID: 8231488
Filing Date: 2012-07-31
Classification: H02K,Y10S

Abstract:
1. A pulley assembly for an accessory drive of an internal combustion engine comprising a hub with an axis (A), an annular pulley of ferromagnetic material radially supported at least indirectly on said hub, a ring of electrically conducting material rotationally connected to and radially supported on said hub, and at least a pair of magnets rigidly connected to said pulley and facing said ring, said pulley defining a cavity accommodating said ring said at least pair of magnets defining an alternating sequence of poles and being arranged so as to induce an electric current within said ring when the ring rotationally moves with respect to said magnets; a dynamic damper having an elastic sleeve or viscoelastic sleeve adapted to connect said ring to said hub, wherein said damper comprises a rigid supporting element essentially perpendicular to said axis (A) and connected to said ring and to said elastic sleeve or viscoelastic sleeve, wherein said damper comprises a cylindrical wall rigidly connected to said supporting element and accommodating said elastic sleeve or viscoelastic sleeve and said hub, and comprising a bearing fitted on said damper and supporting said pulley.