Patent ID: 8191521
Filing Date: 2012-06-05
Classification: F01L

Abstract:
1. A camshaft adjusting device for a concentric camshaft comprising: a sprocket wheel fixable to an outer camshaft at one end of a concentric camshaft; a stator fixed to the sprocket wheel and movable with the sprocket wheel, the stator having a circular internal hollow, one or more chambers extending radially outward from the circular internal hollow, each one of the chambers having an advance oil port and a retard oil port; a rotor fixable to an inner camshaft at the one end of the concentric camshaft, the rotor having a circular inner portion rotationally and concentrically positioned in the circular internal hollow, vanes extending radially outward from the inner portion, one vane positioned and movable in each one of the chambers, a trigger wheel concentric with and fixed to the rotor and positioned outside of the stator; a torsion spring, one end of the torsion spring fixed to the sprocket wheel and the other end fixed to the trigger wheel; and a center bolt which is fixable to the inner camshaft and fixes the rotor onto the inner camshaft.