Patent ID: 8146551

Claim:
An assembly for an internal combustion engine comprising: a) at least one phaser comprising: i) a housing with an outer circumference for accepting drive force; ii) a rotor coaxially located within the housing, the housing and the rotor defining at least one vane separating a chamber in the housing into advance and retard chambers, the vane being capable of rotation to shift the relative angular position of the housing and the rotor; and iii) a control valve received within a bore in the rotor for directing fluid to the chambers; b) a camshaft assembly comprising: i) an outer camshaft piece having: an outer cam integrally attached to the outer circumference of the housing through a middle portion; the outside cam, the middle portion, and the outer circumference of the housing for accepting driving force defining a hollow extending a length of the outer camshaft piece; and ii) an inner camshaft piece having: an inner cam adjacent to the outer cam, having a tube portion extending from a first side of the inner cam and received by the hollow defined by the outer camshaft piece, connecting the inner cam to the rotor of the phaser, and a shaft portion extending to an end portion from a second side of the inner cam; wherein a passage connected to an inlet line extends through the shaft portion, the inner cam, and the tube portion, directing fluid to the control valve of the phaser; wherein when the rotor of the phaser moves, the inner cam is phased relative to the outer cam, allowing duration of a valve event to be increased or decreased.