Patent ID: 8186319
Filing Date: 2012-05-29
Classification: F01L,Y10T

Abstract:
1. A method of assembling a camshaft assembly for an internal combustion engine having the steps of placing an inner shaft having holes within a hollow outer shaft having slots; such that the slots on the outer shaft are aligned with the holes on the inner shaft, fixing a first set of cam lobes to the outer shaft and placing a second set of cam lobes with a clearance fit over slots on the outer shaft; and mounting a variable cam timing (VCT) device to the inner shaft and the outer shaft of the camshaft, such that the position of the inner shaft is adjustable relative to the outer shaft, further comprising the steps of: a) inserting hollow pins into a hole defined by the second set of cam lobes, through the slot in the outer shaft and the hole in the inner shaft, continuing through the axis of rotation to an other side of the second set of cam lobes; and b) inserting a plug into a first end of the hollow pin; and c) introducing fluid under pressure into the hollow pins through a second end of the hollow pin, opposite the first end by which centers of the hollow pins are swelled within an inner diameter of the inner shaft.