Patent ID: 8516982
Filing Date: 2013-08-27
Classification: F01L,Y10T

Abstract:
1. A camshaft phaser for controllably varying the phase relationship between a crankshaft and a camshaft in an internal combustion engine, said camshaft phaser comprising: a housing having a bore with a longitudinal axis; a harmonic gear drive unit disposed radially within said housing, said harmonic gear drive unit comprising a circular spline and an axially adjacent dynamic spline, a flexspline disposed radially within said circular spline and said dynamic spline, a wave generator disposed radially within said flexspline, and a rotational actuator connectable to said wave generator, wherein one of said circular spline and said dynamic spline is fixed to said housing in order to prevent relative rotation therebetween; a hub rotatably disposed radially within said housing axially adjacent to said harmonic gear drive unit and attachable to said camshaft and fixed to the other of said circular spline and said dynamic spline in order to prevent relative rotation therebetween; and an anti-rotation means for temporarily fixing said circular spline to said dynamic spline in order to prevent relative rotation therebetween when said hub is being attached to said camshaft.