CAMSHAFT PHASER AND ACTUATOR FOR THE SAME

摘要

A camshaft phaser includes a camshaft phaser input member connectable to a crankshaft; a camshaft phaser output member connectable to a camshaft; an intermediate member rotatable relative to the camshaft phaser input member such that rotation of the intermediate member relative to the camshaft phaser input member causes the camshaft phaser output member to rotate relative to the camshaft phaser input member; and a rotational actuator configured to selectively rotate the intermediate member relative to the camshaft phaser input member, the rotational actuator comprising. The rotational actuator includes a compound planetary gear set having an input planetary gear set driven by the camshaft phaser input member and an output planetary gear set driven by the input planetary gear set; and an adjusting actuator connected to the compound planetary gear set.

主权项

1. A camshaft phaser for use with an internal combustion engine for controllably varying the phase relationship between a crankshaft and a camshaft in said internal combustion engine, said camshaft phaser comprising:
a camshaft phaser input member connectable to said crankshaft of said internal combustion engine to provide a fixed ratio of rotation between said camshaft phaser input member and said crankshaft; a camshaft phaser output member connectable to said camshaft of said internal combustion engine; an intermediate member rotatable relative to said camshaft phaser input member such that rotation of said intermediate member relative to said camshaft phaser input member causes said camshaft phaser output member to rotate relative to said camshaft phaser input member; and a rotational actuator configured to selectively rotate said intermediate member relative to said camshaft phaser input member, said rotational actuator comprising: a compound planetary gear set centered about a planetary gear set axis and having an input planetary gear set driven by said camshaft phaser input member and an output planetary gear set driven by said input planetary gear set; and an adjusting actuator connected to said compound planetary gear set and being switchable between an idling state and an adjusting state, wherein said idling state causes said intermediate member to be rotated together with said camshaft phaser input member in a one-to-one relationship through said compound planetary gear set and wherein said adjusting state causes said intermediate member to rotate relative to said camshaft phaser input member through said compound planetary gear set.