公开(公告)号：US20190078473A1

公开(公告)日：2019-03-14

申请号：US16124401

申请日：2018-09-07

Applicant: BorgWarner Inc.

Inventor： Daniel BROWN ,  Alexander L. KAPELEVICH

IPC: F01L1/348 ,  F02D13/02

Abstract: A variable camshaft timing device (10) that adjusts phase between a camshaft and a crankshaft including a camshaft ring gear (22) having a plurality of radially-inwardly facing gear teeth (24) each of which has an involute gear tooth profile; a sprocket ring gear (14) axially spaced from the camshaft ring gear (22) having a plurality of radially-inwardly facing gear teeth (18) each of which has an involute gear tooth profile; a compound planetary gear (26) having a camshaft planetary gear (74) and a sprocket planetary gear (72) that each face radially outwardly and include a plurality of radially-outwardly facing gear teeth (76, 78) having involute gear tooth profiles; and an eccentric shaft (28) that communicates rotational force from an electric motor (30) to the compound planetary gear (26) relatively displacing the camshaft ring gear (22) with respect to the sprocket ring gear (14).