公开(公告)号：US20190010837A1

公开(公告)日：2019-01-10

申请号：US15804901

申请日：2017-11-06

Applicant: BorgWarner Inc.

Inventor： Larry A. PRITCHARD ,  Thomas R. BENNER ,  Christopher J. PLUTA

IPC: F01L1/348

CPC classification number: F01L1/348 ,  F01L1/047 ,  F01L1/08 ,  F01L1/34 ,  F01L1/34403 ,  F01L1/34409 ,  F01L1/34413 ,  F01L1/3442 ,  F01L1/352 ,  F01L2001/34453 ,  F01L2001/34459 ,  F01L2013/103 ,  F01L2250/02 ,  F01L2250/04 ,  F01L2820/01 ,  F01L2820/032

Abstract: An engine variable camshaft timing phaser (10) includes a sprocket (12) and a planetary gear assembly (14). The sprocket (12) receives rotational drive input from an engine crankshaft. The planetary gear assembly (14) includes two or more ring gears (26, 28), multiple planet gears (24), a sun gear (22), and a wrap spring (76). One of the ring gears (26, 28) receives rotational drive input from the sprocket (12) and one of the ring gears (26, 28) transmits rotational drive output to an engine camshaft. The sun gear (22) engages with the planet gears (24). The wrap spring (76) experiences expansion and contraction exertions to permit advancing and retarding engine valve opening and closing, and to prevent advancing and retarding engine valve opening and closing.

公开(公告)号：US20170248045A1

公开(公告)日：2017-08-31

申请号：US15507526

申请日：2015-08-24

Applicant: BorgWarner Inc.

Inventor： Larry A. PRITCHARD ,  Thomas R. BENNER ,  Christopher J. PLUTA

IPC: F01L1/348 ,  F01L1/047 ,  F01L1/344

CPC classification number: F01L1/348 ,  F01L1/047 ,  F01L1/08 ,  F01L1/34 ,  F01L1/34403 ,  F01L1/34409 ,  F01L1/34413 ,  F01L1/3442 ,  F01L1/352 ,  F01L2001/34459 ,  F01L2250/02 ,  F01L2250/04 ,  F01L2820/01 ,  F01L2820/032

Abstract: An engine variable camshaft timing phaser (10) includes a sprocket (12) and a planetary gear assembly (14). The sprocket (12) receives rotational drive input from an engine crankshaft. The planetary gear assembly (14) includes two or more ring gears (26, 28), multiple planet gears (24), a sun gear (22), and a wrap spring (76). One of the ring gears (26, 28) receives rotational drive input from the sprocket (12) and one of the ring gears (26, 28) transmits rotational drive output to an engine camshaft. The sun gear (22) engages with the planet gears (24). The wrap spring (76) experiences expansion and contraction exertions to permit advancing and retarding engine valve opening and closing, and to prevent advancing and retarding engine valve opening and closing.