US 9,810,109 B2
Engine variable camshaft timing phaser with planetary gear set
Christopher J. Pluta, Lansing, NY (US); and Michael W. Marsh, Dryden, NY (US)
Assigned to BorgWarner Inc., Auburn Hills, MI (US)
Appl. No. 15/511,667
Filed by BorgWarner Inc., Auburn Hills, MI (US)
PCT Filed Sep. 10, 2015, PCT No. PCT/US2015/049291
§ 371(c)(1), (2) Date Mar. 16, 2017,
PCT Pub. No. WO2016/044044, PCT Pub. Date Mar. 24, 2016.
Claims priority of provisional application 62/051,514, filed on Sep. 17, 2014.
Prior Publication US 2017/0254235 A1, Sep. 7, 2017
Int. Cl. F01L 1/34 (2006.01); F01L 1/352 (2006.01); F16H 1/28 (2006.01); F16H 57/08 (2006.01)
CPC F01L 1/352 (2013.01) [F16H 1/28 (2013.01); F16H 57/082 (2013.01); F01L 2250/06 (2013.01); F01L 2820/032 (2013.01); F16H 2001/2872 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An engine variable camshaft timing phaser (10), comprising:
a sprocket (12) receiving rotational drive input from an engine crankshaft;
a first ring gear (26) receiving rotational drive input from said sprocket (12);
a plurality of planet gears (24) engaged with said first ring gear (26);
a sun gear (22) engaged with said plurality of planet gears (24), said sun gear (22) driven by an electric motor (32);
a second ring gear (28) engaged with said plurality of planet gears (24); and
a third ring gear (30) engaged with said plurality of planet gears (24);
wherein, in operation, relative rotational movement between said sprocket (12) and said sun gear (22) caused by the electric motor (32) advances or retards engine valve opening and closing.