US 11,891,923 B2
Valvetrain with rocker shaft housing magnetic latch
Adam Boden, Homer, MI (US); and Anthony Leon Spoor, Union City, MI (US)
Assigned to EATON INTELLIGENT POWER LIMITED, Dublin (IE)
Appl. No. 17/638,844
Filed by Eaton Intelligent Power Limited, Dublin (IE)
PCT Filed Sep. 10, 2020, PCT No. PCT/EP2020/025405
§ 371(c)(1), (2) Date Feb. 27, 2022,
PCT Pub. No. WO2021/047796, PCT Pub. Date Mar. 18, 2021.
Claims priority of provisional application 62/970,729, filed on Feb. 6, 2020.
Claims priority of provisional application 62/898,297, filed on Sep. 10, 2019.
Prior Publication US 2022/0333507 A1, Oct. 20, 2022
Int. Cl. F01L 1/18 (2006.01); F01L 9/26 (2021.01); F01L 13/00 (2006.01); F01L 13/06 (2006.01)
CPC F01L 1/181 (2013.01) [F01L 9/26 (2021.01); F01L 13/0005 (2013.01); F01L 13/06 (2013.01); F01L 2013/001 (2013.01); F01L 2305/00 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A valvetrain for an internal combustion engine of a type that has a combustion chamber, and a moveable valve having a seat formed in the combustion chamber, comprising:
a rocker shaft;
a camshaft;
a rocker arm assembly comprising a cam follower configured to engage a cam mounted on the camshaft as the camshaft rotates and a first rocker arm pivotally mounted on the rocker shaft; and
an electromagnetic latch assembly comprising an electromagnet and a pin that translates between a first position and a second position to alter a configuration of the rocker arm assembly;
wherein the electromagnetic latch assembly is powered by a circuit that passes through the rocker shaft.