US 12,448,905 B2
Valve bridge with integrated spline bushing for lost motion and engine brake
Nicola Andrisani, Turin (IT); and Emanuele Raimondi, Turin (IT)
Assigned to EATON INTELLIGENT POWER LIMITED, Dublin (IE)
Appl. No. 18/845,150
Filed by EATON INTELLIGENT POWER LIMITED, Dublin (IE)
PCT Filed Mar. 15, 2023, PCT No. PCT/EP2023/025115
§ 371(c)(1), (2) Date Sep. 9, 2024,
PCT Pub. No. WO2023/174580, PCT Pub. Date Sep. 21, 2023.
Claims priority of provisional application 63/319,902, filed on Mar. 15, 2022.
Prior Publication US 2025/0075643 A1, Mar. 6, 2025
Int. Cl. F02D 13/04 (2006.01); F01L 1/18 (2006.01); F01L 1/26 (2006.01); F01L 13/00 (2006.01); F01L 13/06 (2006.01)
CPC F01L 1/181 (2013.01) [F01L 1/267 (2013.01); F01L 13/0005 (2013.01); F01L 13/065 (2013.01); F01L 2013/001 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A rocker arm assembly for an engine comprising:
a main body rotatable about a shaft, the main body having a roller end and a valve end;
a first switchable castellation assembly disposed in the valve end, the first switchable castellation assembly having a distal end configured to selectively move a first valve; and
a second switchable castellation assembly disposed in the valve end, the second switchable castellation assembly having a distal end configured to engage a valve bridge assembly, the valve bridge assembly configured for engaging and actuating a second valve,
wherein the first switchable castellation assembly and the second switchable castellation assembly each comprise:
a lost motion shaft, the lost motion shaft being configured to transfer a lift profile to the valve end; and
a switchable castellation device, the switchable castellation device comprising:
a rotatable first spline bushing, and
a spline body,
wherein the first spline bushing is configured to switch between a locked position and an unlocked position, and wherein a lost motion is obtained by sliding the lost motion shaft when the first spline bushing is in the unlocked position.