US 12,258,888 B2
Valve actuation system comprising hydraulic lash adjuster operating via a one-way coupling mechanism
Matei Alexandru, Simsbury, CT (US); and Gabriel S. Roberts, Wallingford, CT (US)
Assigned to Jacobs Vehicle Systems, Inc., Bloomfield, CT (US)
Filed by Jacobs Vehicle Systems, Inc., Bloomfield, CT (US)
Filed on May 3, 2024, as Appl. No. 18/654,952.
Claims priority of provisional application 63/499,745, filed on May 3, 2023.
Prior Publication US 2024/0369001 A1, Nov. 7, 2024
Int. Cl. F01L 1/46 (2006.01); F01L 1/18 (2006.01); F01L 1/24 (2006.01); F01L 1/26 (2006.01)
CPC F01L 1/46 (2013.01) [F01L 1/181 (2013.01); F01L 1/2416 (2013.01); F01L 1/26 (2013.01); F01L 1/267 (2013.01); F01L 2001/467 (2013.01); F01L 2305/00 (2020.05)] 15 Claims
OG exemplary drawing
 
14. A system for actuating at least two engine valves associated with a cylinder of an internal combustion engine, comprising:
a first rocker assembly operatively connected to a first valve actuation motion source and to a first engine valve of the at least two engine valves, the first rocker assembly comprising a first lost motion component arranged in series with a first input rocker and a first output rocker, the first input rocker configured to receive first valve actuation motions from the first valve actuation motion source and the first output rocker configured to impart the first valve actuation motions to the first engine valve, wherein the first lost motion component is operable, in a motion absorbing state, to prevent conveyance of the first valve actuation motions from the first input rocker to the first output rocker and, in a motion conveying state, to convey the first valve actuation motions from the first input rocker to the first output rocker;
a second rocker assembly operatively connected to a second valve actuation motion source and to a second engine valve of the at least two engine valves, the second rocker assembly comprising at least one second rocker configured to receive second valve actuation motions from the second valve actuation motion source and to impart the second valve actuation motions to the second engine valve; and
a one-way coupling mechanism disposed between the first output rocker and the at least one second rocker such that the second valve actuation motions are transferred from the at least one second rocker to the first output rocker, and the first valve actuation motions are not transferred from the first output rocker to the at least one second rocker,
wherein the first rocker assembly comprises a hydraulic lash adjuster, and
wherein the first valve actuation motion source includes a refill period comprising a sub-base circle lift configured to eliminate load placed upon the hydraulic lash adjuster by expansion of the first lost motion component.