Castellation mechanism with reverse reset
AssigneeEaton Intelligent Power Limited
InventorsPritam Edke, Nikhil Saggam, Nicola Andrisani
Life of this patent
Estimating the term…
Abstract
A rocker arm assembly operable in an engine drive mode and at least one of a late intake valve closing (LIVC) mode and an internal exhaust gas recirculation (iEGR) mode, the rocker arm assembly selectively opening first and second engine valves. The rocker arm assembly includes a rocker arm configured to rotate about a rocker shaft, and a reverse reset capsule assembly movable between (i) a locked position configured to perform one of an LIVC operation and an iEGR operation, and (ii) an unlocked position that does not perform the LIVC operation or the iEGR operation. An actuator assembly is configured to selectively move the reverse reset capsule assembly between the first and second positions.
Claims20
A rocker arm assembly operable in an engine drive mode and at least one of a late intake valve closing (LIVC) mode and an internal exhaust gas recirculation (iEGR) mode, the rocker arm assembly selectively opening first and second engine valves and comprising:
- a rocker arm configured to rotate about a rocker shaft;
- a reverse reset capsule assembly movable between (i) a locked position configured to perform one of an LIVC operation and an iEGR operation, and (ii) an unlocked position that does not perform the LIVC operation or the iEGR operation;
- and
- an actuator assembly configured to selectively move the reverse reset capsule assembly between the first and second positions.
A valvetrain assembly comprising:
- a first engine valve;
- a second engine valve;
- a valve bridge operatively associated with the first and second engine valves;
- and
- a rocker arm assembly comprising:
- a rocker arm rotatably coupled to a rocker shaft;
- a lost motion spigot assembly at least partially disposed within a first bore formed in the rocker arm, the lost motion spigot assembly configured to selectively engage the valve bridge to actuate the first and second engine valves;
- a reverse reset capsule assembly at least partially disposed within a second bore formed in the rocker arm, and movable between (i) a locked position configured to perform one of a late intake valve closing (LIVC) operation and an internal exhaust gas recirculation (iEGR) operation by engaging only the second engine valve, and (ii) an unlocked position that does not perform the LIVC operation or the iEGR operation;
- and
- an actuator assembly at least partially disposed within a third bore formed in the rocker arm, and configured to selectively move the reverse reset capsule assembly between the first and second positions.
Dependencies are inferred from the claim text.