Valve actuation system comprising lost motion and high lift transfer components in a main motion load path
A valve actuation system comprising a valve actuation motion source configured to provide a main event valve actuation motion to at least one engine valve via a main motion load path that comprises at least one valve train component. The valve actuation system further includes a lost motion component arranged within a first valve train component in the main motion load path, the lost motion component being controllable to operate in a motion conveying state or a motion absorbing state. The valve actuation system also comprises a high lift transfer component arranged in the main motion load path, with the high lift transfer component being configured to permit the main motion load path to convey at least a high lift portion of the main event valve actuation motion when the lost motion component is in the motion absorbing state.
1. A valve actuation system comprising:
a main motion load path comprising at least one valve train component;
a valve actuation motion source configured to provide a main event valve actuation motion to at least one engine valve via the main motion load path;
a lost motion component arranged within the at least one valve train component, the lost motion component configured to selective switch between (i) a motion conveying state in which the lost motion component conveys the main event valve actuation motion to the at least one engine valve, and (ii) during engine braking operation of the valve actuation system, a motion absorbing state in which the lost motion component does not convey at least a portion of the main event valve actuation motion to the at least one engine valve; and
a high lift transfer component arranged to operate entirely in the main motion load path, the high lift transfer component configured to convey at least a high lift portion of the main event valve actuation motion to the at least one engine valve when the lost motion component is in the motion absorbing state.
2. The valve actuation system of claim 1 , wherein the high lift transfer component is incorporated in the lost motion component.
3. The valve actuation system of claim 2 , wherein the high lift transfer component comprises a stroke limiter.
4. The valve actuation system of claim 3 , wherein the lost motion component comprises a mechanical locking subsystem.
5. The valve actuation system of claim 3 , wherein the lost motion component comprises a hydraulic locking subsystem.
6. The valve actuation system of claim 2 , wherein the high lift transfer component comprises a secondary locking subsystem.
7. The valve actuation system of claim 1 , wherein the at least one valve train component comprises a valve bridge.
8. The valve actuation system of claim 1 , wherein the at least one valve train component comprises a rocker arm.
9. The valve actuation system of claim 1 , wherein the at least one valve train component comprises a push rod.
10. The valve actuation system of claim 1 , wherein the high lift transfer component is incorporated in the at least one valve train component.
11. The valve actuation system of claim 10 , wherein the high lift transfer component comprises a stroke limiter.
12. The valve actuation system of claim 11 , wherein the stroke limiter comprises at least one contact surface of the at least one valve train component.
13. The valve actuation system of claim 12 , wherein the at least one contact surface comprises a retractable piston.
14. The valve actuation system of claim 10 , wherein the at least one valve train component comprises a valve bridge.
15. The valve actuation system of claim 10 , wherein the at least one valve train component comprises a rocker arm.
16. The valve actuation system of claim 10 , wherein the at least one valve train component comprises a push rod.