초록 ▼

A system and method of actuating one or more engine valves is disclosed. In one embodiment, the system comprises: a valve train element; a rocker arm pivotally mounted on a shaft and adapted to rotate between a first position and a second position, the rocker arm selectively receiving motion from th

A system and method of actuating one or more engine valves is disclosed. In one embodiment, the system comprises: a valve train element; a rocker arm pivotally mounted on a shaft and adapted to rotate between a first position and a second position, the rocker arm selectively receiving motion from the valve train element; a valve bridge disposed above the one or more engine valves; and a lost motion system disposed in the valve bridge.

대표청구항 ▼

1. A method of selectively actuating an engine valve to produce an engine valve event, said method comprising the steps of: providing motion imparting means in selective contact with a rocker arm pivotally mounted on a rocker shaft;providing a valve bridge in contact with said rocker arm;providing a

1. A method of selectively actuating an engine valve to produce an engine valve event, said method comprising the steps of: providing motion imparting means in selective contact with a rocker arm pivotally mounted on a rocker shaft;providing a valve bridge in contact with said rocker arm;providing an engine valve in contact with said valve bridge;selectively supplying hydraulic fluid to the valve bridge; andcontrolling the amount of motion imparted to the engine valve responsive to the supply of hydraulic fluid to the valve bridge. 2. The method of claim 1, further comprising the step of releasing hydraulic fluid from the valve bridge to thereby modify the engine valve event. 3. The method of claim 2, wherein the engine valve event comprises a main exhaust event. 4. The method of claim 2, wherein the engine valve event comprises a main intake event. 5. The method of claim 1, further comprising the step of providing a lost motion component in said movable valve bridge. 6. The method of claim 5, wherein the step of providing a lost motion component in said valve bridge further comprises providing a piston slidably disposed in said movable valve bridge. 7. The method of claim 6, wherein the step of providing a lost motion component in said valve bridge further comprises providing at least two pistons slidably disposed in said movable valve bridge. 8. A method of selectively actuating an engine valve to produce an engine valve event, said method comprising the steps of: providing motion imparting means in selective contact with a rocker arm pivotally mounted on a rocker shaft;providing a valve bridge in contact with said rocker arm;providing an engine valve in contact with said valve bridge;providing a lost motion component in said valve bridge;selectively supplying hydraulic fluid to the lost motion component; andcontrolling the amount of motion imparted to the engine valve responsive to the supply of hydraulic fluid to the lost motion component. 9. The method of claim 8, wherein the step of providing a lost motion component in said valve bridge further comprises providing a piston slidably disposed in said movable valve bridge. 10. The method of claim 8, wherein the step of providing a lost motion component in said valve bridge further comprises providing at least two pistons slidably disposed in said movable valve bridge. 11. The method of claim 8, wherein the step of providing a lost motion component in said valve bridge further comprises providing at least three pistons slidably disposed in said movable valve bridge. 12. The method of claim 8, further comprising providing an adjustable screw assembly in a first end of said rocker arm. 13. The method of claim 12, further comprising providing a swivel foot at one end of said screw assembly, said swivel foot contacting said first piston. 14. The method of claim 8, further comprising the step of releasing hydraulic fluid from the valve bridge to thereby modify the engine valve event. 15. The method of claim 14, wherein the engine valve event comprises a main exhaust event. 16. The method of claim 14, wherein the engine valve event comprises a main intake event. 17. The method of claim 14, wherein the engine valve event comprises a compression release braking event. 18. The method of claim 14, wherein the engine valve event comprises a bleeder braking event. 19. The method of claim 14, wherein the engine valve event comprises a exhaust gas recirculation event.