| 摘要 |
PROBLEM TO BE SOLVED: To provide an integral engine valve actuation system capable of ensuring low cost, improving performance and reliability, and yet avoiding providing space or packaging challenges.SOLUTION: In controlling valve motions of an internal combustion engine, after determining that engine braking operation has been initiated, a deactivation mechanism disposed within a main valve train is activated, thereby disabling conveyance of main valve events from a main valve motion source to a valve via the main valve train. Engine braking valve events are enabled for the valve, which may include two-stroke engine braking. Coupling mechanisms, including one-way coupling mechanisms, between adjacent rocker arms may be used in this manner. |
