| 主权项 |
1. An internal combustion engine, comprising:
a camshaft including a first cam; a control shaft including a second cam; a valve; and a valve actuation system adapted to be driven by the first cam and the second cam, the valve actuation system including: an intermediate arm adapted to oscillate by the action of the first cam about a first pin, the intermediate arm including a third cam formed on an end thereof and a first roller located on a second pin; a first rocker arm rotatably positioned on the control shaft and including a foot at a first end that causes movement of the valve by the action of the first cam, and a second roller at a second end opposite the first end, wherein the second roller is adapted to rotate about a third pin and the second roller is adapted to engage the third cam; and a control arm adapted to rotate about the first pin and including a third roller in contact with the second cam such that a profile of the second cam causes the control arm to pivot about the third pin, forcing the intermediate arm to move, moving the third cam with respect to the second roller, thereby causing the first rocker arm to rotate about the control shaft and to change the amount the valve moves. |
