| 摘要 |
<p>PURPOSE: To prevent the jump of a valve and change the timing of the valve by controlling the movement of a inlet valve via a valve lever with a link mechanism in desmodoro operation. CONSTITUTION: A valve lever 20 provided with a follow-up passage 25 has one end mounted on a pivotal shat 21 and the other end engaged with the valve stem 14 of an inlet valve 11. A first link 30 mounted on a fixed pivotal shaft 31 and a middle link 45 mounted on a pivotal shaft 46 are connected to each other via a driving pin 32. A second link 40 mounted on a movable pivotal shaft 41 and a driving link 52 mounted on a crank 51 are connected each other via the pivotal shaft 46. When the crank 51 is rotated with a crank shaft 50, the driving pin 32 is reciprocated in the follow-up passage 25 with the rotation of the pivotal shaft 46 and the valve lever 20 is then oscillated to open/close the inlet valve 11. The movable pivotal shaft 41 is moved by a pivotal shaft moving device 55 to allow a variable opening/closing timing of the inlet valve 11.</p> |
