| 摘要 |
An auxiliary valve actuating mechanism of an engine is provided. The engine includes a conventional valve actuating mechanism (200) and an auxiliary valve actuating mechanism (2002). The auxiliary valve actuating mechanism (2002) includes an auxiliary cam (2302), an auxiliary rocker-arm shaft (2052), an auxiliary rocker arm (2102), an eccentric rocker-arm shaft bush (188) and a shaft bush actuating mechanism (100). The eccentric rocker-arm shaft bush (188) is provided inside the shaft hole of the auxiliary rocker arm (2102). The auxiliary rocker-arm shaft (2052) is provided inside the eccentric rocker-arm shaft bush (188). The shaft center of the auxiliary rocker-arm shaft (2052) is biased from the shaft center of the eccentric rocker-arm shaft bush (188). One end of the auxiliary rocker arm (2102) constitutes a motion pair with an auxiliary cam (2302), and the other end is above the valve (300). The shaft bush actuating mechanism (100) actuates the eccentric rocker-arm shaft bush (188) to rotate between an operating position and a non-operating position. At the non-operating position, the rocking center line of the auxiliary rocker arm (2102) is away from the valve (300), and the auxiliary rocker arm (2102) is separated from the valve; and at the operating position, the rocking center line of the auxiliary rocker arm (2102) is close to the valve, the auxiliary rocker arm contacts with the valve, and the movement of the auxiliary cam is transmitted to the valve to generate the motion of the auxiliary valve. The auxiliary valve actuating mechanism is simple in structure, and easy to mount. |
