| 摘要 |
A two-step various valve lift system is provided to improve engine efficiency by controlling the amount of air-fuel mixture and exhaust gas in accordance with an engine condition. A two-step various valve lift system includes a high cam(11), a low cam(12), a high body(14), a low body(15), a return unit, a press unit, and a joint unit. The high cam and the low cam are eccentrically fitted to a cam shaft(10). The high body is pressed by the rotation of the high cam. The low body has an intermediate portion with a cut-out(16) for fitting of the high body, and a rear portion hinged to a rocker arm(17) coaxially with the high body. The return unit is arranged beneath the low body so as to support the low body. The press unit is arranged at a front end of the low body so as to press a valve(13). The joint unit moves the high body integrally with the low body during a high lifting. |
