| 摘要 |
<p>PURPOSE:To self-amend unbalance of lift volume of a valve between air cylinders, by receiving the end portion of the floating side of a lever which supports the back side of a rocker arm with an oil pressure actuator and a control cam. CONSTITUTION:In a lever 3 which constitutes an oscillation fulcrum of a rocker arm by supporting the back side of the rocker arm 2, one end on valve stem 8 side thereof is supported by an adjusting screw 24 of a bracket 4, and the end portion on its floating side is supported by a hydraulic actuator 5 and a control cam 6. The control cam 6 is arranged on a supporting axis which is arranged commonly to plural air cylinders, and it is urged by a spring in the direction to support the lever 3. When any unbalance occurs in a lift between air cylinders due to the reason such that there is difference between leak volumes of the hydraulic actuators 5, distribution of load on the actuators 5 andthe cams 6 changes, thus every cam 6 oscillates in such a way that it always makes contact to the lever 3, and the difference is self-amended.</p> |
