| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a variable valve operating system that enables a closing valve timing to be significantly variable than an opening valve timing through a single rocker-arm mechanism. <P>SOLUTION: A variable valve operating system has a first arm 25 supported in a way to allow a free oscillation by a rocker-shaft 11 as a rocker-arm mechanism 19 for opening/closing a valve 5, a second arm 35 driven by a cam 15 and oscillated with the rocker-shaft side serving as a fulcrum, a third arm 45 provided in a way to allow free oscillation at a supporting shaft 13 arranged in the vicinity of the rocker-shaft, and causes a cam phase to be variable through changes in attitudes that the movement of the fulcrum of the second arm brings about to drive the first arm, and a variable mechanism 44 for causing the fulcrum of the second arm to be variable. Also, it is configured such that the supporting shaft 13 supporting the third arm 45 is fixed by fasteners 76, 86 onto a cylinder head 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
