| 摘要 |
<p>An improved camshaft forming a type of valve timing system that can be used with all the four cycle combustion internal engines, the so-called Otto engines, in which each of the cams extends in an identical one, symmetrical and positioned at 180 degrees with relation to the former, resulting that the number of cams is twice the number of cams foreseen in a conventional shaft, and the number of revolutions is half of the required ones for the latter to get the same purpose.</p> |
