| 摘要 |
<p>An internal combustion engine, preferably diesel, has a drive shaft x with at least three pairs of cylinders typically (36, 39 and 37, 40 and 38, 41). The number of pairs of cylinders may be any prime number above two. The cylinders of each pair lie diametrically opposite the drive shaft (11) and the pairs of cylinders are equally spaced about the drive shaft. Each cylinder has two pistons typically (13a and 13b) contained therein, with the pistons facing each other and piston rods of the pistons are coupled to the drive shaft through respective opposed cams (12). The profiles of the cams are shaped such that the combined inertia forces of all the pistons in all of the cylinders produces no net axial force on the drive shaft thereby reducing vibration and noise.</p> |
