| 摘要 |
An internal combustion engine, preferably diesel, has at least two cylinders (10) and two drive shafts (11a, 11b), each cylinder having two opposed pistons (13) therein, with piston heads (13a, 13b) facing each other and piston rods of the pistons are coupled to the drive shaft or shafts through respective opposed cams (12a, 12b) and roller or slider arrangements. The opposed cams are profiled (23) such as to ensure that the opposed pistons are held at the top dead centre position until combustion is substantially complete. The opposed cams are also profiled such as to ensure that each cylinder as scavenged by more than itas own volume of air and such as to ensure that the exhaust ports close before the inlet ports, thereby ensuring that full supercharger or turbocharger pressure is achieved within the cylinder prior to compression. The pistons and rollers or sliders are fitted with lubrication channels to ensure that friction is reduced. |
