| 摘要 |
<p>An internal combustion engine has at least two exhaust valves (2, 3) per cylinder, a first exhaust valve (2) in each cylinder being connected to a first exhaust manifold (4) while a second exhaust valve (3) in each cylinder is connected to a second exhaust manifold (5). The first exhaust valves (2) or their outlet are or is arranged so as to be capable of being kept closed during a selected period of operation of the engine, all exhaust-gas discharge being effected via the second exhaust valves.</p> |
