| 摘要 |
An internal combustion engine has two exhaust valves, 24 and 25, per combustion chamber 21, and variable valve timing for each exhaust valve. The exhaust valves are associated with respective exhaust tracts, 26 and 27, including a turbocompounder 31 and a turbocharger 41. The turbine exhaust from one of the turbomachines is directed to turbine inlet of another of the turbomachines. Both or either of the turbo machines may have an exhaust gas bypass fitted, 45 and 49, controlled by respective bypass valves, 46 and 50. The engine may comprise three turbomachines. The engine improves the arrangement of exhaust powered turbomachines without causing a detrimental effect on the efficient operation of the engine. |
