Turbocharged internal combustion engine with turbine bypass

An engine system includes an internal combustion engine, at least one turbocharger, and a catalytic treatment device. The engine includes an exhaust manifold system having a main exhaust manifold anda bypass exhaust manifold. A partial-engine bypass valve system is positioned between the engine and the exhaust manifold system. The bypass valve system when placed in a non-bypass position directs all of the engine exhaust gases to the turbine wheel of the turbocharger, and after passing through the turbine wheel the gases proceed to the catalytic device. In a bypass position of the bypass valvesystem, a bypass portion of the total exhaust gases is made to bypass the turbine wheel and proceed to the catalytic device, while the remainder first passes through the turbine wheel before going tothe catalytic device. 一种发动机系统包括内燃发动机、至少一个涡轮增压器和催化处理设备。所述发动机包括排气歧管系统，所述排气歧管系统具有主排气歧管和旁通排气歧管。部分发动机旁通阀系统定位在所述发动机和所述排气歧管系统之间。所述旁通阀系统当放置在非旁通位置中时将所有发动机排气引导到所述涡轮增压器的涡轮机叶轮，并且在通过所述涡轮机叶轮之后，所述气体继续行进到所述催化设备。在所述旁通阀系统的旁通位置中，使总排气的旁通部分旁通所述涡轮机