| 摘要 |
It is disclosed an internal combustion engine (110) having a two stage turbocharger (900), the two stage turbocharger (900) comprising a high pressure turbine (250) connected to an exhaust manifold (225) of the engine (110) through a high pressure turbine inlet duct (255) and a low pressure turbine (550) connected to the high pressure turbine (250) through a low pressure turbine inlet duct (555) and to the high pressure turbine inlet duct (255) through a connecting channel (605), said low pressure turbine (550) and said high pressure turbine (250) being arranged in series, the two stage turbocharger (900) being provided with a bypass system (800) comprising a high pressure turbine valve (700) arranged in the high pressure turbine inlet duct (255), a low pressure turbine valve (710) arranged in the connecting channel (605) and an actuator (720) configured to operate the high pressure turbine valve (700) and the low pressure turbine valve (710) to alternatively close the high pressure turbine inlet duct (255) or the connecting channel (605). |
