| 摘要 |
A large turbocharged two-stroke compression ignited internal combustion engine of the crosshead type with a turbocharger with an exhaust gas driven turbine connected to a compressor for delivering pressurized scavenge air, a plurality of cylinders connected to a scavenge air receiver and to an exhaust gas receiver, a selective catalytic reduction reactor with an inlet connected to an outlet of the exhaust gas receiver, an exhaust conduit connecting an outlet of the selective catalytic reduction reactor to an inlet of the turbine, a scavenge air conduit connecting an outlet of the compressor to an inlet of the scavenge air receiver via a scavenge air cooler, an auxiliary blower in the scavenge air conduit for assisting the compressor at low load conditions of the engine, a controllable by pass conduit extending from a position in the scavenge air conduit to a position in the exhaust conduit for bypassing the plurality of cylinders, an electronically controlled bypass blower for assisting a flow of scavenge air from the scavenge air conduit to the exhaust conduit, and an electronic control unit operably connected to the electronically controlled bypass blower, the electronic control unit being configured control the flow of scavenge air from the scavenge air conduit through the controllable bypass conduit to the exhaust conduit. |
