Exhaust System with Exhaust Gas Recirculation and Multiple Turbochargers, and Method for Operating Same

摘要

An exhaust system includes a first turbine having an inlet that is fluidly coupled to an exhaust conduit; a valve assembly having an inlet port, a first outlet port, and a second outlet port, the inlet port of the valve assembly being in fluid communication with the exhaust conduit; a second turbine having an inlet that is fluidly coupled to the first outlet port of the valve assembly via a first outlet port conduit, and fluidly coupled to an outlet of the first turbine via a first turbine outlet conduit; and a controller operatively coupled to the valve assembly. The valve assembly has a first configuration that blocks fluid communication between the inlet port and the first outlet port, and the valve assembly has a second configuration that effects fluid communication between the inlet port and the first outlet port.

主权项

1. An exhaust system, comprising:
an exhaust conduit configured to receive a flow of exhaust gas from an internal combustion engine; a first turbine having an inlet that is fluidly coupled to the exhaust conduit; a first compressor operatively coupled to the first turbine via a first shaft; a valve assembly having an inlet port, a first outlet port, and a second outlet port, the inlet port of the valve assembly being in fluid communication with the exhaust conduit via an exhaust bypass conduit,
the valve assembly having a first configuration that blocks fluid communication between the inlet port and the first outlet port,the valve assembly having a second configuration that effects fluid communication between the inlet port and the first outlet port; a second turbine having an inlet that is fluidly coupled to the first outlet port of the valve assembly via a first outlet port conduit, and fluidly coupled to an outlet of the first turbine via a first turbine outlet conduit, the first turbine outlet conduit being distinct from the first outlet port conduit; and a controller operatively coupled to the valve assembly, the controller being configured to effect simultaneous fluid communication
between the inlet of the second turbine and the outlet of the first turbine via the first turbine outlet conduit, andbetween the inlet of the second turbine and the first outlet port of the valve assembly via the first outlet port conduit,by actuating the valve assembly to the second configuration.