The invention discloses a high-pressure
exhaust gas medium-pressure side introduction
system based on a two-stage
turbocharger. The high-pressure
exhaust gas medium-pressure side introduction
system comprises an engine, a high-pressure stage
turbocharger and a low-pressure stage
turbocharger, wherein the engine is connected with an intake manifold and an
exhaust manifold; the high-pressure stage turbocharger comprises a high-pressure stage
exhaust gas turbine and a high-pressure stage
gas compressor, and the low-pressure stage turbocharger comprises a low-pressure stage exhaust gas
turbine anda low-pressure stage
gas compressor; the intake manifold is connected with an intake pipeline, and the
exhaust manifold is connected with an exhaust pipeline; the intake pipeline is provided with thelow-pressure stage
gas compressor, the high-pressure stage gas compressor and an intake
intercooler, and the exhaust pipeline is provided with the high-pressure stage exhaust gas
turbine, the low-pressure stage exhaust gas turbine, a postprocessor and a
back pressure valve; a high-pressure EGR pipeline is connected between an inlet of the high-pressure stage exhaust gas turbine and an inlet of the high-pressure stage gas compressor; and the high-pressure EGR pipeline is provided with an EGR cooler, an EGR valve and a particulate matter catcher. The high-pressure exhaust gas medium-pressure side introduction
system can expand the introduction range of EGR rate, have a high
transient response speed, improve the efficiency of the engine, and reduce the emission.