Systems and methods for an engine with a two-stage turbocharger

摘要

In one example, the system includes a two-stage turbocharger which has first turbocharger (220) with a first turbine (222) and a first compressor (224) and a second turbocharger (226) with a second turbine (228) and a second compressor (230), where the first turbine and the second turbine are arranged in parallel and the first compressor and the second compressor are arranged in series. The system may include a duct (218) coupling turbine inlets (214, 216) of the first and second turbine, and a valve (236) coupled between the duct and the inlet of the first turbine to throttle flow to first turbine.