Internal combustion engine with turbocharger, supercharger and supercharger bypass

摘要

Disclosed is an engine system including a compression ignition internal combustion engine, a turbocharger 34 having a turbocharger turbine 60 coupled to a turbocharger compressor 62 and an electric supercharger 32 having an electric motor 64 coupled to a supercharger compressor 66. The supercharger and the turbo charger are arranged in series such that air from the supercharger compressor flows to the turbocharger compressor before passing to the engine intake manifold. A bypass conduit 76 is provided to so that intake air may bypass the supercharger. This allows air to be compressed by both the turbocharger and the supercharger compressors when a high engine output is required and by the turbocharger compressor alone when a high output is not required.