SUPERCHARGER-EQUIPPED INTERNAL COMBUSTION ENGINE

摘要

A supercharger-equipped internal combustion engine in the present invention includes a turbo-supercharger (20) which includes, at some point in an intake passage (26), a centrifugal compressor (20b) having an impeller section (20b4) for housing a compressor impeller (20b3). In the supercharger-equipped internal combustion engine, EGR gas and blow-by gas are introduced into an intake system in such a way as to flow into the centrifugal compressor (20b) via an EGR gas introduction section (40a) and a blow-by gas introduction section (48a). The supercharger-equipped internal combustion engine further includes a partition wall (52) which guides the EGR gas and the blow-by gas toward the centrifugal compressor (20b) so that the EGR gas and the blow-by gas are not mixed with each other until the EGR gas and the blow-by gas enter into the impeller section (20b4).

主权项

1. A supercharger-equipped internal combustion engine, comprising:
a supercharger which includes, at some point in an intake passage, a centrifugal compressor having an impeller section for housing a compressor impeller; an exhaust gas recirculation passage which includes an exhaust gas recirculation introduction section connected with the intake passage and through which recirculated exhaust gas flows; and a blow-by gas passage which includes a blow-by gas introduction section connected with the intake passage and through which blow-by gas flows, wherein the recirculated exhaust gas and the blow-by gas are introduced to an intake system in such a manner as to flow into the centrifugal compressor via the exhaust gas recirculation introduction section and the blow-by gas introduction section, and wherein the supercharger-equipped internal combustion engine further comprises a gas guide member which guides the recirculated exhaust gas and the blow-by gas toward the centrifugal compressor so that the recirculated exhaust gas and the blow-by gas are not mixed with each other until the recirculated exhaust gas and the blow-by gas enter into the impeller section of the centrifugal compressor.