Patent ID: 7743756

Claim:
An air inlet system for an internal combustion engine, comprising: an inlet duct for furnishing charge air to engine cylinders; a combination port formed in said inlet duct for inducting both recirculated exhaust gas and charge air into an engine; an EGR injector mounted within said combination port, with said EGR injector comprising: a central EGR supply passage extending generally parallel to the direction of said charge air entering said combination port; and a flow director mounted at a downstream end of said EGR supply passage and, in combination with said EGR supply passage, defining an annular EGR discharge orifice; and a flow guide mounted upstream from said flow director, with said flow guide comprising: a generally ogive-shaped projection for causing charge air to move smoothly around said flow director; and a swirl generator comprising a plurality of radially directed vanes, with each of said vanes having at least a first end joined to said generally ogive-shaped projection, with said vanes adapted to impart a swirling motion to charge air flowing through said combination port.