Patent ID: 8056340

Claim:
A motor-vehicle engine system comprising: an engine having an intake manifold and an exhaust manifold; a turbine configured to receive exhaust from the exhaust manifold; a compressor mechanically coupled to the turbine and configured to supply air to the intake manifold; and an EGR mixer comprising an upstream conduit section having a contracting flow area in a direction of air flow through the mixer, a downstream conduit section having an expanding flow area in the direction of air flow through the mixer, a plurality of circumferentially arranged slots formed in the downstream conduit section for admitting exhaust to the air flow, an abrupt flow-expanding ridge disposed between the upstream and downstream conduit sections downstream of the slots, and an exhaust chamber arranged circumferentially around the upstream and/or downstream conduit sections fluidically coupled between an EGR passage and the slots, wherein the upstream conduit section is coupled to an air cleaner, wherein the downstream conduit section is coupled upstream of the compressor in an intake air-flow direction and wherein the exhaust chamber is coupled downstream of the turbine in an exhaust-flow direction; and wherein the EGR mixer is externally coupled to the intake manifold.