Patent ID: 8276571

Claim:
An exhaust gas re-induction apparatus, comprising: an exhaust gas interface housing including: an oxygen sensor receiver portion structured to receive an oxygen sensor apparatus at a first opening substantially perpendicularly to an axial direction of the exhaust gas interface housing; and an exhaust gas redirection portion that is swivelly coupled to the oxygen sensor receiver portion, and structured to receive an exhaust gas re-circulation conduit apparatus at a second opening substantially perpendicularly to the axial direction of the exhaust gas interface housing; and an oxygen sensor substitute apparatus including an exhaust gas diffusion chamber disposed therein, wherein the exhaust gas interface housing is structured to receive the oxygen sensor substitute apparatus through third and fourth openings along the axial direction of the exhaust gas interface housing; the exhaust gas re-circulation conduit apparatus is coupled to the exhaust gas redirection portion; the oxygen sensor apparatus is coupled to the oxygen sensor receiver portion; and the exhaust gas redirection portion is structured to swivel relative to the oxygen sensor receiver portion so that the exhaust gas re-circulation conduit apparatus is rotatable relative to the oxygen sensor apparatus.