Patent ID: 8033104

Claim:
A selective catalytic reduction (SCR) injection system for mixing reductant with exhaust gasses, comprising: a plate disposed between walls of an entrance portion of an exhaust pipe, such plate separating such entrance section of the exhaust pipe from an egress section of the exhaust pipe; a reductant-introducing conduit having perforations in sidewalls thereof and having an outlet disposed in the egress section of the exhaust pipe; and wherein: the plate has perforations in a portion of the plate between the reductant-introducing conduit and a inner wall portion of the exhaust pipe; and wherein a first portion of exhaust gasses in the entrance section of the exhaust pipe pass through the perforations in the sidewalls of the reductant-introducing conduit into the reductant-introducing conduit and then exit the outlet of the reductant-introducing conduit into the egress section of the exhaust pipe; and wherein a second portions of the exhaust gasses in the entrance section of the exhaust pipe pass through the perforations in the plate and enter into the egress section of the exhaust pipe.