Patent ID: 9664081
Date: 2017-05-30
CPC Classifications: B01D,F01N,Y02A,Y02T

Claim:
1. A reducing agent injection apparatus for use in ai exhaust system with a catalytic converter, the apparatus comprising an exhaust pipe formed to include an exhaust passageway adapted to conduct an exhaust gas to the catalytic converter and formed to include a side aperture opening into the exhaust passageway, a feed connector arranged to extend through the side aperture into the exhaust passageway of the exhaust pipe, the feed connector upstream of the catalytic converter and formed to include (i) an inlet end formed to include an inlet aperture adapted to receive a flow of reducing agent comprising an aqueous urea solution, (ii) an outlet end, and (iii) an inner surface arranged to extend from the inlet end to the outlet end to define a feed-connector channel extending from the inlet end to the outlet end, and a guide member arranged in the feed-connector channel and configured to communicate the flow of reducing agent passing through the inlet aperture of the feed connector into the exhaust passageway via a reducing-agent passageway to combine at a downstream site in the exhaust passageway with exhaust gas flowing through the exhaust passageway in a downstream direction toward the catalytic converter, wherein the guide member includes an inner surface arranged to define the reducing-agent passageway and an outer surface arranged to cooperate with a surrounding portion of an inner surface of the feed connector to define therebetween a gap configured to conduct a flow of exhaust gas admitted from an upstream site in the exhaust passageway to swirl around the outer surface of the guide member and enter the reducing-agent passageway.