CPC F01N 3/2066 (2013.01) [F01N 3/2892 (2013.01); F01N 2240/20 (2013.01); F01N 2260/20 (2013.01); F01N 2510/02 (2013.01); F01N 2510/08 (2013.01); F01N 2530/02 (2013.01); F01N 2530/04 (2013.01); F01N 2610/02 (2013.01); F01N 2610/14 (2013.01); F01N 2610/1453 (2013.01); F01N 2900/1806 (2013.01)] | 16 Claims |
1. A shield for a diesel exhaust fluid injector mounted horizontally in an opening in a side wall of an exhaust gas aftertreatment system of an internal combustion engine, the diesel exhaust fluid injector configured to inject diesel exhaust fluid in a direction generally normal to the side wall into a mixer positioned in an exhaust gas stream such that exhaust gas flows in a substantially vertical direction through a housing of the exhaust gas aftertreatment system, the shield comprising:
a first portion extending axially and configured to be coaxial with the diesel exhaust fluid injector between the side wall of the exhaust gas aftertreatment system and the diesel exhaust fluid injector;
a second portion extending radially inwardly from the first portion and configured to contact and at least partially cover an annular region of an injector face extending radially at an injection end of the diesel exhaust fluid injector; and
a drip lip extending axially away from the second portion and configured to direct diesel exhaust fluid away from the injector face and into the exhaust gas stream.
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