Diesel exhaust fluid injection shield and diesel exhaust fluid injection system
AssigneeDeere & Company
InventorsLuis Mario Chan Perez, Anthony M. Straub, Stephen M. Bonny, Derek A. Weiss, Matthew R. Evers
Life of this patent
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Abstract
A shield for a diesel exhaust fluid injector is mounted in an opening in a side wall of an exhaust gas aftertreatment system of an internal combustion engine. The diesel exhaust fluid injector is configured to inject diesel exhaust fluid in a direction generally normal to the side wall into a mixer positioned in an exhaust gas stream. The shield includes a first portion extending axially and a second portion extending radially inwardly from the first portion.
Claims16
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.
A diesel exhaust fluid injection system for an exhaust gas aftertreatment system for an internal combustion engine having an exhaust gas stream flowing substantially vertically through a housing of the exhaust gas aftertreatment system, the diesel exhaust fluid injection system comprising:
- a diesel exhaust fluid injector, having an injector face extending radially at an injection end of the diesel exhaust fluid injector, and mounted horizontally in an opening in a side wall of the exhaust gas aftertreatment system and configured such that diesel exhaust fluid is injected in a direction generally normal to the side wall into a mixer positioned in the exhaust gas stream;
- and
- a shield extending radially inwardly and contacting and at least partially covering an annular region of the injector face at a location axially inside of the side wall of the exhaust gas aftertreatment system,
- wherein the shield includes a drip lip extending away from the injector face and into the exhaust gas stream and configured to direct diesel exhaust fluid away from the injector face and into the exhaust gas stream.
Dependencies are inferred from the claim text.