Reduction of fouling in after treatment components
AssigneeInternational Engine Intellectual Property Company, LLC
InventorsMarton L. Gyuro, Scott A. Beatty
Life of this patent
Estimating the term…
Abstract
A device and method for influencing exhaust gas flow downstream of a turbocharger turbine and upstream of after treatment components prevents doser tip fouling by using a passive exhaust flow control surface comprising ridges protruding into the exhaust gas flow conduit. The ridges are disposed parallel to each other, and perpendicular to the direction of gas flow. In one embodiment, a funnel is disposed in the conduit, downstream of the ridges, to further direct the exhaust gas flow more precisely towards a HC doser tip.
Claims17
An active regeneration arrangement for a diesel particulate filter (dpf) comprising:
- a conduit upstream of the dpf;
- a doser mounted to the conduit for injecting hydrocarbon fuel into the conduit;
- and
- at least one protrusion for influencing the flow of exhaust gas in the conduit to decrease fouling of the doser, the protrusion located upstream of the doser in an exhaust gas flow direction and extending into the conduit, the protrusion being disposed along an inner circumferential surface of the conduit such that the protrusion is in contact with the flow of exhaust gas.
The arrangement of clam 1, further comprising a gas flow directing surface disposed downstream of the at least one protrusion.
A method for increasing the velocity of gas in a conduit past a doser in a diesel particulate filter active regeneration arrangement, comprising:
- providing a flow of gas past at least one protrusion disposed within an inner surface of a conduit upstream of the doser.
Dependencies are inferred from the claim text.