Aftertreatment Injector Anti-Fouling Device
AssigneeMack Trucks, Inc.
InventorsBruno Gaudin, Philip Meier
Life of this patent
Estimating the term…
Abstract
An anti-fouling device for an internal combustion engine aftertreatment injector includes a member mountable as an interface between an exhaust conduit and the aftertreatment injector. The member has an inlet to receive air from an air source, and is formed with a passageway to guide the received air to at least one outlet to direct the air to a nozzle of the injector. The air flow surrounds the nozzle to prevent or inhibit exhaust gas from the exhaust conduit from contacting the nozzle.
Claims12
An anti-fouling device for an exhaust aftertreatment injector of an internal combustion engine, comprising:
- a member positionable between an opening on an exhaust conduit and an injector, the member being plate shaped and having a bore for alignment with a nozzle of the injector and the opening on the exhaust conduit to allow a flow from the nozzle through the bore into the opening on the exhaust conduit, the member having an inlet for receiving air from an air source, and having a passageway formed therein to guide air from the inlet to at least one outlet opening on a surface bounding the bore, the at least one outlet being oriented to direct air to the nozzle.
An exhaust aftertreatment injector for an internal combustion engine having an opening on an exhaust conduit with an anti-fouling device, comprising:
- an injector mountable on the opening of an exhaust conduit, the injector having a nozzle directed into the opening;
- and,
- a plate member positionable between the opening on an exhaust conduit and the injector, the plate having a bore for alignment with the nozzle of the injector to allow a flow from the nozzle through the bore into the opening on the exhaust conduit, an upper portion of the bore defining a flow space surrounding the nozzle, the plate member having an inlet for receiving air from an air source and having a passageway formed therein to guide air from the inlet to at least one outlet opening, the at least one outlet being oriented to direct air into the flow space around the nozzle.
Dependencies are inferred from the claim text.