Mixer for a vehicle exhaust system

A vehicle exhaust system comprising:

• an exhaust component having an inner wall to define an internal cavity that provides an engine exhaust gas flow path from an inlet to an outlet;
• an injector that is configured to spray a fluid into the internal cavity to mix with engine exhaust gas;
• and
• an inlet baffle mounted to the exhaust component adjacent the inlet, wherein the inlet baffle includes at least one scoop having a scoop length that is greater than a scoop width, and wherein the at least one scoop includes a scoop opening that directs engine exhaust gas toward the inner wall of the internal cavity at a location that is upstream of injector spray, wherein the at least one scoop comprises at least a first scoop and a second scoop, wherein the first scoop is positioned to extend along an outer peripheral edge of the inlet baffle with the first scoop being curved in a direction extending along the scoop length and having a first scoop opening that directs engine exhaust gas toward the inner wall of the internal cavity, and wherein the second scoop is positioned adjacent a central location of the inlet baffle and has a second scoop opening that directs engine exhaust gas in a direction toward the first scoop.

A mixer for a vehicle exhaust system comprising:

• an outer housing;
• an inner housing spaced radially inward of the outer housing to define a gap, the inner housing having an inner wall to define an internal cavity that provides an engine exhaust gas flow path from an inlet to an outlet;
• an injector that is configured to spray a fluid into the internal cavity to mix with engine exhaust gas;
• an inlet baffle adjacent the inlet, wherein the inlet baffle includes at least a first scoop and a second scoop each having a scoop length that is greater than a scoop width, and wherein the first scoop includes a first scoop opening that directs engine exhaust gas toward the inner wall of the internal cavity, and the second scoop includes a second scoop opening that directs engine exhaust gas in a direction toward the first scoop, and wherein at least one of the first and second scoops is curved in a direction extending along the scoop length, and wherein each of the first and second scoops comprise a recessed portion that extends inwardly from an upstream surface of the inlet baffle with the recessed portion including first and second sides connected to each other via a base;
• and
• an outlet baffle having a primary opening through which a majority of a mixture of engine exhaust gas and spray exits the internal cavity via the outlet, and a plurality of secondary openings that are smaller than the primary opening.

A mixer for a vehicle exhaust system comprising:

• an outer housing;
• an inner housing spaced radially inward of the outer housing to define a gap, the inner housing having an inner wall to define an internal cavity that provides an engine exhaust gas flow path from an inlet to an outlet;
• an injector that is configured to spray a fluid into the internal cavity to mix with engine exhaust gas;
• an inlet baffle adjacent the inlet, wherein the inlet baffle includes at least a first scoop and a second scoop each having a scoop length that is greater than a scoop width, and wherein the first scoop includes a first scoop opening that directs engine exhaust gas toward the inner wall of the internal cavity, and the second scoop includes a second scoop opening that directs engine exhaust gas in a direction toward the first scoop;
• and
• an outlet baffle having a primary opening through which a majority of a mixture of engine exhaust gas and spray exits the internal cavity via the outlet, and a plurality of secondary openings that are smaller than the primary opening, and wherein the inlet baffle includes a plurality of secondary openings located circumferentially between the first scoop opening and an end of the second scoop that is opposite the second scoop opening, and wherein the inlet baffle includes a plurality of slots that direct engine exhaust gas into the gap between the inner and outer housings.