Abstract: A burner (18) is provided for use in a diesel exhaust gas treatment system (10) to treat an exhaust flow (12) from a diesel combustion process (14). The burner (18) includes an inner housing (34) defining a combustion flow path (40) to direct a first portion of the exhaust flow (12) through an ignition zone (42) wherein fuel is ignited, an outer housing (32) surrounding the inner housing (34) to define an annular bypass flow path (44) between the inner and outer housings (34, 32) to bypass a second portion of the exhaust flow (12) around the ignition zone (42), and a mixer (48) including a plurality of flow restrictor fingers (50) that extend across the bypass flow path (44) to restrict an available flow area of the bypass flow path (44), and a plurality of mixer fingers (52) having portions that extend inwardly from a location downstream from the inner housing (34).

Abstract: A burner (18) is provided for use in a diesel exhaust gas treatment system (10) to treat an exhaust flow (12) from a diesel combustion process (14). The burner (18) includes an inner housing (34) defining a combustion flow path (40) to direct a first portion of the exhaust flow (12) through an ignition zone (42) wherein fuel is ignited, an outer housing (32) surrounding the inner housing (34) to define an annular bypass flow path (44) between the inner and outer housings (34, 32) to bypass a second portion of the exhaust flow (12) around the ignition zone (42), and a mixer (48) including a plurality of flow restrictor fingers (50) that extend across the bypass flow path (44) to restrict an available flow area of the bypass flow path (44), and a plurality of mixer fingers (52) having portions that extend inwardly from a location downstream from the inner housing (34).