Patent ID: 8869518

Claim:
A burner for use in a diesel exhaust gas treatment system to treat an exhaust flow from a diesel combustion process, the burner comprising: an inner housing defining a combustion flow path to direct a first portion of the exhaust flow through an ignition zone wherein fuel is ignited; an outer housing surrounding the inner housing to define a bypass flow path between the inner and outer housings to bypass a second portion of the exhaust flow around the ignition zone; and a mixing zone downstream of the combustion flow path and the bypass flow path to receive the first and second portions of the exhaust flow therefrom; and a mixer including a plurality of flow restrictor fingers that extend inwardly from the outer housing and across the bypass flow path to restrict an available flow area of the bypass flow path and a plurality of mixer fingers that extend inwardly from the outer housing into the mixing zone to be impinged against by both the first and second portions of the exhaust flow exiting the bypass flow path and the combustion flow path.