Nozzle diffuser mixer

An exhaust gas treatment system for an engine, comprising:

• an exhaust gas treatment device;
• a fluid flow control device located upstream from at least a portion of the exhaust gas treatment device, the fluid flow control device including:
• a nozzle disposed within an exhaust conduit, the nozzle including an inlet opening and an outlet opening for forming a first flow path through the nozzle, the nozzle being spaced from the exhaust conduit for forming a second flow path between the nozzle and the exhaust conduit;
• and
• an injector disposed adjacent the nozzle of the fluid flow control device, the injector being oriented to direct a pressurized fluid into the second flow path adjacent to the nozzle;
• wherein, the nozzle defines a first axis and the exhaust conduit, along an axial length where the nozzle is disposed within, defines a second axis, and the first axis and second axis intersect each other.

A method of dispersing an exhaust gas stream within an exhaust gas conduit of an engine, comprising:

• flowing a first portion of the exhaust gas through a nozzle disposed within the exhaust gas conduit to form a first flow path having a first axis, the nozzle including an inlet opening and an outlet opening;
• flowing a second portion of the exhaust gas stream between the nozzle and the exhaust gas conduit to form a second flow path having a second axis;
• injecting pressurized fluid into the second flow path;
• and
• the first portion of the exhaust gas, the second portion of the exhaust gas and the injected fluid combining upon passing the nozzle to form a mixture;
• wherein, along an axial length of the exhaust conduit where the nozzle is disposed within, the first axis of first flow path and the second axis of the second flow path are non-parallel with respect to each other.