Single module integrated aftertreatment module

An aftertreatment system configured to receive exhaust from an engine, the aftertreatment system including:

• a housing defining a centerline axis, the housing including one or more deflector plates at an inlet of the housing so as to deflect flow outwardly from the inlet;
• a diesel particulate filter disposed downstream of the one or more deflector plates within the housing and having a diesel particulate filter center axis aligned with the centerline axis;
• a selective catalytic reduction catalyst disposed within the housing downstream of the diesel particulate filter and having a center axis aligned with the centerline axis;
• a decomposition chamber disposed within the housing downstream of the diesel particulate filter and upstream of the selective catalytic reduction catalyst;
• and
• a reductant delivery system configured to dose reductant into the decomposition chamber.

A system comprising:

• a main housing defining a volume and having an upstream end and a downstream end;
• a first inner housing housed within the main housing and having an inlet at a first end of the first inner housing and an outlet at a second end of the first inner housing, the outlet of the first inner housing being in fluid communication with the volume defined by the main housing, the first inner housing defining a first centerline axis;
• a second inner housing housed within the main housing and having an inlet at a first end of the second inner housing and an outlet at a second end of the second inner housing, the inlet of the second inner housing being in fluid communication with the volume defined by the main housing, the second inner housing defining a second centerline axis that is parallel to and offset from the first centerline axis;
• a diesel particulate filter disposed within the first inner housing and having a diesel particulate filter center axis aligned with the first centerline axis;
• and
• a selective catalytic reduction catalyst disposed within the second inner housing downstream of the diesel particulate filter and having a center axis aligned with the second centerline axis;
• wherein the first end of the first inner housing and the first end of the second inner housing are positioned within the main housing at the upstream end of the main housing.