Aftertreatment module having angled catalyst bank

A method of treating exhaust, comprising:

• directing exhaust in a first flow direction into an aftertreatment module;
• dividing the exhaust into multiple flow streams;
• redirecting the multiple flow streams through an oblique angle with respect to the first flow direction;
• catalyzing the redirected exhaust;
• rejoining the catalyzed exhaust into a single flow stream;
• redirecting the single flow stream back into the first flow direction out of the aftertreatment module;
• and
• redirecting the single flow stream in a second flow direction that is substantially perpendicular to the first flow direction after catalyzing the exhaust and before the single flow stream exits the aftertreatment module.

An aftertreatment module, comprising:

• a housing including:
• an inlet configured to direct exhaust in a first flow direction into the aftertreatment module;
• a passage configured to redirect the exhaust in a second flow direction that is substantially perpendicular to the first flow direction;
• and
• an outlet configured to receive the exhaust from the passage and redirect the exhaust back to the first flow direction out of the aftertreatment module;
• and
• a catalyst bank separating the inlet and the outlet, the catalyst bank including:
• a plurality of sleeves disposed in parallel with each other;
• a plurality of catalyst bricks disposed within each of the plurality of sleeves;
• and
• a face disposed at an angle of about 10°-14° with respect to the first flow direction,
• wherein the catalyst bank is a first catalyst bank, and the aftertreatment module further includes a second catalyst bank, the first and second catalyst banks forming a general V-shape pointing toward a center axis of the outlet.