Aftertreatment module

A machine, comprising:

• a combustion engine;
• and
• an aftertreatment module connected to the combustion engine, the aftertreatment module comprising:
• a housing;
• an inlet chamber into which exhaust gas from the combustion engine is to flow into the housing via an inlet;
• an outlet chamber from which the exhaust gas is to flow from the housing via an outlet;
• wherein the inlet and the outlet are located on opposite sides of the housing and at opposite ends of the housing from each other;
• a set of catalysts via which the exhaust gas is to flow from the inlet chamber to the outlet chamber,
• wherein the set of catalysts is mounted to a mounting plate within the housing that separates the inlet chamber from the outlet chamber, and
• wherein the inlet chamber is between the mounting plate and the inlet;
• and
• a diffuser plate within the inlet chamber that forms a lower portion of the inlet chamber and an upper portion of the inlet chamber,
• wherein the diffuser plate is to diffuse the exhaust gas through the lower portion of the inlet chamber from a first end of the housing at which the inlet is located toward a second end of the housing at which the outlet is located.

An exhaust gas aftertreatment system, comprising:

• an inlet module mechanically connected to a combustion engine of a machine to receive exhaust gas from the combustion engine;
• and
• an aftertreatment module mechanically connected to the inlet module to receive the exhaust gas from the inlet module, the aftertreatment module comprising:
• a housing;
• a mounting plate within the housing that forms an inlet chamber on a bottom side of the mounting plate and an outlet chamber on a top side of the mounting plate;
• an inlet through a bottom plate of the housing for exhaust gas to flow to the inlet chamber from the inlet module,
• wherein the inlet chamber is between the mounting plate and the inlet;
• an outlet through a top plate of the housing for the exhaust gas to flow from the outlet chamber,
• wherein the inlet and the outlet are located on opposite sides of the housing and at opposite ends of the housing from each other;
• a set of catalysts mounted to the mounting plate to facilitate flow of the exhaust gas from the inlet chamber to the outlet chamber;
• and
• a diffuser plate within the inlet chamber that forms a lower portion of the inlet chamber and an upper portion of the inlet chamber,
• wherein the diffuser plate is to diffuse the exhaust gas through the lower portion of the inlet chamber to diffuse the exhaust gas across an area of the set of catalysts.