Configurable aftertreatment systems including a housing

An aftertreatment system for treating constituents of an exhaust gas, comprising:

• a housing defining at least a first internal volume and a second internal volume that is fluidly isolated from the first internal volume;
• a first aftertreatment leg extending from the first internal volume to the second internal volume, the first aftertreatment leg comprising:
• a temperature control aftertreatment component extending along a first axis and configured to receive at least a portion of the exhaust gas via an inlet conduit fluidly coupled to the temperature control aftertreatment component, and
• an oxidation catalyst disposed downstream of the temperature control aftertreatment component and axially aligned with the temperature control aftertreatment component, an outlet of the oxidation catalyst being disposed in the second internal volume;
• a second aftertreatment leg extending from the second internal volume to the first internal volume, the second aftertreatment leg comprising:
• a filter extending along a second axis that is offset from the first axis, the filter configured to receive the exhaust gas from the oxidation catalyst through the second internal volume, an outlet of the filter disposed within the first internal volume and configured to emit exhaust gas into the first internal volume after passing through the filter;
• a third aftertreatment leg extending from the first internal volume to the second internal volume, the third aftertreatment leg comprising:
• at least one selective catalytic reduction (SCR) catalyst disposed in at least the first internal volume and extending along a SCR axis that is offset from the first axis and the second axis, an inlet of the at least one SCR catalyst being disposed in the second internal volume;
• a decomposition tube extending from the first internal volume to the second internal volume along an axis that is offset from each of the first and second axis, an inlet of the decomposition tube being disposed in the first internal volume such that the decomposition tube is configured to receive the exhaust gas emitted into the first internal volume, and to communicate the exhaust gas from the first internal volume to the inlet of the at least one SCR catalyst in the second internal volume;
• and
• a reductant injection inlet proximate to the inlet of the decomposition tube and configured to allow reductant to be injected into the decomposition tube.