Dosing module for use in aftertreatment systems for internal combustion engines

A dosing module for an aftertreatment system, the dosing module comprising:

• a housing that mounts to a structure;
• a replaceable dosing cartridge inserted within the housing, the dosing cartridge comprising a needle assembly;
• a cover removably coupled to the housing, the cover covering the dosing cartridge;
• an inlet port inserted within the housing and being separate from the cover, the inlet port configured to receive reductant and provide the reductant to the dosing cartridge;
• and
• an outlet port inserted within the housing and being separate from the cover, the outlet port having an inner end located inside the housing, an outer end located outside the housing and the cover, and a longitudinal channel extending from the inner end to the outer end, the outlet port configured to receive the reductant from the dosing cartridge and provide the reductant from the dosing module;
• wherein the dosing cartridge and the housing are structured such that the reductant is capable of flowing within an interstice between the dosing cartridge and the housing;
• wherein the dosing module is configured to be controlled between an operation mode and a non-operation mode;
• and
• wherein the dosing module, in the operation mode, is configured to selectively cause the needle assembly to dose the reductant from the dosing module.