Dosing module for introducing reducing agent into exhaust gas treatment system of internal combustion engine, has passive valve for controlling flow of cooling medium through channels based on dosing module temperature

摘要

The dosing module (18) has a cooling structure provided with the channels (36) for flow of cooling medium such as cooling water. The cooling structure is provided with a passive valve for controlling the flow rate of the cooling medium through the channels based on dosing module temperature. The passive valve is arranged in an inlet (32) and outlet (34) of the cooling medium.