Dosing module for exhaust post treatment system of vehicle

Abstract

A dosing module for an exhaust gas post treatment system of a vehicle, which may be used to inject a reducing agent along a flow direction of exhaust gas at a front side of a selective catalyst reduction (SCR) unit, may include a dosing main body having a connection portion that may be connected to the SCR unit and an inflow portion into which the exhaust gas flows, an injector that may be disposed at a boss portion that may be mounted on the dosing main body to inject the reducing agent into the dosing main body, and a guide member that may be disposed inside the dosing main body to guide the exhaust gas flowing into the dosing main body along a predetermined route.

1 . A dosing module for an exhaust gas post treatment system of a vehicle, which is used to inject a reducing agent along a flow direction of exhaust gas at a front side of a selective catalyst reduction (SCR) unit, comprising:
 a dosing main body having a connection portion that is connected to the SCR unit and an inflow portion into which the exhaust gas flows;   an injector that is disposed at a boss portion that is mounted on the dosing main body to inject the reducing agent into the dosing main body; and   a guide member that is disposed inside the dosing main body to guide the exhaust gas flowing into the dosing main body along a predetermined route.   
     
     
         2 . The dosing module for the exhaust gas post treatment system of  claim 1 , wherein the guide member has a plate shape to separate the connection portion from the inflow portion in the dosing main body. 
     
     
         3 . The dosing module for the exhaust gas post treatment system of  claim 2 , wherein one end of the guide member is fixed to an inside wall of the dosing main body and the other end thereof is bent from the inside wall to have a curved shape. 
     
     
         4 . The dosing module for the exhaust gas post treatment system of  claim 3 , wherein the curved shape is bent toward the injector with a predetermined curvature to enclose the inflow portion therein. 
     
     
         5 . The dosing module for the exhaust gas post treatment system of  claim 1 , wherein the guide member has a plurality of holes. 
     
     
         6 . The dosing module for the exhaust gas post treatment system of  claim 5 , wherein a baffle member is mounted in the dosing main body to be engaged with the guide member and an inside wall of the dosing main body to form the inflow portion. 
     
     
         7 . The dosing module for the exhaust gas post treatment system of  claim 6 , wherein the baffle member has a plate shape except at the inflow portion in the dosing main body. 
     
     
         8 . The dosing module for the exhaust gas post treatment system of  claim 7 , wherein the baffle member forms a flow passage between the guide member and an inside wall of the dosing main body. 
     
     
         9 . The dosing module for the exhaust gas post treatment system of  claim 7 , wherein the baffle member is disposed on a slant toward the inflow portion in the dosing main body. 
     
     
         10 . The dosing module for the exhaust gas post treatment system of  claim 3 , wherein the injector is disposed on a slant along the flow direction of the exhaust gas on the boss member. 
     
     
         11 . The dosing module for the exhaust gas post treatment system of  claim 10 , wherein the injector injects the reducing agent toward the curved portion of the guide member. 
     
     
         12 . The dosing module for the exhaust gas post treatment system of  claim 1 , wherein the connecting portion forms a connecting passage that is connected to the SCR unit at a lower portion of the dosing main body.