Cooling system for engine aftertreatment system

Abstract

A cooling system for an engine aftertreatment system at least partially located in an engine compartment including a pressurized air source and an air conduit. The pressurized air source is configured to generate a cooling airflow. The air conduit is connected to the pressurized air source. The air conduit is configured to provide the cooling airflow to the engine aftertreatment system.

1 . A cooling system for an engine aftertreatment system at least partially located inside an engine compartment, the system comprising:
 a pressurized air source configured to generate a cooling airflow; and   an air conduit connected to the pressurized air source and configured to provide the cooling airflow to the engine aftertreatment system.   
     
     
         2 . The cooling system of  claim 1 , wherein the air conduit is located at least partially inside the engine compartment. 
     
     
         3 . The cooling system of  claim 1 , wherein the engine aftertreatment system includes a reductant line connected to a reductant source. 
     
     
         4 . The cooling system of  claim 3 , wherein the air conduit surrounds the reductant line. 
     
     
         5 . The cooling system of  claim 3 , wherein the engine aftertreatment system further includes a valve provided on the reductant line. 
     
     
         6 . The cooling system of  claim 5 , wherein the air conduit deliver the cooling airflow to the valve. 
     
     
         7 . The cooling system of  claim 3 , wherein the reductant source is located outside the engine compartment. 
     
     
         8 . The cooling system of  claim 1 , wherein the pressurized air source includes a fan. 
     
     
         9 . A power system comprising:
 an engine contained inside an engine compartment;   an engine aftertreatment system associated with the engine; and   a cooling system for the engine aftertreatment system, the system including:
 a pressurized air source configured to generate a cooling airflow; and 
 an air conduit connected to the pressurized air source and configured to provide the cooling airflow to the engine aftertreatment system. 
   
     
     
         10 . The power system of  claim 9 , wherein the air conduit is located at least partially inside the engine compartment. 
     
     
         11 . The power system of  claim 9 , wherein the engine aftertreatment system includes a reductant line connected to a reductant source. 
     
     
         12 . The power system of  claim 11 , wherein the air conduit surrounds the reductant line. 
     
     
         13 . The power system of  claim 11 , wherein the engine aftertreatment system further includes a valve provided on the reductant line. 
     
     
         14 . The power system of  claim 13 , wherein the air conduit delivers the cooling airflow to the valve. 
     
     
         15 . The power system of  claim 13 , wherein the pressurized air source delivers the cooling airflow to a radiator associated with the engine. 
     
     
         16 . A method for cooling an engine aftertreatment system at least partially located inside an engine compartment, the method comprising:
 generating a cooling airflow by a pressurized air source; and   providing the cooling airflow to the engine aftertreatment system by an air conduit connected to the pressurized air source.   
     
     
         17 . The method of  claim 16 , wherein the cooling airflow is further provided to a reductant line. 
     
     
         18 . The method of  claim 17 , wherein the cooling airflow is further provided to a valve connected to the reductant line.