Heat urea strainer for diesel engine

Abstract

A urea strainer includes a mesh for removing impurities from urea passing therethrough and heatable wires to heat the urea as it passes through the mesh. The urea is provided to an emission control system of a diesel engine.

1 . A system comprising:
 a urea tank; and   a strainer through which urea from the tank passes to an emission control system of a diesel engine, at least portions of the strainer being heatable to heat urea passing therethrough.   
   
   
       2 . The system of  claim 1 , wherein the portions include wires. 
   
   
       3 . The system of  claim 2 , wherein the wires criss-cross. 
   
   
       4 . The system of  claim 1 , wherein the strainer is disc-shaped. 
   
   
       5 . The system of  claim 1 , wherein the strainer removes impurities from urea passing therethrough. 
   
   
       6 . The system of  claim 2 , wherein the wires are juxtaposed with material in a mesh to remove impurities from urea. 
   
   
       7 . The system of  claim 2 , comprising an electrical connector configured for engaging a source of electricity, the connector being electrically connected to at least some of the wires. 
   
   
       8 . Apparatus comprising:
 strainer engageable with a urea tank associated with a diesel engine for chemically reacting with nitrogen oxide, the strainer including plural elements removing impurities from urea passing therethrough, at least some elements being heatable by electricity to heat urea; and   an electrical connector configured for engaging a source of electricity, the connector being electrically connected to at least some of the elements.   
   
   
       9 . The apparatus of  claim 8 , wherein the elements include wires. 
   
   
       10 . The apparatus of  claim 9 , wherein the wires criss-cross. 
   
   
       11 . The apparatus of  claim 8 , wherein the strainer is disc-shaped. 
   
   
       12 . The apparatus of  claim 9 , wherein the wires are juxtaposed with material in a mesh to remove impurities from urea. 
   
   
       13 . Method comprising:
 removing impurities from urea; and   heating urea as the impurities are being removed therefrom.   
   
   
       14 . The method of  claim 13 , comprising providing the urea to a diesel engine emission control system. 
   
   
       15 . The method of  claim 13 , comprising a providing a strainer purifying and heating the urea. 
   
   
       16 . The method of  claim 15 , wherein at least portions of the strainer are heatable to heat urea passing therethrough. 
   
   
       17 . The method of  claim 15 , wherein the strainer is disc-shaped. 
   
   
       18 . The method of  claim 15 , heatable wires of the strainer are juxtaposed with material in a mesh to remove impurities from urea. 
   
   
       19 . The system of  claim 18 , comprising an electrical connector configured for engaging a source of electricity, the connector being electrically connected to at least some of the wires.