Two-sectioned back-pressured catalytic converter

Abstract

A two-sectioned back-pressured catalytic converter has a main body, a tail tube, and a honeycomb carrier. The honeycomb carrier is mounted securely in the main body and has a first section relatively proximal to the intake opening and a second section relatively proximal to the exhaust opening. The density of the holes of the first section is higher than that of the second section. Therefore, waste gas has sufficient space for expansion when passing through the first section, and thus the pressure and the temperature are both lowered, solving problems of the back pressure and the backward pushing. The tail tube is securely mounted into the main body to form a baffle. The waste gas will hit the baffle after passing the honeycomb carrier and generate turbulence which can slow down the gas and make the gas fully react with the precious metal coating.

What is claimed is: 
     
         1 . A two-sectioned back-pressured catalytic converter comprising:
 a main body being hollow, and having
 an intake opening; and 
 an exhaust opening; 
   a tail tube securely mounted in the exhaust opening of the main body and mounted into the main body to form a baffle in the main body; and   a honeycomb carrier mounted securely in the main body, and having
 a first section and a second section which are connected to each other; the first section disposed proximal to the intake opening relative to the second section, and the second section disposed proximal to the exhaust opening relative to the first section; the first section and the second section respectively having multiple holes, a density of the holes of the first section is higher than a density of the holes of the second section. 
   
     
     
         2 . The two-sectioned back-pressured catalytic converter as claimed in  claim 1 , wherein a length of the first section is shorter than a length of the second section. 
     
     
         3 . The two-sectioned back-pressured catalytic converter as claimed in  claim 1 , wherein the density of the holes of the first section is from 100 to 150 cpsi. 
     
     
         4 . The two-sectioned back-pressured catalytic converter as claimed in  claim 2 , wherein the density of the holes of the first section is from 100 to 150 cpsi. 
     
     
         5 . The two-sectioned back-pressured catalytic converter as claimed in  claim 3 , wherein the density of the holes of the first section is 100 cpsi. 
     
     
         6 . The two-sectioned back-pressured catalytic converter as claimed in  claim 4 , wherein the density of the holes of the first section is 100 cpsi. 
     
     
         7 . The two-sectioned back-pressured catalytic converter as claimed in  claim 1 , wherein the density of the holes of the second section is from 60 to 100 cpsi. 
     
     
         8 . The two-sectioned back-pressured catalytic converter as claimed in  claim 6 , wherein the density of the holes of the second section is from 60 to 100 cpsi. 
     
     
         9 . The two-sectioned back-pressured catalytic converter as claimed in  claim 7 , wherein the density of the holes of the second section is 60 cpsi. 
     
     
         10 . The two-sectioned back-pressured catalytic converter as claimed in  claim 8 , wherein the density of the holes of the second section is 60 cpsi. 
     
     
         11 . The two-sectioned back-pressured catalytic converter as claimed in  claim 1 , wherein the main body has
 a carrier section, the honeycomb carrier mounted in the carrier section; and   a tapered section connected to the carrier section, the exhaust opening formed on the tapered section, and the tail tube mounted into the tapered section;   wherein an inner diameter of the tapered section progressively decreases from the carrier section to the exhaust opening.   
     
     
         12 . The two-sectioned back-pressured catalytic converter as claimed in  claim 10 , wherein the main body has
 a carrier section, the honeycomb carrier mounted in the carrier section; and   a tapered section connected to the carrier section, the exhaust opening formed on the tapered section; and the tail tube mounted into the tapered section;   wherein an inner diameter of the tapered section progressively decreases from the carrier section to the exhaust opening.