Exhaust Gas Purification Apparatus for Engine

Abstract

An exhaust gas purification apparatus for an engine includes an exhaust gas bypass connected to the engine, a muffler connected to the exhaust gas bypass, and a catalytic carrier. The muffler defines an outlet communicating with the atmosphere. The catalytic carrier defines a through-hole for receiving catalyst. The catalytic carrier is mounted in the muffler, and at the outlet of the muffler. The through-hole of the catalytic carrier communicates with the atmosphere via the outlet.

1 . An exhaust gas purification apparatus for an engine, comprising:
 an exhaust gas bypass for being connected to the engine;   a muffler connected to the exhaust gas bypass, the muffler defining an outlet communicating with the atmosphere; and   a catalytic carrier defining a through-hole for receiving catalyst, the catalytic carrier mounted in the muffler, and at the outlet of the muffler, the through-hole communicating with the atmosphere via the outlet.   
   
   
       2 . The exhaust gas purification apparatus as claimed in  claim 1 , wherein the muffler further defines a muffling room, for receiving the catalytic carrier, the outlet of the muffler communicating with the muffling room. 
   
   
       3 . The exhaust gas purification apparatus as claimed in  claim 2 , wherein the muffler still further defines an inlet communicating with the muffling room, the muffler is connected to the exhaust gas bypass via the inlet. 
   
   
       4 . The exhaust gas purification apparatus as claimed in  claim 2 , wherein a pipe is located in the muffling room of the muffler, with an end thereof at the outlet of the muffler, the catalytic carrier is located in the pipe and at the end of the pipe adjacent the outlet. 
   
   
       5 . The exhaust gas purification apparatus as claimed in  claim 2 , wherein a separating board is located in the muffling room of the muffler, the muffling room is divided into a front muffling room, and a rear muffling room, the catalytic carrier is located in the rear muffling room, an opening is defined in the separating board. 
   
   
       6 . An exhaust gas purification system, comprising:
 an engine;   an exhaust gas bypass connected to the engine;   a muffler connected to the exhaust gas bypass, the muffler defining an outlet communicating with the atmosphere; and   a catalytic carrier defining a through-hole for receiving catalyst, the catalytic carrier mounted in the muffler, and at the outlet of the muffler, the through-hole communicating with the atmosphere via the outlet.   
   
   
       7 . The system as claimed in  claim 6 , wherein the muffler further defines a muffling room, for receiving the catalytic carrier, the outlet of the muffler communicating with the muffling room. 
   
   
       8 . The system as claimed in  claim 7 , wherein the muffler still further defines an inlet communicating with the muffling room, the muffler is connected to the exhaust gas bypass via the inlet. 
   
   
       9 . The system as claimed in  claim 7 , wherein a pipe is located in the muffling room of the muffler, with an end thereof at the outlet of the muffler, the catalytic carrier is located in the pipe and at the end of the pipe adjacent the outlet. 
   
   
       10 . The system as claimed in  claim 7 , wherein a separating board is located in the muffling room of the muffler, the muffling room is divided into a front muffling room, and a rear muffling room, the catalytic carrier is located in the rear muffling room, an opening is defined in the separating board. 
   
   
       11 . The system as claimed in  claim 6 , wherein the engine generates a first discontinuous negative pressure when working. 
   
   
       12 . The system as claimed in  claim 11 , wherein the outlet generates a second discontinuous negative pressure when letting off exhaust gases.