Catalyst Apparatus

Abstract

A catalyst apparatus includes a metal carrier body for containing catalyst and at least a expansion room. The metal carrier body is arranged between an upstream portion and a downstream portion of an exhaust passage, and includes a gas entrance for conducting exhaust gas into the metal carrier body from the upstream portion and a gas exit for conducting the exhaust gas in the metal carrier body to the downstream portion. The expansion room is arranged between the gas entrance and the gas exit to communicate with a gas passage between the gas entrance and the gas exit for conducting the exhaust gas to flow between an inside of the metal carrier body and the expansion room.

1 . A catalyst apparatus, comprising:
 a metal carrier body for containing a catalyst, arranged between an upstream portion and a downstream portion of an exhaust passage, and comprising a gas entrance for conducting exhaust gas into the metal carrier body from the upstream portion and a gas exit for conducting the exhaust gas to the downstream portion from the metal carrier body; and   at least an expansion room, arranged between the gas entrance and the gas exit to communicate with a gas passage between the gas entrance and the gas exit for conducting the exhaust gas to flow between an inside of the metal carrier body and the expansion room.   
     
     
         2 . The catalyst apparatus of  claim 1 , wherein the metal carrier body comprises at least a cylinder body, and a honeycomb body arranged in the cylinder body, wherein the catalyst coats on the honeycomb body. 
     
     
         3 . The catalyst apparatus of  claim 2 , wherein the honeycomb body spaces the gas entrance and the gas exit, and the gas entrance and the gas exit respectively include a plurality of through-holes for conducting the exhaust gas. 
     
     
         4 . The catalyst apparatus of  claim 2 , wherein the honeycomb body is formed by winding a plat plate or a corrugated plate. 
     
     
         5 . The catalyst apparatus of  claim 2 , wherein the honeycomb body is formed by winding a plat plate and a corrugated plate. 
     
     
         6 . The catalyst apparatus of  claim 1 , wherein the exhaust passage is formed in a muffler room. 
     
     
         7 . The catalyst apparatus of  claim 6 , wherein the muffler room comprises a first clapboard arranged between the upstream portion and the downstream portion, a second clapboard arranged between the upstream portion and the expansion room, and a third clapboard arranged between the downstream portion and the expansion room. 
     
     
         8 . The catalyst apparatus of  claim 6 , wherein the expansion room comprises a first expansion room and a second expansion room, and the muffler room comprises a first clapboard arranged between the upstream portion and the second expansion room, a second clapboard arranged between the second expansion room and the downstream portion, a third clapboard arranged between the first expansion room and the upstream portion, and a fourth clapboard arranged between the first expansion room and the downstream portion. 
     
     
         9 . The catalyst apparatus of  claim 7 , wherein the upstream portion is a forward gas-congregating room between a gas inlet of the muffler room and the gas entrance, and the downstream portion is a backward gas-congregating room between a gas outlet of the muffler room and the gas exit. 
     
     
         10 . The catalyst apparatus of  claim 7 , wherein two boards with a lot of holes are arranged in the first expansion room and the second expansion room respectively, and spaces between an end surface of the metal carrier body and an inside wall of the muffler room. 
     
     
         11 . A catalyst apparatus, comprising:
 a first cylinder member and a second cylinder member arranged between an upstream portion and a downstream portion of an exhaust passage, wherein the first cylinder member and the second cylinder member form a carrier body, which comprises a gas entrance for conducting exhaust gas from the upstream portion into the metal carrier body, and a gas exit for conducting the exhaust gas in the metal carrier body to the downstream portion;   a first expansion room in the second cylinder member, communicated with the gas entrance through the carrier body to conduct the exhaust gas to flow between the carrier body and the first expansion room; and   a second expansion room in the first cylinder member, communicated with the gas exit through the carrier body to conduct the exhaust gas to flow among the second expansion room, the carrier body and the gas exit.   
     
     
         12 . The catalyst apparatus of  claim 11  wherein the carrier body further comprises at least a honeycomb body arranged between the first cylinder body and the second cylinder body, wherein the catalyst coats on the honeycomb body. 
     
     
         13 . The catalyst apparatus of  claim 12 , wherein the honeycomb body spaces the gas entrance and the gas exit, and the gas entrance and the gas exit respectively include a plurality of through-holes for conducting the exhaust gas. 
     
     
         14 . The catalyst apparatus of  claim 12 , wherein the honeycomb body is formed by winding a plat plate or a corrugated plate. 
     
     
         15 . The catalyst apparatus of  claim 12 , wherein the honeycomb body is formed by winding a plat plate and a corrugated plate. 
     
     
         16 . The catalyst apparatus of  claim 11 , wherein the exhaust passage is formed in an exhaust pipe. 
     
     
         17 . The catalyst apparatus of  claim 11 , wherein the exhaust passage is formed in a muffler room. 
     
     
         18 . The catalyst apparatus of  claim 11 , wherein the muffler room comprises at least one clapboard formed therein to space the upstream portion and the downstream portion, and the carrier body passes through the clapboard.