Muffler for an exhaust system of vehicle

Abstract

Disclosed is a muffler for an exhaust system of a vehicle, which improves fuel efficiency through weight reduction and reduces deterioration of peripheral components. To this end, the present provides a muffler for an exhaust system of a vehicle. More specifically, the muffler includes a triple-material hollow casing, in which an outer layer formed of a plastic material and disposed on the outermost surface of the muffler, an intermediate insulating layer disposed on the inside of the outer layer and containing an aerogel material, and an inner layer formed of a stainless steel material and disposed on the inside of the intermediate insulating layer are stacked.

1 . A muffler for an exhaust system of a vehicle, the muffler comprising
 a triple-material hollow casing made up of at least three stacked layers, wherein the at least three stacked layers includes:
 an outer layer formed of a plastic material and disposed on the outermost surface of the muffler, 
 an intermediate insulating layer disposed on the inside of the outer layer and containing an aerogel material, and 
 an inner layer formed of a stainless steel material and disposed on the inside of the intermediate insulating layer. 
   
     
     
         2 . The muffler of  claim 1 , wherein the intermediate insulating layer comprises a nonwoven fabric impregnated with the aerogel. 
     
     
         3 . The muffler of  claim 1 , wherein the intermediate insulating layer has a thickness of 1 to 20 mm depending on the temperature of exhaust gas. 
     
     
         4 . The muffler of  claim 1 , wherein the outer layer comprises a mixture of a plastic material and a reinforcing material. 
     
     
         5 . The muffler of  claim 1 , wherein the outer layer comprises 30 to 95 wt % of a plastic material and 5 to 70 wt % of a reinforcing material. 
     
     
         6 . The muffler of  claim 5 , wherein the reinforcing material has a ratio of length to diameter of at least 30. 
     
     
         7 . The muffler of  claim 1 , wherein the casing comprises
 first and second baffles for dividing the internal space into first to third chambers,   an exhaust gas input pipe coming from the front of the case, supported by the first and second baffles, passing through the first and second chambers, and extending to the third chamber, and   an exhaust gas output pipe supported by the second baffle, passing through the second and third chambers, and going to the rear of the casing.   
     
     
         8 . An exhaust system for a vehicle, comprising
 an exhaust line configured to route and remove exhaust from an engine; and   a muffler disposed within the exhaust line, wherein the muffler includes a casing made up of at least three stacked layers, the at least three stacked layers including:
 a first layer made of a plastic material and disposed on the outermost surface of the muffler casing, 
 an intermediate insulating layer disposed on the inside of the outer layer and containing at least an aerogel material, and 
 an inner layer made of a stainless steel material and disposed on the inside of the intermediate insulating layer. 
   
     
     
         9 . The muffler of  claim 10 , wherein the intermediate insulating layer comprises a nonwoven fabric impregnated with the aerogel. 
     
     
         10 . The muffler of  claim 10 , wherein the intermediate insulating layer has a thickness of 1 to 20 mm depending on the temperature of exhaust gas. 
     
     
         11 . The muffler of  claim 11 , wherein the outer layer comprises a mixture of a plastic material and a reinforcing material. 
     
     
         12 . The muffler of  claim 11 , wherein the outer layer comprises 30 to 95 wt % of a plastic material and 5 to 70 wt % of a reinforcing material. 
     
     
         13 . The muffler of  claim 12 , wherein the reinforcing material has a ratio of length to diameter of at least 30. 
     
     
         14 . The muffler of  claim 11 , wherein the casing comprises
 first and second baffles for dividing the internal space into first to third chambers,   an exhaust gas input pipe coming from the front of the case, supported by the first and second baffles, passing through the first and second chambers, and extending to the third chamber, and   an exhaust gas output pipe supported by the second baffle, passing through the second and third chambers, and going to the rear of the casing.