Tailpipe of automotive vehicle

Abstract

A tailpipe of automotive vehicle comprises a front tube coupled to a muffler, the front tube including two flared ends and a neck having a plurality of apertures, a rear tube having a flared end, an outer venturi tube surrounded a rear portion of the front tube and the whole rear tube, the outer tube including a flared front end, a cylindrical section, an enlarged section, and a rear section having an inward extending rim at an opening thereof, and a plurality of twisted blades equally spaced apart around the rear tube and connected to the front, the rear, and the outer tubes, each blade having a plurality of apertures. Stream of exhaust from the muffler entering into the neck is divided into a number of components prior to forming whirlwind after leaving the tailpipe.

1 . A tailpipe of an automotive vehicle, comprising: 
 a front tube including two flared ends and an intermediate neck having a plurality of rows of apertures wherein one flared end of the front tube is coupled to a muffler;    a rear tube having a flared end;    an outer tube surrounded a rear portion of the front tube and the whole rear tube, the outer tube including a flared front end, a cylindrical section, an enlarged section, and a rear section having an inward extending rim at an opening thereof; and    a plurality of twisted blades equally spaced apart around the rear tube and connected to the front, the rear, and the outer tubes,    wherein a stream of exhaust from the muffler entering into the neck is divided into a first component flowing through the rear tube, and a second component flowing into a space between the neck and the outer tube through the apertures, the second component is mixed with air drawn from the front end of the outer tube to form a third component, the third component flows to a rear of the outer tube after being baffled by the blades and passing a plurality of channels each between two adjacent blades to form a fourth component in a form of whirlwind, and a fifth component in a form of whirlwind is formed by mixing the fourth component with the first component after leaving the tailpipe.    
   
   
       2 . The tailpipe of  claim 1 , wherein one flared end of the front tube comprises a plurality of lengthwise slits.  
   
   
       3 . The tailpipe of  claim 1 , wherein each blade comprises a plurality of apertures.  
   
   
       4 . The tailpipe of  claim 1 , wherein the outer tube has a length of about 12 cm.  
   
   
       5 . The tailpipe of  claim 1 , wherein the front tube has a length of about 12.5 cm.  
   
   
       6 . The tailpipe of  claim 1 , wherein the tailpipe has a length of about 20 cm.  
   
   
       7 . The tailpipe of  claim 1 , further comprising a member formed of sound-absorbing material on a cylindrical surface of the outer tube.