Arrangement for internal combustion engine

Abstract

A sound-absorbing exhaust system for an internal combustion engine. The system may comprise a receptacle, an inlet which is arranged in the receptacle and through which exhaust gases can be directed into the same, and a discharge pipe, which connects the interior of the receptacle to the ambient air and through which exhaust gases can be discharged from the same. The discharge pipe may have, at its end positioned outside the receptacle, a seal, which substantially seals the discharge pipe at this end. The discharge pipe may have at least one, but also a plurality of radial holes, which are positioned outside the receptacle. The system may further include a sleeve, which wholly or partially surrounds the discharge pipe outside the receptacle. This arrangement may reduce the emission of exhaust gas noise from the system.

1 . A sound-absorbing exhaust system for an internal combustion engine, said exhaust system comprising: 
 a receptacle,    an inlet which is arranged in the receptacle and through which exhaust gases can be directed into the receptacle, and    a discharge pipe, which connects the interior of the receptacle to the ambient air and through which exhaust gases can be discharged from the receptacle,    wherein the discharge pipe at its end positioned outside the receptacle has a seal, which substantially seals the discharge pipe at this end, that the discharge pipe has at least one radial hole, which is positioned outside the receptacle, and that a sleeve wholly or partially surrounds the discharge pipe outside the receptacle.    
   
   
       2 . A sound-absorbing exhaust system as claimed in  claim 1 , in which the discharge pipe has a plurality of radial holes, which are positioned outside the receptacle.  
   
   
       3 . A sound-absorbing exhaust system as claimed in  claim 1 , in which the seal includes a star crimp.  
   
   
       4 . A sound-absorbing exhaust system as claimed in  claim 1 , in which the sleeve is attached to the receptacle.  
   
   
       5 . A sound-absorbing exhaust system as claimed in  claim 4 , in which the sleeve projects from the receptacle to the same extent as does the discharge pipe.  
   
   
       6 . A sound-absorbing exhaust system as claimed in  claim 1 , in which the receptacle is elongate in the longitudinal direction of the discharge pipe, and the discharge pipe extends into the receptacle, at least along half the length of the receptacle.  
   
   
       7 . A sound-absorbing exhaust system as claimed in  claim 6 , in which the receptacle in the longitudinal direction is divided into a plurality of chambers by means of at least one gas-permeable partition.  
   
   
       8 . A sound-absorbing exhaust system as claimed in  claim 1 , in which the discharge pipe at its end positioned in the receptacle has a seal and a plurality of radial holes.