Device for producing an overtone-rich sporty exhaust sound

Abstract

The device for producing an overtone-rich, sporty exhaust sound of the exhaust system of a four-cylinder engine includes exhaust pipes with four manifold pipes, at least one front pipe and a tail pipe. The length and/or cross-section of at least one exhaust pipe differ from the length and/or cross-section of the other exhaust pipes. At least some of the exhaust pipes lead into a first, second and/or third collecting point.

We claim:  
     
         1 . A device for producing an overtone-rich, sporty sounding exhaust sound in four-cylinder engines, the device comprising exhaust gas-conducting pipes with at least four manifold pipes, at least one front pipe and a tail pipe, wherein at least one of the exhaust gas-conducting pipes has a length and/or cross-section different from a length and/or cross-section of all other exhaust gas-conducting pipes, and wherein at least some of the exhaust gas-conducting pipes meet in a first collecting point, a second collecting point and/or a third collecting point.  
     
     
         2 . The device according to    claim 1   , wherein the length and/or cross-section of at least one manifold pipe differs from the length and/or cross-section of the other manifold pipes.  
     
     
         3 . The device according to    claim 1   , comprising at least two front pipes, wherein the length and/or cross-section of one front pipe is different from the length and/or cross-section of the other front pipe.  
     
     
         4 . The device according to    claim 3   , wherein at least two manifold pipes meet in the first or second collecting points, and wherein a front pipe begins at the first or second collecting points.  
     
     
         5 . The device according to    claim 4   , comprising two front pipes, wherein the front pipes meet in the third collecting point, and wherein the length and/or cross-section of one of the front pipes differ from the length and/or cross-section of the other front pipe.  
     
     
         6 . The device according to    claim 1   , comprising a resonator space coupled to at least one manifold pipe and/or a front pipe.  
     
     
         7 . The device according to    claim 1   , comprising a screen mounted in at least one manifold pipe and/or a front pipe.  
     
     
         8 . The device according to    claim 1   , comprising a nozzle mounted in at least one manifold pipe and/or a front pipe.  
     
     
         9 . The device according to    claim 1   , comprising a valve mounted in at least one manifold pipe and/or a front pipe.  
     
     
         10 . The device according to    claim 1   , comprising a flow-active body mounted in at least one manifold pipe and/or a front pipe.  
     
     
         11 . The device according to    claim 10   , wherein the flow-active body is a catalyst body.