Motorcycle exhaust enhancement device

Abstract

Embodiments of the present invention provide an exhaust enhancement device that allows a motorcyclist to achieve a desired engine sound while also achieving improved engine performance by reducing exhaust reversion. More particularly, embodiments of the present invention provide for an exhaust enhancement device having a cylindrical tubular body portion configured to be disposed within a motorcycle exhaust pipe so that exhaust gasses may flow therethrough. The exhaust enhancement device further includes a frustoconical screen extending from an end of the cylindrical tubular body portion. The frustoconical screen has an array of holes in its wall for allowing exhaust gasses to pass therethrough. The exhaust enhancement device may further include one or more washer-like members disposed therein and configured to alter the flow of exhaust gasses so that reversion is reduced.

1 . An exhaust enhancement device for a motorcycle exhaust pipe comprising: 
 a cylindrical tubular body portion configured to be received within a motorcycle exhaust pipe for receiving the flow of exhaust gases therethrough, said body portion having first and second open opposite ends and a cylindrical wall extending therebetween;    a formanious screen extending from said first end of the cylindrical tubular body portion, said screen having a frustoconical configuration converging as it extends away from the body portion and defining an open first end of a diameter generally corresponding to the diameter of said first end of the body portion and an open opposite second end of a smaller diameter; and    at least one obstruction positioned within the cylindrical tubular body portion or the frustoconical screen in the flow path of exhaust gases passing through the enhancement device.    
   
   
       2 . The exhaust enhancement device of  claim 1 , wherein the at least one obstruction comprises a flat circular member.  
   
   
       3 . The exhaust enhancement device of  claim 2 , wherein the flat circular member is oriented in a plane perpendicular to the longitudinal axis of the cylindrical tubular body portion.  
   
   
       4 . The exhaust enhancement device of  claim 3 , wherein the flat circular member has a central opening and is positioned coaxially of the longitudinal axis of the cylindrical body portion.  
   
   
       5 . The exhaust enhancement device of  claim 4 , wherein the flat circular member is positioned within the frustoconical screen.  
   
   
       6 . The exhaust enhancement device of  claim 5 , wherein outer peripheral edges of the flat circular member are connected to the interior surface of the frustoconical screen to secure the flat circular member in place.  
   
   
       7 . The exhaust enhancement device of  claim 4 , wherein the flat circular member is positioned within the cylindrical tubular body portion.  
   
   
       8 . The exhaust enhance device of  claim 7 , including a shaft having a first end connected to the flat circular member and a second end connected to the interior surface of the cylindrical wall of the tubular body portion.  
   
   
       9 . The exhaust enhancement device of  claim 1 , wherein the at least one obstruction comprises a first flat circular member oriented in a plane perpendicular to the longitudinal axis of the cylindrical tubular body portion and positioned within the frustoconical screen and a second flat circular member oriented in a plane perpendicular to the longitudinal axis of the cylindrical tubular body portion and positioned within the cylindrical tubular body portion.  
   
   
       10 . The exhaust enhancement device of  claim 9 , wherein said first and second flat circular members each have a central opening and are positioned coaxially of the longitudinal axis of the cylindrical body portion.  
   
   
       11 . The exhaust enhancement device of  claim 1 , wherein the frustoconical screen includes a cylindrical first end portion adjacent said open first end which is received within and secured to said cylindrical wall of said cylindrical tubular body portion and a frustoconical tapering second portion extending from said first end portion to said open second end of the frustoconical screen.  
   
   
       12 . The exhaust enhancement device of  claim 1 , wherein an outside diameter of the cylindrical tubular body portion is approximately equal to the inside diameter of the motorcycle exhaust pipe.  
   
   
       13 . The exhaust enhancement device of  claim 1 , wherein the wall of said cylindrical tubular body portion includes a reduced-diameter center chamber between said first and second opposite ends.  
   
   
       14 . The exhaust enhancement device of  claim 13 , wherein the at least one obstruction comprises a flat circular member oriented in a plane perpendicular to the longitudinal axis of the cylindrical tubular body portion and located adjacent one of said ends.  
   
   
       15 . A motorcycle exhaust system comprising: 
 an exhaust pipe for expelling exhaust from an engine;    a cylindrical tubular body portion received within said exhaust pipe for receiving the flow of exhaust gases therethrough, said body portion having first and second open opposite ends and a cylindrical wall extending therebetween;    a formanious screen extending from said first end of the cylindrical tubular body portion, said screen having a frustoconical configuration converging as it extends away from the body portion and defining an open first end of a diameter generally corresponding to the diameter of said first end of the body portion and an open opposite second end of a smaller diameter; and    at least one obstruction positioned within the cylindrical tubular body portion or the frustoconical screen in the flow path of exhaust gases passing through the enhancement device.    
   
   
       16 . The exhaust system of  claim 15 , wherein the at least one obstruction comprises a flat circular member oriented in a plane perpendicular to the longitudinal axis of the cylindrical tubular body portion.  
   
   
       17 . The exhaust system of  claim 16 , wherein the flat circular member has a central opening and is positioned coaxially of the longitudinal axis of the cylindrical body portion.  
   
   
       18 . The exhaust system of  claim 15 , wherein the open second end of the frustoconical screen is oriented toward an engine end of the exhaust pipe.  
   
   
       19 . The exhaust system of  claim 15 , wherein the open second end of the frustoconical screen is oriented toward an exit end of the exhaust pipe.  
   
   
       20 . The exhaust system of  claim 15 , wherein the outside diameter of at least a portion of the cylindrical tubular body portion corresponds approximately to the inside diameter of the exhaust pipe.