Vortex-enhanced exhaust manifold

Abstract

An exhaust manifold for handling exhaust from an internal combustion engine includes an empty main body and an exhaust duct. The main body is defined by a generally cylindrical wall, an aperture and a main body longitudinal axis. The exhaust duct is configured to pass through the wall to terminate inside the main body with an exhaust duct longitudinal axis that is offset from the main body longitudinal axis so that exhaust gasses introduced from the exhaust duct into the main body form a vortex as the gasses progress to the aperture in the main body.

1 . An exhaust manifold for handling exhaust from an internal combustion engine, said exhaust manifold comprising:
 an empty main body defined by a generally cylindrical wall, an aperture and a main body longitudinal axis; and   an exhaust duct configured to pass through said wall to terminate inside said main body, said exhaust duct having an exhaust duct longitudinal axis that is offset from said main body longitudinal axis so that exhaust gasses introduced from said exhaust duct into said main body form a vortex as said gasses progress toward said open end of said main body.   
   
   
       2 . The exhaust manifold of  claim 1  wherein said main body has a generally circular closed end and said aperture is an open end opposite said closed end. 
   
   
       3 . The exhaust manifold of  claim 1  wherein said main body is closed at each end and said aperture is in said cylindrical wall. 
   
   
       4 . The exhaust manifold of  claim 3  wherein said aperture leads to an output duct, said output duct having an output duct longitudinal axis. 
   
   
       5 . The exhaust manifold of  claim 4  wherein said output duct longitudinal axis is in a plane with said exhaust duct longitudinal axis. 
   
   
       6 . The exhaust manifold of  claim 4  wherein said output duct longitudinal axis is offset from said exhaust duct longitudinal axis along said main body longitudinal axis. 
   
   
       7 . The exhaust manifold of  claim 3  wherein said aperture is positioned in said wall diametrically opposite from a point on said wall that is adjacent to an output port of said exhaust duct. 
   
   
       8 . The exhaust manifold of  claim 3  wherein said aperture is positioned in said wall adjacent a point on said wall that is adjacent to an output port of said exhaust duct. 
   
   
       9 . The exhaust manifold of  claim 1  wherein said exhaust duct has an input port for receiving exhaust gasses from a cylinder of said internal combustion engine and an output port through which said exhaust gasses enter said main body. 
   
   
       10 . The exhaust manifold of  claim 9  wherein said exhaust duct includes a taper such that said output port has a smaller cross-sectional area than said input port. 
   
   
       11 . The exhaust manifold of  claim 9  wherein said output port of said exhaust duct has a circular shape. 
   
   
       12 . The exhaust manifold of  claim 9  wherein said output port of said exhaust duct has a gibbous shape.