Patent ID: 8936133
Filing Date: 2015-01-20
Classification: F01N

Abstract:
1. Exhaust apparatus for insertion into an exhaust system of a four cycle internal combustion engine, the exhaust system having a predetermined total length, comprising: an inlet adapted for receiving exhaust from the engine; a divergent cone having at one end a smaller diameter opening and a larger diameter opening on an opposite end, the small diameter opening of the divergent cone being coupled and in fluid communication with the inlet; a first chamber coupled to the larger diameter opening of the divergent cone; a catalytic converter in fluid communication with the first chamber, downstream of the first chamber; and a second chamber in fluid communication with, and downstream of, the catalyst and coupled to an outlet through a convergent cone interposed between the second chamber and an outlet, the convergent cone having a larger opening coupled with the second chamber and a smaller diameter opening coupled with the outlet; wherein the distance between where the smaller opening of the divergent cone and the smaller opening of the convergent cone is at least approximately one-quarter of a length of the exhaust system.