Patent ID: 11946403
Assignee: nan
Field: Environmental technology (Chemistry)
Classification: CPC F | IPC F

Claim 0:
1. An exhaust system for a two stroke engine of 66 cc/80 cc or a 70 cc hybrid engine comprising a first end and a second end, and comprising, in sequential order:
a flange at the first end of the exhaust system;
a header adjacent to the flange;
a curved portion adjacent to the header;
an expansion chamber comprising a front end and a back end, wherein the expansion chamber is adjacent to the curved portion at the front end; and
a stinger extending from the back end of the expansion chamber;
wherein the expansion chamber comprises a hollow chamber comprising a divergent portion at the front end, a belly about the center of the expansion chamber, and a convergent portion at the back end, and wherein the convergent portion has a truncated cone shape and an angle (θ) at the vertex (V) of between about 15° and about 30° and a height greater than the height of the divergent portion.