Patent ID: 8925297
Filing Date: 2015-01-06
Classification: F01N,Y02T

Abstract:
1. An internal combustion engine having an engine exhaust system, the engine comprising: a cylinder: a muffler; an exhaust conduit coupled between the cylinder and the muffler, the exhaust conduit receiving emissions from the cylinder; a secondary air conduit having a first section integrated with at least a portion of the muffler, and extending around at least a portion of an exterior of the muffler from a region adjacent a location in which the exhaust conduit is coupled to the muffler to another region also located adjacent the location in which the exhaust conduit is coupled to the muffler; wherein the secondary air conduit provides air into the exhaust conduit, the air being heated prior to entering the exhaust conduit due to passing of the air through the first section, wherein the secondary air conduit additionally has a second section at least partly connecting the first section with an orifice on the exhaust conduit at which the air is provided into the exhaust conduit, and wherein the second section is integrated with and extends along a portion of the exhaust conduit from the muffler to the orifice.