Patent ID: 8397863
Filing Date: 2013-03-19
Classification: F01N,Y02T

Abstract:
1. A muffler comprising: only one inlet and only one outlet, through which exhaust gas flows; a tubular main body having a cylindrical lateral wall; a flat front wall, close to the inlet, and a flat rear wall, close to the outlet, which close both ends of the cylindrical lateral wall; a heat exchanger inside the main body; a noise-deadening first conduit, which extends at least partly inside the main body, from a fork region located outside the main body and directly downstream from the inlet, to a converging region directly upstream from the outlet; a second conduit, which extends through the heat exchanger and at least partly inside the main body, from the fork region to the converging region and parallel to the first conduit; and a regulating valve located at the fork region, outside the main body, to selectively direct exhaust gas flow along the first conduit or the second conduit; wherein the converging region is located inside the main body and is defined by an end chamber that is formed in the main body, close to the rear wall, and is separated from the rest of the main body by a diaphragm; wherein the first conduit extends across the diaphragm and through the end chamber so that an outlet of the first conduit constitutes the outlet of the muffler; wherein an outlet of the second conduit comes out across the diaphragm and inside the end chamber; and wherein the first conduit comprises an opening communication with the end chamber.