Patent ID: 8485314
Filing Date: 2013-07-16
Classification: F01N

Abstract:
1. An exhaust muffler of an internal combustion engine, comprising: at least one pipe section on an inflow side and at least one pipe section on an outflow side; a muffler housing that is in communication with the pipe sections, wherein the muffler housing is made at least partly of a plastic material, and wherein at least portions of the pipe sections which are located in an interior of the muffler housing are provided with openings comprising microperforations; and wherein the housing of plastic material includes at least in sections an internal coating made from a thermally more stable material than the plastic material, and wherein the internal coating is applied at axial locations along the housing that correspond to the openings in the portions of the pipe sections, and wherein the openings and the internal coating are separated by a radial distance.