Patent ID: 8708094
Filing Date: 2014-04-29
Classification: F01N,Y02T

Abstract:
1. An exhaust system for an internal combustion engine of a motor vehicle, the system comprising: an exhaust tract comprising at least one exhaust pipe which conducts exhaust gas; and an active silencer comprising a silencer housing and an electro-acoustic converter arranged in the silencer housing and a connection pipe which connects the silencer housing fluidically to the exhaust pipe; a cooler section located between the silencer housing and the exhaust pipe; a plurality of screen elements which each project inwardly from said cooler section, said screen elements being exposed to the exhaust gas, wherein heat is transferred from said screen elements to an outer surface of said cooler section, each of said plurality of screen elements being permeable to airborne noise, said plurality of screen elements cooperating to close off a cross section of said connection pipe in an opaque manner such that a line of sight path is blocked in a viewing direction extending parallel to a longitudinal center axis of said connection pipe, wherein a sound propagation path, formed in the connection pipe for the propagation of airborne noise, is impermeable to thermal radiation emanating from the exhaust gas in the exhaust pipe via at least said plurality of screen elements.