Patent ID: 8341946

Claim:
An exhaust-gas aftertreatment system for exhaust gases of an internal combustion engine, comprising: a filter element having an input side and an output side; a catalyst element having an input side and an output side; an inlet pipe that is divided into a filter pipe and a catalyst pipe on said input side of said filter element and said catalyst element such that one part of an entire exhaust-gas stream flows directly from said inlet pipe to said filter pipe and directly from said filter pipe to said filter element and another part of said entire exhaust-gas stream flows directly from said inlet pipe to said catalyst pipe and directly from said catalyst pipe to said catalyst element; a first return pipe positioned downstream of said filter element and upstream of said catalyst element when said one part of said entire exhaust-gas stream flows directly from said inlet pipe to said filter pipe and directly from said filter pipe to said filter element and when another part of said entire exhaust-gas stream flows directly from said inlet pipe to said catalyst pipe and directly from said catalyst pipe to said catalyst element; and a second return pipe positioned downstream of said catalyst element and upstream of said filter element when said one part of said entire exhaust-gas stream flows directly from said inlet pipe to said filter pipe and directly from said filter pipe to said filter element and when another part of said entire exhaust-gas stream flows directly from said inlet pipe to said catalyst pipe and directly from said catalyst pipe to said catalyst element, and wherein said catalyst element and said filter element are contained in a single housing, and wherein said first return pipe is positioned directly opposite said filter pipe on the output side of said filter element, and wherein said second return pipe is positioned directly opposite said catalyst pipe on said output side of said catalyst element.