Patent ID: 8468802
Filing Date: 2013-06-25
Classification: B01F,F01N,Y02T

Abstract:
1. An exhaust gas system for combustion engines having at least one exhaust gas duct, in particular an exhaust pipe, and having an exhaust gas treatment device downstream of the exhaust gas duct, wherein at least one secondary flow duct, in particular a secondary flow pipe, is provided in and completely arranged within the exhaust gas duct with a cross-section reduced with respect to the exhaust gas duct, wherein the secondary flow duct imparts coerced guidance of some of the exhaust gas flow differing from an actual exhaust gas flow so that a flow direction of the exhaust flow through the secondary flow duct differs from a main exhaust gas flow direction of the actual exhaust gas flow surrounding the secondary flow duct, and wherein the secondary flow duct is made and arranged such that a part exhaust gas flow is guided radially inwardly to the central region of the exhaust gas duct.