EXHAUST GAS SYSTEM OF AN INTERNAL COMBUSTION ENGINE, AND METHOD FOR PREPARING A REDUCING AGENT WHICH IS INTRODUCED INTO THE INTERNAL COMBUSTION ENGINE EXHAUST GAS

摘要

The invention relates to an exhaust gas system of an internal combustion engine and to a method for preparing a reducing agent which is introduced into the internal combustion engine exhaust gas. The exhaust gas system according to the invention has a reducing agent preparation section (1) with a first cylindrical exhaust gas line pipe portion (2) which opens approximately perpendicularly into the second exhaust gas line pipe portion (3) via an opening (8) in a cylinder lateral face of the second exhaust gas line pipe portion (3). An injector unit (4) for introducing the reducing agent into the exhaust gas is arranged on the first exhaust gas line pipe portion (2) upstream of the opening (8). According to the invention, the opening (8) in the cylinder lateral face of the second exhaust gas line pipe portion (3) has a greater extension in the direction of the longitudinal extension of the second exhaust gas line pipe portion (3) than transversely thereto. A rotating exhaust gas flow is formed within the second exhaust gas line pipe portion (3) for the method according to the invention.