Patent ID: 9341100
Filing Date: 2016-05-17
CPC Classification: F01N,Y02A,Y02T

Claim Text:
1. A reducing agent addition and preparation system of a motor vehicle, configured to add a liquid reducing agent to exhaust gas emitted by an internal combustion engine of the motor vehicle and to prepare the added reducing agent in the exhaust gas, the system comprising: a reducing agent metering unit; an injector connected to the reducing agent metering unit and configured to spray a reducing agent spray jet into the exhaust gas; a mixing tube situated in an exhaust tract of the internal combustion engine and having a first and a second axial mixing tube end; and a funnel element situated on or in the mixing tube in a region of the first mixing tube end, wherein the funnel element widens conically at a predetermined widening angle in a direction from the first mixing tube end toward the second mixing tube end, wherein the mixing tube and the funnel element are hollow bodies having a respective perforated lateral surface, and a perforation of the mixing tube has an at least predominantly larger surface area than a perforation of the funnel element, wherein the funnel element has a passage opening on an end of the funnel element situated on or in the first mixing tube end, and wherein the reducing agent metering unit is situated in such a way that the injector sprays the reducing agent spray jet through the funnel element passage opening into an interior of the funnel element.