System for adding and processing reducing agent in a motor vehicle

摘要

A system for adding and processing reducing agent includes an injector connected to a reducing agent metering unit and which can spray a jet of reducing agent into the exhaust gas. A mixing pipe is disposed in an exhaust pipe of the internal combustion engine and a funnel element is disposed on or in the mixing pipe in the region of the first mixing pipe end. The mixing pipe and the funnel element are formed as hollow bodies having perforated outer surfaces, the perforation of the mixing pipe has a larger surface area than the perforation of the funnel element. The funnel element has a passage opening on the end of the funnel element assigned to the first mixing pipe end, and the reducing agent metering unit is disposed such that the injector sprays the jet of reducing agent through the passage opening into the interior of the funnel element.

主权项

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.