Device For Supplying A Reducing Agent Solution Into An Exhaust System And Corresponding Exhaust System, Method and Vehicle

Abstract

A device for supplying reducing agent solution into an exhaust system, includes a reservoir for reducing agent solution and a delivery device for delivering reducing agent solution from the reservoir to a reducing agent infeed configuration. A delivery height to be overcome between the reservoir and the reducing agent infeed configuration is less than 1.5 meters and the delivery device includes a diaphragm pump. The device permits the dosed metering of reducing agent solution into an exhaust system of an internal combustion engine regardless of prevailing boundary conditions, in particular regardless of the position of the device, which is for example influenced by a position of a corresponding automobile. In particular, it is thus also possible to ensure reliable metering of reducing agent solution into the exhaust system even when the automobile or motor vehicle is traveling over grades. A corresponding exhaust system, method and utility vehicle are also provided.

1 . A device for supplying a reducing agent solution into an exhaust system, the device comprising:
 a reservoir for the reducing agent solution;   a reducing agent infeed configuration; and   a delivery device, including a diaphragm pump, for delivering the reducing agent solution from said reservoir to said reducing agent infeed configuration;   said reservoir and said reducing agent infeed configuration defining a delivery height therebetween of less than 1.5 meters to be overcome.   
   
   
       2 . The device according to  claim 1 , wherein said reducing agent infeed configuration and said delivery device define a geometric spacing of at least 300 mm therebetween. 
   
   
       3 . The device according to  claim 1 , wherein said diaphragm pump of said delivery device is a magnet pump. 
   
   
       4 . The device according to  claim 1 , wherein said diaphragm pump has a hydraulic diaphragm drive. 
   
   
       5 . The device according to  claim 4 , wherein said hydraulic diaphragm drive includes magnetically movable components. 
   
   
       6 . The device according to  claim 1 , wherein said reducing agent infeed configuration includes a nozzle. 
   
   
       7 . The device according to  claim 1 , wherein said reducing agent infeed configuration includes a valve. 
   
   
       8 . The device according to  claim 1 , wherein the reducing agent solution includes an aqueous solution at least of urea. 
   
   
       9 . An exhaust system, comprising:
 a hydrolysis catalytic converter;   an SCR catalytic converter; and   a device according to  claim 1  for supplying a reducing agent solution;   said reducing agent infeed configuration of said device for supplying a reducing agent solution being disposed upstream of said hydrolysis catalytic converter and upstream of said SCR catalytic converter.   
   
   
       10 . A method for operating an exhaust system of a mobile internal combustion engine, the method comprising the following steps:
 supplying a reducing agent solution in the exhaust system of the mobile internal combustion engine with a device according to  claim 1 .   
   
   
       11 . The method according to  claim 10 , wherein the reducing agent solution includes an aqueous solution at least of urea. 
   
   
       12 . A utility vehicle, comprising:
 an exhaust system including:
 a hydrolysis catalytic converter; 
 an SCR catalytic converter; and 
 a device according to  claim 1  for supplying a reducing agent solution; 
 said reducing agent infeed configuration of said device for supplying a reducing agent solution being disposed upstream of said hydrolysis catalytic converter and upstream of said SCR catalytic converter. 
   
   
   
       13 . A utility vehicle, comprising a device according to  claim 1 .