Tank for storing a reducing agent

Abstract

The invention relates to a tank for storing a reducing agent, in particular a liquid reducing agent for reducing nitrogen oxides from the waste gas of an internal combustion engine to nitrogen and water. The tank includes an external container in which an internal container is accommodated. The internal container is held in the external container in a mounting that can be axially displaced in relation to an axis of the external container. The internal container is held such that the volume in the external container is modified by displacing the internal container in the mounting.

1 - 10 . (canceled) 
   
   
       11 . A tank for storing a reducing agent, in particular a liquid reducing agent for reducing nitrogen oxides in the exhaust of an internal combustion engine to nitrogen and water, comprising:
 an outer container;   an inner container accommodated within the inner container;   a mount supporting the inner container within the outer container, wherein the mount is able to slide axially in relation to an axis of the outer container, and the inner container is supported so that a sliding of the inner container in the mount changes the volume of the outer container.   
   
   
       12 . The tank as recited in  claim 11 , wherein a spring element is disposed between the inner container and the outer container. 
   
   
       13 . The tail as recited in  claim 12 , wherein the spring element rests with one end against a bottom of the inner container and rests with an other end against a bottom of the outer container. 
   
   
       14 . The tank as recited in  claim 12 , wherein the spring element is manufactured out of an elastomer. 
   
   
       15 . The tank as recited in  claim 13 , wherein the spring element is manufactured out of an elastomer. 
   
   
       16 . The tank as recited in  claim 11 , wherein the inner container is accommodated in an opening of the outer container in such a way that the inner container protrudes from the outer container. 
   
   
       17 . The tank as recited in  claim 12 , wherein the inner container is accommodated in an opening of the outer container in such a way that the inner container protrudes from the outer container. 
   
   
       18 . The tank as recited in  claim 13 , wherein the inner container is accommodated in an opening of the outer container in such a way that the inner container protrudes from the outer container. 
   
   
       19 . The tank as recited in  claim 14 , wherein the inner container is accommodated in an opening of the outer container in such a way that the inner container protrudes from the outer container. 
   
   
       20 . The tank as recited in  claim 15 , wherein the inner container is accommodated in an opening of the outer container in such a way that the inner container protrudes from the outer container. 
   
   
       21 . The tank as recited in  claim 11 , wherein the inner container is embodied with a shoulder that is acted on by a coupling element, which coupling element is attached to the outer container with either frictional, nonpositive engagement or form-locked engagement. 
   
   
       22 . The tank as recited in  claim 12 , wherein the inner container is embodied with a shoulder that is acted on by a coupling element, which coupling element is attached to the outer container with either frictional, nonpositive engagement or form-locked engagement. 
   
   
       23 . The tank as recited in  claim 15 , wherein the inner container is embodied with a shoulder that is acted on by a coupling element, which coupling element is attached to the outer container with either frictional, nonpositive engagement or form-locked engagement. 
   
   
       24 . The tank as recited in  claim 11  wherein an elastic sealing element is accommodated between the inner container and the outer container, in a region of the mount at which the inner container protrudes from the outer container. 
   
   
       25 . The tank as recited in  claim 20 , wherein an elastic sealing element is accommodated between the inner container and the outer containers in a region of the mount at which the inner container protrudes from the outer container. 
   
   
       26 . The tank as recited in  claim 11 , wherein the inner container is connected to a supply module. 
   
   
       27 . The tank as recited in  claim 25 , wherein the inner container is connected to a supply module. 
   
   
       28 . The tank as recited in  claim 26 , wherein the supply module is connected to the inner container so as to be positioned outside of the outer container. 
   
   
       29 . The tank as recited in  claim 27 , wherein the supply module is connected to the inner container so as to be positioned outside of the outer container. 
   
   
       30 . The tank as recited in  claim 11 , wherein a heating element is accommodated in the inner container.