Liquid reservoir, in particular for an aqueous urea solution

Abstract

The fluid container (1) has a temporary storage (2) arranged in a base of the fluid container, and the filter elements (4) are arranged in the base outside the temporary storage. The filter elements are connected with the fluid conveying unit (3) over a fluid supply line (5). The filter elements are designed, such that a filtering cloth of the filter elements is permeable for the fluid in the container and impermeable for the air.

Description

technical field [0001] The invention relates to a liquid reservoir, in particular for aqueous urea solutions. Background technique [0002] In vehicle engineering, the SCR (Selective Catalytic Reduction) method is increasingly used to reduce nitrogen oxide emissions from diesel vehicles. The ammonia required for the SCR reaction is not used directly, but is used in the form of a 32.5% aqueous urea solution according to DIN70070. The aqueous urea solution is injected from the SCR catalytic converter into the exhaust line, for example by means of a metering pump or injector. Urea-water solution undergoes hydrolysis reaction to produce ammonia and CO 2 . The resulting ammonia reacts with nitrogen oxides in the exhaust gas, thereby reducing nitrogen oxide emissions. The amount of urea injected depends on the nitrogen oxide emissions of the engine and thus on the instantaneous speed and torque of the engine. The efficiency of the SCR catalytic converter here depends on the a...

AI Technical Summary

Problems solved by technology

In the case of several filter fabrics distributed over the bottom of the fuel tank, the problem arises that the air has to be removed evenly from all liquid lines in order to subsequently ensure an even delivery of the fuel

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