Metering system and method for operating a metering system
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United States of America Patent
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Feb 2, 2010
Grant Date -
Dec 13, 2007
app pub date -
Sep 16, 2005
filing date -
Nov 10, 2004
priority date (Note) -
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Abstract
The invention relates to a dosing system comprising a dosing means for metering a liquid, especially an aqueous urea solution used for the after treatment of exhaust gases generated by combustion engines. The liquid can be conveyed from a reservoir into an exhaust manifold through the dosing means in a normally operating conveying device. According to the invention, at least one area that is located between a dosing point and the reservoir and is impinged upon by the liquid can be emptied counter to a normal transport direction of the liquid.
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