METHOD FOR OPERATING A DOSING APPARATUS AND MOTOR VEHICLE HAVING A DOSING APPARATUS
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United States of America Patent
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Aug 4, 2014
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Feb 3, 2012
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Abstract
A method for operating a dosing apparatus for providing a liquid additive includes providing the dosing apparatus with at least one pump for pumping the additive from a tank into a pressure accumulator, a dosing valve for providing additive present in the pressure accumulator in a dosed manner, and a return valve through which additive present in the pressure accumulator can be led back into the tank. A dosing demand is established, subsequently the pump is activated to build up a pressure in the pressure accumulator, then the pressure in the pressure accumulator is set to a desired metering pressure, and thereafter the liquid additive is dispensed by the dosing valve. A motor vehicle having a dosing apparatus is also provided.
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