DELIVERY DEVICE FOR DELIVERING A LIQUID ADDITIVE OUT OF A TANK, METHOD THEREFOR AND MOTOR VEHICLE HAVING A DELIVERY DEVICE
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United States of America Patent
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app pub date -
May 16, 2014
filing date -
Nov 16, 2011
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Abandoned
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Abstract
A delivery device for delivering a liquid additive out of a tank to an exhaust-gas treatment device includes a delivery duct with an overall volume and a pump disposed in the delivery duct. The delivery duct has a flexible wall portion, downstream of the pump in a delivery direction, with an outer side of the flexible wall portion situated opposite the delivery duct and bearing against a stop when a pressure in the delivery duct lies in a predefined operating pressure range. A spring element which is disposed on the outer side is constructed to deform the flexible wall portion in such a way that the overall volume is reduced in size when the pressure in the delivery duct is lower than a threshold pressure. A method for compensating a formation of ice in a delivery device and a motor vehicle having a delivery device are also provided.
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