Patent ID: 8201577

Claim:
An arrangement for feeding a liquid additive from a receptacle into one of a fuel line and exhaust pipe of an internal-combustion engine of a motor vehicle, the receptacle being fillable with additive from a larger storage tank accommodated in the motor vehicle via a connection line blockable by a shut-off element, the arrangement comprising: a pump operatively arranged in one of the receptacle or the connection line, the pump operating in a first direction to feed the liquid additive from the receptacle into said one of the fuel line and exhaust pipe, and the pump further operable in a second direction to feed the liquid additive from the larger storage tank into the receptacle; a heating device operatively arranged for heating at least a partial volume of the additive present in an area of the receptacle in proximity to the heating device; a closeable return flow line operatively arranged to branch-off of the connection line between the pump and the shut-off element, the return flow line being coupled into the receptacle and configured to recirculate at least the partial volume of the additive present in the area of the receptacle in proximity to the heating device to an area of the receptacle that is not in proximity to the heating device; and a blockable feed line by which the liquid additive is fed into said one of the fuel line and exhaust pipe, wherein the feed line branches-off of the connection line between the receptacle and the storage tank.