FIELD: machine building.
SUBSTANCE: feed device (1) for reducing agent supply to the device (15) for spent gas treatment, having a feed channel (3) with flexible area (4) of wall. The flexible area (4) of the wall can deform upon the reducing agent freezing in the feed channel (3). The flexible area (4) of the wall separates the feed channel (3) from the compressed air chamber (6) connected with the compressed air source (16). Also the method of operation of the feed device (1), method of the feed device (1) switching off are described. Also the vehicle (13) with the feed device (1) is described.
EFFECT: assurance of accurate dosing, protection of pressure sensitive parts during freezing, compact design, assurance of active-passive adaptation of section shape of the feed channel.
10 cl, 5 dwg
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