| 摘要 |
The present invention relates to an ejection and recovery device for an exhaust gas purifying liquid of a vehicle. The device comprises an purifying liquid tank where a purifying liquid is stored; an exhaust line where vehicle exhaust gas passes through; a purifying liquid supply unit which selectively provides air and the purifying liquid supplied from the purifying liquid tank; a main discharge line which provides the purifying liquid supplied from the purifying liquid supply unit to the exhaust gas passing through the exhaust line by being connected to the exhaust line; a purifying liquid recovery line which supplies the purifying liquid remaining in the main discharge line to the purifying liquid tank by being connected to the main discharge line; and a control unit which controls the operation of the purifying liquid supply unit, the opening and closing of the main discharge line, and opening and closing of the purifying liquid recovery line. The purifying liquid supply unit comprises a rotating operation motor; a first eccentric cam connected to the rotating shaft of the rotating operation motor by an eccentric force; a purifying liquid supply pump which is operated by the first eccentric cam; an air supply pump which is operated by the pressure of the first eccentric cam by being arranged on the side facing the purifying liquid supply pump; a stepping motor which is arranged on the side facing the rotating operation motor; and a second eccentric cam connected to the rotating shaft of the stepping motor by an eccentric force. The ejection and recovery device prevents freezing in the winter by being installed outside the purifying liquid tank. Moreover, the device removes the purifying liquid from a supply line by a prompt processing signal. The removal is promptly performed after an engine stops an operation. Therefore, the device can efficiently supply purifying liquid and remove the liquid from the line without an additional engine operation and an additional air supply system. |
