| 摘要 |
PROBLEM TO BE SOLVED: To discharge residual urea water to an exhaust pipe while suppressing temperature drop of stored urea water.SOLUTION: An exhaust emission control device of an internal combustion engine discharges the urea water remaining between a supply line 25 and an urea water injection valve 28 to the exhaust pipe 2 by condensed water stored in a condensed water tank 36 installed inside an urea water tank 27 to discharge the residual urea water to the exhaust pipe while the temperature drop of the stored urea water is suppressed. |
