| 摘要 |
The present invention relates to a method and a system to warn an exhaustion of a selective catalytic reduction (SCR) urea solution, which limits a driving speed of a vehicle when a urea solution is exhausted or has a defect in order for a driver to recognize the same. The method to warn the exhaust of an SCR urea solution comprises: a check step of checking a residual quantity of the urea solution in a urea solution tank; a warning step of determining whether the residual quantity of the urea solution reaches a preset warning standard value, and limiting the driving speed of the vehicle at a setting speed when the residual quantity of the urea solution is equal or less than a warning standard value; and a step of inducing reinjection of the urea solution, which limits the driving speed of the vehicle at a minimum speed when the residual quantity of the urea solution reaches a minimum standard value. |
