| 摘要 |
<p>An exhaust passage (26) of an engine (1) is provided with a urea addition valve (230) to which urea water for purifying exhaust gas is supplied. A control device (80) calculates, based on a residual quantity of fuel in a fuel tank that stores engine fuel, a required addition quantity as a quantity of urea water that is required for executing cooling addition to cool the urea addition valve (230). Then, the control device (80) gives a notification of the residual quantity of urea water when a residual quantity of urea water in a tank (210) that stores urea water decreases to the calculated required addition quantity.</p> |
