| abstract |
PROBLEM TO BE SOLVED: To highly accurately notify that a travelable distance is less than a predetermined value while exhibiting a NOx purification action. By dividing a vehicle speed V by a flow rate F of an aqueous urea solution supplied to a NOx reduction catalyst, a consumption rate Cr indicating a distance that can be traveled by a unit volume of aqueous urea solution while performing a NOx purification action is calculated. (S2 to S4). Further, reading the remaining amount L of the urea aqueous solution that has been stored in the reducing agent container (S5), by multiplying the consumption rate C r on the remaining amount L, the distance D N + 1 runnable at the remaining L Calculate (S6). Then, the average value D AVE of the travel distances D 1 to D N + 1 stored in the memory in time series is calculated (S1, S7 to S9) and displayed (S10), and the average value D AVE is calculated. When it becomes below a predetermined value, the fact is notified (S11, S12). [Selection] Figure 2 |