| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a urea quality diagnosis system capable of accurately diagnosing the quality of aqueous urea solution within a urea tank. <P>SOLUTION: The concentration and the level L of an aqueous urea solution within a urea tank 16 are detected, and when the level L is higher than or equal to a predetermined value, the quality of the aqueous urea solution is diagnosed on the basis of the detected value of the concentration of the aqueous urea solution. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
