| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diagnosing system of an NOx sensor for extending the battery life and the service life of the NOx sensor. <P>SOLUTION: This diagnosing system of the NOx sensor 100 is arranged in an exhaust passage of an internal combustion engine and detects a NOx concentration in exhaust gas. The diagnosing system of the NOx sensor 100 is characterized by comprising a first diagnosing means 170 for diagnosing whether the NOx sensor 100 is abnormal during the operation of the internal combustion engine, and a second diagnosing means 170 for diagnosing whether the NOx sensor 100 is abnormal during the stop of the internal combustion engine when the first diagnosing means 170 diagnoses that the NOx sensor 100 is abnormal. <P>COPYRIGHT: (C)2009,JPO&INPIT |
