| 摘要 |
The purpose of the present invention is to reliably detect cover clogging even while a detection device is in a dead zone. A PM sensor (46) includes an element portion (64), an element temperature detection portion (68), a heater (70), an element cover (74), etc. When exhaust temperature rises, an ECU (50) detects the clogging of the element cover (74) on the basis of the difference between the element temperature and the exhaust temperature. The ECU (50) also detects the clogging of the element cover (74) on the basis of the temperature rising characteristics of the element portion (64) obtained when the element portion (64) is heated by the heater (70). This makes it possible to reliably detect the clogging of the element cover (74) even while the PM sensor (46) is in a dead zone and improve the reliability of the sensor. |
