| 摘要 |
<p>A control device for an internal combustion engine (2) includes a SCR system (8) disposed in an exhaust passage (4) and a particulate matter sensor (14) disposed downstream of the SCR system (8). The control device applies a particulate matter trapping voltage to the particulate matter sensor (14), and acquires an output of the particulate matter sensor (14) at a first timing after the start of application of the particulate matter trapping voltage. The control device executes predetermined control in accordance with the output. If a second timing at which an integrated operating time period of the internal combustion engine in a predetermined operating state in which urea-related substances discharged to downstream of the SCR system (8) increase reaches a reference time period after starting application of the particulate matter trapping voltage is earlier than the first timing, the control device stops the predetermined control.</p> |
