| 摘要 |
<p>According to the present invention, an MBT ignition time and a knock ignition time are ascertained from an engine rotational speed and an engine load (step ST4), and the latter of these two times is set as an earliest ignition time (step ST5). An ignition time that is later than the earliest ignition time by a KCS learning value is set as a requested ignition time, and there is determined to be an abnormality occurring in the oil jet when an actual ignition time set by a knock control system is later than the requested ignition time beyond a predetermined amount (steps ST7, ST8). A failsafe process, which involves an action such as correcting the throttle valve opening degree in the closing direction, is executed in accordance with this abnormality determination.</p> |
