| 摘要 |
PURPOSE:To make proper maintenance attainable as well as to improve maintainability ever so better and make the drive securable into optimum conditions all the time with sizable trouble obviated, by installing a monitor which usually monitors a performance state and informs itself of it. CONSTITUTION:High pressure fuel is spouted out of an injection nozzle 19 but at this time if a switch 25 is connected to a traveling contact (a), a central processing unit 24 is driven in a specified state after being inputted with a crank angle out of a crank angle detector 27. The CPU24 outputs each control signal to an A/D converter 21, a state judging arithmetic unit 22 and an output unit 23. And, each detection signal out of those of first to third detectors 13, 15 and 20 is inputted into the state arithmetic unit 22 via the A/D converter 21 and comparatively studied, then the result is notified to the output unit 23. On the other hand, the state judging arithmetic unit 22 compares fuel pump pressure and injection pressure both with the setting value as well as compares the injection timing during which a neeld valve 16 is actuated, with the setting value too, thereby judging the state of an injection valve. |
