| 摘要 |
PROBLEM TO BE SOLVED: To provide a monitoring device of an engine control unit which can accurately calculate a fuel injection amount even if there arises a situation that a port level of an injection monitor signal is changed in a short time.SOLUTION: A data acquisition permission flag which is brought into an ON-state when a port level of an injection monitor signal becomes Lo, and brought into an OFF-state when the port level of the injection monitor signal becomes Hi is stored. Even if the port level of the injection monitor signal becomes Lo, when the data acquisition permission flag is brought into the ON-state already, the read-in of a fuel injection time is not performed even if the port level of the injection monitor signal is changed. By this constitution, a short-time interval occurs, and thereby it is prevented that a fuel injection amount is not accurately calculated resulting from the fact that the port level corresponding to a continuous edge interruption call becomes Lo.SELECTED DRAWING: Figure 9 |
