| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection control device for controlling the operation of an injector in which specific contents of an abnormality are determined when an abnormality that the drive of the injector is not normally executed occurs. <P>SOLUTION: An EDU 100 performs fuel injection by supplying power to the injector during the on-period of a drive signal IJT from an engine ECU 130. The EDU 100 detects a current supplied to the injector and outputs a current supply detection signal INJF to be turned on when the supply of the current is detected and to be turned off when the supply of the current is not detected to the engine ECU 130. The CPU 11 of the engine ECU 100 compares the waveform of an injection command TQ generated by itself with that of the current supply detection signal INJF inputted from the EDU 100 to the injection command TQ, and determines whether the fuel injection is normal or not based on the comparison of the waveforms. When the abnormal state is present, even the specific contents (abnormality of injection start timing, abnormality of injection time, and abnormality of the injection frequency) is determined based on the waveform comparison result. <P>COPYRIGHT: (C)2013,JPO&INPIT |
