| 摘要 |
To reliably detect, without adding new parts, injection abnormality not only when fuel injection is not performed but also including fuel injection in a state where the injection quantity has fallen abnormally low. In a state where a flow rate control valve 8 is controlled in a closed loop, a pressure control valve 12 is controlled in an open loop and a quantity (indicated injection quantity) Q of fuel that should be injected from fuel injection valves 13 arithmetically calculated by predetermined arithmetic processing on the basis of the operating state of an engine exceeds zero (S100 and S102), when it has been determined that the difference between a minimum fuel through-flow rateβin the flow rate control valve 8 determined by a predetermined map from an engine speed Ne and the indicated injection quantity Q and a fuel through-flow rateαdecided in closed loop control of the flow rate control valve 8 is larger than a predetermined threshold value K (S112), it is determined there is injection abnormality (S114).
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