| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device capable of detecting a valve opening time of a fuel injection valve.SOLUTION: A fuel injection control device (ECU) 5 includes a detection control portion 7f for detecting a valve opening time. The detection control portion 7f supplies a low-pressure valve opening voltage to a fuel injection valve 3 from a low-pressure power source 6b. Electric current flowing to a coil 3c slowly rises. When the fuel injection valve 3 reaches a full-open state, a remarkable inflection point appears. A valve opening detecting portion 7c specifies a valve opening time by detecting the inflection point. A correction amount calculating portion 7d calculates a correction amount to compensate an error of a fuel injection amount caused by an error of the valve opening time. In a subsequent fuel injection, a correcting portion 7e corrects a power supply time. As a result, the error of the fuel injection amount caused by the error of the valve closing time can be corrected. |
