| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the over-richness of an air-fuel ratio at the deceleration of an internal combustion engine even if the fuel pressure of fuel which is pressure-sent to a fuel injection value is high, in a control system of a fuel injection valve.SOLUTION: A control system includes: a fuel injection valve which is driven by an electromagnetic actuator, and supplies fuel to an internal combustion engine; a fuel pump which pressure-sends the fuel to the fuel injection valve; a pressure detection part which detects the fuel pressure of the fuel which is pressure-sent to the fuel injection valve from the fuel pump; a DC-DC converter which regulates a voltage of a DC power supply, and outputs the regulated voltage to the electromagnetic actuator; and a control part which controls the output voltage of the DC-DC converter. When the control part performs the reduction-amount correction control of an injection amount of the fuel injection valve at the deceleration of the internal combustion engine, the control part sets a target output voltage of the DC-DC converter high as a detection value of the fuel pressure is high when the fuel pressure is not lower than a prescribed value.SELECTED DRAWING: Figure 2 |
