| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection state detection device that can detect an actual injection state with high accuracy. <P>SOLUTION: The fuel injection state detection device is applied to a fuel injection system provided with a fuel pressure sensor which is installed in a fuel supply route from the discharge port of a common rail through to the injection hole of a fuel injection valve, detects a fuel pressure, and outputs a sensor wave form W representing a change of the fuel pressure occurring with a fuel injection. The detection device includes: a pulsation estimator S20 estimating from the sensor wave form W, a wave form Wm of a supply pulsation occurring by a flow of a fuel flowing in the fuel injection valve through fuel piping from the discharge port of the common rail, when the fuel is injected; a pulsation remover S30 correcting the sensor wave form W so that the wave form Wm of the supply pulsation, estimated by the pulsation estimator S20 is removed from the sensor wave form W; and fuel injection state estimator S70 to S100 estimating the fuel injection state from the injection hole, based on a sensor wave form W' remove-corrected by the pulsation remover S30. <P>COPYRIGHT: (C)2012,JPO&INPIT |
