Fuel injection control apparatus for fuel injection system of vehicle, calculates fuel injection characteristic value of fuel based on fuel pressure curve, if engine operating condition is changed by force

摘要

The apparatus has a fuel pressure sensor (20) that detects the pressure of fuel injected by a fuel injector (10). The change of fuel pressure is detected by a fuel pressure waveform detecting unit based on detected value of sensor, and a fuel pressure curve. An engine operating condition is forcibly changed, so that a value indicating the engine operating condition is acquired in accordance with a reference value. An injection characteristic value of the fuel is calculated based on fuel pressure curve if the engine operating condition is changed by force.