Device for Controlling Fuel Injection Valve

摘要

An object of the invention is to reduce an injection quantity of minimum by reducing difference in machines of fuel injection valves and difference in injection quantities of fuel injection valves caused by difference in characteristics. A fuel injection valve drive unit includes a unit that individually sets drive current waveform profiles according to cylinders, and includes a unit that individually sets drive current waveform profiles of the fuel injection valves on the basis of identification information based on injection quantity characteristics of the fuel injection valves.

主权项

1. A control apparatus for a fuel injection valve comprising:
a fuel injection control unit that performs a current application control of a plurality of fuel injection valves directly injecting fuel for each cylinder into a combustion chamber of an internal engine; an injection quantity characteristic acquiring unit that detects or acquires injection quantity characteristic information of each of the plurality of fuel injection valves from memory medium; and a current waveform profile setting unit that varies a current waveform profile of the time when the fuel injection control unit controls current application of the fuel injection valves, wherein the current waveform profile setting unit individually sets a drive current waveform profile of each fuel injection valve on the basis of the injection quantity characteristic information, the current waveform profile includes a peak current supply period for opening the fuel injection valve and a holding current supply period for holding the fuel injection valve open by supplying a battery voltage, the fuel injection control unit supplies, in the peak current supply period, a boost voltage obtained by raising the battery voltage or supplies a voltage to supply a current higher than that of the holding current period, and the current waveform profile setting unit time-controls the peak current supply period of each fuel injection valve on the basis of the injection quantity characteristic information.