Patent ID: 7359792

Claim:
A method of initializing a plurality of injectors using pieces of correction data each corresponding to one of the injectors, the pieces of correction data being uniquely determined for the injectors, respectively, and being required to equalize injection quantities from the injectors, the method comprising: (a) obtaining injection characteristics of the injectors based on temporally-input pieces of data as the pieces of correction data, the temporarily-input pieces of data corresponding to the individual injectors, the injection characteristic of each of the injectors depending on the injection quantity thereof; (b) determining whether the obtained injection characteristics are substantially matched with each other; (c) interchanging at least two of the temporarily-input pieces of data with each other when it is determined that the obtained injection characteristics are at least partially mismatched with each other; (d) obtaining injection characteristics of the injectors based on the temporally-input pieces of data whose at least two pieces of data are interchanged with each other; and (e) determining whether the obtained injection characteristics by the step (d) are substantially matched with each other.