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Method for correcting fuel injection amount in common-rail-type fuel injection control device and common-rail-type fuel injection control device
Method for correcting fuel injection amount in common-rail-type fuel injection control device and common-rail-type fuel injection control device
A common-rail-type fuel injection control device where an error in the correction of a fuel injection amount when an exhaust brake is used is eliminated enabling a more reliable correction of a fuel injection amount.;A minute injection is performed plural times in a non-injection state. A difference between a reference energizing time, which becomes the reference for a fuel injection valve, and an actual energizing time based on a frequency component corresponding to a variation in an engine speed which is generated in the minute injection is learned. A correction control corrects an energizing time and timing. The correction control is corrected corresponding to a presence or non-presence of an operation of an exhaust brake and a magnitude of a supercharging pressure, and an amount of variation in an engine speed calculated based on a rotational variation frequency component.
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