FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

When a given learning performance condition is met, a partial lift injection for opening a fuel injector is performed by an injection pulse which brings about a partial lift state in which a lift quantity of a valve body of the fuel injector does not reach a full lift position, and an integrated val...

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Bibliographische Detailangaben
1. Verfasser:	KATSURAHARA HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING WEAPONS
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Beschreibung
Zusammenfassung:	When a given learning performance condition is met, a partial lift injection for opening a fuel injector is performed by an injection pulse which brings about a partial lift state in which a lift quantity of a valve body of the fuel injector does not reach a full lift position, and an integrated value of a drive current is calculated which flows through a drive coil of the fuel injector after an injection pulse of the partial lift injection is turned off. An inductance of the drive coil is calculated in consideration of a direct current superposition characteristic of the drive coil on the basis of the integrated value of the drive current, whereby the inductance of the drive coil is calculated with high accuracy. Then, the lift quantity of the valve body is estimated on the basis of the inductance, whereby the lift quantity of the valve body is estimated with high accuracy. The injection pulse of the partial lift injection is corrected on the basis of the lift quantity, whereby the injection pulse of the partial lift injection is corrected with high accuracy.