EGR-Steuereinrichtung für einen Verbrennungsmotor

An EGR control device includes an EGR control means ( 44 ) which, when a large-amount EGR is requested, continuously controls an EGR valve ( 26 ) toward a fully open condition, and then continuously controls an intake throttle valve ( 12 ) toward a fully closed condition, and in a dead region where...

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Bibliographische Detailangaben
Hauptverfasser:	KOTOOKA, SEIJIRO, YOKOMURA, HITOSHI, KOHKETSU, SUSUMU
Format:	Patent
Sprache:	ger
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	An EGR control device includes an EGR control means ( 44 ) which, when a large-amount EGR is requested, continuously controls an EGR valve ( 26 ) toward a fully open condition, and then continuously controls an intake throttle valve ( 12 ) toward a fully closed condition, and in a dead region where a change in the opening of the intake throttle valve only causes a small change in EGR quantity, the control means restricts a feedback control of the EGR quantity using the intake throttle valve and performs a feedback control of the EGR quantity using the EGR valve to compensate for the restriction of the feedback control using the intake throttle valve.