METHOD AND SYSTEM FOR DETERMINING AIR-FUEL RATIO IMBALANCE

METHOD AND SYSTEM FOR DETERMINING AIR-FUEL RATIO IMBALANCE

Methods and systems include determining a cylinder air-fuel ratio imbalance in a multi-cylinder engine. In one example, the method may include sequentially firing an engine cylinder to provide an expected air-fuel deviation and learning cylinder air-fuel ratio imbalance based on an error between an...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Jentz Robert Roy, Jammoussi Hassene, Surnilla Gopichandra, Kluzner Michael Igor, Makki Imad Hassan
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:Methods and systems include determining a cylinder air-fuel ratio imbalance in a multi-cylinder engine. In one example, the method may include sequentially firing an engine cylinder to provide an expected air-fuel deviation and learning cylinder air-fuel ratio imbalance based on an error between an actual air-fuel ratio deviation from a maximum lean air-fuel ratio relative to an expected air-fuel deviation during a deceleration fuel shut-off event.