METHOD AND DEVICE FOR CONTROLLING INTERNAL COMBUSTION ENGINE

To improve both of robustness of air-fuel ratio feedback control and exhaust performance.SOLUTION: An internal combustion engine 10 changes the learning frequency of a learning value used for air-fuel ratio feedback control in accordance with an amount of evaporated fuel adsorbed on a canister 18 (a...

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Bibliographische Detailangaben
Hauptverfasser:	OHASHI HITOSHI, SHIMOJO SHIGEMASA
Format:	Patent
Sprache:	eng ; jpn
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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Zusammenfassung:	To improve both of robustness of air-fuel ratio feedback control and exhaust performance.SOLUTION: An internal combustion engine 10 changes the learning frequency of a learning value used for air-fuel ratio feedback control in accordance with an amount of evaporated fuel adsorbed on a canister 18 (an adsorption rate of the canister 18). That is, the learning frequency of the learning value used for air-fuel ratio feedback control is set to be higher as the amount of the evaporated fuel adsorbed on the canister 18 is larger. Accordingly, the internal combustion engine 10 can improve both of robustness in air-fuel ratio feedback control and exhaust performance.SELECTED DRAWING: Figure 1 【課題】空燃比フィードバック制御のロバスト性向上と排気性能向上との両立を図る。【解決手段】内燃機関１０は、キャニスタ１８に吸着した蒸発燃料量（キャニスタ１８の吸着割合）に応じて、空燃比フィードバック制御に用いる学習値の学習頻度を変更する。すなわち、空燃比フィードバック制御に用いる学習値の学習頻度は、キャニスタ１８に吸着した蒸発燃料量が多くなるほど高く設定する。これによって、内燃機関１０は、空燃比フィードバック制御におけるロバスト性向上と排気性能向上との両立を図ることができる。【選択図】図１