CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

An internal combustion engine is equipped with an exhaust purification catalyst (20), an upstream air-fuel ratio sensor (40), a downstream air-fuel ratio sensor (41), and sensor heaters (56) of the upstream air-fuel ratio sensor (40) and the downstream air-fuel ratio sensor (41). A control device co...

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Bibliographische Detailangaben
Hauptverfasser:	IDE, Koji, HAYASHITA, Go
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	An internal combustion engine is equipped with an exhaust purification catalyst (20), an upstream air-fuel ratio sensor (40), a downstream air-fuel ratio sensor (41), and sensor heaters (56) of the upstream air-fuel ratio sensor (40) and the downstream air-fuel ratio sensor (41). A control device comprises an air-fuel ratio control part configured to control the air-fuel ratio of the exhaust gas and a heating control part configured to control the heating of the air-fuel ratio sensors. The heating control part controls the sensor heaters so that the temperature of the upstream air-fuel ratio sensor (40) becomes less than the activation temperature and so that the temperature of the downstream air-fuel ratio sensor (41) becomes the activation temperature or more while the internal combustion engine is stopped by the automatic stop function. The air-fuel ratio control part controls the exhaust air-fuel ratio based on the outputs of the two air-fuel ratio sensors during engine operation and control the air-fuel ratio temporarily based on only the output of the downstream air-fuel ratio sensor (41) after the internal combustion engine has been restarted after automatic stop.