INTERNAL COMBUSTION ENGINE CONTROL DEVICE

In S poisoning recovery control of a NSR catalyst, a target exhaust air-fuel ratio is set to strong rich until a peak position of SOx accumulation amount in the NSR catalyst is moved to a center portion of the NSR catalyst (ST5). After the peak position of the SOx accumulation amount is moved to the...

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Bibliographische Detailangaben
Hauptverfasser:	NOGI Yoshito, OHASHI Nobumoto, NOZAKI Yusuke
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:	In S poisoning recovery control of a NSR catalyst, a target exhaust air-fuel ratio is set to strong rich until a peak position of SOx accumulation amount in the NSR catalyst is moved to a center portion of the NSR catalyst (ST5). After the peak position of the SOx accumulation amount is moved to the center portion of the NSR catalyst, the target exhaust air-fuel ratio is set to weak rich when a floor temperature of the NSR catalyst exceeds a predetermined value (ST8). Thus, a release speed of H 2 S and SO 2 is decreased to improve exhaust emission and reduce malodor of an exhaust gas. After the peak position of the SOx accumulation amount is moved to the center portion of the NSR catalyst, the target exhaust air-fuel ratio is set to the strong rich when the floor temperature of the NSR catalyst is less than or equal to the predetermined value (ST9). Thus, a time period required for the S poisoning recovery control is shortened and a fuel consumption rate is improved.