EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

An exhaust gas control apparatus includes a catalytic device (12) in an exhaust passage (11), and the catalytic device carrying an NSR catalyst and an oxygen storage agent. A poisoning recovery control section (17) of the catalytic device (12) executes poisoning recovery control and includes: an oxy...

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Bibliographische Detailangaben
1. Verfasser:	BISAIJI, Yuki
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION 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 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	An exhaust gas control apparatus includes a catalytic device (12) in an exhaust passage (11), and the catalytic device carrying an NSR catalyst and an oxygen storage agent. A poisoning recovery control section (17) of the catalytic device (12) executes poisoning recovery control and includes: an oxygen storage amount estimation section (19) that estimates an oxygen storage amount of the catalytic device (12); a determination section (20) that determines timing at which an estimation value of the oxygen storage amount becomes equal to or less than an elimination start determination value after a start of elimination processing in the poisoning recovery control as elimination start timing; and a termination timing decision section (22) that decides termination timing of the poisoning recovery control on the basis of a supply amount of a reducing agent to the catalytic device (12) in a period after the elimination start timing during the elimination processing.