Exhaust Gas Control System for Internal Combustion Engine

An exhaust gas control system (10) includes a DOC (oxidation catalyst) (52) and a DPF (particulate filter) (53) in an exhaust passage. The exhaust gas control system executes feedback control over an amount of energy supplied to the DPF (post fuel injection amount) such that an actual temperature of...

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Bibliographische Detailangaben
Hauptverfasser:	Takamoto, Satoshi, Yokoi, Tatsuhisa
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 exhaust gas control system (10) includes a DOC (oxidation catalyst) (52) and a DPF (particulate filter) (53) in an exhaust passage. The exhaust gas control system executes feedback control over an amount of energy supplied to the DPF (post fuel injection amount) such that an actual temperature of the DPF coincides with a predetermined command temperature at the time when a regeneration start condition of the DPF (53) is satisfied. In this feedback control, the exhaust gas control system (10) calculates a target value of a sensor detected temperature, that is, a sensor target detected temperature, detected by a temperature sensor (65, 66) using a temperature sensor model (a first temperature sensor model or a second temperature sensor model) constructed using Pade approximation in consideration of a dead time and a lag. However, during a predetermined period after the regeneration start condition is satisfied, feedback control based on the sensor target detected temperature is prohibited.