Exhaust gas purifier for internal combustion engine

An exhaust gas purifier (26) has DPFs (19A, 19B), fuel addition valves (20A, 20B), and ECU (25). ECU (25) controls the fuel addition valves (20A, 20B) so as to add fuel according to target regeneration temperature correction coefficients, and thereafter, when PM accumulation amounts in both DPFs (19...

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Bibliographische Detailangaben
Hauptverfasser:	MURATA, DAI, OKAMURA, MASAAKI, TAKAHASHI, YOSHIYUKI, AMAIKE, MASAAKI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING 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 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 purifier (26) has DPFs (19A, 19B), fuel addition valves (20A, 20B), and ECU (25). ECU (25) controls the fuel addition valves (20A, 20B) so as to add fuel according to target regeneration temperature correction coefficients, and thereafter, when PM accumulation amounts in both DPFs (19A, 19B) become smaller than a regeneration end threshold, ECU (25) controls the fuel addition valves (20A, 20B) so as to end the addition of fuel. ECU (25) sets the target regeneration temperature correction coefficient to 1 when the PM accumulation amount in DPF (19A, 19B) becomes smaller than the regeneration end threshold; ECU (25) calculates the target regeneration temperature correction coefficient according to the PM accumulation amount in DPF (19A, 19B) when the PM accumulation amount in DPF (19A, 19B) is not smaller than the regeneration end threshold.