Verfahren und System für das Regenerieren einer Abgasnachbehandlungsvorrichtung

• Main Authors: Eastwood, Peter Graham, Clayton, Chris David, Summer, Andrew David, Carlile, Jack, Roca, Miguel Angel, Palomar, Ivan, Ford, Kim
• Format: Patent
• Language: German
• Published: 04.07.2019
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; 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; INTERNAL-COMBUSTION PISTON ENGINES; 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

Verfahren für das Regenerieren einer mit einem Motor (12) verbundenen Abgasnachbehandlungsvorrichtung (35; 36), die Abgase von dem Motor (12) aufnimmt, wobei in dem Verfahren:während eines normalen Einsatzes des Motors (12) der Motor (12) in einem Betriebsmodus betrieben wird,ermittelt wird, ob ein Regenerieren (110) der Abgasnachbehandlungsvorrichtung (35; 36) erforderlich ist, undwenn ein Regenerieren als erforderlich ermittelt worden ist, der Motor (12) abhängig von der Temperatur der Abgase in einem von mindestens zwei separaten Betriebsmodi während des Regenerierens betrieben wird, wobeiwenn die Temperatur der Abgase über einer ersten vorbestimmten Temperatur (T2) liegt, der Motor (12) in einem regenerativen Betriebsmodus (160) betrieben wird, um eine konstante Zunahme der Temperatur der in die Abgasnachbehandlungsvorrichtung (35; 36) eindringenden Abgase zu erzeugen, ohne Temperaturgrenzwerte der Abgasnachbehandlungsvorrichtung (35; 36) zu übersteigen,wenn die Temperatur unter der ersten vorbestimmten Temperatur (T2) liegt, der Motor (12) in einem Übergangsmodus (150) betrieben wird ohne Berücksichtigung der Temperaturgrenzwerte der Abgasnachbehandlungsvorrichtung (35; 36), um eine schnelle Zunahme der Temperatur der in die Abgasnachbehandlungsvorrichtung (35; 36) eindringenden Abgase zu erzeugen, undvom Übergangsmodus (150) zum regenerativen Betriebsmodus (160) gewechselt wird, wenn die Temperatur der in die Abgasnachbehandlungsvorrichtung (35; 36) eindringenden Abgase die erste vorbestimmte Temperatur übersteigt. Regenerating an exhaust treatment device connected to an internal combustion engine comprises operating the engine in a transient mode to produce a rapid increase in exhaust gas temperature entering the exhaust treatment device and switching to the regenerative mode of operation from the transient mode of operation when the temperature of the exhaust gases entering the exhaust treatment device exceeds a first predetermined temperature. Regenerating an exhaust treatment device connected to an internal combustion engine (12) to receive exhaust gases from the engine comprises operating the engine in an operational mode during normal use of the engine; determining whether regeneration of the exhaust treatment device is required; and if regeneration is determined to be necessary, operating the engine in one of at least two separate modes of operation during regeneration dependent upon the temperature of the exhaust gases. If the temperature of the exhaust gases is above a first predetermined temperature, the engine is operated in a regenerative mode of operation to produce a steady increase in the temperature of exhaust gases entering the exhaust treatment device without exceeding any temperature limits for the exhaust treatment device. If the temperature is below the first predetermined temperature, the engine is operated in a transient mode to produce a rapid increase in exhaust gas temperature entering the exhaust treatment device and switching to the regenerative mode of operation from the transient mode of operation when the temperature of the exhaust gases entering the exhaust treatment device exceeds the first predetermined temperature. An independent claim is also included for a system for controlling the regeneration of an exhaust treatment device connected to an internal combustion engine comprising a controller operably connected to a temperature sensor (37) positioned upstream from the exhaust treatment device to sense the temperature of the exhaust gases entering the exhaust treatment device, wherein the controller is programmed to control the operation of the engine to operate the engine in an operational mode during normal use of the engine, determine whether regeneration of the exhaust treatment device is required and if regeneration is determined to be necessary, operate the engine in one of at least two separate modes of operation during regeneration dependent upon the temperature of the exhaust gases entering the exhaust treatment device as sensed by the temperature sensor.