[특허]Apparatus and method for regenerating NOx catalyst for diesel engine

[미국특허] Apparatus and method for regenerating NOx catalyst for diesel engine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01N-003/00
출원번호	US-0171858 (1998-10-23)
우선권정보	JP0130885 (1996-04-26)
국제출원번호	PCT/JP97/01418 (1997-04-24)
§371/§102 date	19981023 (19981023)
국제공개번호	WO-9741336 (1997-06-11)
발명자 / 주소	Wakamoto Koutaro,JPX
출원인 / 주소	Komatsu Ltd., JPX
대리인 / 주소	Sidley & Austin
인용정보	피인용 횟수 : 42 인용 특허 : 2

초록 ▼

The present invention is an apparatus and a method for regenerating an NO.sub.X catalyst for a diesel engine, which is capable of regenerating the NO.sub.X catalyst having a lower performance due to accumulated SO.sub.x. For this purpose, the regeneration apparatus includes an NO.sub.X catalyst (3) in an exhaust pipe (2), a reductant fuel adding nozzle (7), a flow rate control valve (10) for controlling a feed rate of reductant fuel supplied to the reductant fuel adding nozzle (7), an inlet temperature sensor (14) of the NO.sub.X catalyst (3), and a regeneration control unit (17) for computing the quantity of SO.sub.x taken into the NO.sub.X catalyst (3) during a period of time in which the inlet temperature is not higher than a predetermined value with a zero feed rate instruction given to the flow control valve (10), and for outputting an instruction for supplying a quantity of the reductant fuel which is larger than a predetermined quantity thereof which is suitable for the operational condition of the diesel engine (1) when the inlet temperature exceeds a predetermined value and the reductant fuel is started to be added.

대표청구항 ▼

[What is claimed is:] [1.]an exhaust pipe;a NO.sub.X catalyst device, positioned in said exhaust pipe, said NO.sub.X catalyst device containing a NO.sub.X catalyst which has a performance for reducing NO.sub.X in exhaust gas passing through said exhaust pipe, which performance is lowered by said NO.sub.X catalyst absorbing SO.sub.x from said exhaust gas;a reductant fuel adding nozzle, associated with said exhaust pipe for adding a reductant fuel into said exhaust pipe at a location upstream of said NO.sub.X catalyst;a flow rate control valve, for controlling a feed rate of the reductant fuel to said reductant fuel adding nozzle;a NO.sub.X catalyst temperature sensor, disposed in said exhaust pipe for providing a temperature signal representative of a temperature of said NO.sub.X catalyst; anda regeneration control unit which computes a quantity of SO.sub.x absorbed into said NO.sub.X catalyst during a period of time when said temperature signal indicates that the temperature of said NO.sub.X catalyst is not higher than a predetermined value and an instruction of a zero feed rate is given to said flow rate control valve; andwherein, when said temperature exceeds said predetermined value and reductant fuel is being fed to said nozzle, said regeneration control unit outputs an instruction to said flow rate control valve to supply to said nozzle a larger quantity of reductant fuel, which is larger than a predetermined quantity which is suitable for a current operational condition;whereby the addition of said larger quantity of reductant fuel effects a regeneration of said NO.sub.X catalyst.

이 특허에 인용된 특허 (2) 인용/피인용 타임라인 분석

Hirota Shinya (Susono JPX) Katoh Kenji (Shizuoka JPX), Exhaust gas purification system for an internal combustion engine.
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Nomura Hiroshi (Susono JPX) Hirose Katsuhiko (Susono JPX) Kotani Takeshi (Mishima JPX) Matsushita Souichi (Susono JPX) Nakanishi Kiyoshi (Susono JPX) Ohno Eishi (Mishima JPX) Nomura Kenichi (Mishima , Exhaust gas purification system for an internal combustion engine.
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이 특허를 인용한 특허 (42) 인용/피인용 타임라인 분석

Axel Lang DE; Jens Druckhammer DE; Frank Schulze DE, Apparatus and method for monitoring NOx storage catalytic converters.
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Cunningham, Michael; Stroia, Bradlee, Apparatus, system, and method for regenerating an exhaust gas treatment device.
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Golunski,Stanislaw Edmund; Houel,Valerie Marie Renee; Hawkings,Andrea; James,David William; Pollington,Stephen David; Poulston,Stephen; Rajaram,Raj Rao, Catalyst structure for treating NOcontaining exhaust gas from a lean burn engine.
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Nagaoka,Daiji; Gabe,Masashi; Sato,Hitoshi, Control method of exhaust gas purifying system.
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Miller, Michael J.; Zhang, Guoqing, Control strategy for reducing fuel consumption penalty due to NOx adsorber regeneration.
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Kanazawa, Yukiko; Katashiba, Hideaki; Kawajiri, Kazuhiko; Yonezawa, Takashi, Device for controlling an internal combustion engine.
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Ruth, Michael J.; Cunningham, Michael J.; Wills, Joan M.; Kocher, Lyle E., Diesel oxidation catalyst filter heating system.
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Light-Holets, Jennifer K., Engine control system and method based on fuel quality.
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Light-Holets, Jennifer K., Engine control system and method based on fuel quality.
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Kojiro Okada JP; Takashi Dogahara JP; Yasuki Tamura JP, Exhaust emission control device of internal combustion engine.
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Kimura,Koichi; Hirota,Shinya; Henda,Yoshimitsu; Itoh,Kazuhiro; Asanuma,Takamitsu; Toshioka,Shunsuke; Nakano,Yasuaki; Nakatani,Koichiro; Mikami,Akira, Exhaust emission purification device for internal combustion engine.
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Okada, Kojiro; Nakayama, Osamu; Tamura, Yasuki; Kawashima, Kazuhito, Exhaust gas purifier for use in internal combustion engine.
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Okada, Kojiro; Nakayama, Osamu; Tamura, Yasuki; Kawashima, Kazuhito, Exhaust gas purifier for use in internal combustion engine.
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Taga, Junichi; Yokota, Kazuya; Kuji, Youichi, Exhaust gas purifying apparatus for internal combustion engine.
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Okada, Kojiro; Tamura, Yasuki, Exhaust gas purifying apparatus of internal combustion engine.
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Imai, Daichi, Exhaust purification system of internal combustion engine.
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Yoshida, Kohei; Asanuma, Takamitsu; Iida, Masahide; Sobue, Yuichi, Exhaust purification system of internal combustion engine.
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Nobuaki Takaoka JP; Hiroshi Oono JP, Exhaust purifying apparatus for internal combustion engine.
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Bidner, David Karl; Surnilla, Gopichandra; Makki, Imad Hassan, Fueling control during emission control device purging.
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Shimada, Hiroshi; Oka, Yousuke, Method and apparatus for managing denitration catalyst.
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Shimada, Hiroshi; Oka, Yousuke, Method and apparatus for managing denitration catalyst.
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Smaling, Rudolf M., Method and apparatus for purging SOX from a NOX trap.
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Telford, Clive D., Method and apparatus for selective catalytic reduction of NOx.
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Schaller,Johannes, Method and system for regenerating, particularly desulfating, a storage-type catalytic converter during the purification of exhaust gases.
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Pott, Ekkehard, Method for desulfating an NOx accumulator catalytic converter.
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Surnilla, Gopichandra; Bidner, David Karl, Method for improved vehicle performance.
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Hertzberg, Andreas, Method for operating an emission control system having nitrogen oxide storage.
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Oosumi, Kazuo, Method of controlling exhaust gas purification system and exhaust gas purification system.
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Feeney, Mark Edward; Leslie, Keith John; Syed, Yusuf Razi; Hartropp, Simon John, Method of monitoring gas turbine engine operation.
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Viola, Michael B.; Schmieg, Steven J.; Sloane, Thompson M.; Hilden, David L.; Mulawa, Patricia A.; Lee, Jong H.; Cheng, Shi-Wai S., Method to monitor HC-SCR catalyst NOx reduction performance for lean exhaust applications.
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Bartley, Gordon J. J., Monitoring of exhaust gas oxidation catalysts.
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Hu,Haoran; Stover,Thomas; McCarthy, Jr.,James Edward, Narrow speed range diesel-powered engine system w/ aftertreatment devices.
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David George Farmer ; Gopichandra Surnilla ; Michael John Cullen, Open-loop method and system for controlling the storage and release cycles of an emission control device.
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Wang, Yue Yun; Geckler, Samuel C.; Chen, Jer Sheng J.; Cunningham, Michael J.; Popuri, Sriram Satya Srinivas; Ruth, Michael J., Optimized desulfation trigger control for an adsorber.
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Houel, Valerie Marie Renee; Rajaram, Raj Rao; Tsolakis, Athanasios, Reducing coking over Ag/Al2O3 HC-SCR catalyst.
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Stroia, Bradlee; Cunningham, Michael, Reductant injection rate shaping method for regeneration of aftertreatment systems.
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Stroia, Bradlee; Cunningham, Michael, Reductant injection rate shaping method for regeneration of aftertreatment systems.
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Poggio Luca,ITX ; Ceccarini Daniele,ITX ; De Cesare Matteo,ITX ; Barberio Ciro,ITX ; Verdecchia Alessandro,ITX, Self-adapting control method for an exhaust system for internal combustion engines with controlled ignition.
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Morita, Tomoko; Suzuki, Norio; Ohno, Hiroshi, Sulfur purge control device for an internal combustion engine.
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Wills, Joan M., System for controlling absorber regeneration.
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Wang, Yue Yun; Popuri, Sriram Satya Srinivas; Wills, Joan M., System for controlling adsorber regeneration.
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Wang, Yue Yun; Popuri, Sriram Satya Srinivas; Ruth, Michael J.; Cunningham, Michael J.; Wills, Joan M.; Chen, Jer-Sheng J.; Geckler, Samuel C., System for controlling triggering of adsorber regeneration.
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[미국특허] Apparatus and method for regenerating NOx catalyst for diesel engine 원문보기