[특허]Method and device for introducing liquid into an exhaust-gas purification system

[미국특허] Method and device for introducing liquid into an exhaust-gas purification system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01N-003/00
출원번호	US-0816365 (1997-03-13)
우선권정보	DE-4432576 (1994-09-13)
발명자 / 주소	Hofmann Lothar,DEX Neufert Ronald,DEX Mathes Wieland,DEX
출원인 / 주소	Siemens Aktiengesellschaft, DEX
대리인 / 주소	Lerner
인용정보	피인용 횟수 : 110 인용 특허 : 5

초록 ▼

Nitrogen oxides emitted by an internal-combustion engine operated with excess air are normally converted by the method of selective catalytic reduction by bringing the nitrogen oxides, together with ammonia, into contact with a selective catalyst. Due to the dangers associated with the use of ammonia, in a motor vehicle ammonia should only be carried in the form of a substance which liberates ammonia, generally an aqueous urea solution. A method and a device for introducing liquid into an exhaust-gas purification system according to the invention avoids frost damage to sections of the system during shutdown times and permits operation of the system at temperatures below the freezing point of the reducing agent solution being used. The method and device include a (thermally insulated) reservoir for the reducing agent liquid and a liquid supply line which is connected thereto and terminates in an outlet opening for the liquid. The reservoir and the liquid supply line can be heated. Furthermore, a heater is provided for liquefying a starting volume which is small as compared with the volume of the reservoir. The liquid supply line may also have a back-flush valve to which a gas that is under pressure can be applied. The supply line can consequently be blown free.

대표청구항 ▼

[ We claim:] [1.] A method for operating an exhaust-gas purification device, which comprises:drawing a liquid from a reservoir through a supply line;introducing the liquid into an exhaust gas in an exhaust of a combustion system during combustion, for chemical purification of the exhaust gas; anddraining at least a section of the supply line with a pressurized gas during a shutdown of the combustion system. [9.] A device for operating an exhaust-gas purification device, comprising:a reservoir for a liquid;a supply line connected between said reservoir and an exhaust-gas purification device;a pressurized-gas inlet; anda valve connected between said pressurized-gas inlet and said supply line for introducing pressurized gas into said supply line in a direction towards said reservoir. The device according to claim 9, wherein said valve is a back-flush valve disposed in said supply line. The device according to claim 10, including further back-flushable structural components disposed in said liquid supply line between said valve and said reservoir. The device according to claim 9, wherein said valve has a first state permitting a flow through said supply line from said reservoir to the exhaust-gas purification device and a second state permitting a flow through said supply line from said pressurized-gas inlet to said reservoir. The device according to claim 12, wherein said valve has a third state in which said reservoir is closed. The device according to claim 12, wherein said valve configuration has a state in which said pressurized-gas inlet is connected to the exhaust-gas purification device. The device according to claim 13, wherein said valve configuration has a state in which said pressurized-gas inlet is connected to the exhaust-gas purification device. The device according to claim 9, wherein the pressurized gas is introduced into said supply line at a location immediately alongside the exhaust-gas purification device. The device according to claim 9, wherein the pressurized gas is introduced into said supply line at a location nearer to the exhaust-gas purification device than to said reservoir. The device according to claim 9, including a device for heating said liquid supply line. The device according to claim 18, wherein said reservoir has a given volume, and including an intermediate container associated with said heatable liquid supply line for a volume of the liquid smaller than said given volume.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

Lane William H. (Chillicothe IL) Peterson Randy N. (Peoria IL) Smith Aaron L. (East Peoria IL) White Scott T. (East Peoria IL) Learned Daniel J. (Peoria IL), Combustion exhaust purification system and method.
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Usui Toshifumi (Katsuta JPX) Yanagisawa Shozo (Ibaraki JPX), Exhaust emission control apparatus for diesel engine.
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Projahn Ulrich (Ditzingen DEX), Pilot burner for a device for burning solids in the exhaust gas of internal combustion engines.
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이 특허를 인용한 특허 (110) 인용/피인용 타임라인 분석

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Method and device for introducing liquid into an exhaust-gas purification system 원문보기

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[미국특허] Method and device for introducing liquid into an exhaust-gas purification system 원문보기

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대표청구항 ▼

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이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

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