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특허 상세정보

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Exhaust gas aftertreatment device for internal combustion engines

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01N-003/20   
미국특허분류(USC) 60/276 ; 60/286
출원번호 US-0053009 (1993-04-27)
우선권정보 DE-4217552 (1992-05-27)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 67  인용 특허 : 0
초록
▼

An exhaust gas aftertreatment device for internal combustion engines having a catalyzer for the selective catalytic reduction of oxides of nitrogen from exhaust gases of motor vehicle diesel engines, provides overstoichiometric supply of NH3 or materials releasing NH3. A first sensor records the NH3 concentration contained in the exhaust gas and interrupts the supply of the NH3 quantity when a specified upper threshold value is reached. A second sensor records the NH3 adsorbed in the catalyzer, by way of which the NH3 supply is resumed on reaching a spec...

대표
청구항
▼

An exhaust gas aftertreatment device for an internal combustion engine having a catalyzer for selective catalytic reduction of oxides of nitrogen from exhaust gas, comprising a metering appliance for an overstoichiometric supply of one of NH3 and materials releasing NH3, and at least one NH3 sensor configured to interrupt the supply when an NH3 quantity exceeds a specified upper threshold value, and an NH3 sensor configured to recognize a specific lower threshold value of a stored NH3 quantity and to resume the supply when, in the catalyzer, the stored N...

이 특허를 인용한 특허 피인용횟수: 67

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