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특허 상세정보

Lean-burn nox catalyst/nox trap system

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01N-003/00   
미국특허분류(USC) 60/297 ; 60/274 ; 423/213.7
출원번호 US-0569517 (1995-12-08)
발명자 / 주소
  • Hepburn Jeffrey Scott
출원인 / 주소
  • Ford Global Technologies, Inc.
대리인 / 주소
    Melotik
인용정보 피인용 횟수 : 79  인용 특허 : 7
초록

The invention is a catalyst system for purifying exhaust gases generated by a lean-burn internal combustion engine, particularly automotive engines. The catalyst system comprises two separate components located in the exhaust gas passage, the first being a lean-burn nitrogen oxide catalyst and the second being a nitrogen oxide trap material, where the lean-burn NOx catalyst is located upstream of the NOx trap material in the exhaust gas passage. Preferably the catalyst comprises a transition metal such as copper, chromium, iron, cobalt, or manganese load...

대표
청구항

[ We claim:] [1.] A catalyst system, located in the exhaust gas passage of a lean-burn internal combustion engine, useful for converting carbon monoxide, nitrogen oxides, and hydrocarbons present in the exhaust gas, said catalyst system comprising two-components:(1) lean-burn nitrogen oxide catalyst being a transition metal selected from the group consisting of copper, chromium, iron, cobalt, nickel, iridium, cadmium, silver, gold, platinum, manganese, and mixtures thereof (i) loaded on a refractory oxide or (ii) exchanged into zeolite, wherein said tran...

이 특허를 인용한 특허 (79)

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