[특허]Combustion box exhaust filtration system and method

Combustion box exhaust filtration system and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23J-003/00
출원번호	US-0797701 (1991-11-25)
우선권정보	KR-0005855 (1990-04-26)
발명자 / 주소	Rim Julius J. (2743 Bloomfield Crossing Bloomfield Hills MI 48304) Rim Ho (601-4 Sinsa-Dong Kangnam-Ku Seoul KRX)
인용정보	피인용 횟수 : 36 인용 특허 : 0

초록 ▼

A combustion box exhaust filtration system and method which removes both particulate matter (PM) and unburned hydrocarbons (UHC) from the exhaust gases. Two filters in parallel are used, each alternating operation as the other regenerates. Each filter is preferred to be constructed in a conventional manner and operates at between 100 to 300 degrees Centigrade. A microprocessor controlled valve system regulates which filter is active and which is regenerating and/or inactive. PM accumulates at the active filter, with UHC condensing on the PM. Accordingly, only PM and UHC free gasses pass out the exhaust. When the active filter becomes clogged, the microprocessor switches it to inactive status, and switches the other filter to active status. Regeneration of the inactive filter is initiated by the microprocessor using a glow plug at a predetermined location in the filter, in which PM and UHC burn slowly across the entire filter. A recirculation conduit provides for the gases produced by the resulting slow regeneration to be directed to the air intake of the combustion box. Any remaining UHC or PM will be subsequently burned in the combustion box. When regeneration has completed, the inactive filter will await being switched by the microprocessor to active status when the other filter has become sufficiently clogged that it is time for the microprocessor to switch it inactive and thereafter initiate its regeneration.

대표청구항 ▼

A filtration system for removing particulate matter and unburned hydrocarbons from exhaust gas of a combustion box, said filtration system being connected with an exhaust system of the combustion box, the combustion box having an air intake for aspiration, said filtration system comprising: a first filter connected with the exhaust system, said first filter being structured so as to trap particulate matter from the exhaust gas; a second filter connected with the exhaust system, said second filter being structured so as to trap particulate matter from the exhaust gas; first valve means connected with the exhaust system for selecting at least one of said first and second filters for filtering said exhaust gas; exhaust gas cooling means connected with said exhaust system upstream of said first and second filter means for providing a predetermined exhaust gas temperature at said first and second filters whereat said unburned hydrocarbons will condense out of said exhaust gas, raid condensed unburned hydrocarbons at least in part condensing onto said trapped particulate matter; ignition means connected with said first and second filters for selectively initiating regeneration of said first and second filters; catalytic law temperature regeneration means present at each of said first and second filters during the respective regeneration thereof, said catalytic low temperature regeneration means providing for combustion of said particulate matter and said unburned hydrocarbons at a predetermined rate; second valve means connected with said first and second filter means for selectively admitting air into one of said first and second filters when said one of said first and second filters is being regenerated; conduit means for routing combustion gases produced by said combustion in any of said first and second filters to the air intake of the combustion box said predetermined rate of combustion producing said combustion gases at a rate which does not adversely affect combustion performance of the combustion box; and third valve means connected with said conduit means for selectively routing said gases produced by combustion in any of said first and second filters to the air intake of the combustion box.

이 특허를 인용한 특허 (36)

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Gonze, Eugene V.; Santoso, Halim G.; Paratore, Jr., Michael J., System and method for particulate matter filter regeneration using a catalytic converter as a combustor.
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