KR20100064876A - Exhaust gas filter system - Google Patents

Exhaust gas filter system Download PDF

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Publication number
KR20100064876A
KR20100064876A KR1020080123525A KR20080123525A KR20100064876A KR 20100064876 A KR20100064876 A KR 20100064876A KR 1020080123525 A KR1020080123525 A KR 1020080123525A KR 20080123525 A KR20080123525 A KR 20080123525A KR 20100064876 A KR20100064876 A KR 20100064876A
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South Korea
Prior art keywords
coating layer
filter
exhaust gas
washcoat
thickness
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KR1020080123525A
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Korean (ko)
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서정민
권충일
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현대자동차주식회사
기아자동차주식회사
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Priority to KR1020080123525A priority Critical patent/KR20100064876A/en
Priority to US12/466,174 priority patent/US20100139261A1/en
Priority to DE102009022270A priority patent/DE102009022270A1/en
Publication of KR20100064876A publication Critical patent/KR20100064876A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/247—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2474—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the walls along the length of the honeycomb
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2482—Thickness, height, width, length or diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/19—Catalysts containing parts with different compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0006—Honeycomb structures
    • C04B38/0009—Honeycomb structures characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/60—Discontinuous, uneven properties of filter material, e.g. different material thickness along the longitudinal direction; Higher filter capacity upstream than downstream in same housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • F01N2510/0682—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having a discontinuous, uneven or partially overlapping coating of catalytic material, e.g. higher amount of material upstream than downstream or vice versa

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geometry (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Ceramic Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

PURPOSE: An exhaust gas filter system is provided to improve regeneration efficiency while preventing increase of back pressure by reducing a thickness of a catalyst coating layer on a rear end part, and to improve fuel efficiency. CONSTITUTION: An exhaust gas filter system comprises an asymmetric diesel particulate filter in which a small channel(310) is formed. On the channel, a first coating layer(500) formed by coating an inner side of the front surface with first wash-coat, and a second coating layer(505) formed by coating the inner side of the rear surface with second wash-coat. A thickness of the second coating layer is thicker or the same with the thickness of the first coating layer.

Description

배기가스 필터 시스템 {EXHAUST GAS FILTER SYSTEM}Exhaust Gas Filter System {EXHAUST GAS FILTER SYSTEM}

본 발명은 배기가스 필터 시스템에 관한 것으로서, 보다 상세하게는 배기가스의 배압을 저감시키고 입자상 물질의 제거효율이 향상된 배기가스 필터 시스템에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas filter system, and more particularly, to an exhaust gas filter system which reduces back pressure of exhaust gas and improves the removal efficiency of particulate matter.

일반적으로 엔진의 배기시스템은 배기 가스를 차량의 후방으로 배출하는 기능과 배기음을 저감시키는 기능을 한다.In general, the exhaust system of the engine functions to discharge the exhaust gas to the rear of the vehicle and to reduce the exhaust sound.

최근들어 배기가스를 정화하기 위해서 촉매장치가 사용되고 있으며, 이들은 유해한 배기가스를 무해한 이산화탄소 및 물로 변환한다.In recent years, catalytic devices have been used to purify exhaust gases, which convert harmful emissions into harmless carbon dioxide and water.

특히, 촉매장치는 탄화수소, 일산화탄소, 질소산화물(NOx)을 저감시킨다. 또한, 촉매장치는 입자상 물질을 포집하거나 태운다. 일반적으로 디젤에서 배출되는 입자상물질을 물리적으로 포집하여 연소시키는 촉매장치를 디젤매연여과장치(DPF, Diesel Particulate Filter) 라 일컬으며, 이러한 디젤매연여과장치는 배기 가스 흐름 방향으로 여러 개의 채널들이 형성된다.In particular, the catalytic device reduces hydrocarbons, carbon monoxide and nitrogen oxides (NOx). The catalytic device also collects or burns particulate matter. In general, a catalytic device that physically collects and burns particulate matter discharged from diesel is called a diesel particulate filter (DPF), and the diesel particulate filter has a plurality of channels formed in an exhaust gas flow direction. .

아울러, 상기 채널들 중 적어도 하나는 입구가 패쇄되고 출구가 개방되며, 상기 채널들 중 적어도 하나는 입구가 개방되고, 출구가 폐쇄되되, 입구 또는 출구 의 폐쇄된 부분이 교대로 배치되는 구조를 갖는다.In addition, at least one of the channels has a structure in which the inlet is closed and the outlet is open, and at least one of the channels is the inlet is opened, the outlet is closed, and the closed part of the inlet or outlet is alternately arranged. .

한편, 촉매장치 중에서 디젤 산화촉매(DOC: diesel oxidation catalyst) 및 촉매 여과필터(CPF: Catalyzed Particulate Filter)가 적용되는데, 이들은 입자상 물질들(PM: Particular Matters)을 포집하고 제거한다.On the other hand, diesel oxidation catalyst (DOC) and Catalyzed Particulate Filter (CPF) are applied among the catalyst devices, and they collect and remove particulate matter (PM).

한편, 필터에는 고가의 SiC 또는 AT재질의 필터가 사용되고, 상기 필터의 입자상물질 포집 유효체적을 증가시키기 위해서 비대칭 필터가 적용되고 있다. 그러나, 입자상 물질이 포집되면서 배압이 증가하여 연비가 악화되는 문제점이 있다.On the other hand, an expensive SiC or AT filter is used for the filter, and an asymmetric filter is used to increase the effective volume of particulate matter trapping of the filter. However, there is a problem in that fuel efficiency is worsened by increasing the back pressure as the particulate matter is collected.

본 발명의 목적은 배기가스 배압이 증가하는 것을 미연에 방지하고 재생효율이 향상된 배기가스 필터 시스템을 제공하는 것이다.It is an object of the present invention to provide an exhaust gas filter system which prevents an increase in the exhaust gas back pressure in advance and improves the regeneration efficiency.

이러한 목적을 달성하기 위한 본 발명에 따른 배기가스 필터 시스템은, 개방된 입구의 직경이 크고, 후단면 폐쇄된 출구부의 직경이 작은 채널이 형성된 비대칭 디젤 여과 필터에 있어서, 상기 채널의 전단부 내측면에 제1와시코트를 코팅하여 형성되는 제1코팅층, 및 상기 채널의 후단부 내측면에 제2와시코트를 코팅하여 형성되는 제2코팅층을 포함하고, 상기 2코팅층의 두께는 상기 제1코팅층의 두께와 동일 또는 작게 형성되는 것을 특징으로 한다.Exhaust gas filter system according to the present invention for achieving this object is asymmetric diesel filtration filter having a large diameter of the open inlet, a small diameter of the outlet portion of the closed rear end face, the inner surface of the front end of the channel A first coating layer formed by coating a first washer coat, and a second coating layer formed by coating a second washer coat on the inner side surface of the rear end of the channel, wherein the thickness of the second coating layer is that of the first coating layer. It is characterized by being formed equal to or smaller than the thickness.

상기 제1코팅층은 상기 필터의 길이 방향 중심부를 중심으로 전단부에 형성되고, 상기 제2코팅층은 상기 중심부를 기준으로 필터의 길이 방향 중심부를 기준 으로 후단부에 형성된다.The first coating layer is formed at the front end with respect to the longitudinal center of the filter, and the second coating layer is formed at the rear end with respect to the longitudinal center of the filter with respect to the center.

상기 제1코팅층을 위한 상기 제1와시코트의 양은 상기 제2코팅층을 위한 상기 제2와시코트의 양의 약 2배인 것을 특징으로 한다.The amount of the first washcoat for the first coating layer is about twice the amount of the second washcoat for the second coating layer.

상기 제1와시코트에 포함된 귀금속과 상기 제2와시코트에 포함된 귀금속의 총량(g)은 같고, 귀금속의 농도(g/L)는 변동하는 것을 특징으로 한다.The total amount (g) of the noble metal contained in the first wash coat and the noble metal contained in the second wash coat is the same, and the concentration (g / L) of the noble metal is varied.

상기 필터에는, 배기 가스 흐름 방향으로 여러 개의 상기 채널들이 형성되고, 상기 채널들 중 적어도 하나는 입구가 패쇄되고 출구가 개방되며, 상기 채널들 중 적어도 하나는 입구가 개방되고, 출구가 폐쇄되되, 입구 또는 출구의 폐쇄된 부분이 교대로 배치된다.In the filter, a plurality of the channels are formed in the exhaust gas flow direction, at least one of the channels is closed at the inlet and the outlet is opened, at least one of the channels is at the inlet is opened, and the outlet is closed, The closed portions of the inlet or outlet are alternately arranged.

상기 필터의 상기 전단부를 상기 제1와시코트 액에 담그고, 상기 후단부를 상기 제2와시코트 액에 담가서 상기 제1코팅층과 상기 제2코팅층을 형성한다.The front end of the filter is immersed in the first washcoat liquid, and the rear end is immersed in the second washcoat liquid to form the first coating layer and the second coating layer.

상기 제1와시코트의 양를 조절하여 상기 제1코팅층의 두께와 상기 제2코팅층의 두께를 조절하는 것을 특징으로 한다.The thickness of the first coating layer and the thickness of the second coating layer is adjusted by adjusting the amount of the first wash coat.

상술한 바와 같이 본 발명에 따른 배기가스 필터 시스템에 의하면, 후단부의 촉매 코팅층의 두께를 줄여서 배압이 증가하는 것을 미연에 방지하고 재생효율을 향상시킨다.As described above, according to the exhaust gas filter system according to the present invention, by reducing the thickness of the catalyst coating layer at the rear end, it is possible to prevent the back pressure from increasing and improve the regeneration efficiency.

이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 배기가스 필터 시스템의 개략적인 구성도이다.1 is a schematic diagram of an exhaust gas filter system according to an exemplary embodiment of the present invention.

도 1을 참조하면, 100은 디젤 엔진을 지시하고, 110은 배기파이프를 지시하며, 120은 디젤 여과 필터 (DPF, Diesel Particulate Filter) 를 지시한다.Referring to FIG. 1, 100 indicates a diesel engine, 110 indicates an exhaust pipe, and 120 indicates a diesel particulate filter (DPF).

상기 디젤 여과 필터(120)는 배기가스에 포함된 매연(soot)을 포함하는 입자상 물질(PM: Particular Matter)을 중점적으로 포집하고 제거한다.The diesel filtration filter 120 mainly collects and removes particulate matter (PM) including soot contained in exhaust gas.

본 발명의 실시예에서, 상기 디젤 여과 필터(120) 대신에 촉매식 여과필터(CPF: catalyzed particulate filter)가 적용될 수 있음은 당연하다.In the exemplary embodiment of the present invention, a catalyzed particulate filter (CPF) may be applied instead of the diesel filtration filter 120.

도 2는 본 발명의 실시예에 따른 배기가스 필터 시스템에 구비된 필터의 개략적인 측면도이고, 도 3은 도 2의 View A를 도시한 측면도이며, 도 4는 도 2의 View B를 도시한 측면도이다.2 is a schematic side view of a filter provided in an exhaust gas filter system according to an exemplary embodiment of the present invention, FIG. 3 is a side view illustrating View A of FIG. 2, and FIG. 4 is a side view illustrating View B of FIG. 2. to be.

도 2를 참조하면, 상기 디젤 여과 필터(120) 내부에는 입자상 물질을 포집하기 위한 필터(200)가 배치되고, 상기 필터(200)는 길이방향으로 중심부(250)를 기준으로 전단부(230)와 후단부(240)가 형성된다. 그리고, 상기 전단부(230)의 앞에는 전단면(210)이 형성되고, 상기 후단부(240)의 뒤에는 후단면(220)이 형성된다. Referring to FIG. 2, a filter 200 for collecting particulate matter is disposed inside the diesel filtration filter 120, and the filter 200 has a front end 230 based on the central portion 250 in a longitudinal direction. And the rear end 240 is formed. In addition, a front end surface 210 is formed in front of the front end 230, and a rear end surface 220 is formed behind the rear end 240.

도 3 및 도 4를 참조하면, 상기 필터(200)의 상기 전단면(210)에서 상기 후단면(220)으로 배기가스가 통과하는 여러 개의 채널들(310, 320)이 형성된다.3 and 4, a plurality of channels 310 and 320 through which exhaust gas passes from the front end surface 210 of the filter 200 to the rear end surface 220 is formed.

상기 전단면(210)에 형성된 상기 채널들(310, 320)은 교대로 제1플러그(300)로 폐쇄되고, 상기 후단면(220)에 형성된 상기 채널들(310, 320)은 교대로 제2플러그(400)로 폐쇄된다.The channels 310 and 320 formed on the front surface 210 are alternately closed by the first plug 300, and the channels 310 and 320 formed on the rear surface 220 are alternately second. The plug 400 is closed.

좀 더 상세하게는, 상기 전단면(210)의 입구가 개방되고 상기 후단면(220)의 출구가 제2플러그(400)로 폐쇄된 제1채널(310)의 단면적은 상기 필터(200)의 길이방향으로 점차 줄어드는 구조를 갖고 있다.More specifically, the cross-sectional area of the first channel 310 in which the inlet of the front end surface 210 is opened and the outlet of the rear end surface 220 is closed by the second plug 400 is defined by the filter 200. It has a structure that gradually decreases in the longitudinal direction.

반대로, 상기 전단면(210)의 입구가 제1플러그(300)로 폐쇄되고 상기 후단면(220)의 출구가 개방된 제2채널(320)의 단면적은 상기 필터(200)의 길이방향으로 점차 늘어나는 구조를 갖는다.On the contrary, the cross-sectional area of the second channel 320 in which the inlet of the front end surface 210 is closed by the first plug 300 and the outlet of the rear end surface 220 is opened gradually increases in the longitudinal direction of the filter 200. It has an elongated structure.

전술한 바와 같이, 상기 필터(200)는 비대칭 구조를 가지고 있어서, 입자상 물질의 축적량을 효과적으로 증대시킬 수 있고, 상기 필터의 입구를 크게 함으로써 유효체적이 증가하여 필터의 부피 및 생산비용을 동시에 저감시킬 수 있다.As described above, the filter 200 has an asymmetric structure, which can effectively increase the accumulation amount of particulate matter and increase the effective volume by increasing the inlet of the filter, thereby simultaneously reducing the volume and production cost of the filter. Can be.

도 5는 도 2의 Ⅴ-Ⅴ선 및 Ⅵ-Ⅵ선에 따른 필터의 단면 상세도이다.FIG. 5 is a detailed cross-sectional view of the filter taken along the VV and VI-VI lines of FIG. 2.

도 5를 참조하면, 상기 필터(200)의 상기 전단부(230)에 형성된 상기 제1채널(310)의 내측면에는 제1코팅층(500)이 형성되고, 상기 필터(200)의 상기 후단부(240)에 형성된 상기 제1채널(310)의 내측면에는 제2코팅층(505)이 형성된다.Referring to FIG. 5, a first coating layer 500 is formed on an inner surface of the first channel 310 formed in the front end 230 of the filter 200, and the rear end of the filter 200. A second coating layer 505 is formed on an inner side surface of the first channel 310 formed at 240.

상기 제1코팅층(500)의 두께(d1)와 상기 제2코팅층(505)의 두께(d2)는 서로 동일하게 형성 되거나 상기 제1코팅층의 두께가 상기 제2코팅층보다 커서 상기 필터(200)의 뒤쪽으로 갈수록 배압이 증가하는 것을 방지할 수 있다. The thickness d1 of the first coating layer 500 and the thickness d2 of the second coating layer 505 are the same, or the thickness of the first coating layer is larger than that of the second coating layer, so that the filter 200 The back pressure can be prevented from increasing backwards.

즉, 상기 제2코팅층에서 형성되는 배압을 저감시키고 엔진에서 배출되는 Ash 와 soot가 후단면에 쌓이게 함으로써 전체적인 배기시스템의 배압을 저감시킬 수 있다.That is, by reducing the back pressure formed in the second coating layer and the ash and soot discharged from the engine are accumulated on the rear end surface, the back pressure of the entire exhaust system can be reduced.

도 6은 본 발명의 실시예에 따른 필터에 적용되는 와시코트의 특징을 도시한 테이블이다.6 is a table showing the features of the washcoat applied to the filter according to an embodiment of the present invention.

도 6을 참조하면, 상기 필터(200)의 상기 전단부(230)에 형성되는 상기 제1코팅층(500)을 형성하기 위해서 제1와시코트가 사용되고, 상기 후단부(240)에 형성되는 상기 제2코팅층(505)을 형성하기 위해서 제2와시코트가 사용된다.Referring to FIG. 6, a first wash coat is used to form the first coating layer 500 formed on the front end 230 of the filter 200, and the first formed on the rear end 240. A second washcoat is used to form the two coating layer 505.

본 발명의 실시예에서, 상기 제1와시코트의 부피는 상기 제2와시코트의 부피보다 많다. In an embodiment of the invention, the volume of the first washcoat is greater than the volume of the second washcoat.

전술한 바와 같이, 상기 제1코팅층(500)의 두께(d1)와 상기 제2코팅층(505)의 두께(d2)가 동일하므로 상기 채널의 내측면 면적이 넓은 부분에 사용되는 상기 제1와시코트의 양이 많다. 좀 더 상세하게는, 상기 제1와시코트의 양은 상기 제2와시코트의 양의 두 배이다.As described above, since the thickness d1 of the first coating layer 500 and the thickness d2 of the second coating layer 505 are the same, the first washer coat used in a portion having a large inner surface area of the channel. The amount is large. More specifically, the amount of the first washcoat is twice the amount of the second washcoat.

상기 필터(200)의 상기 후단부(240)에 주로 입자상 물질이 포집되어 적체되기 때문에 상기 후단부(240)에 형성된 상기 제2코팅층(505)의 두께가 두꺼운 경우, 오일첨가제로부터 야기되는 재(ash)와 매연(soot)이 필터의 전단부 또는 내부 벽면에 쌓여 배압이 증가하거나 입자상 물질의 제거 효율이 떨어지는 문제점이 있다. When the second coating layer 505 formed in the rear end 240 is thick because the particulate matter is collected and accumulated in the rear end 240 of the filter 200, the ash caused by the oil additive ( Ash and soot are accumulated on the front end or the inner wall of the filter to increase the back pressure or to reduce the removal efficiency of particulate matter.

그러나 본 발명의 실시예에서는 상기 제2코팅층(505)의 두께를 상기 제1코팅층(500)의 두께와 동일하게 형성하여 Ash와 soot가 정상적으로 필터의 후단부에 쌓이게 함으로써 배압을 저감시키고 재생효율을 향상시킬 수 있다.However, in the exemplary embodiment of the present invention, the thickness of the second coating layer 505 is the same as that of the first coating layer 500 so that ash and soot are normally accumulated at the rear end of the filter, thereby reducing the back pressure and improving the regeneration efficiency. Can be improved.

상기 필터(200)에 형성된 상기 채널들(310, 320)의 내측면을 코팅하는 방법은 상기 필터(200)를 와시코트 액에 상기 전단부(230) 또는 상기 후단부240를 담금으로써 가능하고, 상기 채널(310, 320)의 직경이 작은 경우 동일 와시코트량을 코 팅하면 상대적으로 전단부의 직경이 큰 경우보다 상기 와시코트가 두껍게 코팅된다. The method of coating the inner surfaces of the channels 310 and 320 formed in the filter 200 may be performed by dipping the filter 200 in the washcoat liquid by dipping the front end 230 or the rear end 240. If the diameter of the channel (310, 320) is small, if the same amount of washcoat is coated, the washcoat is thicker than the case where the diameter of the front end portion is relatively large.

이러한 경우 상기 필터(200)의 상기 후단부(240)에 형성되는 상기 제2코팅층(505)의 두께가 두꺼워 질 수 있으나, 본 발명의 실시예에서는 상기 제2코팅층(505)에 사용되는 제2와시코트의 양을 상기 제1와시코트의 양보다 작게하여 상기 제2코팅층(505)의 두께를 얇게 조절할 수 있다.In this case, the thickness of the second coating layer 505 formed on the rear end 240 of the filter 200 may be thick, but in the embodiment of the present invention, the second coating layer 505 is used. The thickness of the second coating layer 505 may be adjusted to be thin by making the amount of the wash coat smaller than the amount of the first wash coat.

아울러, 본 발명의 실시예에서는 상기 제2코팅층(505)에 사용되는 제2와시코트를 형성하는 온도를 상기 제1와시코트를 형성하는 온도보다 높게 설정하여 두께를 얇게 조절할 수 있다.In addition, in the embodiment of the present invention, the temperature for forming the second washer coat used for the second coating layer 505 may be set higher than the temperature for forming the first washer coat so that the thickness may be adjusted to be thin.

이상으로 본 발명에 관한 바람직한 실시예를 설명하였으나, 본 발명은 상기 실시예에 한정되지 아니하며, 본 발명의 실시예로부터 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의한 용이하게 변경되어 균등하다고 인정되는 범위의 모든 변경을 포함한다. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

도 1은 본 발명의 실시예에 따른 배기가스 필터 시스템의 개략적인 구성도이다.1 is a schematic diagram of an exhaust gas filter system according to an exemplary embodiment of the present invention.

도 2는 본 발명의 실시예에 따른 배기가스 필터 시스템에 구비된 필터의 개략적인 측면도이다.2 is a schematic side view of a filter provided in an exhaust gas filter system according to an exemplary embodiment of the present invention.

도 3은 도 2의 View A를 도시한 측면도이다.FIG. 3 is a side view illustrating View A of FIG. 2.

도 4는 도 2의 View B를 도시한 측면도이다.4 is a side view illustrating View B of FIG. 2.

도 5는 도 2의 Ⅴ-Ⅴ선 및 Ⅵ-Ⅵ선에 따른 필터의 단면 상세도이다.FIG. 5 is a detailed cross-sectional view of the filter taken along the VV and VI-VI lines of FIG. 2.

도 6은 본 발명의 실시예에 따른 필터에 적용되는 와시코트의 특징을 도시한 테이블이다.6 is a table showing the features of the washcoat applied to the filter according to an embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100: 엔진100: engine

110: 배기파이프110: exhaust pipe

120: 디젤 여과 필터120: diesel filtration filter

200: 필터200: filter

210: 전단면210: shear surface

220: 후단면220: back section

230: 전단부230: shear

240: 후단부240: rear end

310: 제1채널310: first channel

320: 제2채널320: second channel

300: 제1플러그300: first plug

400: 제2플러그400: second plug

500: 제1코팅층500: first coating layer

505: 제2코팅층505: second coating layer

Claims (7)

개방된 입구의 직경이 크고, 후단면 폐쇄된 출구부의 직경이 작은 채널이 형성된 비대칭 디젤 여과 필터에 있어서,In the asymmetric diesel filtration filter in which a large diameter of the open inlet and a small diameter of the outlet of the closed rear end face is formed, 상기 채널의 전단부 내측면에 제1와시코트를 코팅하여 형성되는 제1코팅층; 및A first coating layer formed by coating a first washer coat on an inner surface of a front end portion of the channel; And 상기 채널의 후단부 내측면에 제2와시코트를 코팅하여 형성되는 제2코팅층;을 포함하고,And a second coating layer formed by coating a second washer coat on the inner side of the rear end of the channel. 상기 2코팅층의 두께는 상기 제1코팅층의 두께와 동일 또는 작게 형성되는 것을 특징으로 하는 배기가스 필터 시스템.The thickness of the two coating layer is the exhaust gas filter system, characterized in that formed in the same or smaller than the thickness of the first coating layer. 제1 항에 있어서,According to claim 1, 상기 제1코팅층은 상기 필터의 길이 방향 중심부를 중심으로 전단부에 형성되고, 상기 제2코팅층은 상기 중심부를 기준으로 필터의 길이 방향 중심부를 기준으로 후단부에 형성되는 배기가스 필터 시스템.The first coating layer is formed in the front end with respect to the longitudinal center of the filter, the second coating layer is formed in the rear end with respect to the longitudinal center of the filter with respect to the center. 제2 항에 있어서,The method of claim 2, 상기 제1코팅층을 위한 상기 제1와시코트의 양은 상기 제2코팅층을 위한 상기 제2와시코트의 양의 약 2배인 것을 특징으로 하는 배기가스 필터 시스템.And the amount of the first washcoat for the first coating layer is about twice the amount of the second washcoat for the second coating layer. 제3 항에 있어서,The method of claim 3, 상기 제1와시코트에 포함된 귀금속과 상기 제2와시코트에 포함된 귀금속의 총량(g)은 같고, 귀금속의 농도(g/L)는 변동하는 것을 특징으로 하는 배기가스 필터 시스템.The total amount (g) of the noble metal contained in the first washcoat and the noble metal contained in the second washcoat is the same, and the concentration (g / L) of the noble metal is varied. 제1 항에 있어서,According to claim 1, 상기 필터에는,In the filter, 배기 가스 흐름 방향으로 여러 개의 상기 채널들이 형성되고, 상기 채널들 중 적어도 하나는 입구가 패쇄되고 출구가 개방되며, 상기 채널들 중 적어도 하나는 입구가 개방되고, 출구가 폐쇄되되, 입구 또는 출구의 폐쇄된 부분이 교대로 배치되는 배기가스 필터 시스템.A plurality of said channels are formed in the direction of the exhaust gas flow, at least one of the channels being closed at the inlet and the outlet being open, at least one of the channels having the inlet open and the outlet closed, Exhaust gas filter system in which closed sections are alternately arranged. 제1 항에 있어서,According to claim 1, 상기 필터의 상기 전단부를 상기 제1와시코트 액에 담그고, 상기 후단부를 상기 제2와시코트 액에 담가서 상기 제1코팅층과 상기 제2코팅층을 형성하는 배기가스 필터 시스템.And dipping the front end portion of the filter into the first washcoat liquid and forming the first coating layer and the second coating layer by dipping the rear end portion into the second washcoat liquid. 제6 항에 있어서,The method according to claim 6, 상기 제1와시코트의 양를 조절하여 상기 제1코팅층의 두께와 상기 제2코팅층의 두께를 조절하는 것을 특징으로 하는 배기가스 필터 시스템.And controlling the thickness of the first coating layer and the thickness of the second coating layer by adjusting the amount of the first washer coat.
KR1020080123525A 2008-12-05 2008-12-05 Exhaust gas filter system KR20100064876A (en)

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