JPH07279652A - Catalyst device for purifying exhaust gas - Google Patents
Catalyst device for purifying exhaust gasInfo
- Publication number
- JPH07279652A JPH07279652A JP6075947A JP7594794A JPH07279652A JP H07279652 A JPH07279652 A JP H07279652A JP 6075947 A JP6075947 A JP 6075947A JP 7594794 A JP7594794 A JP 7594794A JP H07279652 A JPH07279652 A JP H07279652A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- flow
- gas purifying
- capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 175
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 238000000746 purification Methods 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000004913 activation Effects 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 55
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 229910052703 rhodium Inorganic materials 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003863 metallic catalyst Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
- F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- 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
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は排気ガス浄化用触媒装置
に関するもので、例えば自動車用内燃機関に用いて好適
なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying catalyst device, which is suitable for use in, for example, an automobile internal combustion engine.
【０００２】[0002]
【従来の技術】従来のこの種の触媒装置は、図９に示す
ごとき構成であって、触媒を担持したハニカム構造の金
属製触媒担体Ｃを金属製外筒Ｓ内にろう付け、レーザ溶
接等の方法で固定するものであって、Ｇは排気ガスの流
れを示す。2. Description of the Related Art A conventional catalyst device of this type has a structure as shown in FIG. 9, in which a metal catalyst carrier C having a honeycomb structure carrying a catalyst is brazed in a metal outer cylinder S, laser welding, etc. In the above method, G indicates the flow of exhaust gas.
【０００３】[0003]
【発明が解決しようとする課題】ところで、内燃機関の
運転を停止した後、ある程度の時間経過後に、内燃機関
を再始動すると、触媒装置の温度が周囲温度付近まで低
下しているので、内燃機関再始動後、触媒活性化温度に
達するまでに時間がかかり、内燃機関再始動時における
排気ガス浄化性能が低下するという問題がある。However, when the internal combustion engine is restarted after a certain amount of time has elapsed after the internal combustion engine was stopped, the temperature of the catalyst device has dropped to around ambient temperature. After restarting, it takes time to reach the catalyst activation temperature, and there is a problem that the exhaust gas purification performance at the time of restarting the internal combustion engine deteriorates.
【０００４】特に、触媒担体が金属製の場合は、熱伝導
性がよいので、内燃機関停止後に短時間で温度が触媒活
性化温度より低い温度まで低下するので、上記再始動時
における排気ガス浄化性能の低下がより顕著となる。In particular, when the catalyst carrier is made of metal, it has good thermal conductivity, so that the temperature drops to a temperature lower than the catalyst activation temperature in a short time after the internal combustion engine is stopped. The decrease in performance becomes more noticeable.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するため、請求項１記載の発明は、排気ガス通路の上流
側に設置され、容量の小さい第１の触媒手段と、この第
１の触媒手段の下流側に設置され、この第１の触媒手段
より容量の大きい第２の触媒手段と、前記第１の触媒手
段の上流側に設置され、前記第１の触媒手段の中心部に
流入しようとする排気ガスの流れを中心部から外周側に
偏流させる偏流手段と、を備えるという技術的手段を採
用する。In order to achieve the above object, the present invention provides a first catalyst means having a small capacity, which is installed on the upstream side of an exhaust gas passage. Second catalyst means installed downstream of the first catalyst means and having a larger capacity than the first catalyst means, and installed upstream of the first catalyst means in the central portion of the first catalyst means. The technical means is provided, which includes a biasing means for biasing the flow of the exhaust gas, which is about to flow in, from the central portion to the outer peripheral side.
【０００６】また、請求項２記載の発明は、前記第１の
触媒手段及び第２の触媒手段が、金属製の触媒担体とこ
の触媒担体に担持された触媒からなるという技術的手段
を採用する。また、請求項３記載の発明は、前記第１の
触媒手段及び第２の触媒手段が、セラミック製の触媒担
体とこの触媒担体に担持された触媒からなるという技術
的手段を採用する。The invention according to claim 2 adopts a technical means in which the first catalyst means and the second catalyst means are composed of a metal catalyst carrier and a catalyst supported on the catalyst carrier. . The invention according to claim 3 employs a technical means in which the first catalyst means and the second catalyst means are composed of a catalyst carrier made of ceramics and a catalyst carried on the catalyst carrier.
【０００７】また、請求項４記載の発明は、前記偏流手
段が、前記第１の触媒手段に一体に固定されているとい
う技術的手段を採用する。また、請求項５記載の発明
は、前記偏流手段及び前記第１の触媒手段がともに金属
製であり、この両手段が一体に固定されているという技
術的手段を採用する。Further, the invention according to claim 4 adopts a technical means in which the biasing means is integrally fixed to the first catalyst means. Further, the invention according to claim 5 employs a technical means in which both the non-uniform flow means and the first catalyst means are made of metal, and these both means are integrally fixed.
【０００８】また、請求項６記載の発明は、前記第１の
触媒手段が、排気ガス流れ方向に平行な多数の独立した
通路を有するハニカム構造に形成されており、前記第１
の触媒手段のうち、前記偏流手段によって偏流された排
気ガスの流れを受ける部位に、前記ハニカム構造の通路
相互間で気流が通過できる連通手段を備えるという技術
的手段を採用する。In the invention according to claim 6, the first catalyst means is formed in a honeycomb structure having a large number of independent passages parallel to the exhaust gas flow direction.
In the catalytic means, the technical means is employed in which, in a portion that receives the flow of the exhaust gas that is biased by the biased flow means, a communication means that allows airflow to pass between the passages of the honeycomb structure is adopted.
【０００９】また、請求項７記載の発明は、前記連通手
段が、前記ハニカム構造の通路の壁部に開けられた穴
と、この穴を通過する気流を案内するルーバとから構成
されているという技術的手段を採用する。また、請求項
８記載の発明は、前記偏流手段が、前記第１の触媒手段
の上流側において排気ガス流の中心部に、円錐形状の先
端が上流側に向くように設置された円錐状部材からなる
という技術的手段を採用する。According to the invention of claim 7, the communicating means is composed of a hole formed in a wall portion of the passage of the honeycomb structure and a louver for guiding an air flow passing through the hole. Adopt technical means. Further, the invention according to claim 8 is that a conical member is provided in which the non-uniform flow means is installed upstream of the first catalyst means in a central portion of the exhaust gas flow so that a tip end of the conical shape faces the upstream side. Adopt the technical means of consisting of.
【００１０】また、請求項９記載の発明は、前記偏流手
段が、前記第１の触媒手段の上流側において排気ガス流
の中心部に位置する小径部が上流側に向くように設置さ
れた先細り円筒状部材からなるという技術的手段を採用
する。また、請求項１０記載の発明は、前記第１の触媒
手段の容量が、前記第２の触媒手段の容量の５０％以下
であるという技術的手段を採用する。Further, in the present invention as defined in claim 9, the biasing means is provided such that the small diameter portion located at the center of the exhaust gas flow on the upstream side of the first catalyst means faces the upstream side. The technical means of being a cylindrical member is adopted. The invention according to claim 10 employs a technical means in which the capacity of the first catalyst means is 50% or less of the capacity of the second catalyst means.
【００１１】[0011]
【発明の作用効果】請求項１記載の発明によれば、上記
技術的手段を有しているため、排気ガス流の上流側に位
置する第１の触媒手段の容量が小さく、熱容量が小さ
い。しかも、これに加え排気ガス通路の中心部に集中す
る傾向にある排気ガスの流れを偏流手段により第１の触
媒手段の外周側に偏流、拡散することができる。その結
果、熱容量が小さく、昇温しやすい第１の触媒手段を、
その外周側まで拡散した排気ガスからの伝熱、及び排気
ガスと触媒との反応熱により、短時間のうちに速やかに
触媒活性化温度まで上昇させることができ、内燃機関再
始動時における排気ガス浄化性能を効果的に向上でき
る。According to the invention described in claim 1, since it has the above technical means, the capacity of the first catalyst means located upstream of the exhaust gas flow is small and the heat capacity is small. Moreover, in addition to this, the flow of the exhaust gas, which tends to be concentrated in the central portion of the exhaust gas passage, can be diverted and diffused toward the outer peripheral side of the first catalyst means by the diverging means. As a result, the first catalyst means, which has a small heat capacity and is easily heated,
Due to the heat transfer from the exhaust gas that has diffused to the outer peripheral side and the heat of reaction between the exhaust gas and the catalyst, the catalyst activation temperature can be quickly raised in a short time. The purification performance can be effectively improved.
【００１２】ここで、機関始動直後の暖機運転時には、
一般に機関回転数が低く、排気ガス流量が少ないので、
容量の小さい第１の触媒手段の浄化作用によって排気浄
化能力を満足できる。一方、暖機運転時の間に容量の大
きい第２の触媒手段の温度も活性化温度まで上昇するの
で、暖機運転終了後の通常運転時には第１、第２の触媒
手段の浄化作用の組合せによって排気ガスの浄化を充分
行うことができる。Here, during warm-up operation immediately after the engine is started,
Generally, the engine speed is low and the exhaust gas flow rate is low,
Exhaust gas purification performance can be satisfied by the purification action of the first catalyst means having a small capacity. On the other hand, during the warm-up operation, the temperature of the second catalyst means having a large capacity also rises to the activation temperature. Therefore, during the normal operation after the warm-up operation is completed, the exhaust gas is exhausted by the combination of the purifying actions of the first and second catalyst means. The gas can be sufficiently purified.
【００１３】請求項２記載の発明によれば、上記第１、
第２の触媒手段の触媒担体を金属製としているから、請
求項１記載の発明による上記効果が得られると同時に、
触媒装置の耐振性等を向上できる。請求項３記載の発明
によれば、上記第１、第２の触媒手段の触媒担体をセラ
ミック製としているから、請求項１記載の発明による上
記効果が得られると同時に、触媒装置の高温耐熱性等を
向上できる。According to the invention of claim 2, the first,
Since the catalyst carrier of the second catalyst means is made of metal, at the same time the above effect according to the invention of claim 1 is obtained,
The vibration resistance of the catalyst device can be improved. According to the invention of claim 3, since the catalyst carrier of the first and second catalyst means is made of ceramic, the effect of the invention of claim 1 can be obtained, and at the same time, high temperature heat resistance of the catalyst device. Etc. can be improved.
【００１４】請求項４記載の発明によれば、上記偏流手
段を第１の触媒手段に一体に固定しているから、この両
手段を一体にして同時に排気ガス通路内に組付けること
ができ、組付作業性を向上できる。請求項５記載の発明
によれば、上記請求項４記載の発明の効果に加え、上記
偏流手段と第１の触媒手段とを金属製として、強固に結
合できるので、耐振性等を向上できる。According to the fourth aspect of the present invention, since the biasing means is integrally fixed to the first catalyst means, both of these means can be integrated and simultaneously assembled in the exhaust gas passage, Assembly workability can be improved. According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, since the non-uniform flow means and the first catalyst means are made of metal and can be firmly coupled, vibration resistance and the like can be improved.
【００１５】請求項６記載の発明によれば、上記偏流手
段によって偏流された排気ガスの流れが、第１の触媒手
段のハニカム構造に設けた連通手段によりハニカム構造
の通路相互間を通過して、ハニカム構造内を容易に拡散
でき、排気ガスと触媒との接触面積を増加でき、その結
果触媒担体が冷えている状態でも触媒の活性化が促進さ
れ、低温時の浄化能力をより一層向上できる。According to the sixth aspect of the present invention, the flow of the exhaust gas, which is biased by the biasing means, passes between the passages of the honeycomb structure by the communicating means provided in the honeycomb structure of the first catalyst means. , The honeycomb structure can be easily diffused, the contact area between the exhaust gas and the catalyst can be increased, and as a result, the activation of the catalyst is promoted even when the catalyst carrier is cold, and the purification capacity at low temperatures can be further improved. .
【００１６】請求項７記載の発明によれば、上記連通手
段を、ハニカム構造の通路壁部に設けた穴と、この穴を
通過する気流を案内するルーバとから構成しているか
ら、上記請求項６記載の発明における排気ガスのハニカ
ム構造への拡散効果をより効果的に発揮できる。請求項
８または請求項９記載の発明によれば、上記偏流手段
を、円錐状部材または先細り円筒状部材で構成して、排
気ガス通路の中心部から排気ガスをスムーズに外周側へ
偏流、拡散させることができる。According to the invention described in claim 7, the communicating means comprises a hole provided in the passage wall portion of the honeycomb structure and a louver for guiding an air flow passing through the hole. The effect of diffusing exhaust gas into the honeycomb structure according to the invention of Item 6 can be more effectively exhibited. According to the invention described in claim 8 or claim 9, the drift means is constituted by a conical member or a tapered cylindrical member, and the exhaust gas is smoothly drifted or diffused from the center of the exhaust gas passage to the outer peripheral side. Can be made.
【００１７】請求項１０記載の発明によれば、上記第１
の触媒手段の容量を、前記第２の触媒手段の容量の５０
％以下とすることにより、低温始動時における第１の触
媒手段の活性化をより一層速めることができる。According to a tenth aspect of the invention, the first
The capacity of the catalyst means of 50 times the capacity of the second catalyst means
When it is at most%, the activation of the first catalyst means at the time of low temperature start can be further accelerated.
【００１８】[0018]
【実施例】以下、本発明を図に示す実施例について説明
する。図１〜図６は自動車用内燃機関に本発明装置を適
用した第１実施例を示すもので、図４において、１は自
動車用内燃機関、２はその排気マニホルド、３は排気
管、４は排気ガス中の酸素濃度を検出する酸素センサで
ある。Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment in which the device of the present invention is applied to an automobile internal combustion engine. In FIG. 4, 1 is an automobile internal combustion engine, 2 is an exhaust manifold thereof, 3 is an exhaust pipe, and 4 is an exhaust pipe. It is an oxygen sensor that detects the oxygen concentration in the exhaust gas.
【００１９】５は本発明による触媒装置で、以下の６〜
９の要素から構成されている。６は排気ガス上流側に設
置された、容量の小さい第１の触媒部材（触媒手段）、
７はこの第１の触媒部材６の排気ガス下流側に設置さ
れ、第１の触媒部材６よりも容量の大きい第２の触媒部
材（触媒手段）、８は第１の触媒部材６の排気ガス上流
側に設置され、排気ガスを中心部から外周側へ偏流させ
る偏流部材（偏流手段）、９はこれらを収納している外
筒である。5 is a catalyst device according to the present invention, which comprises
It is composed of 9 elements. 6 is a first catalyst member (catalyst means) having a small capacity installed on the exhaust gas upstream side,
Reference numeral 7 denotes a second catalyst member (catalyst means) which is installed on the exhaust gas downstream side of the first catalyst member 6 and has a capacity larger than that of the first catalyst member 6, and 8 denotes exhaust gas of the first catalyst member 6. A non-uniform flow member (non-uniform flow member) 9 installed on the upstream side and configured to allow the exhaust gas to flow non-uniformly from the central portion to the outer peripheral side is an outer cylinder that houses these.
【００２０】次に、本発明装置の具体的構成を図１〜図
３に基づいて詳述する。第１の触媒部材６は、耐熱性、
耐食性に優れた金属例えばフェライト系耐熱ステンレス
（ＳＵＳ４３０）で製作された触媒担体１０を有してお
り、この触媒担体１０は図２に示すように金属製の平板
１０ａと波板１０ｂとを重ねた状態で連続的に巻回する
か、あるいは平板１０ａと波板１０ｂとを交互に積層し
て、排気ガス流れ方向に平行な多数の独立した通路１０
ｃを有するハニカム構造に形成されている。Next, the specific structure of the device of the present invention will be described in detail with reference to FIGS. The first catalyst member 6 has heat resistance,
It has a catalyst carrier 10 made of a metal having excellent corrosion resistance, for example, a ferritic heat-resistant stainless steel (SUS430), and this catalyst carrier 10 has a metal flat plate 10a and a corrugated plate 10b stacked as shown in FIG. A plurality of independent passages 10 parallel to the exhaust gas flow direction are formed by continuously winding in a state or alternately stacking flat plates 10a and corrugated plates 10b.
It is formed in a honeycomb structure having c.
【００２１】ここで、上記平板１０ａと波板１０ｂの厚
さは５０μｍ程度が好ましく、また波板１０ｂのピッチ
は２．５ｍｍ程度が好ましい。そして、上記平板１０ａ
と波板１０ｂの当接部分や排気ガス流れ方向の両端部は
部分的にろう付けやレーザ溶接等の接合手段で一体に接
合されて、触媒担体１０全体としては略円柱状の形状に
形成されている。このように構成された金属製の触媒担
体１０を、γ−アルミナを溶かした溶液に浸して、担体
表面に厚さ０．１ｍｍ程度のγ−アルミナ層を付着し、
その後、白金、ロジウム等の貴金属を溶かした溶液に浸
して、前記γ−アルミナ層の表面に白金、ロジウム等の
貴金属を散りばめ、もって金属製の触媒担体１０の表面
全体に、白金、ロジウム等の貴金属触媒が担持されてい
る。The thickness of the flat plate 10a and the corrugated plate 10b is preferably about 50 μm, and the pitch of the corrugated plate 10b is preferably about 2.5 mm. Then, the flat plate 10a
The abutting portion of the corrugated plate 10b and both end portions in the exhaust gas flow direction are partially joined integrally by joining means such as brazing or laser welding, so that the catalyst carrier 10 as a whole is formed into a substantially columnar shape. ing. The metal catalyst carrier 10 thus configured is immersed in a solution of γ-alumina, and a γ-alumina layer having a thickness of about 0.1 mm is attached to the surface of the carrier,
Then, it is dipped in a solution in which a noble metal such as platinum or rhodium is dissolved, and the noble metal such as platinum or rhodium is scattered on the surface of the γ-alumina layer, so that the entire surface of the metallic catalyst carrier 10 is covered with platinum, rhodium or the like. A noble metal catalyst is supported.
【００２２】偏流部材８は触媒担体１０と同一の金属
（ＳＵＳ４３０）で形成されており、円錐状部８ａとこ
の円錐状部８ａを支持する支持軸８ｂとをプレス加工、
溶接等の方法で一体構造に形成したものである。円錐状
部８ａは排気ガス流の中心部に、円錐形状の先端が上流
側に向くように設置され、そして円錐状部８ａの下流側
に支持軸８ｂを配置して、この支持軸８ｂの下流側部分
を触媒担体１０の中心部に挿入して、触媒担体１０に偏
流部材８はろう付けやレーザ溶接等の接合手段で一体に
接合されている。ここで、第１の触媒部材６と偏流部材
８との一体化方法としては、予め金属製触媒担体１０を
製作しておき、その後この金属製触媒担体１０の中心部
に偏流部材８の支持軸８ｂを挿入、接合してもよいが、
ハニカム構造の触媒担体１０を製作するときに、支持軸
８ｂの周りに、ハニカム構造の平板１０ａ、波板１０ｂ
を直接巻回あるいは積層するようにしてもよい。The drift member 8 is made of the same metal (SUS430) as the catalyst carrier 10, and presses the conical portion 8a and the support shaft 8b supporting the conical portion 8a.
It is formed as an integral structure by a method such as welding. The conical portion 8a is installed at the center of the exhaust gas flow so that the tip of the conical shape faces the upstream side, and the support shaft 8b is arranged on the downstream side of the conical portion 8a. The side portion is inserted into the central portion of the catalyst carrier 10, and the drift member 8 is integrally joined to the catalyst carrier 10 by joining means such as brazing or laser welding. Here, as a method of integrating the first catalyst member 6 and the drift member 8, the metal catalyst carrier 10 is manufactured in advance, and then the support shaft of the drift member 8 is provided at the center of the metal catalyst carrier 10. 8b may be inserted and joined,
When manufacturing the catalyst carrier 10 having the honeycomb structure, the flat plate 10a having the honeycomb structure and the corrugated plate 10b are formed around the support shaft 8b.
May be directly wound or laminated.
【００２３】上記偏流部材８によって排気ガスの流れを
スムーズに第１の触媒部材６の外周側に偏流、拡散する
ためには、円錐状部８ａの頂部角度θは５０〜６０°程
度が好ましく、また円錐状部８ａの下流端と触媒担体１
０との距離Ｌは触媒担体１０の高さＨ１と略同等に設定
することが好ましい。そして、円錐状部８ａの円錐面を
延長した線８ｃと、この線８ｃに対して所定角度α（１
５〜３０°程度）をなす線８ｄがそれぞれ触媒担体１０
の上流側端面とぶつかる点８ｅ、８ｆで囲まれるリング
状領域Ａ（図２参照）に排気ガスが主に偏流するように
なっている。この領域Ａに対応する触媒担体１０の部位
に、ハニカム構造の通路１０ｃ相互間で排気ガス流が通
過できるようにする穴１０ｄが平板１０ａに開けられて
いる。この穴１０ｄに隣接して、この穴１０ｄを覆うよ
うにドーム状のルーバ１０ｅが平板１０ａに一体形成さ
れており、このドーム状のルーバ１０ｅによって穴１０
ｄを通過する気流を案内して、穴１０ｄを気流が通過し
やすくしてある。これらの穴１０ｄとルーバ１０ｅはプ
レス加工により平板１０ａに形成されている。本例で
は、上記穴１０ｄとルーバ１０ｅとによりハニカム構造
における排気ガスの連通手段を構成している。In order to allow the flow of the exhaust gas to flow and diffuse smoothly to the outer peripheral side of the first catalyst member 6 by the above-mentioned drift member 8, the apex angle θ of the conical portion 8a is preferably about 50 to 60 °, Further, the downstream end of the conical portion 8a and the catalyst carrier 1
The distance L from 0 is preferably set to be substantially equal to the height H1 of the catalyst carrier 10. Then, a line 8c obtained by extending the conical surface of the conical portion 8a and a predetermined angle α (1
Lines 8d that form 5 to 30 degrees) are the catalyst carriers 10 respectively.
The exhaust gas mainly drifts in a ring-shaped region A (see FIG. 2) surrounded by points 8e and 8f that collide with the upstream end face of the. In the portion of the catalyst carrier 10 corresponding to this region A, a hole 10d is formed in the flat plate 10a so that the exhaust gas flow can pass between the passages 10c of the honeycomb structure. A dome-shaped louver 10e is integrally formed on the flat plate 10a so as to cover the hole 10d adjacent to the hole 10d.
The airflow passing through d is guided so that the airflow easily passes through the hole 10d. The hole 10d and the louver 10e are formed on the flat plate 10a by press working. In this example, the hole 10d and the louver 10e constitute exhaust gas communication means in the honeycomb structure.
【００２４】また、第１の触媒部材６はその触媒活性化
を速めるために、昇温速度が早くなるように容量（ひい
ては熱容量）が第２の触媒部材７より小さくしてあり、
具体的には直径Ｒが１００ｍｍの円柱体の場合、その高
さＨ１は２０〜４０ｍｍ程度に設定する。一方、第２の
触媒部材７はその高さＨ２が４５〜９０ｍｍ程度に設定
して、その容量を第１の触媒部材６より大きくしてあ
る。本発明者の実験、検討によれば、第１の触媒部材６
の容量は第２の触媒部材７の容量の５０％以下にするこ
とが触媒活性化促進による浄化性能向上に有効であるこ
とが分かった。Further, in order to accelerate the catalyst activation, the first catalyst member 6 has a smaller capacity (and hence a heat capacity) than that of the second catalyst member 7 so that the temperature rising rate becomes faster,
Specifically, in the case of a cylindrical body having a diameter R of 100 mm, its height H1 is set to about 20 to 40 mm. On the other hand, the height H2 of the second catalyst member 7 is set to about 45 to 90 mm, and the capacity thereof is made larger than that of the first catalyst member 6. According to experiments and studies by the present inventor, the first catalyst member 6
It was found that setting the capacity of 50% or less of the capacity of the second catalyst member 7 to be effective in improving the purification performance by promoting catalyst activation.
【００２５】なお、第２の触媒部材７は、容量が大きい
点及び穴１０ｄ、ドーム状のルーバ１０ｅからなる連通
手段を備えていない点を除いては第１の触媒部材６と基
本的に同一構成であり、従って第２の触媒部材７は第１
の触媒部材６と同一の材質、製法で製作されたハニカム
構造の金属製触媒担体７ａと、この触媒担体７ａに担持
された触媒とからなる。The second catalyst member 7 is basically the same as the first catalyst member 6 except that the second catalyst member 7 has a large capacity and is not provided with a communicating means composed of a hole 10d and a dome-shaped louver 10e. And therefore the second catalytic member 7 is
The catalyst member 6 is made of the same material and has the same manufacturing method as that of the metal catalyst carrier 7a having a honeycomb structure, and the catalyst carried on the catalyst carrier 7a.
【００２６】第１、第２の触媒部材６、７はともに外筒
９の内周面に嵌合され、外筒９にろう付けやレーザ溶接
等の接合手段で一体に接合されている。ここで、外筒９
は前述の金属製触媒担体１０、７ａと同じフェライト系
耐熱ステンレス（ＳＵＳ４３０）で製作されており、そ
の厚さは１．５ｍｍである。次に、上記構成において本
実施例の作動を説明する。図４において、内燃機関１が
始動されると、その排気ガスは排気マニホルド２、排気
管３を経て本発明の触媒装置５内に流入する。そして、
本発明装置５においては、排気ガスは最初に第１の触媒
部材６に流入し、その後第２の触媒部材７に流入して、
この両触媒部材６、７で浄化されることになる。Both the first and second catalyst members 6 and 7 are fitted to the inner peripheral surface of the outer cylinder 9 and integrally joined to the outer cylinder 9 by a joining means such as brazing or laser welding. Here, the outer cylinder 9
Is made of the same ferritic heat resistant stainless steel (SUS430) as the metal catalyst carriers 10 and 7a described above, and its thickness is 1.5 mm. Next, the operation of this embodiment with the above configuration will be described. In FIG. 4, when the internal combustion engine 1 is started, its exhaust gas flows into the catalyst device 5 of the present invention through the exhaust manifold 2 and the exhaust pipe 3. And
In the device 5 of the present invention, the exhaust gas first flows into the first catalyst member 6 and then into the second catalyst member 7,
It is cleaned by both of the catalyst members 6 and 7.
【００２７】その際、第１の触媒部材６の上流側に位置
する偏流部材８の円錐状部８ａによって排気通路中心部
の排気ガスＧが外周側へ偏流され（図５参照）、この円
錐状部８ａの外面に沿って排気ガスＧは主に第１の触媒
部材６のリング状の領域Ａに流入し、この領域Ａにおい
てハニカム構造の連通手段をなす穴１０ｄ、ドーム状ル
ーバ１０ｅによって通路１０ｃ相互で流通し、拡散す
る。At this time, the exhaust gas G in the central portion of the exhaust passage is deflected toward the outer peripheral side by the conical portion 8a of the flow deflecting member 8 located upstream of the first catalyst member 6 (see FIG. 5). The exhaust gas G mainly flows into the ring-shaped region A of the first catalyst member 6 along the outer surface of the portion 8a, and in this region A, the holes 10d and the dome-shaped louvers 10e which form the communicating means of the honeycomb structure are used to form the passages 10c. Circulate and spread with each other.
【００２８】ここで、ルーバ１０ｅの方向は、図１、５
に示すように領域Ａの外周側と内周側とで反転させ、領
域Ａの外周側ではルーバ１０ｅにより排気ガスＧをさら
に外周側へ案内し、領域Ａの内周側ではルーバ１０ｅに
より排気ガスＧを内周側へ案内する。なお、図６はルー
バ１０ｅによる排気ガスＧの案内作用を拡大して示す。
このようにして、排気ガスＧはハニカム構造の第１の触
媒部材６全体に良好に拡散するので、排気ガスＧと触媒
との接触面積が増大し、この結果、熱容量が小さく、昇
温しやすい第１の触媒部材６を、その外周側まで拡散し
た排気ガスＧからの伝熱、及び排気ガスＧと触媒との反
応熱により、短時間のうちに速やかに触媒活性化温度ま
で上昇させることができる。従って、一旦、金属製触媒
担体１０が冷却した後に、内燃機関を再始動時した場合
でも、第１の触媒部材６の活性化を促進して、排気ガス
の浄化性能を効果的に向上できる。The direction of the louver 10e is shown in FIGS.
As shown in FIG. 3, the outer peripheral side and the inner peripheral side of the region A are reversed, the louver 10e guides the exhaust gas G further to the outer peripheral side of the region A, and the inner peripheral side of the region A uses the louver 10e to exhaust gas. Guide G to the inner circumference. Note that FIG. 6 is an enlarged view showing the guide function of the exhaust gas G by the louver 10e.
In this way, the exhaust gas G spreads well over the entire first catalyst member 6 having the honeycomb structure, so that the contact area between the exhaust gas G and the catalyst increases, and as a result, the heat capacity is small and the temperature is easily raised. The first catalyst member 6 can be quickly raised to the catalyst activation temperature in a short time by the heat transfer from the exhaust gas G diffused to the outer peripheral side thereof and the reaction heat between the exhaust gas G and the catalyst. it can. Therefore, even if the internal combustion engine is restarted after the metal catalyst carrier 10 has once cooled, the activation of the first catalyst member 6 can be promoted and the exhaust gas purification performance can be effectively improved.
【００２９】そして、始動直後の暖機運転の間に、容量
の大きい第２の触媒部材７の温度も上昇して触媒の活性
化温度まで上昇するので、暖機運転終了後は第１、第２
の両触媒部材６、７の浄化作用の組合せにより排気ガス
の浄化を行う。図７、８は本発明の第２実施例を示すも
ので、金属製偏流部材８として、先細り円筒状部材を用
いたものである。すなわち、偏流部材８の最上流側部分
に円筒の径を絞った小径部８ｇを形成し、この小径部８
ｇの下流側に徐々に径が拡大する径拡大部８ｈを形成
し、この径拡大部８ｈの下流側に径が一定のままに設定
された円筒部８ｉを形成し、これらの部分８ｇ、８ｈ、
８ｉを連続的に一体形成することにより先細り円筒状の
偏流部材８を形成している。この金属製偏流部材８の最
下流端を第１の触媒部材６の上流側端面にろう付け、溶
接等の接合手段で一体に接合してある。他の点はすべて
第１実施例と同じである。During the warm-up operation immediately after the start-up, the temperature of the second catalyst member 7 having a large capacity also rises to the activation temperature of the catalyst. Two
The exhaust gas is purified by the combination of the purification actions of both catalyst members 6 and 7. 7 and 8 show a second embodiment of the present invention, in which a tapered cylindrical member is used as the metal drift member 8. That is, a small diameter portion 8g having a reduced diameter of the cylinder is formed on the most upstream side portion of the drift member 8, and the small diameter portion 8g is formed.
A diameter enlarging portion 8h whose diameter is gradually enlarged is formed on the downstream side of g, and a cylindrical portion 8i whose diameter is set to be constant is formed on the downstream side of the diameter enlarging portion 8h, and these portions 8g, 8h are formed. ,
8i is continuously and integrally formed to form the tapered cylindrical drift member 8. The most downstream end of the metallic drift member 8 is brazed to the upstream end surface of the first catalyst member 6 and integrally joined by joining means such as welding. All other points are the same as in the first embodiment.
【００３０】この第２実施例では、上記小径部８ｇを排
気ガス流の中心部に位置させて、先細り円筒形状に沿っ
て、排気ガスを矢印Ｇ１のごとく中心部から外周側に偏
流させた後、第１の触媒部材６へ流入させるとともに、
中心部の少量の排気ガスは矢印Ｇ２のごとく小径部８ｇ
の開口８ｊを通って、偏流部材８内を通過して第１の触
媒部材６へ流入する。In the second embodiment, the small diameter portion 8g is positioned at the center of the exhaust gas flow, and the exhaust gas is diverted from the center to the outer peripheral side as indicated by the arrow G1 along the tapered cylindrical shape. , While flowing into the first catalyst member 6,
The small amount of exhaust gas in the center is 8g as shown by arrow G2.
Through the opening 8j, passes through the drift member 8 and flows into the first catalyst member 6.
【００３１】外周側に偏流した排気ガスＧ２が第１の触
媒部材６の触媒担体１０に設けられた穴１０ｄとルーバ
１０ｅとにより、第１の触媒部材６内で拡散するのは第
１実施例と同じである。なお、本発明は上述した第１、
第２実施例以外にも種々の形態で実施し得るものであ
り、例えば前記第１の触媒部材６及び第２の触媒部材７
をセラミック製とすることもできる。この場合は、コー
ジェライト（２ＭｇＯ・２Ａｌ2 ０3 ・５Ｓｉ０2 ）等
のセラミックからなる触媒担体の表面にγ−アルミナ層
を付着させ、このγ−アルミナ層の表面に白金、ロジウ
ム等の貴金属触媒を散りばめ、担持さればよい。このよ
うなセラミック製の第１、第２の触媒部材６、７を用い
る場合にも、偏流部材８を組み合わせて、第１、第２実
施例と同様の作用効果を発揮できる。Exhaust gas G2, which is unevenly distributed to the outer peripheral side, diffuses in the first catalyst member 6 by the holes 10d and the louver 10e provided in the catalyst carrier 10 of the first catalyst member 6 in the first embodiment. Is the same as. In addition, the present invention is the above-mentioned first,
The present invention can be implemented in various forms other than the second embodiment, for example, the first catalyst member 6 and the second catalyst member 7 described above.
Can also be made of ceramic. In this case, a γ-alumina layer is attached to the surface of a catalyst carrier made of a ceramic such as cordierite (2MgO · 2Al 2 0 3 5SiO 2 ), and a precious metal catalyst such as platinum or rhodium is attached to the surface of the γ-alumina layer. It may be supported by being dispersed. Even when such ceramic first and second catalyst members 6 and 7 are used, the same effect as in the first and second embodiments can be exhibited by combining the drift member 8.
【００３２】また、第１実施例において、偏流部材８の
円錐状部８ａを球状等の他の形状に変形することもでき
る。また、偏流部材８を第１の触媒部材６に固定せず
に、偏流部材８を直接外筒９に固定することもできる。Further, in the first embodiment, the conical portion 8a of the drift member 8 may be deformed into another shape such as a spherical shape. Further, the drift member 8 may be directly fixed to the outer cylinder 9 without fixing the drift member 8 to the first catalyst member 6.
【図１】本発明の第１実施例における触媒装置の断面図
である。FIG. 1 is a sectional view of a catalyst device according to a first embodiment of the present invention.
【図２】図１のＸ矢視図である。FIG. 2 is a view on arrow X in FIG.
【図３】図２のＢ部の拡大斜視図である。FIG. 3 is an enlarged perspective view of a B part in FIG.
【図４】本発明の第１実施例における触媒装置を配置し
た内燃機関の排気系統図である。FIG. 4 is an exhaust system diagram of an internal combustion engine in which the catalyst device according to the first embodiment of the present invention is arranged.
【図５】図１と同一部分の断面図で、排気ガスの流れを
示す作動説明用の図である。5 is a cross-sectional view of the same portion as FIG. 1 and is a diagram for explaining the operation showing the flow of exhaust gas.
【図６】図３と同一部分の拡大斜視図で、排気ガスの流
れを示す作動説明用の図である。FIG. 6 is an enlarged perspective view of the same portion as FIG. 3 and is a diagram for explaining the operation showing the flow of exhaust gas.
【図７】本発明の第２実施例における触媒装置の断面図
である。FIG. 7 is a sectional view of a catalyst device according to a second embodiment of the present invention.
【図８】図７のＹ矢視図である。FIG. 8 is a view on arrow Y of FIG.
【図９】従来の触媒装置の断面図である。FIG. 9 is a cross-sectional view of a conventional catalyst device.
５ 触媒装置 ６ 第１の触媒部材 ７ 第２の触媒部材 ８ 偏流部材 ８ａ 円錐状部 ８ｂ 支持軸 ８ｇ 小径部 ９ 外筒 １０ 触媒担体 １０ａ平板 １０ｂ波板 １０ｃ通路 １０ｄ穴 １０ｅルーバ 5 catalyst device 6 first catalyst member 7 second catalyst member 8 drift member 8a conical portion 8b support shaft 8g small diameter portion 9 outer cylinder 10 catalyst carrier 10a flat plate 10b corrugated plate 10c passage 10d hole 10e louver
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｊ 35/04 ３２１ Ａ Ｚ Ｆ０１Ｎ 3/20 ＺＡＢ Ｅ (72)発明者 渡辺 聖彦 愛知県西尾市下羽角町岩谷14番地 株式会 社日本自動車部品総合研究所内 (72)発明者 岡部 伸一 愛知県西尾市下羽角町岩谷14番地 株式会 社日本自動車部品総合研究所内 (72)発明者 伊藤 啓司 愛知県刈谷市昭和町１丁目１番地 日本電 装株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication location B01J 35/04 321 AZ F01N 3/20 ZAB E (72) Inventor Kiyohiko Watanabe Shimohakaku, Nishio-shi, Aichi prefecture 14 Iwatani Machi, Japan Automotive Parts Research Institute, Inc. (72) Inventor Shinichi Okabe 14 Iwatani, Shimohakakucho, Nishio-shi, Aichi Prefecture Japan Automotive Parts Research Institute, Inc. (72) Inventor Keiji Ito Showa Kariya, Aichi Prefecture 1-chome, Machi Nihon Denso Co., Ltd.
Claims (10)
の小さい第１の触媒手段と、 この第１の触媒手段の下流側に設置され、この第１の触
媒手段より容量の大きい第２の触媒手段と、 前記第１の触媒手段の上流側に設置され、前記第１の触
媒手段の中心部に流入しようとする排気ガスの流れを中
心部から外周側に偏流させる偏流手段と、 を備えることを特徴とする排気ガス浄化用触媒装置。1. A first catalyst means which is installed upstream of the exhaust gas passage and has a small capacity, and a second catalyst means which is installed downstream of the first catalyst means and which has a larger capacity than the first catalyst means. And a biasing means that is installed upstream of the first catalyst means and biases the flow of exhaust gas that flows into the central portion of the first catalyst means from the central portion to the outer peripheral side. An exhaust gas purifying catalyst device comprising.
は、金属製の触媒担体とこの触媒担体に担持された触媒
からなることを特徴とする請求項１記載の排気ガス浄化
用触媒装置。2. The exhaust gas purifying catalyst according to claim 1, wherein the first catalyst means and the second catalyst means are composed of a metal catalyst carrier and a catalyst supported on the catalyst carrier. apparatus.
は、セラミック製の触媒担体とこの触媒担体に担持され
た触媒からなることを特徴とする請求項１記載の排気ガ
ス浄化用触媒装置。3. The exhaust gas purifying catalyst according to claim 1, wherein the first catalyst means and the second catalyst means are composed of a ceramic catalyst carrier and a catalyst supported on the catalyst carrier. apparatus.
一体に固定されていることを特徴とする請求項１ないし
３のいずれか１つに記載の排気ガス浄化用触媒装置。4. The exhaust gas purifying catalyst device according to claim 1, wherein the non-uniform flow means is integrally fixed to the first catalyst means.
ともに金属製であり、この両手段が一体に固定されてい
ることを特徴とする請求項１記載の排気ガス浄化用触媒
装置。5. The exhaust gas purifying catalyst device according to claim 1, wherein both of the non-uniform flow means and the first catalyst means are made of metal, and both means are integrally fixed.
向に平行な多数の独立した通路を有するハニカム構造に
形成されており、 前記第１の触媒手段のうち、前記偏流手段によって偏流
された排気ガスの流れを受ける部位に、前記ハニカム構
造の通路相互間で気流が通過できる連通手段を備えたこ
とを特徴とする請求項１ないし５のいずれか１つに記載
の排気ガス浄化用触媒装置。6. The first catalyst means is formed in a honeycomb structure having a large number of independent passages parallel to the exhaust gas flow direction, and the first catalyst means is biased by the drift means. The exhaust gas purifying catalyst according to any one of claims 1 to 5, characterized in that a portion for receiving the flow of the exhaust gas is provided with a communicating means capable of passing an air flow between the passages of the honeycomb structure. apparatus.
路の壁部に開けられた穴と、この穴を通過する気流を案
内するルーバとから構成されていることを特徴とする請
求項６記載の排気ガス浄化用触媒装置。7. The communication means comprises a hole formed in a wall portion of the honeycomb structure passage and a louver for guiding an air flow passing through the hole. Exhaust gas purification catalyst device.
上流側において排気ガス流の中心部に、円錐形状の先端
が上流側に向くように設置された円錐状部材からなるこ
とを特徴とする請求項１ないし７のいずれか１つに記載
の排気ガス浄化用触媒装置。8. The non-uniform flow means comprises a conical member installed at the center of the exhaust gas flow upstream of the first catalyst means so that the tip of the conical shape faces the upstream side. The exhaust gas purifying catalyst device according to any one of claims 1 to 7.
上流側において排気ガス流の中心部に位置する小径部が
上流側に向くように設置された先細り円筒状部材からな
ることを特徴とする請求項１ないし７のいずれか１つに
記載の排気ガス浄化用触媒装置。9. The biasing means comprises a tapered cylindrical member installed such that a small diameter portion located at the center of the exhaust gas flow on the upstream side of the first catalyst means faces the upstream side. The exhaust gas purifying catalyst device according to any one of claims 1 to 7.
２の触媒手段の容量の５０％以下であることを特徴とす
る請求項１ないし９のいずれか１つに記載の排気ガス浄
化用触媒装置。10. The exhaust gas purifying according to claim 1, wherein the capacity of the first catalyst means is 50% or less of the capacity of the second catalyst means. Catalyst device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6075947A JPH07279652A (en) | 1994-04-14 | 1994-04-14 | Catalyst device for purifying exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6075947A JPH07279652A (en) | 1994-04-14 | 1994-04-14 | Catalyst device for purifying exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07279652A true JPH07279652A (en) | 1995-10-27 |
Family
ID=13590936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6075947A Pending JPH07279652A (en) | 1994-04-14 | 1994-04-14 | Catalyst device for purifying exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07279652A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000070206A1 (en) * | 1999-05-14 | 2000-11-23 | Helmut Swars | Honeycomb element |
| JP2005342638A (en) * | 2004-06-04 | 2005-12-15 | Mitsubishi Motors Corp | Carrier for exhaust gas purifying catalyst |
| JP2007501123A (en) * | 2003-05-30 | 2007-01-25 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Metal foil with microstructure |
| WO2009038335A3 (en) * | 2007-09-18 | 2009-05-07 | Amo Co Ltd | Monolith, catalyst convertor for purifying exhaust gas using the same and method for manufacturing the catalyst |
| JP2013209904A (en) * | 2012-03-30 | 2013-10-10 | Daihatsu Motor Co Ltd | Exhaust emission control device |
| KR101325778B1 (en) * | 2012-03-20 | 2013-11-07 | 주식회사 성일오일테크 | A Smoke Reduction System of the Exhaust Gas |
| US8814969B2 (en) | 2011-03-18 | 2014-08-26 | Komatsu Ltd. | Exhaust gas purification device |
| DE102014105770A1 (en) * | 2014-04-24 | 2015-11-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for influencing a fluid flow |
| CN109126450A (en) * | 2018-10-30 | 2019-01-04 | 晋江知保企业管理咨询有限公司 | Industrial carbon monoxide emission-control equipment |
| WO2023112964A1 (en) * | 2021-12-16 | 2023-06-22 | 日鉄ケミカル＆マテリアル株式会社 | Catalyst-carrying substrate used in purification of exhaust gas |
-
1994
- 1994-04-14 JP JP6075947A patent/JPH07279652A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000070206A1 (en) * | 1999-05-14 | 2000-11-23 | Helmut Swars | Honeycomb element |
| JP2007501123A (en) * | 2003-05-30 | 2007-01-25 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Metal foil with microstructure |
| JP4717819B2 (en) * | 2003-05-30 | 2011-07-06 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Metal foil with microstructure |
| JP2005342638A (en) * | 2004-06-04 | 2005-12-15 | Mitsubishi Motors Corp | Carrier for exhaust gas purifying catalyst |
| WO2009038335A3 (en) * | 2007-09-18 | 2009-05-07 | Amo Co Ltd | Monolith, catalyst convertor for purifying exhaust gas using the same and method for manufacturing the catalyst |
| EP2190569A2 (en) * | 2007-09-18 | 2010-06-02 | Amo Co., Ltd. | Monolith, catalyst convertor for purifying exhaust gas using the same and method for manufacturing the catalyst |
| EP2190569A4 (en) * | 2007-09-18 | 2013-03-13 | Amo Co Ltd | Monolith, catalyst convertor for purifying exhaust gas using the same and method for manufacturing the catalyst |
| US8409516B2 (en) | 2007-09-18 | 2013-04-02 | Amo Co., Ltd. | Monolith, catalyst convertor for purifying exhaust gas using the same and method for manufacturing the catalyst convertor |
| US8814969B2 (en) | 2011-03-18 | 2014-08-26 | Komatsu Ltd. | Exhaust gas purification device |
| KR101325778B1 (en) * | 2012-03-20 | 2013-11-07 | 주식회사 성일오일테크 | A Smoke Reduction System of the Exhaust Gas |
| JP2013209904A (en) * | 2012-03-30 | 2013-10-10 | Daihatsu Motor Co Ltd | Exhaust emission control device |
| DE102014105770A1 (en) * | 2014-04-24 | 2015-11-12 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Method for influencing a fluid flow |
| CN106255812A (en) * | 2014-04-24 | 2016-12-21 | 大陆汽车有限公司 | For the method affecting fluid flowing |
| US10161280B2 (en) | 2014-04-24 | 2018-12-25 | Continental Automotive Gmbh | Method for influencing a fluid flow |
| CN109126450A (en) * | 2018-10-30 | 2019-01-04 | 晋江知保企业管理咨询有限公司 | Industrial carbon monoxide emission-control equipment |
| WO2023112964A1 (en) * | 2021-12-16 | 2023-06-22 | 日鉄ケミカル＆マテリアル株式会社 | Catalyst-carrying substrate used in purification of exhaust gas |
| JP7335468B1 (en) * | 2021-12-16 | 2023-08-29 | 日鉄ケミカル＆マテリアル株式会社 | Catalyst-supporting base material used for purifying exhaust gas |
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