JP2007224825A - Exhaust gas treatment device for internal combustion engine - Google Patents
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Abstract
Description
本発明は、内燃機関から排出された排ガスの消音処理及び浄化処理を行う内燃機関の排ガス処理装置に関し、特に、排気抵抗を低減するとともに、断熱性を増加するための内燃機関の排ガス処理装置に関する。 The present invention relates to an exhaust gas treatment apparatus for an internal combustion engine that performs a silencing process and a purification process for exhaust gas discharged from the internal combustion engine, and more particularly to an exhaust gas treatment apparatus for an internal combustion engine for reducing exhaust resistance and increasing heat insulation. .
従来、内燃機関の排ガス処理装置として、内燃機関から排出された排ガスを消音するとともに、排ガス中に含まれる窒素酸化物（ＮＯｘ）又は粒子状物質（ＰＭ）を低減して排ガス浄化処理を行う装置があり、例えば、触媒マフラー、触媒コンバータ、排気フィルタ装置等がある（特許文献１〜３参照）。 2. Description of the Related Art Conventionally, as an exhaust gas treatment device for an internal combustion engine, an apparatus that silences exhaust gas discharged from the internal combustion engine and performs exhaust gas purification treatment by reducing nitrogen oxide (NOx) or particulate matter (PM) contained in the exhaust gas For example, there are a catalyst muffler, a catalytic converter, an exhaust filter device and the like (see Patent Documents 1 to 3).
このような排ガス処理装置においては、消音効果を向上させるために、装置内に消音室を設け、排ガス導入管若しくは排ガス導出管に孔（以下「パンチ孔」という。）を設けている。また、排ガス浄化効果を向上させるために、装置本体の外部に断熱カバーを設けたり、或いは装置本体の内部にプレートを設けて断熱性の二重構造にしている。 In such an exhaust gas treatment apparatus, in order to improve the silencing effect, a silencer chamber is provided in the apparatus, and a hole (hereinafter referred to as “punch hole”) is provided in the exhaust gas introduction pipe or the exhaust gas outlet pipe. In order to improve the exhaust gas purification effect, a heat insulating cover is provided outside the apparatus main body, or a plate is provided inside the apparatus main body to form a heat insulating double structure.
より具体的には、図３に示すように、従来の排ガス処理装置３０は、内部に排ガス流路が形成されたハウジング１と、ハウジング１内に設けられ排ガス浄化材（触媒等）を担持する排ガス浄化部２と、ハウジング１内の領域のうち排ガス浄化部２より上流側の領域を上流側から順に上流側消音室３と上流側空間部４とに区画する上流側仕切板５と、ハウジング１内に上流側端部１ａから挿入されて上流側消音室３を貫通するとともに、下流側管口６ｂが上流側仕切板５に接続された排ガス導入管６と、ハウジング１内の領域のうち排ガス浄化部２より下流側の領域を上流側から順に下流側空間部７と下流側消音室８とに区画する下流側仕切板９と、ハウジング１内に下流側端部１ｂから挿入されて下流側消音室８を貫通するとともに、上流側管口１１ｂが下流側仕切板９に接続された排ガス導出管１１と、を備えている。なお、上流側仕切板５には、上流側消音室３と上流側空間部４とを連通するパンチ孔５ａが形成され、下流側仕切板９には、下流側空間部７と下流側消音室８とを連通するパンチ孔９ａが形成されている。 More specifically, as shown in FIG. 3, the conventional exhaust gas treatment device 30 carries a housing 1 in which an exhaust gas flow path is formed, and an exhaust gas purification material (a catalyst or the like) provided in the housing 1. An exhaust gas purifying section 2, an upstream partition plate 5 that partitions an upstream area of the exhaust gas purifying section 2 into an upstream silencing chamber 3 and an upstream space section 4 from the upstream side, and a housing Exhaust gas introduction pipe 6 inserted into upstream 1 from upstream end 1a and penetrating upstream silencing chamber 3 and having downstream pipe port 6b connected to upstream partition plate 5; A downstream partition plate 9 that divides a region downstream from the exhaust gas purification unit 2 into a downstream space 7 and a downstream silencing chamber 8 in order from the upstream side, and is inserted into the housing 1 from the downstream end 1b and downstream While passing through the side silencing chamber 8, upstream Mouth 11b is provided with an exhaust gas discharge pipe 11 connected to the downstream side partition plate 9, the. The upstream partition plate 5 is formed with a punch hole 5a that communicates the upstream silencer chamber 3 and the upstream space portion 4, and the downstream partition plate 9 has a downstream space portion 7 and a downstream silencer chamber. A punch hole 9 a communicating with 8 is formed.
そして、上流側仕切板５は、排ガス導入管６の下流側管口６ｂを塞いでおり、且つ該排ガス導入管６には、上流側消音室３を貫通する領域にパンチ孔６ａが形成されている。また、下流側仕切板９は、排ガス導出管１１の上流側管口１１ｂを塞いでおり、且つ該排ガス導出管１１には、下流側消音室８を貫通する領域にパンチ孔１１ａが形成されている。 The upstream partition plate 5 closes the downstream port 6 b of the exhaust gas introduction pipe 6, and the exhaust gas introduction pipe 6 is formed with a punch hole 6 a in a region that penetrates the upstream silencing chamber 3. Yes. Further, the downstream partition plate 9 closes the upstream port 11 b of the exhaust gas outlet pipe 11, and the exhaust gas outlet pipe 11 is formed with a punch hole 11 a in a region that penetrates the downstream silencing chamber 8. Yes.
さらに、装置本体の外部（同図に示すハウジング１の長手方向両端側）には断熱カバー１２ａ，１２ｂ，１２ｃを設置しており、また、装置本体の内部（上流側端部１ａの内壁面）にはプレート１３を設置して二重構造にしている。
しかしながら、従来の技術あっては、次の（１）〜（４）に掲げる問題があった。 However, the conventional techniques have the following problems (1) to (4).
すなわち、従来の排ガス処理装置は、前述したように排ガスが上流側仕切板５、下流側仕切板９、排ガス導入管６、及び排ガス導出管１１に形成されたパンチ孔５ａ，９ａ，６ａ，１１ａを通過するように構成されている。そのため、排ガスは各パンチ孔６ａ，９ａ，６ａ，１１ａから抵抗を受けることとなり、排気抵抗が増加する。そして、この排気抵抗を低減するには、パンチ孔面積を広げて開口率を向上させることとなるが、その場合、仕切板（上流側仕切板５，下流側仕切板９）や排ガス管（排ガス導入管６，排ガス導出管１１）の（１）強度低下を招いてしまう。 That is, in the conventional exhaust gas treatment apparatus, as described above, the exhaust gas is punch holes 5a, 9a, 6a, 11a formed in the upstream partition plate 5, the downstream partition plate 9, the exhaust gas introduction pipe 6, and the exhaust gas outlet pipe 11. Is configured to pass through. Therefore, exhaust gas receives resistance from each punch hole 6a, 9a, 6a, 11a, and exhaust resistance increases. In order to reduce the exhaust resistance, the punch hole area is increased to improve the aperture ratio. In this case, the partition plate (upstream partition plate 5, downstream partition plate 9) or exhaust pipe (exhaust gas) (1) Strength reduction of the introduction pipe 6 and the exhaust gas outlet pipe 11) is caused.
さらに、従来の排ガス処理装置のように、装置本体の外部に断熱カバー１２ａ，１２ｂ，１２ｃを設置した場合には、部品点数が増えることにより（２）コストＵＰを招くとともに、外部寸法が増えることにより（３）装置の大型化を招いてしまう。また、従来の排ガス処理装置のように、装置本体の内部にプレート１３を設置した場合にも、部品点数が増えることになって（２）コストＵＰを招き、さらに内部寸法が小さくなるので、（４）排気騒音の低減に活用できる消音容積の縮小を招いてしまう。 Further, when the heat insulating covers 12a, 12b, and 12c are installed outside the apparatus main body as in the conventional exhaust gas treatment apparatus, the number of parts increases, and (2) the cost increases and the external dimensions increase. (3) The size of the apparatus is increased. In addition, when the plate 13 is installed inside the apparatus main body as in the conventional exhaust gas treatment apparatus, the number of parts increases, and (2) the cost is increased and the internal dimensions are further reduced. 4) The sound deadening volume that can be used to reduce exhaust noise is reduced.
本発明は、上記の問題に鑑みてなされたものであり、その目的は、強度低下、コストＵＰ、及び装置の大型化を招くことなく、また、排気騒音の低減に活用できる消音容積を縮小させることもなく、排気抵抗を低減するとともに、断熱性を増加することができる排ガス処理装置を提供することにある。 The present invention has been made in view of the above-mentioned problems, and its object is to reduce the noise reduction volume that can be used for reducing exhaust noise without causing a reduction in strength, cost, and size of the apparatus. There is no need to provide an exhaust gas treatment apparatus that can reduce exhaust resistance and increase heat insulation.
上記課題を解決するために、本発明は、内燃機関から排出された排ガスの消音処理及び浄化処理を行う内燃機関の排ガス処理装置であって、内部に排ガス流路が形成されたハウジングと、前記排ガス流路中に設けられ排ガス浄化材を担持する排ガス浄化部と、前記ハウジング内の領域のうち前記排ガス浄化部より上流側の領域を上流側から順に上流側消音室と上流側空間部とに区画し、該上流側消音室と該上流側空間部とを連通する孔が形成された上流側仕切板と、前記ハウジングの上流側端部及び前記上流側消音室を貫通するとともに、下流側管口が前記上流側仕切板に接続された排ガス導入管と、前記ハウジング内の領域のうち前記排ガス浄化部より下流側の領域を上流側から順に下流側空間部と下流側消音室とに区画し、該下流側空間部と該下流側消音室とを連通する孔が形成された下流側仕切板と、前記ハウジングの下流側端部及び前記下流側消音室を貫通するとともに、上流側管口が前記下流側仕切板に接続された排ガス導出管と、を備え、
前記上流側仕切板には、前記排ガス導入管の前記下流側管口を前記上流側空間部に開放するための開放口が形成され、且つ前記排ガス導入管には、前記上流側消音室を貫通する領域に孔が形成されていないことを特徴とする。
In order to solve the above problems, the present invention provides an exhaust gas treatment apparatus for an internal combustion engine that performs a silencing process and a purification process for exhaust gas discharged from the internal combustion engine, the housing having an exhaust gas passage formed therein, An exhaust gas purification unit that is provided in the exhaust gas flow path and carries an exhaust gas purification material, and a region upstream of the exhaust gas purification unit among the regions in the housing is sequentially arranged from the upstream side to the upstream silencing chamber and the upstream space portion. An upstream partition plate that is partitioned and formed with a hole that communicates the upstream silencing chamber and the upstream space, and penetrates the upstream end portion of the housing and the upstream silencing chamber, and the downstream pipe An exhaust gas inlet pipe having an opening connected to the upstream partition plate, and a region downstream of the exhaust gas purification unit in the region in the housing is divided into a downstream space portion and a downstream silencing chamber in order from the upstream side. , The downstream space And a downstream partition plate formed with a hole communicating with the downstream silencer chamber, a downstream end portion of the housing and the downstream silencer chamber, and an upstream pipe port in the downstream partition plate A connected exhaust gas outlet pipe,
The upstream partition plate is formed with an opening for opening the downstream pipe port of the exhaust gas introduction pipe to the upstream space portion, and the exhaust gas introduction pipe penetrates the upstream silencing chamber. A hole is not formed in a region to be formed.
また、本発明は、内燃機関から排出された排ガスの消音処理及び浄化処理を行う内燃機関の排ガス処理装置であって、内部に排ガス流路が形成されたハウジングと、前記排ガス流路中に設けられ排ガス浄化材を担持する排ガス浄化部と、前記ハウジング内の領域のうち前記排ガス浄化部より上流側の領域を上流側から順に上流側消音室と上流側空間部とに区画し、該上流側消音室と該上流側空間部とを連通する孔が形成された上流側仕切板と、前記ハウジングの上流側端部及び前記上流側消音室を貫通するとともに、下流側管口が前記上流側仕切板に接続された排ガス導入管と、前記ハウジング内の領域のうち前記排ガス浄化部より下流側の領域を上流側から順に下流側空間部と下流側消音室とに区画し、該下流側空間部と該下流側消音室とを連通する孔が形成された下流側仕切板と、前記ハウジングの下流側端部及び前記下流側消音室を貫通するとともに、上流側管口が前記下流側仕切板に接続された排ガス導出管と、を備え、
前記下流側仕切板には、前記排ガス導出管の前記上流側管口を前記下流側空間部に開放するための開放口が形成され、且つ前記排ガス導出管には、前記下流側消音室を貫通する領域に孔が形成されていないことを特徴とする。
The present invention also relates to an exhaust gas treatment apparatus for an internal combustion engine that performs a silencing process and a purification process of exhaust gas discharged from the internal combustion engine, the housing having an exhaust gas flow path formed therein, and a housing provided in the exhaust gas flow path. An exhaust gas purifying unit that carries the exhaust gas purifying material, and an upstream region of the exhaust gas purifying unit in the region within the housing is divided into an upstream silencing chamber and an upstream space portion in order from the upstream side, the upstream side An upstream partition plate in which a hole communicating the silencer chamber and the upstream space portion is formed, an upstream end of the housing and the upstream silencer chamber, and a downstream pipe port serving as the upstream partition An exhaust gas introduction pipe connected to the plate, and a region downstream of the exhaust gas purification unit in the region in the housing is partitioned into a downstream space portion and a downstream silencing chamber in order from the upstream side, the downstream space portion And the downstream silencing chamber A downstream partition plate formed with a communicating hole, an exhaust gas outlet pipe penetrating the downstream end of the housing and the downstream silencing chamber, and an upstream pipe port connected to the downstream partition plate; With
The downstream partition plate is formed with an opening for opening the upstream pipe port of the exhaust gas outlet pipe to the downstream space portion, and the exhaust gas outlet pipe passes through the downstream silencing chamber. A hole is not formed in a region to be formed.
さらに、本発明は、内燃機関から排出された排ガスの消音処理及び浄化処理を行う内燃機関の排ガス処理装置であって、内部に排ガス流路が形成されたハウジングと、前記排ガス流路中に設けられ排ガス浄化材を担持する排ガス浄化部と、前記ハウジング内の領域のうち前記排ガス浄化部より上流側の領域を上流側から順に上流側消音室と上流側空間部とに区画し、該上流側消音室と該上流側空間部とを連通する孔が形成された上流側仕切板と、 前記ハウジングの上流側端部及び前記上流側消音室を貫通するとともに、下流側管口が前記上流側仕切板に接続された排ガス導入管と、前記ハウジング内の領域のうち前記排ガス浄化部より下流側の領域を上流側から順に下流側空間部と下流側消音室とに区画し、該下流側空間部と該下流側消音室とを連通する孔が形成された下流側仕切板と、前記ハウジングの下流側端部及び前記下流側消音室を貫通するとともに、上流側管口が前記下流側仕切板に接続された排ガス導出管と、を備え、
前記上流側仕切板には、前記排ガス導入管の前記下流側管口を前記上流側空間部に開放するための開放口が形成され、且つ前記排ガス導入管には、前記上流側消音室を貫通する領域に孔が形成されておらず、前記下流側仕切板には、前記排ガス導出管の前記上流側管口を前記下流側空間部に開放するための開放口が形成され、且つ前記排ガス導出管には、前記下流側消音室を貫通する領域に孔が形成されていないことが好ましい。
Furthermore, the present invention is an exhaust gas treatment apparatus for an internal combustion engine that performs a silencing process and a purification process for exhaust gas discharged from the internal combustion engine, the housing having an exhaust gas channel formed therein, and a housing provided in the exhaust gas channel. An exhaust gas purifying unit that carries the exhaust gas purifying material, and an upstream region of the exhaust gas purifying unit in the region within the housing is divided into an upstream silencing chamber and an upstream space portion in order from the upstream side, the upstream side An upstream partition plate in which a hole communicating the silencer chamber and the upstream space portion is formed; an upstream end portion of the housing and the upstream silencer chamber; and a downstream pipe port serving as the upstream partition An exhaust gas introduction pipe connected to the plate, and a region downstream of the exhaust gas purification unit in the region in the housing is partitioned into a downstream space portion and a downstream silencing chamber in order from the upstream side, the downstream space portion And the downstream silencer A downstream partition plate in which a hole communicating therewith is formed, and an exhaust gas outlet pipe penetrating the downstream end of the housing and the downstream silencing chamber, and having an upstream port connected to the downstream partition plate And comprising
The upstream partition plate is formed with an opening for opening the downstream pipe port of the exhaust gas introduction pipe to the upstream space portion, and the exhaust gas introduction pipe penetrates the upstream silencing chamber. No hole is formed in the region to be opened, and the downstream partition plate is formed with an opening for opening the upstream side pipe port of the exhaust gas outlet pipe to the downstream space part, and the exhaust gas outlet It is preferable that a hole is not formed in the pipe in a region penetrating the downstream side silencing chamber.
かかる構成とした場合には、排ガス導入管から導入された排ガスは、上流側消音室を経ることなく排ガス導入管内を直進して上流側空間部まで到達し、その下流側の排ガス浄化部で浄化される。排ガスは、排ガス導入管内を直進する際に上流側消音室で囲まれた断熱性の二重管構造により保温されるので、排ガス浄化部での浄化効率が向上する。なお、排ガスの騒音は、排ガスが上流側空間部を通過する際に、上流側仕切板に形成された孔により消音される。また、排ガス浄化部で浄化された排ガスは、下流側空間部を通過し、その大部分が下流側消音室を経ることなく排ガス導出管内に取り込まれ、排ガス導出管内を直進して導出される。排ガスは、排ガス導出管内を直進する際に、下流側消音室で囲まれた二重管構造により保温される。なお、排ガスの騒音は、排ガスが下流側空間部を通過する際に、その一部が下流側仕切板に形成された孔から下流側消音室内に流れ込んで消音され、或いは下流側仕切板の共鳴作用により消音される。 In such a configuration, the exhaust gas introduced from the exhaust gas introduction pipe goes straight through the exhaust gas introduction pipe without passing through the upstream side silencing chamber and reaches the upstream space, and is purified by the exhaust gas purification section on the downstream side thereof. Is done. Since the exhaust gas is kept warm by the heat insulating double pipe structure surrounded by the upstream silencing chamber when going straight in the exhaust gas introduction pipe, the purification efficiency in the exhaust gas purification section is improved. In addition, when the exhaust gas passes through the upstream space, the noise of the exhaust gas is silenced by the hole formed in the upstream partition plate. Further, the exhaust gas purified by the exhaust gas purification section passes through the downstream space portion, and most of the exhaust gas is taken into the exhaust gas outlet pipe without passing through the downstream silencing chamber, and is straightly guided through the exhaust gas outlet pipe. When the exhaust gas goes straight through the exhaust gas outlet pipe, the exhaust gas is kept warm by a double pipe structure surrounded by a downstream side silencing chamber. In addition, when the exhaust gas passes through the downstream space, a part of the exhaust gas flows into the downstream silencing chamber through a hole formed in the downstream partition plate and is silenced, or the resonance of the downstream partition plate. It is silenced by the action.
本発明によれば、内燃機関の排ガス処理装置において、強度低下、コストＵＰ、及び装置の大型化を招くことなく、また、排気騒音の低減に活用できる消音容積を縮小させることもなく、排気抵抗を低減するとともに、断熱性を増加させることができる。 According to the present invention, in an exhaust gas treatment apparatus for an internal combustion engine, exhaust resistance is reduced without causing a decrease in strength, an increase in cost, and an increase in the size of the apparatus, and without reducing a silencing volume that can be used for reducing exhaust noise. Can be reduced, and the heat insulation can be increased.
以下、添付図面を参照しながら、本発明の実施形態について説明する。図１は本発明の一実施形態に係る排ガス処理装置１０を示す概略断面図、図２は本発明の他の実施形態に係る排ガス処理装置２０の表面温度測定結果を示す図である。但し、図３に示した従来の排ガス処理装置３０と同一若しくは類似の箇所には同一の符号を付すとともに、新たに追加した箇所若しくは変更した箇所にのみ新たな符号を付すこととし、本発明の主要部を中心に説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view showing an exhaust gas treatment apparatus 10 according to an embodiment of the present invention, and FIG. 2 is a diagram showing a surface temperature measurement result of an exhaust gas treatment apparatus 20 according to another embodiment of the present invention. However, the same or similar parts as those of the conventional exhaust gas treatment apparatus 30 shown in FIG. 3 are denoted by the same reference numerals, and only newly added or changed parts are denoted by new reference numerals. The explanation will focus on the main part.
図１に示すように、排ガス処理装置１０は、内部に排ガス流路が形成されたハウジング１と、ハウジング１の上流側端部１ａから挿入された排ガス導入管６と、上流側仕切板５と、排ガス浄化部２と、下流側仕切板９と、ハウジング１の下流側端部１ｂから挿入された排ガス導出管１１と、を備えている。 As shown in FIG. 1, the exhaust gas treatment device 10 includes a housing 1 in which an exhaust gas passage is formed, an exhaust gas introduction pipe 6 inserted from an upstream end 1 a of the housing 1, an upstream partition plate 5, and the like. The exhaust gas purification unit 2, the downstream partition plate 9, and the exhaust gas outlet pipe 11 inserted from the downstream end 1b of the housing 1 are provided.
ハウジング１内には、中心部付近に排ガス浄化材（例えば、触媒等）を担持する排ガス浄化部２が設けられ、排ガス浄化部２より上流側の領域は上流側仕切板５で区画されるとともに、排ガス浄化部２より下流側の領域は下流側仕切板９で区画されている。そして、ハウジング１と排ガス導入管６とで囲繞された空間には、上流側消音室３が形成され、ハウジング１と排ガス導出管１１とで囲繞された空間には、下流側消音室８が形成されている。また、上流側仕切板５と排ガス浄化部２との間には、上流側空間部４が形成され、下流側仕切板９と排ガス浄化部２との間には、下流側空間部７が形成されている。 In the housing 1, an exhaust gas purification unit 2 that supports an exhaust gas purification material (for example, a catalyst or the like) is provided in the vicinity of the center, and a region upstream of the exhaust gas purification unit 2 is partitioned by an upstream partition plate 5. A region downstream of the exhaust gas purification unit 2 is partitioned by a downstream partition plate 9. An upstream silencing chamber 3 is formed in the space surrounded by the housing 1 and the exhaust gas introduction pipe 6, and a downstream silencing chamber 8 is formed in the space surrounded by the housing 1 and the exhaust gas outlet pipe 11. Has been. Further, an upstream space portion 4 is formed between the upstream partition plate 5 and the exhaust gas purification portion 2, and a downstream space portion 7 is formed between the downstream partition plate 9 and the exhaust gas purification portion 2. Has been.
上流側仕切板５には、その外周部に上流側消音室３と上流側空間部４とを連通するパンチ孔５ａが形成されており、その中心部には開放口５ｂが形成されている。他方、下流側仕切板９には、その外周部に下流側空間部７と下流側消音室８とを連通するパンチ孔９ａが形成されており、その中心部には開放口９ｂが形成されている。 The upstream partition plate 5 is formed with a punch hole 5a communicating with the upstream silencing chamber 3 and the upstream space portion 4 on the outer peripheral portion thereof, and an opening 5b is formed at the center thereof. On the other hand, the downstream partition plate 9 is formed with a punch hole 9a communicating with the downstream space portion 7 and the downstream silencing chamber 8 at the outer peripheral portion, and an opening 9b is formed at the center thereof. Yes.
排ガス導入管６は、上流側消音室３を貫通するとともに、下流側管口６ｂが上流側仕切板５の開放口５ｂに接続されており、下流側管口６ｂの全断面が上流側空間部４に開放されている。また、排ガス導出管１１は、下流側消音室８を貫通するとともに、上流側管口１１ｂが下流側仕切板９の開放口９ｂに接続されており、上流側管口１１ｂの全断面が下流側空間部７に開放されている。 The exhaust gas introduction pipe 6 penetrates the upstream side silencing chamber 3, the downstream side pipe port 6 b is connected to the open port 5 b of the upstream side partition plate 5, and the entire cross section of the downstream side pipe port 6 b is the upstream side space portion. 4 is open. Further, the exhaust gas outlet pipe 11 penetrates the downstream side silencing chamber 8, and the upstream side pipe port 11b is connected to the open port 9b of the downstream side partition plate 9, and the entire cross section of the upstream side pipe port 11b is on the downstream side. The space 7 is open.
すなわち、排ガス導入管６は、その下流側管口６ｂが上流側仕切板５で閉塞されることなく上流側空間部４に開放されており、しかも上流側消音室３を貫通する領域にはパンチ孔（例えば、図３に示したパンチ孔６ａ参照）が形成されていない。また、排ガス導出管１１は、その上流側管口１１ｂが下流側仕切板９で閉塞されることなく下流側空間部７に開放されており、しかも下流側消音室８を貫通する領域にはパンチ孔（例えば、図３に示したパンチ孔１１ａ参照）が形成されていない。なお、同図において、下流側管口６ｂと開放口５ｂ、及び上流側管口１１ｂと開放口９ｂは、それぞれ同一形状であるが、下流側管口６ｂ、上流側管口１１ｂの大部分がそれぞれ上流側空間部４、下流側空間部７に開放されていれば、異なる形状であってもよい。 That is, the exhaust gas introduction pipe 6 is opened to the upstream space portion 4 without the downstream pipe port 6b being closed by the upstream partition plate 5, and is punched in a region penetrating the upstream silencing chamber 3. No hole (for example, see the punch hole 6a shown in FIG. 3) is formed. Further, the exhaust gas outlet pipe 11 is opened to the downstream space portion 7 without the upstream side pipe port 11b being closed by the downstream side partition plate 9, and is punched in a region penetrating the downstream side silencing chamber 8. No hole (for example, see the punch hole 11a shown in FIG. 3) is formed. In the figure, the downstream port 6b and the open port 5b, and the upstream port 11b and the open port 9b have the same shape, but most of the downstream port 6b and the upstream port 11b are the same. Different shapes may be used as long as they are open to the upstream space 4 and the downstream space 7, respectively.
従って、排ガス導入管６から導入された排ガスは、上流側消音室３を迂回ことなく排ガス導入管６内を直進して上流側空間部４まで到達し、その下流側の排ガス浄化部２で浄化される。排ガス浄化部２での浄化効率は、排ガス温度が高いほど高くなる傾向にあり、排ガスは、排ガス導入管６内を直進する際に、上流側消音室３で囲まれた二重管構造により保温されるので、排ガス浄化部２での浄化効率が向上する。なお、排ガスは、上流側空間部４を通過する際に、上流側仕切板５に形成された孔５ａにより消音される。 Therefore, the exhaust gas introduced from the exhaust gas introduction pipe 6 goes straight through the exhaust gas introduction pipe 6 without bypassing the upstream side silencing chamber 3 and reaches the upstream space portion 4 and is purified by the exhaust gas purification section 2 on the downstream side thereof. Is done. The purification efficiency in the exhaust gas purification unit 2 tends to increase as the exhaust gas temperature increases, and the exhaust gas is kept warm by a double tube structure surrounded by the upstream silencing chamber 3 when going straight in the exhaust gas introduction pipe 6. Therefore, the purification efficiency in the exhaust gas purification unit 2 is improved. The exhaust gas is silenced by the holes 5 a formed in the upstream partition plate 5 when passing through the upstream space 4.
さらに、排ガス浄化部２で浄化された排ガスは、下流側空間部４を通過し、その大部分が下流側消音室８を迂回ことなく排ガス導出管１１内に直接取り込まれ、排ガス導出管１１内を直進して導出される。排ガスは、排ガス導出管１１内を直進する際に、下流側消音室８で囲まれた二重管構造により保温される。また、排ガスは、下流側空間部４を通過する際に、その一部が下流側仕切板９に形成されたパンチ孔９aから下流側消音室８内に流れ込んで消音され、或いは下流側仕切板９の共鳴作用により消音される。 Further, the exhaust gas purified by the exhaust gas purification unit 2 passes through the downstream space portion 4, and most of the exhaust gas is directly taken into the exhaust gas outlet pipe 11 without bypassing the downstream silencing chamber 8. It is derived by going straight on. When the exhaust gas travels straight through the exhaust gas outlet pipe 11, the exhaust gas is kept warm by the double pipe structure surrounded by the downstream-side silencer chamber 8. Further, when the exhaust gas passes through the downstream space portion 4, a part thereof flows into the downstream silencing chamber 8 from the punch holes 9 a formed in the downstream partition plate 9 and is silenced, or the downstream partition plate. The sound is silenced by the resonance action of 9.
以上の構成によれば、排ガス導入管６及び排ガス導出管１１には、上流側消音室３若しくは下流側消音室８を貫通する領域にパンチ孔（図３に示したパンチ孔６ａ，１１ａ参照）が形成されていない。そのため、排ガスがこれらの管内及び消音室を流れる際に管壁等から抵抗を受けにくくなり、排気抵抗が低減する。従って、排ガス導入管６及び排ガス導出管１１にパンチ孔を形成した場合と異なり、上流側仕切板５、下流側仕切板９、排ガス導入管６、及び排ガス導出管１１の強度低下を招くものではない。 According to the above configuration, the exhaust gas introduction pipe 6 and the exhaust gas outlet pipe 11 have punch holes in the region penetrating the upstream silencing chamber 3 or the downstream silencing chamber 8 (see punch holes 6a and 11a shown in FIG. 3). Is not formed. Therefore, when the exhaust gas flows through these pipes and the sound deadening chamber, it becomes difficult to receive resistance from the pipe wall or the like, and the exhaust resistance is reduced. Therefore, unlike the case where punch holes are formed in the exhaust gas introduction pipe 6 and the exhaust gas outlet pipe 11, the strength of the upstream side partition plate 5, the downstream side partition plate 9, the exhaust gas introduction pipe 6 and the exhaust gas outlet pipe 11 is not reduced. Absent.
また、排ガス処理装置２０内に導入された排ガスは、断熱性の二重管構造により、上流側消音室３及び下流側消音室８の双方で保温される。そのため、従来の排ガス処理装置３０とは異なり、装置本体の外部に断熱カバー１２ａ，１２ｂ，１２ｃを設置したり、或いは装置本体の内部にプレート１３を設置する必要がない。従って、外部寸法が増えたり、内部寸法が小さくなるものではない。 Further, the exhaust gas introduced into the exhaust gas treatment device 20 is kept warm in both the upstream silencing chamber 3 and the downstream silencing chamber 8 by a heat insulating double pipe structure. Therefore, unlike the conventional exhaust gas treatment apparatus 30, there is no need to install the heat insulating covers 12a, 12b, 12c outside the apparatus main body or the plate 13 inside the apparatus main body. Therefore, the external dimension does not increase and the internal dimension does not decrease.
さらに、本実施形態の構成によれば、排ガスが上流側（上流側消音室３、上流側仕切板５のパンチ孔５ａ）のみならず、下流側（下流側消音室８、下流側仕切板９のパンチ孔９ａ）でも消音されることとなり、排ガスの消音効果は十分に担保される。 Furthermore, according to the configuration of this embodiment, the exhaust gas is not only upstream (upstream silencing chamber 3, punch hole 5a of upstream partition plate 5), but also downstream (downstream silencing chamber 8, downstream partition plate 9). The punch holes 9a) are also silenced, and the silencing effect of the exhaust gas is sufficiently ensured.
以上のように、本実施形態の構成によれば、コストＵＰや、装置の大型化を招くことなく、また、消音容積を縮小させることもなく、排気抵抗を低減するとともに、断熱性を増加させることができるようになる。 As described above, according to the configuration of the present embodiment, the exhaust resistance is reduced and the heat insulation is increased without increasing the cost, increasing the size of the apparatus, or reducing the sound deadening volume. Will be able to.
次に、本発明の断熱性増加効果を確認すべく、排ガス処理装置の表面温度を測定した。その測定結果を図２に示す。但し、本実施例で用いた排ガス処理装置は、図１に示した排ガス処理装置１０と異なり、下流側のみが断熱構造であり、上流側は非断熱構造である。その他の構造は図１に示した構造と同様である。比較例で用いた排ガス処理装置は、図３に示した排ガス処理装置３０と同様、上流側及び下流側がいずれも非断熱構造である。 Next, the surface temperature of the exhaust gas treatment apparatus was measured in order to confirm the heat insulation increase effect of the present invention. The measurement results are shown in FIG. However, unlike the exhaust gas treatment apparatus 10 shown in FIG. 1, the exhaust gas treatment apparatus used in this example has a heat insulation structure only on the downstream side and a non-heat insulation structure on the upstream side. Other structures are the same as those shown in FIG. The exhaust gas treatment apparatus used in the comparative example has a non-adiabatic structure on both the upstream side and the downstream side, similarly to the exhaust gas treatment apparatus 30 shown in FIG.
すなわち、本実施例で用いた排ガス処理装置（図２（ａ）参照）において、下流側仕切板９には、排ガス導出管１１の上流側管口１１ｂを下流側空間部７に開放するための開放口９ｂが形成され、且つ排ガス導出管１１には、下流側消音室８を貫通する領域に孔（図１に示したパンチ孔１１ａ参照）が形成されていない（図１の下流側参照）。但し、上流側仕切板５には、排ガス導入管６の下流側管口６ｂを上流側空間部４に開放するための開放口５ｂが形成されておらず、且つ排ガス導入管６には、上流側消音室３を貫通する領域にパンチ孔６ａが形成されている（図３の上流側参照）。 That is, in the exhaust gas treatment apparatus used in the present embodiment (see FIG. 2A), the downstream partition plate 9 is used to open the upstream side port 11b of the exhaust gas outlet pipe 11 to the downstream side space portion 7. The opening 9b is formed, and the exhaust gas outlet pipe 11 is not formed with a hole (see the punch hole 11a shown in FIG. 1) in a region penetrating the downstream silencing chamber 8 (see the downstream side in FIG. 1). . However, the upstream partition plate 5 is not formed with an opening 5b for opening the downstream port 6b of the exhaust gas introduction pipe 6 to the upstream space 4, and the exhaust gas introduction pipe 6 has an upstream side. A punch hole 6a is formed in a region penetrating the side silencing chamber 3 (see the upstream side in FIG. 3).
一方、比較例で用いた排ガス処理装置（図２（ｂ）参照）において、上流側仕切板５には、排ガス導入管６の下流側管口６ｂを上流側空間部４に開放するための開放口が形成されておらず、且つ排ガス導入管６には、上流側消音室３を貫通する領域にパンチ孔６ａが形成されている（図３の上流側参照）。また、下流側仕切板９にも、排ガス導出管１１の上流側管口１１ｂを下流側空間部７に開放するための開放口が形成されておらず、且つ排ガス導出管１１には、下流側消音室８を貫通する領域にパンチ孔１１ａが形成されている（図３の下流側参照）。 On the other hand, in the exhaust gas treatment apparatus used in the comparative example (see FIG. 2B), the upstream side partition plate 5 is opened to open the downstream side port 6b of the exhaust gas introduction pipe 6 to the upstream side space portion 4. No opening is formed, and the exhaust gas introduction pipe 6 is formed with a punch hole 6a in a region penetrating the upstream silencing chamber 3 (see the upstream side in FIG. 3). Further, the downstream partition plate 9 is not formed with an opening for opening the upstream port 11b of the exhaust gas outlet pipe 11 to the downstream space portion 7, and the exhaust gas outlet pipe 11 has a downstream side. A punch hole 11a is formed in a region penetrating the silencer chamber 8 (see the downstream side in FIG. 3).
図２（ａ）及び（ｂ）に示すように、本実施例と比較例とを比較すると、上流側の非断熱構造部及び中央付近の触媒部では、表面温度がほぼ同じ温度状態であった。しかし、下流側では異なった温度状態となり、本実施例の場合には表面温度が３２９℃を示す一方、比較例の場合にはこれよりも高温の４４５℃を示した。このことは、本実施例の場合、比較例の場合よりも下流側が放熱されにくい断熱構造となっており、そのために表面温度が低くなったことを示唆する。従って、本実施例の構成によれば、比較例の構成と比べると、断熱性の増加という点で優れた効果を奏する。 As shown in FIGS. 2 (a) and 2 (b), when this example and the comparative example were compared, the surface temperature was almost the same in the upstream non-adiabatic structure part and the catalyst part near the center. . However, the temperature was different on the downstream side, and in the case of this example, the surface temperature showed 329 ° C., whereas in the case of the comparative example, 445 ° C., which was higher than this, was shown. This suggests that in the case of the present example, the downstream side has a heat insulating structure that is less likely to dissipate heat than in the case of the comparative example, and thus the surface temperature is lowered. Therefore, according to the configuration of the present embodiment, an excellent effect can be obtained in terms of an increase in heat insulation as compared with the configuration of the comparative example.
ところで、本実施例で用いた排ガス処理装置は、下流側のみが断熱構造であり、上流側は非断熱構造である。しかし、本発明の構成は、かかる構成に限定されるものではなく、上流側のみ断熱構造とし、下流側は非断熱構造としてもよい。すなわち、上流側仕切板５には、排ガス導入管６の下流側管口６ｂを上流側空間部４に開放するための開放口５ｂが形成され、且つ排ガス導入管６には、上流側消音室３を貫通する領域に孔６ａが形成されていないこととし、他方、下流側仕切板９には、排ガス導出管１１の上流側管口１１ｂを下流側空間部７に開放するための開放口９ｂが形成されておらず、且つ排ガス導出管１１には、下流側消音室８を貫通する領域に孔（図１に示したパンチ孔１１ａ参照）が形成されていることとしてもよい。かかる構成とした場合にも、排ガス処理装置内に導入された排ガスは、上流側の二重管構造により保温され、前述と同様の効果を奏する。 By the way, the exhaust gas treatment apparatus used in this example has a heat insulating structure only on the downstream side and a non-heat insulating structure on the upstream side. However, the configuration of the present invention is not limited to such a configuration, and only the upstream side may have a heat insulating structure and the downstream side may have a non-heat insulating structure. That is, the upstream partition plate 5 is formed with an opening 5b for opening the downstream port 6b of the exhaust gas introduction pipe 6 to the upstream space 4, and the exhaust gas introduction pipe 6 has an upstream silencing chamber. 3, the hole 6 a is not formed in the region penetrating through 3. On the other hand, the downstream partition plate 9 has an opening 9 b for opening the upstream port 11 b of the exhaust gas outlet tube 11 to the downstream space 7. Is not formed, and the exhaust gas outlet pipe 11 may be formed with a hole (see the punch hole 11a shown in FIG. 1) in a region penetrating the downstream silencing chamber 8. Even in such a configuration, the exhaust gas introduced into the exhaust gas treatment device is kept warm by the upstream double tube structure, and the same effect as described above is obtained.
１ ハウジング
２ 排ガス浄化部
３ 上流側消音室
４ 上流側空間部
５（５ａ，５ｂ） 上流側仕切板（パンチ孔，開放口）
６（６ａ，６ｂ） 排ガス導入管（パンチ孔，下流側管口）
７ 下流側空間部
８ 下流側消音室
９（９ａ，９ｂ） 下流側仕切板（パンチ孔，開放口）
１１（１１ａ，１１ｂ） 排ガス導出管（パンチ孔，上流側管口）
１０、２０、３０ 内燃機関の排ガス処理装置
DESCRIPTION OF SYMBOLS 1 Housing 2 Exhaust gas purification part 3 Upstream side muffler chamber 4 Upstream space part 5 (5a, 5b) Upstream partition plate (punch hole, opening)
6 (6a, 6b) Exhaust gas introduction pipe (punch hole, downstream pipe port)
7 Downstream space 8 Downstream silencer chamber 9 (9a, 9b) Downstream partition plate (punch hole, opening)
11 (11a, 11b) Exhaust gas outlet pipe (punch hole, upstream side pipe port)
10, 20, 30 Exhaust gas treatment apparatus for internal combustion engine
Claims (3)
内部に排ガス流路が形成されたハウジングと、
前記排ガス流路中に設けられ排ガス浄化材を担持する排ガス浄化部と、
前記ハウジング内の領域のうち前記排ガス浄化部より上流側の領域を上流側から順に上流側消音室と上流側空間部とに区画し、該上流側消音室と該上流側空間部とを連通する孔が形成された上流側仕切板と、
前記ハウジングの上流側端部及び前記上流側消音室を貫通するとともに、下流側管口が前記上流側仕切板に接続された排ガス導入管と、
前記ハウジング内の領域のうち前記排ガス浄化部より下流側の領域を上流側から順に下流側空間部と下流側消音室とに区画し、該下流側空間部と該下流側消音室とを連通する孔が形成された下流側仕切板と、
前記ハウジングの下流側端部及び前記下流側消音室を貫通するとともに、上流側管口が前記下流側仕切板に接続された排ガス導出管と、
を備え、
前記上流側仕切板には、前記排ガス導入管の前記下流側管口を前記上流側空間部に開放するための開放口が形成され、且つ前記排ガス導入管には、前記上流側消音室を貫通する領域に孔が形成されていないことを特徴とする排ガス処理装置。 An exhaust gas treatment apparatus for an internal combustion engine that performs a silencing process and a purification process for exhaust gas discharged from the internal combustion engine,
A housing having an exhaust gas flow path formed therein;
An exhaust gas purification unit that is provided in the exhaust gas flow path and carries an exhaust gas purification material;
A region upstream of the exhaust gas purification unit in the housing is partitioned into an upstream silencing chamber and an upstream space portion in order from the upstream side, and the upstream silencing chamber communicates with the upstream space portion. An upstream divider plate with holes formed therein;
An exhaust gas introduction pipe penetrating the upstream end portion of the housing and the upstream silencing chamber and having a downstream pipe port connected to the upstream partition plate;
Of the region in the housing, a region downstream from the exhaust gas purification unit is partitioned in order from the upstream side into a downstream space portion and a downstream silencing chamber, and the downstream space portion and the downstream silencing chamber communicate with each other. A downstream partition plate in which holes are formed;
An exhaust gas outlet pipe penetrating the downstream end of the housing and the downstream silencing chamber, and an upstream pipe port connected to the downstream partition plate;
With
The upstream partition plate is formed with an opening for opening the downstream pipe port of the exhaust gas introduction pipe to the upstream space portion, and the exhaust gas introduction pipe penetrates the upstream silencing chamber. An exhaust gas treatment apparatus characterized in that no hole is formed in a region to be used.
内部に排ガス流路が形成されたハウジングと、
前記排ガス流路中に設けられ排ガス浄化材を担持する排ガス浄化部と、
前記ハウジング内の領域のうち前記排ガス浄化部より上流側の領域を上流側から順に上流側消音室と上流側空間部とに区画し、該上流側消音室と該上流側空間部とを連通する孔が形成された上流側仕切板と、
前記ハウジングの上流側端部及び前記上流側消音室を貫通するとともに、下流側管口が前記上流側仕切板に接続された排ガス導入管と、
前記ハウジング内の領域のうち前記排ガス浄化部より下流側の領域を上流側から順に下流側空間部と下流側消音室とに区画し、該下流側空間部と該下流側消音室とを連通する孔が形成された下流側仕切板と、
前記ハウジングの下流側端部及び前記下流側消音室を貫通するとともに、上流側管口が前記下流側仕切板に接続された排ガス導出管と、
を備え、
前記下流側仕切板には、前記排ガス導出管の前記上流側管口を前記下流側空間部に開放するための開放口が形成され、且つ前記排ガス導出管には、前記下流側消音室を貫通する領域に孔が形成されていないことを特徴とする排ガス処理装置。 An exhaust gas treatment apparatus for an internal combustion engine that performs a silencing process and a purification process for exhaust gas discharged from the internal combustion engine,
A housing having an exhaust gas flow path formed therein;
An exhaust gas purification unit that is provided in the exhaust gas flow path and carries an exhaust gas purification material;
A region upstream of the exhaust gas purification unit in the housing is partitioned into an upstream silencing chamber and an upstream space portion in order from the upstream side, and the upstream silencing chamber communicates with the upstream space portion. An upstream divider plate with holes formed therein;
An exhaust gas introduction pipe penetrating the upstream end portion of the housing and the upstream silencing chamber and having a downstream pipe port connected to the upstream partition plate;
Of the region in the housing, a region downstream from the exhaust gas purification unit is partitioned in order from the upstream side into a downstream space portion and a downstream silencing chamber, and the downstream space portion and the downstream silencing chamber communicate with each other. A downstream partition plate in which holes are formed;
An exhaust gas outlet pipe penetrating the downstream end of the housing and the downstream silencing chamber, and an upstream pipe port connected to the downstream partition plate;
With
The downstream partition plate is formed with an opening for opening the upstream pipe port of the exhaust gas outlet pipe to the downstream space portion, and the exhaust gas outlet pipe passes through the downstream silencing chamber. An exhaust gas treatment apparatus characterized in that no hole is formed in a region to be used.
内部に排ガス流路が形成されたハウジングと、
前記排ガス流路中に設けられ排ガス浄化材を担持する排ガス浄化部と、
前記ハウジング内の領域のうち前記排ガス浄化部より上流側の領域を上流側から順に上流側消音室と上流側空間部とに区画し、該上流側消音室と該上流側空間部とを連通する孔が形成された上流側仕切板と、
前記ハウジングの上流側端部及び前記上流側消音室を貫通するとともに、下流側管口が前記上流側仕切板に接続された排ガス導入管と、
前記ハウジング内の領域のうち前記排ガス浄化部より下流側の領域を上流側から順に下流側空間部と下流側消音室とに区画し、該下流側空間部と該下流側消音室とを連通する孔が形成された下流側仕切板と、
前記ハウジングの下流側端部及び前記下流側消音室を貫通するとともに、上流側管口が前記下流側仕切板に接続された排ガス導出管と、
を備え、
前記上流側仕切板には、前記排ガス導入管の前記下流側管口を前記上流側空間部に開放するための開放口が形成され、且つ前記排ガス導入管には、前記上流側消音室を貫通する領域に孔が形成されておらず、
前記下流側仕切板には、前記排ガス導出管の前記上流側管口を前記下流側空間部に開放するための開放口が形成され、且つ前記排ガス導出管には、前記下流側消音室を貫通する領域に孔が形成されていないことを特徴とする排ガス処理装置。
An exhaust gas treatment apparatus for an internal combustion engine that performs a silencing process and a purification process for exhaust gas discharged from the internal combustion engine,
A housing having an exhaust gas flow path formed therein;
An exhaust gas purification unit that is provided in the exhaust gas flow path and carries an exhaust gas purification material;
A region upstream of the exhaust gas purification unit in the housing is partitioned into an upstream silencing chamber and an upstream space portion in order from the upstream side, and the upstream silencing chamber communicates with the upstream space portion. An upstream divider plate with holes formed therein;
An exhaust gas introduction pipe penetrating the upstream end portion of the housing and the upstream silencing chamber and having a downstream pipe port connected to the upstream partition plate;
Of the region in the housing, a region downstream from the exhaust gas purification unit is partitioned in order from the upstream side into a downstream space portion and a downstream silencing chamber, and the downstream space portion and the downstream silencing chamber communicate with each other. A downstream partition plate in which holes are formed;
An exhaust gas outlet pipe penetrating the downstream end of the housing and the downstream silencing chamber, and an upstream pipe port connected to the downstream partition plate;
With
The upstream partition plate is formed with an opening for opening the downstream pipe port of the exhaust gas introduction pipe to the upstream space portion, and the exhaust gas introduction pipe penetrates the upstream silencing chamber. There are no holes in the area
The downstream partition plate is formed with an opening for opening the upstream pipe port of the exhaust gas outlet pipe to the downstream space portion, and the exhaust gas outlet pipe passes through the downstream silencing chamber. An exhaust gas treatment apparatus characterized in that no hole is formed in a region to be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006047196A JP2007224825A (en) | 2006-02-23 | 2006-02-23 | Exhaust gas treatment device for internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006047196A JP2007224825A (en) | 2006-02-23 | 2006-02-23 | Exhaust gas treatment device for internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| JP2007224825A true JP2007224825A (en) | 2007-09-06 |
Family
ID=38546862
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006047196A Pending JP2007224825A (en) | 2006-02-23 | 2006-02-23 | Exhaust gas treatment device for internal combustion engine |
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| JP (1) | JP2007224825A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101498182B1 (en) * | 2014-11-25 | 2015-03-04 | 세종공업 주식회사 | Exhaust gas purification apparatus |
| CN115434797A (en) * | 2022-09-26 | 2022-12-06 | 无锡宝顺不锈钢有限公司 | Stainless steel band for automobile exhaust system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141050A (en) * | 1996-11-07 | 1998-05-26 | Hino Motors Ltd | Muffler with built-in catalyst |
| JP2001152827A (en) * | 1999-11-26 | 2001-06-05 | Tokyo Roki Co Ltd | Catalyst muffler |
| JP2001271628A (en) * | 2000-03-29 | 2001-10-05 | Hoei Kogyo Kk | Catalyst element integrated-type muffler for internal combustion engine |
-
2006
- 2006-02-23 JP JP2006047196A patent/JP2007224825A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141050A (en) * | 1996-11-07 | 1998-05-26 | Hino Motors Ltd | Muffler with built-in catalyst |
| JP2001152827A (en) * | 1999-11-26 | 2001-06-05 | Tokyo Roki Co Ltd | Catalyst muffler |
| JP2001271628A (en) * | 2000-03-29 | 2001-10-05 | Hoei Kogyo Kk | Catalyst element integrated-type muffler for internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101498182B1 (en) * | 2014-11-25 | 2015-03-04 | 세종공업 주식회사 | Exhaust gas purification apparatus |
| CN115434797A (en) * | 2022-09-26 | 2022-12-06 | 无锡宝顺不锈钢有限公司 | Stainless steel band for automobile exhaust system |
| CN115434797B (en) * | 2022-09-26 | 2024-03-26 | 无锡宝顺不锈钢有限公司 | Stainless steel belt for automobile exhaust system |
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