JP2016125475A - Exhaust emission control device - Google Patents
Exhaust emission control device Download PDFInfo
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- JP2016125475A JP2016125475A JP2015002454A JP2015002454A JP2016125475A JP 2016125475 A JP2016125475 A JP 2016125475A JP 2015002454 A JP2015002454 A JP 2015002454A JP 2015002454 A JP2015002454 A JP 2015002454A JP 2016125475 A JP2016125475 A JP 2016125475A
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 70
- 230000001154 acute effect Effects 0.000 claims abstract description 6
- 238000000746 purification Methods 0.000 claims description 82
- 238000007599 discharging Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 45
- 239000003054 catalyst Substances 0.000 description 33
- 230000003647 oxidation Effects 0.000 description 33
- 238000007254 oxidation reaction Methods 0.000 description 33
- 230000007423 decrease Effects 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000004887 air purification Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
本発明は、排気浄化装置に関する。 The present invention relates to an exhaust emission control device.
エンジンの排気通路における直線区間に並べて配置された酸化触媒とフィルタとから構成される排気浄化装置が知られている（特許文献１）。このような排気浄化装置は、上流側の酸化触媒と下流側のフィルタが近接して配置されており、高温の状態で排気がフィルタに到達し、また、酸化触媒を通過した排気は、フィルタの前面（上流側に面した部分）全体に均一に衝突する。このため、良好な浄化性能を得ることができる。 There is known an exhaust emission control device including an oxidation catalyst and a filter arranged side by side in a straight section in an exhaust passage of an engine (Patent Document 1). In such an exhaust purification device, the upstream side oxidation catalyst and the downstream side filter are arranged close to each other, the exhaust gas reaches the filter at a high temperature, and the exhaust gas that has passed through the oxidation catalyst is Collides uniformly with the entire front surface (portion facing the upstream side). For this reason, good purification performance can be obtained.
しかしながら、特許文献１に記載の排気浄化装置は、酸化触媒とフィルタが直線状に配置されているため、細長い形状になってしまい、搭載可能な場所が限られていた。
本発明は、排気の浄化性能の低下を抑えつつ、排気浄化装置を様々な場所に搭載できるようにすることを目的とする。
However, the exhaust gas purification device described in Patent Document 1 has an elongated shape because the oxidation catalyst and the filter are arranged in a straight line, and the place where the exhaust gas purification device can be mounted is limited.
An object of the present invention is to enable an exhaust purification device to be mounted in various places while suppressing a decrease in exhaust purification performance.
本発明の一側面は、エンジンからの排気が通過する管状の部材であって、上流区間と、上流区間の下流側に位置する下流区間と、上流区間の終端と下流区間の始端とを繋ぐ接続区間とを有し、接続区間にて鋭角に屈曲している排気経路と、上流区間に配され、当該部位を通過する排気を浄化するための処置を施す上流側浄化部と、下流区間に配され、当該部位を通過する排気を浄化するための処置を施す下流側浄化部と、を備え、上流区間の方向と下流区間の方向とに直交する方向を、幅方向とし、接続区間には、上流側浄化部に対面する対面壁部が形成されており、対面壁部における幅方向の中央部分には、排気経路の上流側から下流側に向かって伸びる細長い領域であり、排気経路の外部に向かって突出した形状となっている第１突出部が形成されていること、を特徴とする排気浄化装置に関するものである。 One aspect of the present invention is a tubular member through which exhaust from an engine passes, and connects an upstream section, a downstream section located downstream of the upstream section, and a terminal end of the upstream section and a starting end of the downstream section. An exhaust path that is bent at an acute angle in the connection section, an upstream purification section that is disposed in the upstream section and that performs a treatment for purifying the exhaust gas that passes through the section, and is disposed in the downstream section. And a downstream side purification unit that performs a treatment for purifying the exhaust gas passing through the part, and a direction perpendicular to the direction of the upstream section and the direction of the downstream section is a width direction, A facing wall portion facing the upstream purification portion is formed, and a central portion in the width direction of the facing wall portion is an elongated region extending from the upstream side to the downstream side of the exhaust path, and is located outside the exhaust path. 1st protrusion part which becomes the shape which protruded toward That it is formed, to an exhaust gas control apparatus according to claim.
このような構成によれば、上流側浄化部と下流側浄化部とがより集約された状態で配されるため、排気浄化装置を小型化することができる。
また、排気経路における上流側浄化部と下流側浄化部とを繋ぐ部分は急激なカーブを形成しており、該カーブの外側を通過して下流側浄化部に到達する経路は、内側を通過する経路に比べ大幅に長くなる。つまり、該カーブの外側を通過する排気は、内側を通過する排気に比べ、下流側浄化部への到達時間が長くなる。このため、下流側浄化部の入口面（下流側浄化部の外面における下流側に面した部分）の内側部分は、外側部分に比べ、排気が衝突する量が多くなり、入口面全体に均一に排気が衝突しなくなるため、下流側浄化部の浄化性能が低下する。
According to such a configuration, since the upstream side purification unit and the downstream side purification unit are arranged in a more integrated state, the exhaust purification device can be reduced in size.
Further, a portion connecting the upstream side purification unit and the downstream side purification unit in the exhaust path forms a sharp curve, and a path that passes through the outside of the curve and reaches the downstream side purification unit passes through the inside. Significantly longer than the route. That is, the exhaust gas passing outside the curve has a longer time to reach the downstream purification unit than the exhaust gas passing through the inside. For this reason, the inner part of the inlet surface of the downstream purification unit (the part facing the downstream side of the outer surface of the downstream purification unit) has a larger amount of exhaust collision than the outer part, and is uniform over the entire inlet surface. Since the exhaust does not collide, the purification performance of the downstream purification unit decreases.
これに対し、上流側浄化部に対面して配された（換言すれば、該カーブの外側に沿って配された）対面壁部には、第１突出部が形成されている。このため、該カーブの外側を通過する排気は、第１突出部により形成された空間に進入し、これにより、該排気の流路の断面積が狭められるため、外側を通過する排気の流速が向上する。その結果、外側を通過する排気の下流側浄化部への到達時間と、内側を通過する排気の該到達時間を同程度とすることが可能となり、排気が下流側浄化部の入口面全体に均一に衝突するようになるため、下流側浄化部の浄化性能の低下を抑制できる。 On the other hand, the 1st protrusion part is formed in the facing wall part arrange | positioned facing the upstream purification | cleaning part (in other words, it distribute | arranged along the outer side of this curve). For this reason, the exhaust gas passing outside the curve enters the space formed by the first projecting portion, and thereby the cross-sectional area of the exhaust gas flow path is narrowed. improves. As a result, it is possible to make the arrival time of the exhaust passing through the outer side to the downstream purification unit and the arrival time of the exhaust passing through the inner side approximately the same, and the exhaust is uniform over the entire inlet surface of the downstream purification unit. Therefore, it is possible to suppress a decrease in the purification performance of the downstream side purification unit.
したがって、排気の浄化性能の低下を抑えつつ、排気浄化装置を様々な場所に搭載できるようになる。
また、上記構成において、下流区間において上流区間が位置する側を、内側とし、下流側浄化部における排気経路の上流側に面した部分における、最も内側寄りの位置を、内側端部とし、上流側浄化部における、当該部位を通過する排気を側方から覆う部分を、側部とし、下流側浄化部は、内側端部を通過して下流区間に沿って伸びる端部直線が、上流側浄化部の側部と交差するように配置されていても良い。
Therefore, the exhaust gas purification device can be mounted at various locations while suppressing a decrease in the exhaust gas purification performance.
In the above configuration, the side where the upstream section is located in the downstream section is the inside, and the position closest to the inside in the portion facing the upstream side of the exhaust path in the downstream purification section is the inside end, and the upstream side The part of the purification unit that covers the exhaust passing through the part from the side is defined as a side, and the downstream purification unit has an end straight line extending through the inner end and extending along the downstream section. You may arrange | position so that it may cross | intersect the side part.
このような構成によれば、下流側浄化部は、入口面の内側部分が上流側浄化部の側面に対面した状態で配されるようになり、下流側浄化部を、より一層、上流区間の上流側に寄せた状態で配置することができる。これにより、排気浄化装置における上流区間の方向の長さを短くすることができ、排気浄化装置をより小型化できる。 According to such a configuration, the downstream purification unit is arranged in a state where the inner portion of the inlet surface faces the side surface of the upstream purification unit, and the downstream purification unit is further arranged in the upstream section. It can arrange | position in the state brought near to the upstream. Thereby, the length of the direction of the upstream section in the exhaust purification apparatus can be shortened, and the exhaust purification apparatus can be further downsized.
また、上記構成において、対面壁部における幅方向の中央部分には、第１突出部の下流側の端部を含む領域に位置し、排気経路の内部に向かって突出した形状となっている第２突出部が形成されていても良い。 Moreover, in the said structure, it is located in the area | region containing the downstream edge part of a 1st protrusion part in the center part of the width direction in a facing wall part, and has the shape which protruded toward the inside of an exhaust path. Two protrusions may be formed.
このような構成によれば、上流側浄化部と下流側浄化部とを繋ぐカーブの外側を通過した排気は、対面壁部に設けられた第１突出部により形成された空間を通過し、流速が向上した状態で第２突出部に衝突する。これにより、該排気の流れの向きが内側に傾けられ、下流側浄化部の入口面の内側部分（入口面における上流側浄化部の側面に対面した部分）により多くの排気を衝突させることができる。その結果、より一層、排気が下流側浄化部の入口面全体に均一に衝突するようになり、下流側浄化部の浄化性能の低下を抑制することができる。 According to such a configuration, the exhaust gas that has passed through the outside of the curve connecting the upstream side purification unit and the downstream side purification unit passes through the space formed by the first projecting portion provided on the facing wall portion, and the flow velocity It collides with a 2nd protrusion part in the state improved. As a result, the flow direction of the exhaust gas is inclined inward, and more exhaust gas can collide with the inner portion of the inlet surface of the downstream purification unit (the portion facing the side surface of the upstream purification unit on the inlet surface). . As a result, the exhaust gas uniformly collides with the entire inlet surface of the downstream side purification unit, and the deterioration of the purification performance of the downstream side purification unit can be suppressed.
また、上記構成において、下流側浄化部における、当該部位を通過した排気が外部に出る際に通過する部分を出口面とし、下流区間には、終端における上流区間が位置する側に寄った位置に、排気を当該排気浄化装置の外部に排出する排出口が形成されていても良い。 Further, in the above configuration, in the downstream side purification section, a portion through which the exhaust gas that has passed through the portion passes outside is defined as an exit surface, and the downstream section is located at a position close to the side where the upstream section is located at the end. In addition, a discharge port for discharging the exhaust to the outside of the exhaust purification device may be formed.
ここで、排気浄化装置において上流区間が位置する側を上側、下流区間の終端が位置する側を下側とする。
下流区間の終端に排出口を設ける場合、排出口の向きによっては、排出口を設けた部分が他の部分よりも突出した形状となる場合がある。また、上流区間と下流区間とは鋭角に交差するように配されている。このため、下流区間に直交する面を下流区間の終端とした場合、終端をなす面は、上流区間に対し傾いた状態で配され、終端をなす面における上流区間が位置する側（内側）の反対側（外側）が、排気浄化装置の下端となる。
Here, in the exhaust gas purification apparatus, the side where the upstream section is located is the upper side, and the side where the end of the downstream section is located is the lower side.
When the discharge port is provided at the end of the downstream section, depending on the direction of the discharge port, the portion provided with the discharge port may have a shape protruding from the other portions. Further, the upstream section and the downstream section are arranged so as to intersect at an acute angle. For this reason, when the surface orthogonal to the downstream section is defined as the end of the downstream section, the surface forming the end is arranged in a state inclined with respect to the upstream section, and the side on the side (inside) where the upstream section is located on the surface forming the end The opposite side (outside) is the lower end of the exhaust gas purification device.
したがって、上流区間の終端における内側に寄った位置に排出口を形成した場合、排出口を設けた部分が他の部分よりも突出した形状になったとしても、該部分が、上流区間の終端の外側よりも下方に突出してしまうのを防止できる。このため、排出口を形成したことにより排気浄化装置の上下方向に長くなってしまうことを抑制できる。 Therefore, when the discharge port is formed at a position closer to the inside at the end of the upstream section, even if the portion provided with the discharge port has a shape that protrudes more than the other portions, the portion is the end of the upstream section. Protruding downward from the outside can be prevented. For this reason, it can suppress that it becomes long in the up-and-down direction of an exhaust-air-purification apparatus by having formed the exhaust port.
以下に本発明における一例としての実施形態を図面と共に説明する。
［排気浄化装置の構成］
本実施形態の排気浄化装置１は、車両３に搭載されたディーゼルエンジン２の排気を浄化する装置であり、ディーゼルエンジン２に隣接して配置される（図１，２）。以後、車両３の運転席からディーゼルエンジン２に向かって右側，左側を、単に右側，左側とする。また、車両３の前部側を前側、背部側を後側とする。排気浄化装置１は、ディーゼルエンジン２の側面に沿って配置可能となっており、本実施形態では、一例として、ディーゼルエンジン２の後面における右下の部分に沿って配置される。
Hereinafter, an exemplary embodiment of the present invention will be described with reference to the drawings.
[Configuration of exhaust purification system]
The exhaust purification device 1 of the present embodiment is a device that purifies the exhaust of the diesel engine 2 mounted on the vehicle 3, and is disposed adjacent to the diesel engine 2 (FIGS. 1 and 2). Hereinafter, the right side and the left side from the driver's seat of the vehicle 3 toward the diesel engine 2 are simply referred to as the right side and the left side. The front side of the vehicle 3 is the front side, and the back side is the rear side. The exhaust purification device 1 can be disposed along the side surface of the diesel engine 2. In the present embodiment, the exhaust purification device 1 is disposed along the lower right portion of the rear surface of the diesel engine 2 as an example.
排気浄化装置１は、排気経路１０と、入口１１と、排出口１２とを備える（図３〜５）。また、排気経路１０の内部には、酸化触媒１６とフィルタ１７が設けられている（図６）。 The exhaust emission control device 1 includes an exhaust path 10, an inlet 11, and an outlet 12 (FIGS. 3 to 5). Further, an oxidation catalyst 16 and a filter 17 are provided inside the exhaust path 10 (FIG. 6).
酸化触媒１６は、排気中に含まれる一酸化窒素（ＮＯ）や一酸化炭素（ＣＯ）や炭化水素（ＨＣ）等の物質を酸化させる。
フィルタ１７は、酸化触媒１６の下流側に配され、酸化触媒１６を通過した排気中のＰＭ（粒子状物質）を補足して燃焼させる。
The oxidation catalyst 16 oxidizes substances such as nitrogen monoxide (NO), carbon monoxide (CO), and hydrocarbon (HC) contained in the exhaust gas.
The filter 17 is arranged on the downstream side of the oxidation catalyst 16 and supplements and combusts PM (particulate matter) in the exhaust gas that has passed through the oxidation catalyst 16.
排気経路１０は、ディーゼルエンジン２からの排気を通過させる管状の部材であり、上流区間１３と、接続区間１４と、下流区間１５とを有し、接続区間１４にて鋭角に屈曲した形状となっている。 The exhaust passage 10 is a tubular member that allows the exhaust from the diesel engine 2 to pass through, and has an upstream section 13, a connection section 14, and a downstream section 15, and has a shape bent at an acute angle in the connection section 14. ing.
入口１１は、排気経路１０の始端（上流区間１３の始端）に形成された開口であり、ディーゼルエンジン２から排出された排気は、入口１１を通過して排気経路１０に進入する。 The inlet 11 is an opening formed at the start end of the exhaust path 10 (start end of the upstream section 13), and the exhaust discharged from the diesel engine 2 passes through the inlet 11 and enters the exhaust path 10.
排出口１２は、排気経路１０の終端（下流区間１５の終端）に形成された開口であり、排気浄化装置１により浄化された排気は、排出口１２を通過して当該排気浄化装置１の外部に排出される。排出口１２には、車両３の後方に延びる排気管が接続されており、排出口１２から排出された排気は、排気管に進入する。 The exhaust port 12 is an opening formed at the end of the exhaust path 10 (the end of the downstream section 15), and the exhaust gas purified by the exhaust gas purification device 1 passes through the exhaust port 12 and is outside the exhaust gas purification device 1. To be discharged. An exhaust pipe extending rearward of the vehicle 3 is connected to the exhaust port 12, and the exhaust discharged from the exhaust port 12 enters the exhaust pipe.
上流区間１３は、水平に延びる第１方向１３ａに沿って配された直線状の区間である。
一方、下流区間１５は、上流区間１３の下方に位置し、上流区間１３（第１方向１３ａ）に対し下方に傾いた状態で配された直線状の区間である。すなわち、下流区間１５は、第１方向１３ａに対し鋭角に交差する第２方向１５ａに沿って伸びており（換言すれば、斜め下方に延びており）、その始端１５ｂが、上流区間１３の終端１３ｂに隣接した状態となるように配されている。
The upstream section 13 is a linear section arranged along the first direction 13a that extends horizontally.
On the other hand, the downstream section 15 is a linear section that is positioned below the upstream section 13 and that is inclined downward with respect to the upstream section 13 (first direction 13a). That is, the downstream section 15 extends along the second direction 15a intersecting at an acute angle with respect to the first direction 13a (in other words, extends obliquely downward), and its start end 15b is the end of the upstream section 13 It is arranged so as to be adjacent to 13b.
また、接続区間１４は、上流区間１３の終端１３ｂと下流区間１５の始端１５ｂとを繋ぐ区間である。
そして、上流区間１３の終端部分には、酸化触媒１６が配されており、上流区間１３を通過する排気は、全て酸化触媒１６を通過する。酸化触媒１６は、第１方向１３ａに沿って配された状態となる。無論、酸化触媒１６の配置位置はこれに限らず、該配置位置よりも上流区間１３の始端寄りに配されていても良い。
The connection section 14 is a section that connects the terminal end 13 b of the upstream section 13 and the start end 15 b of the downstream section 15.
An oxidation catalyst 16 is disposed at the end portion of the upstream section 13, and all exhaust gas passing through the upstream section 13 passes through the oxidation catalyst 16. The oxidation catalyst 16 is placed along the first direction 13a. Of course, the arrangement position of the oxidation catalyst 16 is not limited to this, and may be arranged closer to the start end of the upstream section 13 than the arrangement position.
また、下流区間１５の始端部分には、フィルタ１７が配されており、下流区間１５を通過する排気は、全てフィルタ１７を通過する。フィルタ１７は、第２方向１５ａに沿って配された状態となる。無論、フィルタ１７の配置位置はこれに限らず、該配置位置よりも下流区間１５の終端寄りに配されていても良い。 Further, a filter 17 is disposed at the start end portion of the downstream section 15, and all exhaust gas that passes through the downstream section 15 passes through the filter 17. The filter 17 is arranged along the second direction 15a. Of course, the arrangement position of the filter 17 is not limited to this, and the filter 17 may be arranged closer to the end of the downstream section 15 than the arrangement position.
ここで、上流区間１３と、接続区間１４と、下流区間１５とにより形成されるカーブの内側を内側と、該カーブの外側を外側と記載する。また、フィルタ１７の外面における上流側に面した部分（フィルタ１７を通過する排気が最初に通過する部分）を入口面１７ａとし、該外面における下流側に面した部分（フィルタ１７を通過した排気が外部に出る際に通過する部分）を出口面１７ｂとする。また、入口面１７ａにおける最も内側に位置する部分（換言すれば、上流区間１３が位置する側の端部）を、内側端部１７ｃとする。 Here, the inside of the curve formed by the upstream section 13, the connection section 14, and the downstream section 15 is described as the inside, and the outside of the curve is described as the outside. Further, a portion facing the upstream side on the outer surface of the filter 17 (portion where the exhaust gas passing through the filter 17 first passes) is defined as an inlet surface 17a, and a portion facing the downstream side of the outer surface (the exhaust gas passing through the filter 17 is A portion that passes when going outside is defined as an exit surface 17b. Further, the innermost portion of the entrance surface 17a (in other words, the end portion on the side where the upstream section 13 is located) is referred to as an inner end portion 17c.
フィルタ１７は、内側端部１７ｃを通過し、第２方向１５ａに延びる（下流区間１５の方向に沿った）端部直線１７ｄが、酸化触媒１６の内側の側部１６ｂと交差するように配されている。換言すれば、フィルタ１７は、入口面１７ａの内側部分の正面に、酸化触媒１６の内側の側部１６ｂが位置するように配されている。なお、酸化触媒１６の側部１６ｂとは、酸化触媒１６を通過する排気を側方から覆う部分である。 The filter 17 is arranged so that an end straight line 17 d that passes through the inner end 17 c and extends in the second direction 15 a (along the direction of the downstream section 15) intersects the side 16 b inside the oxidation catalyst 16. ing. In other words, the filter 17 is arranged so that the side portion 16b inside the oxidation catalyst 16 is positioned in front of the inner portion of the inlet surface 17a. The side portion 16b of the oxidation catalyst 16 is a portion that covers the exhaust gas passing through the oxidation catalyst 16 from the side.
また、酸化触媒１６の外面における下流側に面した部分（酸化触媒１６を通過した排気が外部に出る際に通過する部分）を出口面１６ａとする。また、第１方向１３ａと第２方向１５ａに直交する方向を、幅方向とする。 Further, a portion facing the downstream side of the outer surface of the oxidation catalyst 16 (portion through which the exhaust gas that has passed through the oxidation catalyst 16 passes outside) is defined as an outlet surface 16a. Further, a direction orthogonal to the first direction 13a and the second direction 15a is defined as a width direction.
また、接続区間１４を構成する壁面のうちの酸化触媒１６の出口面１６ａに対面する部分を、対面壁部１４ａとする。また、対面壁部１４ａにおける任意の位置を通過し、対面壁部１４ａに直交する直線を基準線１４ａ−１とし、該位置を通過する第１方向１３ａの直線を第１直線、該位置を通過する第２方向１５ａの直線を第２直線とする。さらに、基準線１４ａ−１と第１直線のなす角度を第１角度１３ｂとし、基準線１４ａ−１と第２直線のなす角度を第２角度１５ｂとする。 Moreover, the part which faces the exit surface 16a of the oxidation catalyst 16 among the wall surfaces which comprise the connection area 14 is made into the facing wall part 14a. Further, a straight line passing through an arbitrary position on the facing wall portion 14a, orthogonal to the facing wall portion 14a is defined as a reference line 14a-1, a straight line in the first direction 13a passing through the position is a first straight line, and the position passes through the position. The straight line in the second direction 15a is defined as the second straight line. Further, the angle formed between the reference line 14a-1 and the first straight line is defined as a first angle 13b, and the angle formed between the reference line 14a-1 and the second straight line is defined as a second angle 15b.
対面壁部１４ａは、第１角度１３ｂと第２角度１５ｂが、同一、又は、同程度の大きさとなるように配されていても良い。
また、対面壁部１４ａには、第１突出部１４ｂと第２突出部１４ｃが形成されている（図３，５，７，８）。第１突出部１４ｂと第２突出部１４ｃが接続区間１４の外側における排気の流れに干渉することで、フィルタ１７の入口面１７ａの各部分に衝突する排気の量が均一になるようにしている。換言すれば、該干渉により、入口面１７ａの各部分から、同程度の量の排気がフィルタ１７の内部に進入するようにしている。
The facing wall portion 14a may be arranged such that the first angle 13b and the second angle 15b are the same or approximately the same size.
Moreover, the 1st protrusion part 14b and the 2nd protrusion part 14c are formed in the facing wall part 14a (FIG. 3, 5, 7, 8). The first projecting portion 14b and the second projecting portion 14c interfere with the flow of exhaust gas outside the connection section 14, so that the amount of exhaust gas that collides with each portion of the inlet surface 17a of the filter 17 is made uniform. . In other words, a similar amount of exhaust gas enters the inside of the filter 17 from each part of the inlet surface 17a due to the interference.
具体的には、第１突出部１４ｂは、対面壁部１４ａの幅方向における中央部分に形成されており、排気経路１０の上流側から下流側に沿って伸びる細長い領域であり、排気経路１０の外部に向かって突出する形状となっている。換言すれば、対面壁部１４ａの幅方向における中央部分に位置する、排気経路１０の上流側から下流側に沿って伸びる細長い領域の両側の部分が、排気経路１０の内部に向かって突出する（内側にえぐられた）形状となっている（図５，７，８）。 Specifically, the first projecting portion 14b is formed at a central portion in the width direction of the facing wall portion 14a and is an elongated region extending from the upstream side to the downstream side of the exhaust path 10. It has a shape that protrudes toward the outside. In other words, the portions on both sides of the elongated region that extends from the upstream side to the downstream side of the exhaust path 10 located at the center portion in the width direction of the facing wall portion 14a protrude toward the inside of the exhaust path 10 ( It has a shape that has been crushed inside (FIGS. 5, 7, and 8).
また、第２突出部１４ｃは、対面壁部１４ａの幅方向の中央部分における、第１突出部１４ｂの下流側の端部を含む領域（第１突出部１４ｂの下流側の端部の上流側と下流側に広がる領域）に形成されている。第２突出部１４ｃは、排気経路１０の内部に向かってなだらかに突出する形状となっている。第２突出部１４ｃは、幅方向に沿って当該第２突出部１４ｃを視認すると、円弧状になっている（図５，８）。 The second projecting portion 14c is a region including the downstream end portion of the first projecting portion 14b in the central portion in the width direction of the facing wall portion 14a (upstream side of the downstream end portion of the first projecting portion 14b. And a region extending downstream). The second protruding portion 14 c has a shape that gently protrudes toward the inside of the exhaust path 10. The second protrusion 14c has an arc shape when the second protrusion 14c is visually recognized along the width direction (FIGS. 5 and 8).
無論、第２突出部１４ｃの形状はこれに限定されることは無く、第２突出部１４ｃは、側方から視認した際、楕円形状や多角形状になるように形成されていても良いし、曲線と直線からなる凸状になるように形成されていても良い。 Of course, the shape of the second protrusion 14c is not limited to this, and the second protrusion 14c may be formed in an elliptical shape or a polygonal shape when viewed from the side, You may form so that it may become the convex shape which consists of a curve and a straight line.
また、下流区間１５の終端における最も内側に位置する部分を、内側部分とする。排出口１２は、内側部分における幅方向の端部に配されている。換言すれば、排出口１２は、下流区間１５の終端をなす排気浄化装置１の左下の角部における後側の位置に配されている（図３〜５）。 Further, the innermost portion at the end of the downstream section 15 is defined as an inner portion. The discharge port 12 is arranged at the end in the width direction in the inner portion. In other words, the discharge port 12 is arranged at a rear position in the lower left corner of the exhaust purification device 1 that forms the end of the downstream section 15 (FIGS. 3 to 5).
無論、これに限らず、排出口１２は、下流区間１５の終端における下流区間１５の中央（下流区間１５の終端における第２方向１５ａに直交する断面の中心）と、内側部分との間に形成されていても良い。これ以外にも、排出口１２は、下流区間１５の終端における下流区間１５の中央に形成されていても良いし、該終端における中央よりも外側寄りの位置に形成されていても良い。 Of course, not limited to this, the discharge port 12 is formed between the center of the downstream section 15 at the end of the downstream section 15 (the center of the cross section perpendicular to the second direction 15a at the end of the downstream section 15) and the inner portion. May be. In addition to this, the discharge port 12 may be formed at the center of the downstream section 15 at the end of the downstream section 15, or may be formed at a position closer to the outside than the center at the end.
［作用，効果］
本実施形態の排気浄化装置１によれば、酸化触媒とフィルタとを一直線に並べて配する場合のように、排気浄化装置が細長い形状になってしまうのを回避できる。また、９０°に屈曲する排気経路における屈曲地点の上流側と下流側に、酸化触媒とフィルタを配する場合に比べ、これらをより集約した状態で配することができる。したがって、排気浄化装置１を小型化することができる。
[Action, Effect]
According to the exhaust purification device 1 of the present embodiment, it is possible to avoid the exhaust purification device from having an elongated shape as in the case where the oxidation catalyst and the filter are arranged in a straight line. Further, compared to the case where the oxidation catalyst and the filter are arranged on the upstream side and the downstream side of the bending point in the exhaust path bent at 90 °, these can be arranged in a more aggregated state. Therefore, the exhaust emission control device 1 can be reduced in size.
また、排気経路１０における酸化触媒１６とフィルタ１７とを繋ぐ接続区間１４は、急激なカーブを形成しており、該カーブの外側を通過してフィルタ１７に到達する排気は、内側を通過する排気に比べ、移動距離が大幅に長くなる。つまり、該カーブの外側を通過する排気は、内側を通過する排気に比べ、フィルタ１７への到達時間が長くなる。これにより、フィルタ１７の入口面１７ａの内側部分は、外側部分に比べ、排気が衝突する量が多くなり、入口面１７ａ全体に均一に排気が衝突しなくなるため、フィルタ１７の浄化性能が低下してしまう。 Further, the connection section 14 that connects the oxidation catalyst 16 and the filter 17 in the exhaust path 10 forms a sharp curve, and the exhaust that passes through the outside of the curve and reaches the filter 17 is exhaust that passes through the inside. Compared to, the travel distance is significantly increased. That is, the exhaust gas passing outside the curve has a longer time to reach the filter 17 than the exhaust gas passing through the inside. As a result, the amount of exhaust colliding with the inner portion of the inlet surface 17a of the filter 17 is larger than that of the outer portion, and the exhaust does not collide uniformly with the entire inlet surface 17a. End up.
これに対し、酸化触媒１６に対面して配された（換言すれば、該カーブの外側に沿って配された）対面壁部１４ａには、第１突出部１４ｂが形成されている。このため、該カーブの外側を通過する排気は、第１突出部１４ｂにより形成された空間に進入し、これにより、該排気の流路の断面積が狭められるため、外側を通過する排気の流速が向上する。その結果、外側を通過する排気のフィルタ１７への到達時間と、内側を通過する排気の該到達時間を同程度とすることが可能となり、排気がフィルタ１７の入口面１７ａ全体に均一に衝突するようになるため、フィルタ１７の浄化性能の低下を抑制できる。 On the other hand, the 1st protrusion part 14b is formed in the facing wall part 14a distribute | arranged facing the oxidation catalyst 16 (in other words, it distribute | arranged along the outer side of this curve). For this reason, the exhaust gas passing outside the curve enters the space formed by the first projecting portion 14b, and thereby the cross-sectional area of the exhaust gas flow path is narrowed. Will improve. As a result, it is possible to make the arrival time of the exhaust passing through the outside reach the filter 17 and the arrival time of the exhaust passing through the inside, and the exhaust collides uniformly with the entire inlet surface 17a of the filter 17. As a result, a decrease in the purification performance of the filter 17 can be suppressed.
したがって、排気の浄化性能の低下を抑えつつ、排気浄化装置１を様々な場所に搭載できるようになる。
［他の実施形態］
（１）本実施形態の排気浄化装置１では、フィルタ１７は、内側端部１７ｃを通過し、第２方向１５ａに延びる端部直線１７ｄが、酸化触媒１６の内側の側部１６ｂと交差するように配されている（換言すれば、フィルタ１７は、入口面１７ａの内側部分の正面に、酸化触媒１６の内側の側部１６ｂが位置するように配されている）。
Therefore, the exhaust purification device 1 can be mounted in various places while suppressing a decrease in exhaust purification performance.
[Other Embodiments]
(1) In the exhaust purification device 1 of the present embodiment, the filter 17 passes through the inner end 17c, and the end straight line 17d extending in the second direction 15a intersects the side 16b inside the oxidation catalyst 16. (In other words, the filter 17 is arranged so that the side portion 16b on the inner side of the oxidation catalyst 16 is positioned in front of the inner portion of the inlet surface 17a).
しかしながら、これに限らず、フィルタ１７は、端部直線１７ｄが酸化触媒１６の内側の側部１６ｂと交差しないように（入口面１７ａの内側部分の正面に、酸化触媒１６の内側の側部１６ｂが位置しないように）配されていても良い。 However, the present invention is not limited to this, and the filter 17 is arranged so that the end straight line 17d does not intersect the side part 16b on the inner side of the oxidation catalyst 16 (the side part 16b on the inner side of the oxidation catalyst 16 in front of the inner part of the inlet surface 17a May be arranged so that there is no position.
このような場合であっても、同様の効果を得ることができる。
（２）本実施形態では、本発明を、車両３に搭載されたディーゼルエンジン２からの排気を浄化する排気浄化装置１に適用した場合を例示した。しかしながら、これに限らず、本発明は、ガソリンエンジン等といった様々なエンジンからの排気を浄化する排気浄化装置に適用することができる。
Even in such a case, the same effect can be obtained.
(2) In the present embodiment, the case where the present invention is applied to the exhaust purification device 1 that purifies exhaust from the diesel engine 2 mounted on the vehicle 3 is illustrated. However, the present invention is not limited to this, and the present invention can be applied to an exhaust purification device that purifies exhaust from various engines such as a gasoline engine.
また、本実施形態では、排気浄化装置１の排気経路１０の上流側に酸化触媒１６が、下流側にフィルタ１７が配されている。しかしながら、これに限らず、排気経路１０の上流側の位置（酸化触媒１６が配される位置）と下流側の位置（フィルタ１７が配される位置）の双方に、酸化触媒を配置しても良い。また、上流側の位置に、酸化触媒１６以外の排気を浄化するための部品を配し、下流側の位置に、フィルタ１７以外の排気を浄化するための部品を配しても良い。 Further, in the present embodiment, the oxidation catalyst 16 is disposed on the upstream side of the exhaust path 10 of the exhaust purification device 1 and the filter 17 is disposed on the downstream side. However, the present invention is not limited to this, and an oxidation catalyst may be disposed at both the upstream position (position where the oxidation catalyst 16 is disposed) and the downstream position (position where the filter 17 is disposed) of the exhaust path 10. good. Further, a part for purifying the exhaust gas other than the oxidation catalyst 16 may be arranged at the upstream side position, and a part for purifying the exhaust gas other than the filter 17 may be arranged at the downstream side position.
このような場合であっても、同様の効果を得ることができる。
（３）なお、上記実施形態の構成の一部を省略した態様も本発明の実施形態である。また、上記実施形態と変形例とを適宜組み合わせて構成される態様も本発明の実施形態である。また、特許請求の範囲に記載した文言によって特定される発明の本質を逸脱しない限度において考え得るあらゆる態様も本発明の実施形態である。
Even in such a case, the same effect can be obtained.
(3) In addition, the aspect which abbreviate | omitted a part of structure of the said embodiment is also embodiment of this invention. Further, an aspect configured by appropriately combining the above embodiment and the modification is also an embodiment of the present invention. Moreover, all the aspects which can be considered in the limit which does not deviate from the essence of the invention specified by the wording described in the claims are the embodiments of the present invention.
［特許請求の範囲との対応］
上記実施形態の説明で用いた用語と、特許請求の範囲の記載に用いた用語との対応を示す。
[Correspondence with Claims]
The correspondence between the terms used in the description of the above embodiment and the terms used in the description of the claims is shown.
酸化触媒１６が上流側浄化部の一例に、フィルタ１７が下流側浄化部の一例に相当する。 The oxidation catalyst 16 corresponds to an example of an upstream purification unit, and the filter 17 corresponds to an example of a downstream purification unit.
１…排気浄化装置、２…ディーゼルエンジン、３…車両、１０…排気経路、１１…入口、１２…排出口、１３…上流区間、１４…接続区間、１４ａ…対面壁部、１４ｂ…第１突出部、１４ｃ…第２突出部、１５…下流区間、１６…酸化触媒、１７…フィルタ。 DESCRIPTION OF SYMBOLS 1 ... Exhaust gas purification device, 2 ... Diesel engine, 3 ... Vehicle, 10 ... Exhaust path, 11 ... Inlet, 12 ... Discharge port, 13 ... Upstream section, 14 ... Connection section, 14a ... Face-to-face wall part, 14b ... First protrusion Part, 14c ... 2nd protrusion part, 15 ... downstream area, 16 ... oxidation catalyst, 17 ... filter.
Claims (4)
前記上流区間に配され、当該部位を通過する前記排気を浄化するための処置を施す上流側浄化部と、
前記下流区間に配され、当該部位を通過する前記排気を浄化するための処置を施す下流側浄化部と、を備え、
前記上流区間の方向と前記下流区間の方向とに直交する方向を、幅方向とし、
前記接続区間には、前記上流側浄化部に対面する対面壁部が形成されており、
前記対面壁部における前記幅方向の中央部分には、前記排気経路の上流側から下流側に向かって伸びる細長い領域であり、前記排気経路の外部に向かって突出した形状となっている第１突出部が形成されていること、
を特徴とする排気浄化装置。 A tubular member through which exhaust from the engine passes, and has an upstream section, a downstream section located on the downstream side of the upstream section, and a connection section connecting the end of the upstream section and the start end of the downstream section. And an exhaust path bent at an acute angle in the connection section;
An upstream side purification unit that is disposed in the upstream section and performs a treatment for purifying the exhaust gas passing through the part;
A downstream purification unit that is disposed in the downstream section and performs a treatment for purifying the exhaust gas passing through the part;
The direction orthogonal to the direction of the upstream section and the direction of the downstream section is the width direction,
In the connection section, a facing wall portion facing the upstream purification portion is formed,
A central portion of the facing wall portion in the width direction is an elongated region extending from the upstream side to the downstream side of the exhaust path and has a shape protruding toward the outside of the exhaust path. Part is formed,
An exhaust purification device characterized by the above.
前記下流区間において前記上流区間が位置する側を、内側とし、
前記下流側浄化部における前記排気経路の上流側に面した部分における、最も前記内側寄りの位置を、内側端部とし、
前記上流側浄化部における、当該部位を通過する前記排気を側方から覆う部分を、側部とし、
前記下流側浄化部は、前記内側端部を通過して前記下流区間に沿って伸びる端部直線が、前記上流側浄化部の前記側部と交差するように配置されていること、
を特徴とする排気浄化装置。 The exhaust emission control device according to claim 1,
The side where the upstream section is located in the downstream section is the inside,
In the portion facing the upstream side of the exhaust path in the downstream purification section, the position closest to the inside is the inner end,
In the upstream purification section, a portion that covers the exhaust gas passing through the part from the side is a side portion,
The downstream purification section is disposed so that an end straight line that passes through the inner end section and extends along the downstream section intersects the side section of the upstream purification section,
An exhaust purification device characterized by the above.
前記対面壁部における前記幅方向の中央部分には、前記第１突出部の下流側の端部を含む領域に位置し、前記排気経路の内部に向かって突出した形状となっている第２突出部が形成されていること、
を特徴とする排気浄化装置。 The exhaust emission control device according to claim 1 or 2,
A second protrusion which is located in a region including the downstream end of the first protrusion and protrudes toward the inside of the exhaust path at the widthwise central portion of the facing wall portion. Part is formed,
An exhaust purification device characterized by the above.
前記下流側浄化部における、当該部位を通過した前記排気が外部に出る際に通過する部分を出口面とし、
前記下流区間には、終端における前記上流区間が位置する側に寄った位置に、前記排気を当該排気浄化装置の外部に排出する排出口が形成されていること、
を特徴とする排気浄化装置。 The exhaust emission control device according to any one of claims 1 to 3,
In the downstream purification section, a portion that passes when the exhaust gas that has passed through the portion exits to the outside is an exit surface,
In the downstream section, a discharge port for discharging the exhaust to the outside of the exhaust purification device is formed at a position close to the side where the upstream section is located at the end,
An exhaust purification device characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109790771A (en) * | 2016-12-16 | 2019-05-21 | 马自达汽车株式会社 | The exhaust apparatus of engine |
| CN110088442A (en) * | 2016-12-16 | 2019-08-02 | 马自达汽车株式会社 | The exhaust apparatus of engine |
| EP3550116A4 (en) * | 2016-12-16 | 2019-10-23 | Mazda Motor Corporation | Engine exhaust device |
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| WO2013069115A1 (en) * | 2011-11-09 | 2013-05-16 | トヨタ自動車株式会社 | Exhaust purificaion device for internal combustion engine |
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| JP2012529592A (en) * | 2009-06-12 | 2012-11-22 | 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 | Exhaust gas treatment device for use in close proximity to the engine |
| JP2011117409A (en) * | 2009-12-07 | 2011-06-16 | Ngk Insulators Ltd | Exhaust gas treatment device |
| JP2011241705A (en) * | 2010-05-17 | 2011-12-01 | Toyota Industries Corp | Exhaust gas cleaning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109790771A (en) * | 2016-12-16 | 2019-05-21 | 马自达汽车株式会社 | The exhaust apparatus of engine |
| EP3505732A4 (en) * | 2016-12-16 | 2019-07-03 | Mazda Motor Corporation | Engine exhaust device |
| CN110088442A (en) * | 2016-12-16 | 2019-08-02 | 马自达汽车株式会社 | The exhaust apparatus of engine |
| EP3550116A4 (en) * | 2016-12-16 | 2019-10-23 | Mazda Motor Corporation | Engine exhaust device |
| EP3543496A4 (en) * | 2016-12-16 | 2019-10-23 | Mazda Motor Corporation | Engine exhaust device |
| US10662853B2 (en) | 2016-12-16 | 2020-05-26 | Mazda Motor Corporation | Engine exhaust device |
| US10835865B2 (en) | 2016-12-16 | 2020-11-17 | Mazda Motor Corporation | Engine exhaust device |
| CN110088442B (en) * | 2016-12-16 | 2021-04-27 | 马自达汽车株式会社 | Exhaust device of engine |
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| JP6420158B2 (en) | 2018-11-07 |
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