JP6079531B2 - Engine exhaust system - Google Patents

Engine exhaust system Download PDF

Info

Publication number
JP6079531B2
JP6079531B2 JP2013195667A JP2013195667A JP6079531B2 JP 6079531 B2 JP6079531 B2 JP 6079531B2 JP 2013195667 A JP2013195667 A JP 2013195667A JP 2013195667 A JP2013195667 A JP 2013195667A JP 6079531 B2 JP6079531 B2 JP 6079531B2
Authority
JP
Japan
Prior art keywords
exhaust gas
particulate matter
filter
egr
engine
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.)
Active
Application number
JP2013195667A
Other languages
Japanese (ja)
Other versions
JP2015059559A (en
Inventor
寿章 加茂
寿章 加茂
良治 草開
良治 草開
石田　卓也
卓也 石田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP2013195667A priority Critical patent/JP6079531B2/en
Publication of JP2015059559A publication Critical patent/JP2015059559A/en
Application granted granted Critical
Publication of JP6079531B2 publication Critical patent/JP6079531B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • 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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/02—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
    • 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)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Description

本発明はエンジンの排気装置に関する。   The present invention relates to an exhaust system for an engine.

エンジンの排気通路に排気ガス中の粒子状物質を捕集するフィルタを有する粒子状物質処理装置を配置し、この粒子状物質処理装置の下流側から排気ガスをエンジンの吸気系に還流させるようにしたＥＧＲ装置は一般に知られている。例えば、特許文献１には、上記粒子状物質処理装置としてのＤＰＦ（ディーゼルパティキュレートフィルタ）の上方にＥＧＲクーラを配置し、ＤＰＦの下流側からＥＧＲクーラを通して排気ガスを吸気系に還流させること、並びにＥＧＲクーラの下流側にＥＧＲバルブを設けることが記載されている。   A particulate matter treatment device having a filter that collects particulate matter in the exhaust gas is disposed in the exhaust passage of the engine, and exhaust gas is recirculated from the downstream side of the particulate matter treatment device to the intake system of the engine. Such EGR devices are generally known. For example, in Patent Document 1, an EGR cooler is disposed above a DPF (diesel particulate filter) as the particulate matter processing apparatus, and exhaust gas is recirculated from the downstream side of the DPF to the intake system through the EGR cooler. In addition, it is described that an EGR valve is provided on the downstream side of the EGR cooler.

特開２０１２−１４９５５８号公報JP 2012-149558 A

自動車のエンジンルームには、ラジエータ、バッテリ、オルタネータ、過給機を含む各種の吸排気系部品など多くの補機類の他、ブレーキブースターやエンジン制御ユニット等を収容しなければならず、クラッシャブルゾーンの確保も求められる。そのため、エンジン本体周辺のスペースが狭くなる傾向があり、補機類等をコンパクトにまとめて配置する高度な設計思想が求められる。特に、吸排気系部品としては、触媒コンバータや上述の粒子状物質処理装置（ＤＰＦ）以外にも、ＥＧＲクーラなどＥＧＲ用の各部品が必要となる場合があり、これらの部品も含めて吸排気系部品をエンジン本体まわりにどのように配置するかが問題になる。   The engine room of the car must accommodate a variety of intake and exhaust systems including radiators, batteries, alternators, turbochargers, as well as brake boosters and engine control units. Securing zones is also required. Therefore, the space around the engine body tends to be narrowed, and an advanced design philosophy that arranges auxiliary machinery and the like in a compact manner is required. In particular, as intake / exhaust system parts, there are cases where each part for EGR such as EGR cooler is required in addition to the catalytic converter and the above-mentioned particulate matter processing device (DPF). The problem is how to arrange the system parts around the engine body.

本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、吸排気系部品をエンジン本体まわりに効率的且つコンパクトに配置できるようにすることにある。  The present invention has been made in view of this point, and an object of the present invention is to enable efficient and compact arrangement of intake and exhaust system parts around the engine body.

本発明は、上記課題を解決するために、粒子状物質処理装置におけるフィルタの下流側の端面を覆うカバーにＥＧＲ用排気ガスの取出口をフィルタ軸心に対して偏心させて設けることにより、ＥＧＲクーラを粒子状物質処理装置の端面に沿って配置するようにした。以下、具体的に説明する。   In order to solve the above-mentioned problems, the present invention provides an EGR exhaust gas outlet that is eccentric to the filter axis in a cover that covers the downstream end face of the filter in the particulate matter processing apparatus. The cooler was arranged along the end face of the particulate matter processing apparatus. This will be specifically described below.

ここに提示するエンジンの排気装置は、エンジンの排気ガス中の粒子状物質を捕集するフィルタを有する粒子状物質処理装置と、ＥＧＲ用の排気ガスを冷却するＥＧＲクーラとを備え、
上記粒子状物質処理装置は、上記フィルタの下流側の端面を覆う下流側カバーを備え、
上記下流側カバーに、排気ガスをテールパイプに導く排気ガス排出口と排気ガスを上記ＥＧＲクーラに導くＥＧＲ用の排気ガス取出口が開口しており、
上記ＥＧＲ用の排気ガス取出口が上記下流側カバーの上記フィルタの軸心からオフセットした位置に配置され、
上記ＥＧＲクーラが、上記排気ガス取出口に接続されて、上記粒子状物質処理装置の下流側カバーに沿うように、上記フィルタの軸心を挟んで上記排気ガス取出口の反対側へ延びていることを特徴とする。 The engine exhaust device presented here includes a particulate matter treatment device having a filter that collects particulate matter in the exhaust gas of the engine, and an EGR cooler that cools the exhaust gas for EGR,
The particulate matter treatment device includes a downstream cover that covers an end face on the downstream side of the filter,
An exhaust gas exhaust port for leading exhaust gas to the tail pipe and an exhaust gas outlet for EGR leading the exhaust gas to the EGR cooler are opened in the downstream cover,
The exhaust gas outlet for EGR is disposed at a position offset from the filter shaft center of the downstream cover,
The EGR cooler is connected to the exhaust gas outlet and extends to the opposite side of the exhaust gas outlet across the filter shaft so as to follow the downstream cover of the particulate matter processing device. It is characterized by that.

この排気装置によれば、ＥＧＲ用の排気ガス取出口をフィルタの軸心に対してオフセット（偏倚）させてＥＧＲクーラを粒子状物質処理装置の下流側の端面に沿わせるようにしたから、ＥＧＲクーラを粒子状物質処理装置からその軸心方向および径方向に大きく突出させずとも、必要なクーラ容量を確保することができる。このようにＥＧＲクーラと粒子状物質処理装置を該粒子状物質処理装置の軸心方向において互いに接近させて言わば一体的にまとめることができるため、これらをエンジン本体まわりの限られたスペースに配置することが容易になる。   According to this exhaust device, the exhaust gas outlet for EGR is offset (biased) with respect to the filter shaft center so that the EGR cooler follows the downstream end face of the particulate matter processing device. The required cooler capacity can be ensured without projecting the cooler from the particulate matter processing apparatus in the axial direction and the radial direction. In this way, the EGR cooler and the particulate matter treatment device can be integrated together by bringing them close to each other in the axial direction of the particulate matter treatment device, so they are arranged in a limited space around the engine body. It becomes easy.

本発明の好ましい態様では、上記粒子状物質処理装置は上記フィルタの軸心が略水平にされ、上記ＥＧＲクーラにＥＧＲ量を制御するＥＧＲバルブが接続され、上記粒子状物質処理装置、ＥＧＲクーラおよびＥＧＲバルブがエンジン本体の側面に沿って該エンジン本体の長手方向に配列されている。   In a preferred aspect of the present invention, in the particulate matter processing device, the axis of the filter is substantially horizontal, an EGR valve that controls the amount of EGR is connected to the EGR cooler, the particulate matter processing device, the EGR cooler, and The EGR valves are arranged in the longitudinal direction of the engine body along the side surface of the engine body.

これにより、粒子状物質処理装置、ＥＧＲクーラおよびＥＧＲバルブをエンジン本体の側面にコンパクトにまとめることができ、これら吸排気系部品をエンジン本体まわりの限られたスペースに配置することが容易になる。   Thereby, the particulate matter processing device, the EGR cooler, and the EGR valve can be compactly assembled on the side surface of the engine body, and it becomes easy to arrange these intake and exhaust system parts in a limited space around the engine body.

本発明の好ましい態様では、上記下流側カバーの排気ガス排出口は、上記テールパイプに向かう排気ガスが上記フィルタの軸心を挟んで上記ＥＧＲ用排気ガス取出口の反対側に流れるように設けられている。   In a preferred aspect of the present invention, the exhaust gas discharge port of the downstream cover is provided so that the exhaust gas toward the tail pipe flows to the opposite side of the exhaust gas outlet for EGR across the shaft center of the filter. ing.

この態様によれば、ＥＧＲ中は、粒子状物質処理装置に流入した排気ガスがテールパイプに向かう流れとＥＧＲクーラに向かう流れとに分かれることにより、排気ガスがフィルタを通過し易くなり、エンジンの背圧低減に有利になる。また、排気ガスが二手に分かれることにより、排気ガス中の粒子状物質がフィルタの下流側で分散されやすくなり、粒子状物質をフィルタ全体に均一に堆積させていく上で、つまり、局部的な目詰まり防止に有利になる。   According to this aspect, during EGR, the exhaust gas flowing into the particulate matter processing device is divided into a flow toward the tail pipe and a flow toward the EGR cooler, so that the exhaust gas easily passes through the filter, and the engine This is advantageous for reducing back pressure. In addition, the exhaust gas is divided into two, so that the particulate matter in the exhaust gas is easily dispersed on the downstream side of the filter, so that the particulate matter is uniformly deposited on the entire filter, that is, locally. This is advantageous for preventing clogging.

また、排気ガスがテールパイプに向かう流れとＥＧＲクーラに向かう流れに分かれる態様において、好ましいのは、上記粒子状物質処理装置の上方に触媒コンバータが配置され、上記粒子状物質処理装置と上記触媒コンバータとが、該触媒コンバータから排気ガスを上記粒子状物質処理装置に導く湾曲した連結管によって接続され、上記連結管の湾曲した管路の中心よりも該管路の外周側を流れる排気ガスが上記フィルタの上流端の中心に向かうように、上記管路の中心線を上記フィルタの上流端に向かって延ばした延長線が上記フィルタの軸心に対して上方にオフセットしていることである。   In an aspect in which the exhaust gas is divided into a flow toward the tail pipe and a flow toward the EGR cooler, it is preferable that a catalytic converter is disposed above the particulate matter processing device, and the particulate matter processing device and the catalytic converter are arranged. Are connected by a curved connecting pipe that guides exhaust gas from the catalytic converter to the particulate matter processing device, and the exhaust gas flowing on the outer peripheral side of the pipe line from the center of the curved pipe line of the connecting pipe is An extension line extending the center line of the pipe line toward the upstream end of the filter so as to go to the center of the upstream end of the filter is offset upward with respect to the axial center of the filter.

排気ガスが連結管の湾曲した管路を通るとき、質量が大きな粒子状物質は遠心力によって該管路の外周側に寄せられる。従って、上記態様によれば、排気ガス中の粒子状物質は、フィルタの上流端の中心に向かうことになり、この中心付近からテールパイプに向かう排気ガス流れとＥＧＲクーラに向かう排気ガス流れに乗ってフィルタ全体に分散していくことになる。よって、粒子状物質をフィルタの主として中央部に堆積させ、そして、この中央部からそのまわりに分散させて堆積させていくことができ、局部的な目詰まり防止に有利になる。   When the exhaust gas passes through the curved pipe line of the connecting pipe, the particulate matter having a large mass is drawn to the outer peripheral side of the pipe line by centrifugal force. Therefore, according to the above aspect, the particulate matter in the exhaust gas travels toward the center of the upstream end of the filter, and rides on the exhaust gas flow toward the tail pipe from the vicinity of the center and the exhaust gas flow toward the EGR cooler. Will be distributed throughout the filter. Therefore, the particulate matter can be deposited mainly in the central portion of the filter, and can be dispersed and deposited around the central portion, which is advantageous in preventing local clogging.

また、フィルタの中央部は、フィルタを再生（粒子状物質を燃焼除去）すべく、排気ガス温度を上昇させたときに、周囲から熱を奪われる周辺部に比べて温度が上昇し易い。従って、上述の如く粒子状物質がフィルタの中央部に堆積し易いということは、フィルタの再生時に粒子状物質を燃焼除去し易いということであり、粒子状物質の燃え残りを抑えることができ、そのため、再生頻度を少なくすることができ、また、再生時の熱暴走防止にも有利になる。   In addition, when the exhaust gas temperature is raised to regenerate the filter (burn away particulate matter), the central part of the filter is likely to rise in temperature compared to the peripheral part where heat is taken away from the surroundings. Therefore, as described above, the fact that the particulate matter is easily deposited in the center of the filter means that the particulate matter is easily burned and removed at the time of regeneration of the filter, and the unburned residue of the particulate matter can be suppressed. Therefore, the frequency of regeneration can be reduced, and it is advantageous for preventing thermal runaway during regeneration.

本発明によれば、ＥＧＲ用の排気ガス取出口をフィルタの軸心に対してオフセットさせてＥＧＲクーラを粒子状物質処理装置の下流側の端面に沿わせるようにしたから、ＥＧＲクーラの容量を確保しつつ、ＥＧＲクーラと粒子状物質処理装置を該粒子状物質処理装置の軸心方向において互いに接近させて言わば一体的にまとめることができ、これらをエンジン本体まわりの限られたスペースに配置することが容易になる。   According to the present invention, since the exhaust gas outlet for EGR is offset with respect to the filter shaft center so that the EGR cooler follows the downstream end face of the particulate matter processing device, the capacity of the EGR cooler is increased. While securing, the EGR cooler and the particulate matter processing device can be integrated together by approaching each other in the axial direction of the particulate matter processing device, and these are arranged in a limited space around the engine body. It becomes easy.

エンジンの排気装置を示す斜視図である。It is a perspective view which shows the exhaust apparatus of an engine. 同排気装置を一部縦断面で示す側面図である。It is a side view which shows the exhaust apparatus partially in a longitudinal section. 図２のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 粒子状物質処理装置、ＥＧＲクーラ及びＥＧＲバルブを示す分解斜視図である。It is a disassembled perspective view which shows a particulate matter processing apparatus, an EGR cooler, and an EGR valve. 粒子状物質処理装置およびＥＧＲクーラを示す水平断面図である。It is a horizontal sectional view showing a particulate matter processing device and an EGR cooler. 粒子状物質処理装置の正面図である。It is a front view of a particulate matter processing device. 粒子状物質処理装置、ＥＧＲクーラ及びＥＧＲバルブを示す平面図である。It is a top view which shows a particulate matter processing apparatus, an EGR cooler, and an EGR valve.

以下、本発明を実施するための形態を図面に基づいて説明する。以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its application, or its use.

図１において、１は自動車のエンジンルームに設けられるディーゼルエンジンのエンジン本体である。本実施形態ではエンジン本体１はクランクシャフトが車幅方向に延びる横置きにされ、エンジン本体１の側面（この場合は背面）に排気ターボ過給機２、触媒コンバータ３、粒子状物質処理装置４、ＥＧＲクーラー５およびＥＧＲバルブ６が配置されている。   In FIG. 1, reference numeral 1 denotes an engine body of a diesel engine provided in an engine room of an automobile. In the present embodiment, the engine body 1 is placed horizontally with the crankshaft extending in the vehicle width direction, and the exhaust turbocharger 2, the catalytic converter 3, and the particulate matter processing device 4 are disposed on the side surface (in this case, the back surface) of the engine body 1. The EGR cooler 5 and the EGR valve 6 are arranged.

本例の触媒コンバータ３は排気ガス中のＨＣおよびＣＯを酸化浄化する酸化触媒である。粒子状物質処理装置４は、排気ガス中の粒子状物質を捕集して燃焼除去する所謂ＤＰＦである。ＥＧＲクーラー５は吸気系に還流させる排気ガスを冷却する。ＥＧＲバルブ６は吸気系へのＥＧＲ量（排気ガス還流量）を調節する。   The catalytic converter 3 of this example is an oxidation catalyst that oxidizes and purifies HC and CO in the exhaust gas. The particulate matter processing device 4 is a so-called DPF that collects particulate matter in the exhaust gas and burns and removes it. The EGR cooler 5 cools the exhaust gas recirculated to the intake system. The EGR valve 6 adjusts the EGR amount (exhaust gas recirculation amount) to the intake system.

ターボ過給機２および触媒コンバータ３は、各々の軸心が略水平にされ、すなわち軸心が横にされ、エンジン本体１の上部の側面に沿ってエンジン本体１の長手方向（車幅方向）に連ねて配置されている。粒子状物質処理装置４は、触媒コンバータ３の下側において該触媒コンバータ３の下面およびエンジン本体１の側面に沿うように軸心が略水平にされて配置されている。触媒コンバータ３は粒子状物質処理装置４に湾曲した連結管７によって連結されている。   Each of the turbocharger 2 and the catalytic converter 3 has an axial center that is substantially horizontal, that is, the axial center is horizontal, and the longitudinal direction (vehicle width direction) of the engine body 1 along the upper side surface of the engine body 1. It is arranged in a row. The particulate matter treatment device 4 is arranged on the lower side of the catalytic converter 3 so that the axis is substantially horizontal along the lower surface of the catalytic converter 3 and the side surface of the engine body 1. The catalytic converter 3 is connected to the particulate matter processing device 4 by a curved connecting pipe 7.

このような触媒コンバータ３および粒子状物質処理装置４のレイアウトによれば、触媒コンバータ３および粒子状物質処理装置４をエンジン本体１の側面にコンパクトにまとめて配置することができる。しかも、エンジン本体１、触媒コンバータ３および粒子状物質処理装置４の三者が互いの放熱を妨げる関係になり、熱損失の低減に有利になる。   According to such a layout of the catalytic converter 3 and the particulate matter processing device 4, the catalytic converter 3 and the particulate matter processing device 4 can be compactly arranged on the side surface of the engine body 1. In addition, the engine body 1, the catalytic converter 3, and the particulate matter processing device 4 are in a relationship that obstructs heat dissipation from each other, which is advantageous in reducing heat loss.

粒子状物質処理装置４には車室床下に配置されるフレキシブルチューブ８を介して自動車後方に延びる排気管９が接続されている。図示は省略しているが、排気管９は排気サイレンサを介してテールパイプに続いている。図１において、２６は粒子状物質処理装置４の入口ガス温度を検出する温度センサ、２７は粒子状物質処理装置４の入口側のガス圧を検出する圧力センサ（図示せず）の圧力取出し部である。   An exhaust pipe 9 extending to the rear of the automobile is connected to the particulate matter processing device 4 via a flexible tube 8 disposed under the passenger compartment floor. Although not shown, the exhaust pipe 9 continues to the tail pipe via an exhaust silencer. In FIG. 1, reference numeral 26 denotes a temperature sensor that detects the inlet gas temperature of the particulate matter processing apparatus 4, and 27 denotes a pressure extraction unit of a pressure sensor (not shown) that detects the gas pressure on the inlet side of the particulate matter processing apparatus 4. It is.

図２に示すように、触媒コンバータ３は、ケース１１にモノリス触媒１２を略水平にした状態で収容してなる。ケース１１は、モノリス触媒１２を収容するケース本体１１ａと、モノリス触媒１２の上流側の端面を覆うコーン状の上流側カバー１１ｂと、モノリス触媒１２の下流側の端面を覆うコーン状の下流側カバー１１ｃとを備えてなる。上流側カバー１１ｂには、モノリス触媒１２の上流側の端面に相対し、排気ガスをモノリス触媒１２に向かって略水平に（横方向に）流入させる流入口部１３が設けられている。また、下流側カバー１１ｃには、モノリス触媒１２を挟んで流入口部１３に相対し（モノリス触媒１２の下流側の端面に相対し）、モノリス触媒１２の下流側から排気ガスを略水平に（横方向に）流出させる流出口部１４が設けられている。   As shown in FIG. 2, the catalytic converter 3 is configured such that the monolith catalyst 12 is accommodated in a case 11 in a substantially horizontal state. The case 11 includes a case main body 11 a that houses the monolith catalyst 12, a cone-shaped upstream cover 11 b that covers the upstream end surface of the monolith catalyst 12, and a cone-shaped downstream cover that covers the downstream end surface of the monolith catalyst 12. 11c. The upstream cover 11 b is provided with an inflow port portion 13 that faces the upstream end face of the monolith catalyst 12 and allows the exhaust gas to flow substantially horizontally (laterally) toward the monolith catalyst 12. Further, the downstream cover 11c is opposed to the inlet portion 13 with the monolith catalyst 12 interposed therebetween (opposed to the downstream end face of the monolith catalyst 12), and the exhaust gas is substantially horizontally (from the downstream side of the monolith catalyst 12) ( An outlet 14 is provided for outflow (in the lateral direction).

ケース１１の流入口部１３には、排気ターボ過給機２のタービンハウジング１５の排気ガス出口部１６が直結されている。ケース１１の流出口部１４には、連結管７の上流端が結合している。また、上流側カバー１１ｂの流入口部１３からケース本体１１ａに至るコーン壁部の上半周側に触媒コンバータ３の入口ガス温度を検出する温度センサ１７が取付けられている。   An exhaust gas outlet portion 16 of the turbine housing 15 of the exhaust turbocharger 2 is directly connected to the inlet portion 13 of the case 11. The upstream end of the connecting pipe 7 is coupled to the outlet portion 14 of the case 11. A temperature sensor 17 for detecting the inlet gas temperature of the catalytic converter 3 is attached to the upper half side of the cone wall portion extending from the inlet portion 13 of the upstream cover 11b to the case body 11a.

粒子状物質処理装置４は、ケース１８に排気ガス中の粒子状物質を捕集するモノリスフィルタ１９を収容してなる。フィルタ１９には、該フィルタ１９に堆積した粒子状物質を燃焼除去するための触媒がコーティングされている。ケース１８は、フィルタ１９を収容するケース本体１８ａと、フィルタ１９の上流側の端面を覆う上流側カバー１８ｂと、フィルタ１９の下流側の端面を覆う下流側カバー１８ｃとを備えてなる。上流側カバー１８ｂに連結管７の下流端が結合している。   The particulate matter processing apparatus 4 is configured by housing a monolith filter 19 for collecting particulate matter in exhaust gas in a case 18. The filter 19 is coated with a catalyst for burning off particulate matter deposited on the filter 19. The case 18 includes a case main body 18 a that houses the filter 19, an upstream cover 18 b that covers the upstream end face of the filter 19, and a downstream cover 18 c that covers the downstream end face of the filter 19. The downstream end of the connecting pipe 7 is coupled to the upstream cover 18b.

連結管７は、その湾曲した管路の中心線ＣＬをフィルタ１９の上流端に向かって延ばした延長線ＥＬがフィルタ１９の軸心Ｃｆに対して上方にオフセット（偏倚）している。これにより、管路の下流部において該管路の中心線ＣＬよりも該管路の外周側を流れる排気ガスがフィルタ１９の上流端の中心に向かうようにしている。図３に示すように、連結管７の湾曲した管路には、その最外周部を管路長手方向に延びる粒子状物質の誘導溝２０が形成されている。本例の場合、誘導溝２０がフィルタ１９の上流端の中心付近に向かって延びている。   In the connecting pipe 7, an extension line EL obtained by extending the center line CL of the curved pipe line toward the upstream end of the filter 19 is offset (biased) upward with respect to the axis Cf of the filter 19. As a result, the exhaust gas flowing on the outer peripheral side of the pipe line from the center line CL of the pipe line in the downstream portion of the pipe line is directed toward the center of the upstream end of the filter 19. As shown in FIG. 3, the curved pipe line of the connecting pipe 7 is formed with a particulate material guide groove 20 extending in the pipe longitudinal direction at the outermost peripheral part thereof. In the case of this example, the guide groove 20 extends toward the vicinity of the center of the upstream end of the filter 19.

ここに、触媒コンバータ３から流出する排気ガス中の粒子状物質（煤）には、連結管７の湾曲した管路を通過するときに、ガスと比較して、質量が大きいことから大きな遠心力が働く。そのため、粒子状物質は、図２に矢符で示すように、湾曲した管路の外周側の壁面に沿って流れ、誘導溝２０の方へ寄せられた状態でフィルタ１９の軸心Ｃｆ付近に流入する。その結果、粒子状物質は、図２に破線で示すように、フィルタ１９の主として中央部に堆積していくことになる。そうして、この中央部は、フィルタ１９を再生（触媒を利用する粒子状物質の燃焼除去）すべく、排気ガス温度を上昇させたときに、周囲から熱を奪われる周辺部に比べて温度が上昇し易い。   Here, the particulate matter (soot) in the exhaust gas flowing out from the catalytic converter 3 has a large centrifugal force because it has a larger mass than the gas when passing through the curved pipe line of the connecting pipe 7. Work. Therefore, as indicated by arrows in FIG. 2, the particulate matter flows along the wall surface on the outer peripheral side of the curved pipe line and is moved toward the guide groove 20 in the vicinity of the axis Cf of the filter 19. Inflow. As a result, the particulate matter is deposited mainly in the center of the filter 19 as indicated by a broken line in FIG. Thus, this central portion has a temperature higher than that of the peripheral portion where heat is taken away from the surroundings when the exhaust gas temperature is increased in order to regenerate the filter 19 (combustion removal of particulate matter using a catalyst). Tends to rise.

従って、フィルタ１９の中央部に粒子状物質が堆積し易い上述の構造によれば、フィルタ１９の再生において、粒子状物質の燃え残りを抑えることができ、そのため、再生頻度を少なくすることができ、また、再生時の熱暴走防止にも有利になる。   Therefore, according to the above-described structure in which particulate matter is likely to accumulate in the central portion of the filter 19, in the regeneration of the filter 19, unburned particulate matter can be suppressed, and therefore the regeneration frequency can be reduced. Also, it is advantageous for preventing thermal runaway during reproduction.

図４に示すように、粒子状物質処理装置４の下流側カバー１８ｃは、扁平になっていて、粒子状物質処理装置４の後方に向かって突出しており、その先端に排気ガスをテールパイプに導く図２に示す排気ガス排出口２１が開口している。そして、下流側カバー１８ｃにおけるフィルタ１９の軸心Ｃｆから前方（該軸心Ｃｆを挟んで排気ガス排出口２１の反対側）にオフセットした位置に、排気ガスをＥＧＲクーラ５に導くＥＧＲ用の排気ガス取出口２２が開口している。   As shown in FIG. 4, the downstream cover 18 c of the particulate matter treatment device 4 is flat and protrudes toward the rear of the particulate matter treatment device 4. The exhaust gas discharge port 21 shown in FIG. 2 is opened. The exhaust gas for EGR that guides the exhaust gas to the EGR cooler 5 at a position offset forward from the axial center Cf of the filter 19 in the downstream cover 18c (opposite the exhaust gas discharge port 21 across the axial center Cf). A gas outlet 22 is open.

図５に示すように、フィルタ１９の軸心Ｃｆに対する排気ガス取出口２２の中心Ｃｅのオフセット量Ｄはフィルタ１９の半径の１／３以上であることが好ましい。また、排気ガス取出口２２は、フィルタ１９の軸心Ｃｆを通る垂直線Ｖよりも前方において開口するようにオフセットしていることが好ましい。図６において、３１は粒子状物質処理装置４の排気ガス入口、３２は温度センサ取付孔、３３は圧力センサの圧力取出し孔である。   As shown in FIG. 5, the offset amount D of the center Ce of the exhaust gas outlet 22 with respect to the axis Cf of the filter 19 is preferably 1/3 or more of the radius of the filter 19. Further, the exhaust gas outlet 22 is preferably offset so as to open ahead of the vertical line V passing through the axis Cf of the filter 19. In FIG. 6, 31 is an exhaust gas inlet of the particulate matter processing apparatus 4, 32 is a temperature sensor mounting hole, and 33 is a pressure extraction hole of the pressure sensor.

ＥＧＲクーラ５は、一連に接続したＥＧＲ用のガス導入部５ａ、クーラ本体部５ｂおよびＥＧＲ用のガス流出部５ｃを備えてなる。ＥＧＲクーラ５は水冷であり、クーラ本体部５ｂに冷却水供給管２３と冷却水排出管２４が接続されている。そうして、図６（平面図）および図７（断面図）に示すように、ガス導入部５ａが下流側カバー１８ｃの排気ガス取出口２２に接続されて、ＥＧＲクーラ５は、扁平な下流側カバー１８ｃに沿うように、フィルタ１９の軸心Ｃｆを挟んで排気ガス取出口２２の反対側、つまり、後方へ延びている。   The EGR cooler 5 includes a gas inlet 5a for EGR, a cooler main body 5b, and a gas outlet 5c for EGR connected in series. The EGR cooler 5 is water-cooled, and a cooling water supply pipe 23 and a cooling water discharge pipe 24 are connected to the cooler main body 5b. Then, as shown in FIG. 6 (plan view) and FIG. 7 (cross-sectional view), the gas introduction part 5a is connected to the exhaust gas outlet 22 of the downstream cover 18c, and the EGR cooler 5 has a flat downstream shape. Along the side cover 18 c, the filter 19 extends to the opposite side of the exhaust gas outlet 22, that is, to the rear, with the axis Cf of the filter 19 interposed therebetween.

ここに、ＥＧＲクーラ５を粒子状物質処理装置４の下流側カバー１８ｃに沿うように配置することができたのは、ＥＧＲ用の排気ガス取出口２２の中心を前方にオフセットさせた結果である。また、排気ガスをテールパイプに導く排気ガス排出口２１を後方に向かって開口させて、粒子状物質処理装置４の下流側カバー１８ｃを扁平形状にしたことにより、ＥＧＲクーラ５を粒子状物質処理装置４の下流側の端面に接近させてフィルタ１９の軸心Ｃｆを横切る形に設けることができている。   Here, the EGR cooler 5 can be arranged along the downstream cover 18c of the particulate matter processing device 4 as a result of offsetting the center of the exhaust gas outlet 22 for EGR forward. . Further, the exhaust gas discharge port 21 that leads the exhaust gas to the tail pipe is opened rearward, and the downstream cover 18c of the particulate matter processing device 4 is flattened, so that the EGR cooler 5 is treated with the particulate matter treatment. It can be provided so as to cross the axial center Cf of the filter 19 so as to approach the downstream end face of the device 4.

このように、ＥＧＲクーラ５と粒子状物質処理装置４を該粒子状物質処理装置の軸心方向において互いに接近させて言わば一体的にまとめることができるため、これらをエンジン本体まわりの限られたスペースに配置することが容易になる。しかも、粒子状物質処理装置４はその直径が比較的大きな部品であるため、ＥＧＲクーラを粒子状物質処理装置４からその軸心方向および径方向に大きく突出させずとも、必要なクーラ容量を確保することができる。   In this way, since the EGR cooler 5 and the particulate matter processing device 4 can be brought together and brought together in the axial direction of the particulate matter processing device, they can be integrated together, so that these are limited spaces around the engine body. It becomes easy to arrange in. Moreover, since the particulate matter treatment device 4 is a component having a relatively large diameter, the required cooler capacity can be ensured without causing the EGR cooler to protrude greatly from the particulate matter treatment device 4 in the axial direction and the radial direction. can do.

さらに、上述の排気ガス排出口２１とＥＧＲ用の排気ガス取出口２２のレイアウトによれば、エンジンの背圧の低減、並びにフィルタ１９における粒子状物質の分散担持にも有利に働く。   Further, according to the layout of the exhaust gas outlet 21 and the exhaust gas outlet 22 for EGR described above, it advantageously works to reduce the back pressure of the engine and to disperse and carry the particulate matter in the filter 19.

すなわち、下流側カバー１８ｃが粒子状物質処理装置４の後方に向かって突出し、その先端に排気ガス排出口２１が開口しているということは、テールパイプに向かう排気ガスがフィルタ１９の軸心Ｃｆを挟んでＥＧＲ用排気ガス取出口２２の反対側に流れるということである。   That is, the downstream cover 18c protrudes toward the rear of the particulate matter processing device 4 and the exhaust gas discharge port 21 is opened at the tip thereof. This means that the exhaust gas directed to the tail pipe is in the axial center Cf of the filter 19. Is that it flows to the opposite side of the exhaust gas outlet 22 for EGR.

つまり、図７に矢符で示すように、ＥＧＲ中は、フィルタ１９の中央部に流入した排気ガスがテールパイプに向かう流れとＥＧＲクーラ５に向かう流れとに分かれることになる。そのため、排気ガスがフィルタ１９を通過し易くなり、エンジンの背圧低減に有利になる。また、排気ガス流れが中央部から二手に分かれることにより、排気ガス流がフィルタ１９の下流側で中央部から周囲に分散されやすくなるため、粒子状物質をフィルタ１９の中央部から周囲に分散させて堆積させていくことができ、局部的な目詰まり防止に有利になる。   That is, as indicated by arrows in FIG. 7, during EGR, the exhaust gas flowing into the center portion of the filter 19 is divided into a flow toward the tail pipe and a flow toward the EGR cooler 5. Therefore, the exhaust gas easily passes through the filter 19, which is advantageous for reducing the back pressure of the engine. Further, since the exhaust gas flow is split into two from the central portion, the exhaust gas flow is easily dispersed from the central portion to the periphery on the downstream side of the filter 19, so that the particulate matter is dispersed from the central portion of the filter 19 to the periphery. This is advantageous for preventing local clogging.

また、上記ＥＧＲクーラ５においては、その後端のガス流出部５ｃにＥＧＲ用ガスの流出口２５が側方（粒子状物質処理装置４の反対側）に向かって開口している。そして、この流出口２５にＥＧＲバルブ６が接続されている。これにより、粒子状物質処理装置４、ＥＧＲクーラ５およびＥＧＲバルブ６は、エンジン本体１の側面（背面）に沿って該エンジン本体１の長手方向に配列されている。   In the EGR cooler 5, an EGR gas outlet 25 is open to the side (opposite side of the particulate matter treatment device 4) at the gas outlet 5 c at the rear end. The EGR valve 6 is connected to the outlet 25. Thereby, the particulate matter processing device 4, the EGR cooler 5, and the EGR valve 6 are arranged in the longitudinal direction of the engine body 1 along the side surface (back surface) of the engine body 1.

よって、粒子状物質処理装置４、ＥＧＲクーラ５およびＥＧＲバルブ６をエンジン本体１の側面にコンパクトにまとめることができ、これら吸排気系部品をエンジン本体まわりの限られたスペースに配置することが容易になる。   Therefore, the particulate matter treatment device 4, the EGR cooler 5 and the EGR valve 6 can be compactly assembled on the side surface of the engine body 1, and these intake and exhaust system parts can be easily arranged in a limited space around the engine body. become.

１ エンジン本体
３ 触媒コンバータ
４ 粒子状物質処理装置
５ ＥＧＲクーラー
６ ＥＧＲバルブ
７ 連結管
１８ｃ 下流側カバー
１９ フィルタ
２１ 排気ガス排出口
２２ ＥＧＲ用の排気ガス取出口 DESCRIPTION OF SYMBOLS 1 Engine main body 3 Catalytic converter 4 Particulate matter processing apparatus 5 EGR cooler 6 EGR valve 7 Connecting pipe 18c Downstream side cover 19 Filter 21 Exhaust gas exhaust port 22 Exhaust gas outlet for EGR

Claims (4)

エンジンの排気ガス中の粒子状物質を捕集するフィルタを有する粒子状物質処理装置と、ＥＧＲ用の排気ガスを冷却するＥＧＲクーラとを備えたエンジンの排気装置において、
上記粒子状物質処理装置は、上記フィルタの下流側の端面を覆う下流側カバーを備え、
上記下流側カバーに、排気ガスをテールパイプに導く排気ガス排出口と排気ガスを上記ＥＧＲクーラに導くＥＧＲ用の排気ガス取出口が開口しており、
上記ＥＧＲ用の排気ガス取出口が上記下流側カバーの上記フィルタの軸心からオフセットした位置に配置され、
上記ＥＧＲクーラが、上記排気ガス取出口に接続されて、上記粒子状物質処理装置の下流側カバーに沿うように、上記フィルタの軸心を挟んで上記排気ガス取出口の反対側へ延びていることを特徴とするエンジンの排気装置。 In an exhaust system for an engine comprising a particulate matter processing device having a filter for collecting particulate matter in engine exhaust gas, and an EGR cooler for cooling exhaust gas for EGR,
The particulate matter treatment device includes a downstream cover that covers an end face on the downstream side of the filter,
An exhaust gas exhaust port for leading exhaust gas to the tail pipe and an exhaust gas outlet for EGR leading the exhaust gas to the EGR cooler are opened in the downstream cover,
The exhaust gas outlet for EGR is disposed at a position offset from the filter shaft center of the downstream cover,
The EGR cooler is connected to the exhaust gas outlet and extends to the opposite side of the exhaust gas outlet across the filter shaft so as to follow the downstream cover of the particulate matter processing device. An exhaust system for an engine. 請求項１において、
上記粒子状物質処理装置は上記フィルタの軸心が略水平にされ、
上記ＥＧＲクーラにＥＧＲ量を制御するＥＧＲバルブが接続され、
上記粒子状物質処理装置、ＥＧＲクーラおよびＥＧＲバルブがエンジン本体の側面に沿って該エンジン本体の長手方向に配列されていることを特徴とするエンジンの排気装置。 In claim 1,
In the particulate matter processing apparatus, the axis of the filter is substantially horizontal,
An EGR valve that controls the amount of EGR is connected to the EGR cooler,
An exhaust system for an engine, wherein the particulate matter treatment device, the EGR cooler, and the EGR valve are arranged in a longitudinal direction of the engine body along a side surface of the engine body. 請求項１又は請求項２において、
上記下流側カバーの排気ガス排出口は、上記テールパイプに向かう排気ガスが上記フィルタの軸心を挟んで上記ＥＧＲ用排気ガス取出口の反対側に流れるように設けられていることを特徴とするエンジンの排気装置。 In claim 1 or claim 2,
The exhaust gas exhaust port of the downstream cover is provided so that exhaust gas toward the tail pipe flows to the opposite side of the EGR exhaust gas outlet with the shaft center of the filter interposed therebetween. Engine exhaust system. 請求項３において、
上記粒子状物質処理装置の上方に触媒コンバータが配置され、
上記粒子状物質処理装置と上記触媒コンバータとが、該触媒コンバータから排気ガスを上記粒子状物質処理装置に導く湾曲した連結管によって接続され、
上記連結管の湾曲した管路の中心よりも該管路の外周側を流れる排気ガスが上記フィルタの上流端の中心に向かうように、上記管路の中心線を上記フィルタの上流端に向かって延ばした延長線が上記フィルタの軸心に対して上方にオフセットしていることを特徴とするエンジンの排気装置。 In claim 3,
A catalytic converter is disposed above the particulate matter processing apparatus,
The particulate matter treatment device and the catalytic converter are connected by a curved connecting pipe that guides exhaust gas from the catalytic converter to the particulate matter treatment device,
The center line of the pipe line is directed toward the upstream end of the filter so that the exhaust gas flowing on the outer peripheral side of the pipe line is directed toward the center of the upstream end of the filter rather than the center of the curved pipe line of the connecting pipe. An exhaust system for an engine, wherein the extended extension line is offset upward with respect to the axis of the filter.
JP2013195667A 2013-09-20 2013-09-20 Engine exhaust system Active JP6079531B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013195667A JP6079531B2 (en) 2013-09-20 2013-09-20 Engine exhaust system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013195667A JP6079531B2 (en) 2013-09-20 2013-09-20 Engine exhaust system

Publications (2)

Publication Number Publication Date
JP2015059559A JP2015059559A (en) 2015-03-30
JP6079531B2 true JP6079531B2 (en) 2017-02-15

Family

ID=52817275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013195667A Active JP6079531B2 (en) 2013-09-20 2013-09-20 Engine exhaust system

Country Status (1)

Country Link
JP (1) JP6079531B2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6369430B2 (en) * 2015-09-18 2018-08-08 マツダ株式会社 Exhaust system for turbocharged engine
CN109477423A (en) * 2016-07-27 2019-03-15 马自达汽车株式会社 The air intake-exhaust device of vehicle
JP2018076851A (en) * 2016-11-11 2018-05-17 いすゞ自動車株式会社 Exhaust system structure for internal combustion engine
JP6460212B2 (en) * 2017-03-10 2019-01-30 マツダ株式会社 Engine exhaust system
JP6436217B2 (en) * 2017-03-10 2018-12-12 マツダ株式会社 Engine exhaust system
JP6969409B2 (en) * 2018-01-26 2021-11-24 マツダ株式会社 Engine intake / exhaust device
JP2019127917A (en) * 2018-01-26 2019-08-01 マツダ株式会社 Intake/exhaust system for engine
JP7043849B2 (en) * 2018-01-26 2022-03-30 マツダ株式会社 Engine intake / exhaust device
FR3094415B1 (en) * 2019-03-29 2021-06-11 Faurecia Systemes Dechappement Exhaust gas recirculation tapping box
JP2021071089A (en) * 2019-10-31 2021-05-06 マツダ株式会社 Exhaust system for engine
CN113202603B (en) * 2021-05-10 2022-06-14 第一拖拉机股份有限公司 Tail gas processing apparatus who takes tail gas preliminary treatment for non-road diesel engine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4061677B2 (en) * 1997-10-13 2008-03-19 日産自動車株式会社 Engine exhaust purification system
JP4432685B2 (en) * 2004-09-06 2010-03-17 マツダ株式会社 Engine intake / exhaust system structure
JP5146303B2 (en) * 2008-12-24 2013-02-20 三菱自動車工業株式会社 Exhaust gas recirculation device
JP5494068B2 (en) * 2010-03-18 2014-05-14 マツダ株式会社 Engine exhaust system
US9810180B2 (en) * 2010-10-28 2017-11-07 Honda Motor Co., Ltd. EGR cooling structure
JP2012149558A (en) * 2011-01-18 2012-08-09 Toyota Motor Corp Exhaust gas recirculation system of internal combustion engine
JP2012215022A (en) * 2011-03-31 2012-11-08 Komatsu Ltd Engine unit

Also Published As

Publication number Publication date
JP2015059559A (en) 2015-03-30

Similar Documents

Publication Publication Date Title
JP6079531B2 (en) Engine exhaust system
KR101223383B1 (en) Exhaust-gas secondary treatment preceding a turbocharger
US20140053539A1 (en) Exhaust component mounting system
US10557398B2 (en) Exhaust pipe structure for internal combustion engine
JP6295195B2 (en) Work machine
JP2009091982A (en) Exhaust emission control device
JP5352676B2 (en) Internal combustion engine system and particulate filter device for internal combustion engine system
JP2009007977A (en) Exhaust emission control device for internal combustion engine
JP6508301B2 (en) Engine exhaust system
JP2004044483A (en) Exhaust emission control device
JP2002235528A (en) Exhaust emission control device
JP6252066B2 (en) Engine exhaust system
JP5553562B2 (en) Exhaust purification device
JP2003028008A (en) Egr device of internal combustion engine
JP6508300B2 (en) Engine exhaust system
JP2018040369A (en) Engine exhaust device
JP2009097435A (en) Exhaust emission control device
JP7028586B2 (en) Exhaust gas aftertreatment method and exhaust pipe of diesel engine
JP6805948B2 (en) Exhaust purification device
JP2019082181A (en) Exhaust device of engine
JP5233596B2 (en) Exhaust gas purification device
JP5553519B2 (en) Exhaust purification device
JP2018040370A (en) Engine exhaust device
JP2009114885A (en) Exhaust gas passage structure
JP2015194117A (en) Exhaust emission control system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160225

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20161213

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20161220

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170102

R150 Certificate of patent or registration of utility model

Ref document number: 6079531

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150