JPH0666208A - Exhaust gas reflux device of diesel engine - Google Patents
Exhaust gas reflux device of diesel engineInfo
- Publication number
- JPH0666208A JPH0666208A JP3259857A JP25985791A JPH0666208A JP H0666208 A JPH0666208 A JP H0666208A JP 3259857 A JP3259857 A JP 3259857A JP 25985791 A JP25985791 A JP 25985791A JP H0666208 A JPH0666208 A JP H0666208A
- Authority
- JP
- Japan
- Prior art keywords
- egr gas
- exhaust
- exhaust gas
- pipe
- egr
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010992 reflux Methods 0.000 title abstract 5
- 230000003647 oxidation Effects 0.000 claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 12
- 239000004071 soot Substances 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 230000003134 recirculating effect Effects 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 abstract description 9
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 9
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 4
- 230000003197 catalytic effect Effects 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/07—Mixed pressure loops, i.e. wherein recirculated exhaust gas is either taken out upstream of the turbine and reintroduced upstream of the compressor, or is taken out downstream of the turbine and reintroduced downstream of the compressor
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
-
- 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
- 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
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
- F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
-
- 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
- F02M26/27—Layout, e.g. schematics with air-cooled heat exchangers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、主として定置型のデ
ィーゼル機関に使用される排気ガス還流装置（ＥＧＲ装
置）に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation system (EGR system) mainly used for stationary diesel engines.
【０００２】[0002]
【従来の技術】ディーゼル機関において、排気ガスを吸
気側に還流させることによって、ＮＯｘを低減できるこ
とが知られている。2. Description of the Related Art In a diesel engine, it is known that NOx can be reduced by returning exhaust gas to the intake side.
【０００３】すなわち、排気通路の排気ガスをＥＧＲガ
ス還流回路によって吸気側に還流させ、これによって排
気ガスの一部を吸気と混合させて、機関へ供給させるこ
とで、大気中に排出されるＮＯｘを低減するものであ
る。That is, the exhaust gas in the exhaust passage is recirculated to the intake side by the EGR gas recirculation circuit, whereby a part of the exhaust gas is mixed with the intake air and supplied to the engine, whereby NOx is exhausted to the atmosphere. Is to reduce.
【０００４】このようなＥＧＲ装置において、ＥＧＲガ
ス還流回路に流入した排気ガス中には煤塵や未燃炭化水
素など、機関に対して悪影響を与える物質を含んでお
り、従来においてはこれらを取り除くため、ＥＧＲガス
還流回路中にパーティキュレートトラップを設けたもの
がある（例えば実開平１−１６６２５４公報参照）。In such an EGR device, the exhaust gas flowing into the EGR gas recirculation circuit contains substances that adversely affect the engine, such as soot dust and unburned hydrocarbons. , EGR gas recirculation circuit is provided with a particulate trap (for example, see Japanese Utility Model Laid-Open No. 1-166254).
【０００５】他方、ＥＧＲ装置を持たない通常の排気ガ
ス浄化装置においては、排気通路中にパーティキュレー
トトラップと酸化触媒を設けたものがある（実開昭５９
−１４８４１３号公報参照）。On the other hand, in a normal exhaust gas purifying device having no EGR device, there is one in which a particulate trap and an oxidation catalyst are provided in the exhaust passage (actual exploitation 59).
-148413 gazette).
【０００６】[0006]
【発明が解決しようとする課題】上記のように、従来の
ＥＧＲ装置では、回路中にパーティキュレートトラップ
を設けることによって、排気ガス中の不純物を除去する
ようにしており、これだけで十分と考えられていたが、
パーティキュレートトラップでは、煤塵などの大きな不
純物は除去できるが、未燃炭化水素は除去することがで
きず、そのため、これが吸気側に還流して吸気ポートや
吸気弁、あるいは、過給機の下流に設けたアフタークー
ラーなどに付着堆積して、これらを汚損し、最悪の場合
吸気ポートが閉そくするという不都合が生じている。As described above, in the conventional EGR device, the particulate trap is provided in the circuit to remove the impurities in the exhaust gas, which is considered sufficient. Was,
Particulate traps can remove large impurities such as soot and dust, but cannot remove unburned hydrocarbons, so that they flow back to the intake side and flow to the intake port, intake valve, or downstream of the supercharger. There is an inconvenience in that they adhere to and accumulate on the provided aftercooler and the like to contaminate them and, in the worst case, block the intake port.
【０００７】この発明は、このような従来の欠点を解消
して、ＥＧＲガス還流回路中の煤塵のみならず、未燃炭
化水素をも除去して、吸気ポートや吸気弁などにそれら
が付着堆積するのを防止することを目的とする。The present invention eliminates such conventional drawbacks and removes not only soot dust in the EGR gas recirculation circuit but also unburned hydrocarbons, and these deposits and deposits on the intake port, intake valve, etc. The purpose is to prevent.
【０００８】[0008]
【課題を解決するための手段】上記の課題を解決するた
め、この発明では、ＥＧＲガス還流回路中にパーティキ
ュレートトラップとその下流の酸化触媒層とを設けるも
のである。また、酸化触媒に必要とされる排気ガスの高
温を確保するため、ＥＧＲガス還流回路の入り口を排気
タービン過給機のタービン部上流に設けることが考えら
れる。In order to solve the above problems, the present invention provides a particulate trap and an oxidation catalyst layer downstream thereof in the EGR gas recirculation circuit. Further, in order to secure the high temperature of the exhaust gas required for the oxidation catalyst, it is conceivable to provide the inlet of the EGR gas recirculation circuit upstream of the turbine section of the exhaust turbine supercharger.
【０００９】[0009]
【作用】上記の構成によれば、パーティキュレートトラ
ップの下流に酸化触媒層を設けているので、煤塵のみな
らず未燃炭化水素をも除去できる。しかも、酸化触媒層
には、パーティキュレートトラップによって煤塵を除去
した排気ガスが流入するので、その酸化触媒層自身の汚
損をも防止することができる。According to the above construction, since the oxidation catalyst layer is provided downstream of the particulate trap, not only soot dust but also unburned hydrocarbon can be removed. Moreover, since the exhaust gas from which the dust trap has removed the dust flows into the oxidation catalyst layer, it is possible to prevent the oxidation catalyst layer itself from being contaminated.
【００１０】更に、酸化触媒は、ガス温度が高温である
ことが必要であるが、ＥＧＲガス還流回路の入り口を排
気タービン過給機のタービン部上流に設けることで、特
別の加熱装置を不要にできる。Further, the oxidation catalyst needs to have a high gas temperature, but by providing the inlet of the EGR gas recirculation circuit upstream of the turbine of the exhaust turbine supercharger, a special heating device is unnecessary. it can.
【００１１】[0011]
〈図１の回路の説明〉図において、１は、エンジン本
体、２は、そのエンジン本体の吸気マニホールド、３
は、排気マニホールドである。４は、排気タービン過給
機であって、そのタービン５が排気マニホールド３と排
気管６との接続部に取り付けられ、ブロワー７が吸気マ
ニホールド２と吸気管２との接続部に取り付けられてい
る。９は、吸気管８の吸入口に取り付けたエアクリーナ
である。また、吸気マニホールド２の途中にはインタク
ーラー１０が介装されている。<Description of Circuit in FIG. 1> In the figure, 1 is an engine body, 2 is an intake manifold of the engine body, 3
Is an exhaust manifold. Reference numeral 4 denotes an exhaust turbine supercharger, a turbine 5 of which is attached to a connecting portion between the exhaust manifold 3 and the exhaust pipe 6, and a blower 7 is attached to a connecting portion between the intake manifold 2 and the intake pipe 2. . An air cleaner 9 is attached to the intake port of the intake pipe 8. An intercooler 10 is installed in the middle of the intake manifold 2.
【００１２】排気管６の途中には、ＥＧＲガス還流回路
１２を構成するＥＧＲガス管１３の入口部が接続されて
いるが、そのＥＧＲガス管１３の出口側が、その途中の
スートトラップ１４とそのスートトラップ１４下流の加
熱ヒーター１７、その加熱ヒーター１７下流の酸化触媒
層２１、及び、酸化触媒層２１下流のＥＧＲガスクーラ
ー２２を介して、吸気管８の途中に接続され、この回路
を介して、排気管６中の排気ガスをＥＧＲガスとして、
ブロワー７手前の吸気管８へ還流させるようにしてい
る。An inlet of an EGR gas pipe 13 which constitutes the EGR gas recirculation circuit 12 is connected in the middle of the exhaust pipe 6, and the outlet side of the EGR gas pipe 13 is connected to the soot trap 14 and the soot trap in the middle thereof. The heater 17 downstream of the soot trap 14, the oxidation catalyst layer 21 downstream of the heater 17, and the EGR gas cooler 22 downstream of the oxidation catalyst layer 21 are connected in the middle of the intake pipe 8 and through this circuit. , The exhaust gas in the exhaust pipe 6 as EGR gas,
The air is returned to the intake pipe 8 in front of the blower 7.
【００１３】上記ＥＧＲガス管１３の入口部よりも下流
の排気管６の途中には、その排気管６を流れる排気ガス
の量を無段階に変更することのできる可変背圧制御バル
ブ１５が設けられ、この背圧制御バルブ１５を調節する
ことによって、ＥＧＲガス管１３へ還流する排気ガス圧
力を制御するものである。また、背圧制御バルブ１５よ
りも下流の排気管６の途中には、その排気ガスとの熱交
換によって、温水器その他の装置に使用する熱を取り出
す排気エコノマイザ１６が取り付けられている。A variable back pressure control valve 15 capable of continuously changing the amount of exhaust gas flowing through the exhaust pipe 6 is provided in the exhaust pipe 6 downstream of the inlet of the EGR gas pipe 13. The back pressure control valve 15 is adjusted to control the exhaust gas pressure recirculating to the EGR gas pipe 13. Further, an exhaust economizer 16 for removing heat used for a water heater and other devices by heat exchange with the exhaust gas is attached in the middle of the exhaust pipe 6 downstream of the back pressure control valve 15.
【００１４】更に、ＥＧＲガスクーラー２１の下流側に
は、負荷等の諸条件に応じてＥＧＲガス還流量をより細
かく制御するためのファイン制御用（微調整用）ＥＧＲ
率制御バルブ１８が設けられている。Further, on the downstream side of the EGR gas cooler 21, for fine control (for fine adjustment) EGR for finely controlling the EGR gas recirculation amount in accordance with various conditions such as load.
A rate control valve 18 is provided.
【００１５】図において、１９は、パーティキュレート
トラップ１４よりも上流において、ＥＧＲガス１３管の
外周をラギングする保温装置であって、これによって、
できるだけ酸化触媒層２１に流入するＥＧＲガスの温度
低下を防止するようにしている。この場合、加熱ヒータ
ーでもＥＧＲガス温度を高温にするようにしているが、
保温装置のみで十分な場合には、例えば、酸化触媒層２
１の手前に温度サンサー２３を設け、この温度センサー
２４に基づいてヒーター１７のスイッチ２４をオン−オ
フすることによって高温時にオフするようにしてもよ
い。In the figure, numeral 19 is a heat retaining device for lagging the outer circumference of the EGR gas 13 pipe upstream of the particulate trap 14.
The temperature of the EGR gas flowing into the oxidation catalyst layer 21 is prevented from decreasing as much as possible. In this case, the EGR gas temperature is made high even with the heater,
When only the heat retention device is sufficient, for example, the oxidation catalyst layer 2
The temperature sensor 23 may be provided in front of 1, and the switch 24 of the heater 17 may be turned on / off based on the temperature sensor 24 so that the heater 17 is turned off at a high temperature.
【００１６】図２は、上記加熱ヒーター１７のオンーオ
フを制御装置で自動制御するための、制御回路のブロッ
クダイヤグラムである。２４は、制御手段としてのマイ
クロコンピュータからなる制御手段であって、排気温度
センサー２３の検出結果をマイクロコンピュータ２４に
入力し、その入力結果に基づいて、排気温度がある温度
以上のときは、加熱ヒーター１７をオフし、それ以下の
ときはオンとなるよう制御する。図３に、その制御のフ
ローチャートを示している。FIG. 2 is a block diagram of a control circuit for automatically controlling ON / OFF of the heater 17 by the control device. Reference numeral 24 is a control means composed of a microcomputer as a control means, which inputs the detection result of the exhaust gas temperature sensor 23 to the microcomputer 24 and, based on the input result, heats the exhaust gas when a certain temperature or higher. The heater 17 is turned off, and when it is less than that, it is controlled to be turned on. FIG. 3 shows a flowchart of the control.
【００１７】〈図４の回路の説明〉図４は、この出願の
第２の発明に従って実施される実施例で、前記ＥＧＲガ
ス還流回路１２の入り口を、排気タービン過給機４のタ
ービン５部上流に接続して、より高温の排気ガスを還流
させるようにしたものである。その他の構成は、図１と
同様である。即ち、排気タービン過給機４を取り付けた
機関では、そのタービン５部の仕事によって排気ガス温
度が低下し、一般にタービン５部下流よりも上流の方が
100℃程度高く、これにより、加熱ヒーター１７のオン
時間をより短くしてこの回路のようにより小型の加熱ヒ
ーター１７を使用するか、或いは全く不要として、低コ
ストに実施できるようにしたものである。<Description of Circuit of FIG. 4> FIG. 4 shows an embodiment implemented in accordance with the second invention of the present application, in which the inlet of the EGR gas recirculation circuit 12 is connected to the turbine 5 part of the exhaust turbine supercharger 4. It is connected upstream so as to recirculate the hotter exhaust gas. Other configurations are the same as those in FIG. That is, in an engine equipped with the exhaust turbine supercharger 4, the work of the turbine 5 part lowers the exhaust gas temperature, and in general the upstream part of the turbine 5 part is more upstream than the downstream part.
The temperature is about 100 ° C. higher, so that the ON time of the heating heater 17 can be shortened to use a smaller heating heater 17 as in this circuit, or the heating heater 17 can be implemented at a low cost without using it at all. .
【００１８】[0018]
【発明の効果】以上のように、この発明では、ＥＧＲガ
ス還流回路中にパーティキュレートトラップを設けるの
みならず、そのパーティキュレートトラップの下流に酸
化触媒層を設けているので、煤塵のみならず未燃炭化水
素をも除去でき、かかる未燃炭化水素が吸気側に還流し
て吸気ポートや吸気弁あるいは、過給機の下流に設けた
アフタークーラーなどに付着堆積して、これらを汚損す
るという不都合を解消することができる。しかも、酸化
触媒層には、パーティキュレートトラップによって煤塵
を除去した排気ガスが流入するので、その酸化触媒層自
身の汚損をも防止することができる。As described above, according to the present invention, not only the particulate trap is provided in the EGR gas recirculation circuit, but also the oxidation catalyst layer is provided downstream of the particulate trap. The inconvenience that it is possible to remove the combustion hydrocarbons, and the unburned hydrocarbons recirculate to the intake side and adhere to and accumulate on the intake port and intake valve, or the aftercooler installed downstream of the supercharger, and contaminate them. Can be resolved. Moreover, since the exhaust gas from which the dust trap has removed the dust flows into the oxidation catalyst layer, it is possible to prevent the oxidation catalyst layer itself from being contaminated.
【００１９】更に、酸化触媒は、ガス温度が高温である
ことが必要であるが、ＥＧＲガス還流回路の入り口を排
気タービン過給機のタービン部上流に設けているので、
加熱装置が不要となるか少なくとも従来よりも小型の加
熱ヒーターを用いることができ、より低コストに取り付
けることができる。Further, the oxidation catalyst needs to have a high gas temperature, but since the inlet of the EGR gas recirculation circuit is provided upstream of the turbine section of the exhaust turbine supercharger,
No heating device is required, or at least a heater smaller than conventional heaters can be used, and the heater can be installed at a lower cost.
【図１】この発明の実施例を示すＥＧＲ装置の回路図で
ある。FIG. 1 is a circuit diagram of an EGR device showing an embodiment of the present invention.
【図２】加熱ヒーターの制御装置のブロックダイヤグラ
ムである。FIG. 2 is a block diagram of a controller for a heater.
【図３】同じく加熱ヒーターの制御装置のフローチャー
トである。FIG. 3 is a flowchart of a control device for the heater as well.
【図４】この発明の別の実施例を示すＥＧＲ装置の回路
図である。FIG. 4 is a circuit diagram of an EGR device showing another embodiment of the present invention.
１ エンジン本体 ４ 過給機 ６ 排気管 １２ ＥＧＲガス還流回路 １４ パーティキュレートトラップ １７ 加熱ヒータ ２１ 酸化触媒層 1 Engine Body 4 Supercharger 6 Exhaust Pipe 12 EGR Gas Recirculation Circuit 14 Particulate Trap 17 Heater 21 Oxidation Catalyst Layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０１Ｎ 3/24 ＺＡＢ Ｅ Ｓ Ｔ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location F01N 3/24 ZAB E ST
Claims (2)
ス還流回路を備えたディーゼル機関において、前記ＥＧ
Ｒガス還流回路中の煤塵を除去するパーティキュレート
トラップと、そのパーティキュレートトラップの下流の
酸化触媒層とを設けたことを特徴とするディーゼル機関
の排気ガス還流装置。1. A diesel engine having an EGR gas recirculation circuit for recirculating exhaust gas to the intake side, wherein the EG
An exhaust gas recirculation device for a diesel engine, comprising: a particulate trap for removing soot and dust in the R gas recirculation circuit; and an oxidation catalyst layer downstream of the particulate trap.
機関において、前記過給機のタービン部上流の排気ガス
を吸気側に還流させるＥＧＲガス還流回路を設けるとと
もに、このＥＧＲガス還流回路中に酸化触媒層を設けた
ことを特徴とするディーゼル機関の排気ガス還流装置。2. A diesel engine equipped with an exhaust turbine supercharger is provided with an EGR gas recirculation circuit for recirculating exhaust gas upstream of the turbine of the supercharger to the intake side, and oxidation is carried out in the EGR gas recirculation circuit. An exhaust gas recirculation device for a diesel engine, which is provided with a catalyst layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3259857A JPH0666208A (en) | 1991-09-10 | 1991-09-10 | Exhaust gas reflux device of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3259857A JPH0666208A (en) | 1991-09-10 | 1991-09-10 | Exhaust gas reflux device of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0666208A true JPH0666208A (en) | 1994-03-08 |
Family
ID=17339940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3259857A Pending JPH0666208A (en) | 1991-09-10 | 1991-09-10 | Exhaust gas reflux device of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666208A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000077353A2 (en) | 1999-06-15 | 2000-12-21 | Johnson Matthey Public Limited Company | Improvements in emissions control |
| KR100309143B1 (en) * | 1997-12-24 | 2001-12-17 | 김영봉 | Method for controlling temperature of exhaust gas for diesel engine |
| WO2001092711A3 (en) * | 2000-05-26 | 2002-03-28 | Engelhard Corp | Low pressure exhaust gas recirculation system for supercharged diesel engines |
| EP1179673A3 (en) * | 2000-08-07 | 2002-12-18 | Filterwerk Mann + Hummel Gmbh | Device for recirculating gas in a combustion engine |
| FR2833653A1 (en) * | 2001-12-14 | 2003-06-20 | Peugeot Citroen Automobiles Sa | Diesel engine exhaust gas recycling (EGR) system has actuator for cleaning phase in which deposits in circuit are eliminated by heat |
| EP1101908A3 (en) * | 1999-11-17 | 2003-07-02 | Volkswagen Aktiengesellschaft | Device and method for reducing harmful components in the exhaust gas of an internal combustion engine, especially a Diesel-internal-combustion engine |
| US6598396B2 (en) * | 2001-11-16 | 2003-07-29 | Caterpillar Inc | Internal combustion engine EGR system utilizing stationary regenerators in a piston pumped boost cooled arrangement |
| WO2005028848A1 (en) * | 2003-09-18 | 2005-03-31 | Behr Gmbh & Co. Kg | Exhaust-gas heat exchanger, in particular exhaust-gas cooler for exhaust gas recirculation in motor vehicles |
| US6922987B2 (en) | 2003-02-12 | 2005-08-02 | Fleetguard, Inc. | System and method for enhancing internal combustion engine aftertreatment applications by superheated fuel injection |
| US7043914B2 (en) | 2002-11-15 | 2006-05-16 | Isuzu Motors Limited | EGR system for internal combustion engine provided with a turbo-charger |
| WO2007042181A1 (en) * | 2005-10-12 | 2007-04-19 | Behr Gmbh & Co. Kg | Device for recirculating and cooling exhaust gas of an internal combustion engine |
| WO2007123011A1 (en) | 2006-04-10 | 2007-11-01 | Isuzu Motors Limited | Exhaust gas purification method and exhaust gas purification system |
| FR2925608A3 (en) * | 2007-12-19 | 2009-06-26 | Renault Sas | Low-pressure exhaust gas recirculation device for internal combustion engine, has cooler including housing comprising filtration element that filters non-combustible particles of gas and is inclined with respect to gas flow direction |
| JP2009270517A (en) * | 2008-05-08 | 2009-11-19 | Toyota Motor Corp | Internal combustion engine |
| US7770385B2 (en) * | 2003-11-25 | 2010-08-10 | Emcon Technologies Llc | Internal combustion engine exhaust system |
| CN108252829A (en) * | 2018-04-04 | 2018-07-06 | 吉林大学 | A kind of binary channels EGR regulating devices and its control method |
| JP2021124063A (en) * | 2020-02-05 | 2021-08-30 | 株式会社アルテミス | Internal combustion engine |
-
1991
- 1991-09-10 JP JP3259857A patent/JPH0666208A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100309143B1 (en) * | 1997-12-24 | 2001-12-17 | 김영봉 | Method for controlling temperature of exhaust gas for diesel engine |
| US7189374B1 (en) | 1999-06-15 | 2007-03-13 | Johnson Matthey Public Limited Company | Emissions control |
| WO2000077353A2 (en) | 1999-06-15 | 2000-12-21 | Johnson Matthey Public Limited Company | Improvements in emissions control |
| EP1559880A1 (en) * | 1999-11-17 | 2005-08-03 | Volkswagen AG | Device and method for reducing harmful components in the exhaust gas of an internal combustion engine, especially a Diesel-internal-combustion engine |
| EP1101908A3 (en) * | 1999-11-17 | 2003-07-02 | Volkswagen Aktiengesellschaft | Device and method for reducing harmful components in the exhaust gas of an internal combustion engine, especially a Diesel-internal-combustion engine |
| WO2001092711A3 (en) * | 2000-05-26 | 2002-03-28 | Engelhard Corp | Low pressure exhaust gas recirculation system for supercharged diesel engines |
| EP1179673A3 (en) * | 2000-08-07 | 2002-12-18 | Filterwerk Mann + Hummel Gmbh | Device for recirculating gas in a combustion engine |
| US6598396B2 (en) * | 2001-11-16 | 2003-07-29 | Caterpillar Inc | Internal combustion engine EGR system utilizing stationary regenerators in a piston pumped boost cooled arrangement |
| FR2833653A1 (en) * | 2001-12-14 | 2003-06-20 | Peugeot Citroen Automobiles Sa | Diesel engine exhaust gas recycling (EGR) system has actuator for cleaning phase in which deposits in circuit are eliminated by heat |
| US7043914B2 (en) | 2002-11-15 | 2006-05-16 | Isuzu Motors Limited | EGR system for internal combustion engine provided with a turbo-charger |
| US6922987B2 (en) | 2003-02-12 | 2005-08-02 | Fleetguard, Inc. | System and method for enhancing internal combustion engine aftertreatment applications by superheated fuel injection |
| WO2005028848A1 (en) * | 2003-09-18 | 2005-03-31 | Behr Gmbh & Co. Kg | Exhaust-gas heat exchanger, in particular exhaust-gas cooler for exhaust gas recirculation in motor vehicles |
| US7481040B2 (en) | 2003-09-18 | 2009-01-27 | Behr Gmbh & Co. Kg | Exhaust-gas heat exchanger, in particular exhaust-gas cooler for exhaust gas recirculation in motor vehicles |
| US7770385B2 (en) * | 2003-11-25 | 2010-08-10 | Emcon Technologies Llc | Internal combustion engine exhaust system |
| US8209967B2 (en) | 2003-11-25 | 2012-07-03 | Emcon Technologies Llc | Internal combustion engine exhaust system |
| WO2007042181A1 (en) * | 2005-10-12 | 2007-04-19 | Behr Gmbh & Co. Kg | Device for recirculating and cooling exhaust gas of an internal combustion engine |
| WO2007123011A1 (en) | 2006-04-10 | 2007-11-01 | Isuzu Motors Limited | Exhaust gas purification method and exhaust gas purification system |
| US8056321B2 (en) | 2006-04-10 | 2011-11-15 | Isuzu Motors Limited | Exhaust gas purification method and exhaust gas purification system |
| FR2925608A3 (en) * | 2007-12-19 | 2009-06-26 | Renault Sas | Low-pressure exhaust gas recirculation device for internal combustion engine, has cooler including housing comprising filtration element that filters non-combustible particles of gas and is inclined with respect to gas flow direction |
| JP2009270517A (en) * | 2008-05-08 | 2009-11-19 | Toyota Motor Corp | Internal combustion engine |
| CN108252829A (en) * | 2018-04-04 | 2018-07-06 | 吉林大学 | A kind of binary channels EGR regulating devices and its control method |
| CN108252829B (en) * | 2018-04-04 | 2023-10-24 | 吉林大学 | Dual-channel EGR (exhaust gas recirculation) adjusting device and control method thereof |
| JP2021124063A (en) * | 2020-02-05 | 2021-08-30 | 株式会社アルテミス | Internal combustion engine |
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