JP2835999B2 - Exhaust gas recirculation system for turbocharged engine - Google Patents
Exhaust gas recirculation system for turbocharged engineInfo
- Publication number
- JP2835999B2 JP2835999B2 JP5202492A JP20249293A JP2835999B2 JP 2835999 B2 JP2835999 B2 JP 2835999B2 JP 5202492 A JP5202492 A JP 5202492A JP 20249293 A JP20249293 A JP 20249293A JP 2835999 B2 JP2835999 B2 JP 2835999B2
- Authority
- JP
- Japan
- Prior art keywords
- intercooler
- exhaust
- engine
- passage
- supply passage
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
- F02B29/0418—Layout of the intake air cooling or coolant circuit the intake air cooler having a bypass or multiple flow paths within the heat exchanger to vary the effective heat transfer surface
-
- 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
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、過給機付エンジンの排
気ガス再循環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 for a supercharged engine.
【０００２】[0002]
【従来の技術】過給機が取り付けられていない自動車の
エンジンにおいては、エンジンの排気通路から排出され
る排気ガスの一部を吸気通路に戻し、ＮＯｘを低減する
排気ガス再循環（ＥＧＲ）が行われている。2. Description of the Related Art In an automobile engine without a turbocharger, an exhaust gas recirculation (EGR) for returning a part of exhaust gas discharged from an exhaust passage of the engine to an intake passage and reducing NOx is performed. Is being done.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、過給機
付のエンジンにおいては、コンプレッサで圧縮された給
気を常時インタークーラで冷却してエンジンの吸気側へ
供給している。そのため、排気ガスに含まれているカー
ボン等によってインタクーラの汚れの増加速度が大き
く、インタクーラの性能を悪くする問題がある。However, in an engine with a supercharger, the supply air compressed by a compressor is always cooled by an intercooler and supplied to the intake side of the engine. Therefore, there is a problem that the rate of increase in contamination of the intercooler is large due to carbon and the like contained in the exhaust gas, and the performance of the intercooler is deteriorated.
【０００４】本発明の目的は、上記の問題を解消した過
給機付エンジンの排気ガス再循環装置を提供することで
ある。It is an object of the present invention to provide an exhaust gas recirculation system for a supercharged engine that solves the above-mentioned problems.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の要旨は、排気タービンと、この排気タービ
ンによって回転するコンプレッサとからなる過給機と、
エンジンの排気側と前記排気タービンを接続した排気通
路と、前記コンプレッサとインタクーラの上流側とを接
続した給気通路と、前記インタクーラの下流側とエンジ
ンの吸気側とを接続した給気通路とからなり、前記イン
タクーラの上流側の給気通路と排気通路とを排気バルブ
を介して接続し、前記インタクーラ上流側の給気通路と
前記インタクーラ下流側の給気通路とをバイパス通路で
接続し、このバイパス通路と前記インタクーラ上流側の
給気通路とを方向切換電磁バルブを介して接続し、前記
排気バルブとエンジンの中、高負荷時に排気ガスの一部
を前記インタクーラに通し、低負荷時には前記バイパス
通路を通すよう前記方向切換電磁バルブを制御するコン
トローラを備えたものである。The gist of the present invention to achieve the above object is to provide a supercharger comprising an exhaust turbine and a compressor rotated by the exhaust turbine.
An exhaust passage connecting the exhaust side of the engine and the exhaust turbine, an air supply passage connecting the compressor and the upstream side of the intercooler, and an air supply passage connecting the downstream side of the intercooler and the intake side of the engine. An air supply passage on the upstream side of the intercooler and an exhaust passage are connected via an exhaust valve, and an air supply passage on the upstream side of the intercooler and an air supply passage on the downstream side of the intercooler are connected by a bypass passage. A bypass passage and an air supply passage on the upstream side of the intercooler are connected via a direction switching electromagnetic valve, and a part of exhaust gas passes through the intercooler at a high load during the exhaust valve and the engine, and the bypass passes at a low load. A controller for controlling the direction switching electromagnetic valve so as to pass through the passage is provided.
【０００６】[0006]
【作用】上記の構成により、エンジンの中、高負荷の場
合には、過給機から給気通路を通る給気に排気ガスの一
部を合流させ、インタクーラを通してエンジンの吸気側
に供給し、エンジンの低負荷の場合には、インタクーラ
への通路を遮断し、バイパス通路を通してエンジンの吸
気側に供給する。With the above arrangement, when the engine is under a heavy load, a part of the exhaust gas is joined from the supercharger to the supply air passing through the supply passage, and supplied to the intake side of the engine through the intercooler. When the load of the engine is low, the passage to the intercooler is shut off and the air is supplied to the intake side of the engine through the bypass passage.
【０００７】[0007]
【実施例】以下本発明の実施例を図面に基づいて説明す
る。図１において、１はエンジン、２は前記エンジン１
の吸気側のインテークマニホールド、３は前記エンジン
１の排気側のエキゾーストマニホールドである。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is an engine, 2 is the engine 1
Reference numeral 3 denotes an exhaust manifold on the exhaust side of the engine 1.
【０００８】４は過給機であり、排気タービン４ａと、
この排気タービン４ａによって回転するコンプレッサ４
ｂとから構成されている。前記過給機４の排気タービン
４ａに前記エキゾーストマニホールド３と排気通路５を
介して接続されている。Reference numeral 4 denotes a supercharger, which includes an exhaust turbine 4a,
The compressor 4 rotated by the exhaust turbine 4a
b. The exhaust manifold 4 is connected to the exhaust turbine 4 a of the supercharger 4 via the exhaust manifold 3.
【０００９】前記過給機４のコンプレッサ４ｂは給気通
路７を介してインタクーラ６の上流側に接続されてい
る。また、前記インタクーラ６の下流側とエンジン１の
インテークマニホールド２とを給気通路８によって接続
している。The compressor 4 b of the supercharger 4 is connected to the upstream side of the intercooler 6 via an air supply passage 7. Further, a downstream side of the intercooler 6 and the intake manifold 2 of the engine 1 are connected by an air supply passage 8.
【００１０】前記インタクーラ６の上流側に接続された
給気通路７と前記エキゾーストマニホールド３と排気タ
ービン４ａに接続されている排気通路５とを連絡通路９
で接続し、この連絡通路９に排気バルブ１０が設けられ
ている。A communication passage 9 connects an air supply passage 7 connected to the upstream side of the intercooler 6 and an exhaust passage 5 connected to the exhaust manifold 3 and the exhaust turbine 4a.
, And an exhaust valve 10 is provided in the communication passage 9.
【００１１】前記インタクーラ６の上流側の給気通路７
と前記インタクーラ６の下流側の給気通路８とをバイパ
ス通路１１で接続し、このバイパス通路１１と前記イン
タクーラ６の上流側の給気通路７との分岐点に方向切換
電磁バルブ１２が配置されている。前記バイパス通路１
１とインタクーラ６の上流側の給気通路７との分岐点に
配置した方向切換電磁バルブ１２の他に、インタクーラ
６の下流側の給気通路８とバイパス通路１１の接続点に
方向切換電磁バルブ１３を設けてもよい。An air supply passage 7 upstream of the intercooler 6
And a supply passage 8 downstream of the intercooler 6 are connected by a bypass passage 11, and a direction switching electromagnetic valve 12 is arranged at a branch point between the bypass passage 11 and the supply passage 7 upstream of the intercooler 6. ing. The bypass passage 1
In addition to the direction switching electromagnetic valve 12 disposed at a branch point between the air supply passage 1 and the air supply passage 7 upstream of the intercooler 6, a direction switching electromagnetic valve is provided at a connection point between the air supply passage 8 downstream of the intercooler 6 and the bypass passage 11. 13 may be provided.
【００１２】１４は前記方向切換電磁バルブ１２，１３
を切換制御するコントローラであり、エンジン１の回転
信号Ａ及び負荷信号Ｂが入力される。回転信号Ａは図略
の回転センサで、また負荷信号は図略の負荷センサによ
って検出する。Reference numeral 14 denotes the direction switching electromagnetic valves 12 and 13.
, And receives a rotation signal A and a load signal B of the engine 1. The rotation signal A is detected by an unillustrated rotation sensor, and the load signal is detected by an unillustrated load sensor.
【００１３】上記の構成において、排気再循環（以下Ｅ
ＧＲという）を行わない場合は、排気バルブ１０は閉止
され、方向切換電磁バルブ１２はバイパス通路１１を閉
止し、給気通路７はインタクーラ６と通じるよう切り替
えらる。これにより、過給機４からの給気通路７を通る
給気の全部がインタクーラ６を通って給気通路８を介し
てエンジン１のインテークマニホールド２に供給され
る。In the above configuration, exhaust gas recirculation (hereinafter referred to as E
When GR is not performed, the exhaust valve 10 is closed, the direction switching electromagnetic valve 12 closes the bypass passage 11, and the air supply passage 7 is switched to communicate with the intercooler 6. Thus, all of the supply air from the supercharger 4 passing through the supply passage 7 is supplied to the intake manifold 2 of the engine 1 through the intercooler 6 and the supply passage 8.
【００１４】また、ＥＧＲを行う時には、コントローラ
１４の指令信号によって排気バルブ１０が開口される。
このとき、エンジンの中、高負荷の場合には、方向切換
電磁バルブ１２，１３はバイパス通路１１を閉止するよ
う切り換える。これにより、過給機４から給気通路７を
通る給気に排気ガスの一部を合流させ、インタクーラ６
を通して冷却され、給気通路８よりエンジン１のインテ
ークマニホールド２に供給される。When performing EGR, the exhaust valve 10 is opened by a command signal from the controller 14.
At this time, when the engine is under a heavy load, the direction switching electromagnetic valves 12 and 13 switch so as to close the bypass passage 11. As a result, a part of the exhaust gas merges with the supply air passing through the air supply passage 7 from the supercharger 4 and the intercooler 6
And is supplied to the intake manifold 2 of the engine 1 from the air supply passage 8.
【００１５】エンジンの低負荷の場合には、方向切換電
磁バルブ１２，１３はインタクーラの通路を遮断し、バ
イパス通路を開口する。これにより、給気通路７を通る
給気と排気ガスの一部はインタクーラ６を迂回してバイ
パス通路１１を通り、給気通路８よりエンジン１のイン
テークマニホールド２に供給される。この場合、コンプ
レッサ４ｂの吐出温度、排気ガス温度共に低温であるか
ら、インタクーラ６を迂回しても、ＮＯｘの低減効果、
燃費ともほとんど影響がなく、インタクーラ６の汚れを
抑止することができる。When the load of the engine is low, the direction switching electromagnetic valves 12 and 13 shut off the passage of the intercooler and open the bypass passage. As a result, a part of the supply gas and the exhaust gas passing through the supply passage 7 bypasses the intercooler 6, passes through the bypass passage 11, and is supplied from the supply passage 8 to the intake manifold 2 of the engine 1. In this case, since both the discharge temperature of the compressor 4b and the exhaust gas temperature are low, even if the air bypasses the intercooler 6, the reduction effect of NOx can be obtained.
The fuel efficiency is hardly affected, and the contamination of the intercooler 6 can be suppressed.
【００１６】[0016]
【発明の効果】以上のように本発明は、エンジンの中、
高負荷時に排気ガスの一部をインタクーラに通し、低負
荷時にはバイパス通路を通してエンジンの吸気側へ供給
するため、排気ガス中のカーボン等によるインタクーラ
の汚れを低減し、インタクーラの性能を長期に渡って確
保する効果を有している。As described above, according to the present invention, in the engine,
Part of the exhaust gas passes through the intercooler when the load is high, and is supplied to the engine intake side through the bypass passage when the load is low. It has the effect of securing.
【図１】本発明装置の系統図FIG. 1 is a system diagram of the apparatus of the present invention.
【符号の説明】 １ エンジン ２ インテークマニホールド ３ エキゾーストマニホールド ４ 過給機 ４ａ 排気タービン ４ｂ コンプレッサ ５ 排気通路 ６ インタクーラ ７ 給気通路 ８ 給気通路 ９ 連絡通路 １０ 排気バルブ １１ バイパス通路 １２ 方向切換電磁バルブ １４ コントローラ[Description of Signs] 1 Engine 2 Intake manifold 3 Exhaust manifold 4 Supercharger 4a Exhaust turbine 4b Compressor 5 Exhaust passage 6 Intercooler 7 Supply air passage 8 Supply air passage 9 Communication passage 10 Exhaust valve 11 Bypass passage 12 Direction switching electromagnetic valve 14 controller
Claims (1)
って回転するコンプレッサとからなる過給機と、エンジ
ンの排気側と前記排気タービンを接続した排気通路と、
前記コンプレッサとインタクーラの上流側とを接続した
給気通路と、前記インタクーラの下流側とエンジンの吸
気側とを接続した給気通路とからなり、前記インタクー
ラの上流側の給気通路と排気通路とを排気バルブを介し
て接続し、前記インタクーラ上流側の給気通路と前記イ
ンタクーラ下流側の給気通路とをバイパス通路で接続
し、このバイパス通路と前記インタクーラ上流側の給気
通路とを方向切換電磁バルブを介して接続し、前記排気
バルブとエンジンの中、高負荷時に排気ガスの一部を前
記インタクーラに通し、低負荷時には前記バイパス通路
を通すよう前記方向切換電磁バルブを制御するコントロ
ーラを備えたことを特徴とする過給機付エンジンの排気
ガス再循環装置。A supercharger comprising an exhaust turbine, a compressor rotated by the exhaust turbine, an exhaust passage connecting an exhaust side of an engine and the exhaust turbine,
An air supply passage connecting the compressor and the upstream side of the intercooler, and an air supply passage connecting the downstream side of the intercooler and the intake side of the engine, and an air supply passage and an exhaust passage on the upstream side of the intercooler. Are connected via an exhaust valve, and the supply passage on the upstream side of the intercooler and the supply passage on the downstream side of the intercooler are connected by a bypass passage. A controller connected through an electromagnetic valve to control the direction switching electromagnetic valve so that a part of exhaust gas passes through the intercooler at a high load and passes through the bypass passage at a low load in the engine and the engine. An exhaust gas recirculation device for a supercharged engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5202492A JP2835999B2 (en) | 1993-07-26 | 1993-07-26 | Exhaust gas recirculation system for turbocharged engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5202492A JP2835999B2 (en) | 1993-07-26 | 1993-07-26 | Exhaust gas recirculation system for turbocharged engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0734983A JPH0734983A (en) | 1995-02-03 |
| JP2835999B2 true JP2835999B2 (en) | 1998-12-14 |
Family
ID=16458398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5202492A Expired - Fee Related JP2835999B2 (en) | 1993-07-26 | 1993-07-26 | Exhaust gas recirculation system for turbocharged engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2835999B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19809412B4 (en) * | 1998-03-05 | 2010-11-11 | Volkswagen Ag | Intake system for combustion air supply of an internal combustion engine |
| US6786210B2 (en) | 2002-06-21 | 2004-09-07 | Detroit Diesel Corporation | Working fluid circuit for a turbocharged engine having exhaust gas recirculation |
| US7011080B2 (en) | 2002-06-21 | 2006-03-14 | Detroit Diesel Corporation | Working fluid circuit for a turbocharged engine having exhaust gas recirculation |
| FR2857417B1 (en) * | 2003-07-07 | 2007-05-25 | Renault Sa | INTAKE CIRCUIT FOR SUPERCURRENT PARTICLE FILTER ENGINE |
| JP5754755B2 (en) * | 2011-02-11 | 2015-07-29 | ボルボ ラストバグナー アーベー | Engine arrangement with charge air cooler and EGR system |
| JP5589953B2 (en) * | 2011-05-13 | 2014-09-17 | トヨタ自動車株式会社 | EGR device |
-
1993
- 1993-07-26 JP JP5202492A patent/JP2835999B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0734983A (en) | 1995-02-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |