JPH0734983A - Exhaust gas recirculation device for engine with supercharger - Google Patents

Exhaust gas recirculation device for engine with supercharger

Info

Publication number
JPH0734983A
JPH0734983A JP5202492A JP20249293A JPH0734983A JP H0734983 A JPH0734983 A JP H0734983A JP 5202492 A JP5202492 A JP 5202492A JP 20249293 A JP20249293 A JP 20249293A JP H0734983 A JPH0734983 A JP H0734983A
Authority
JP
Japan
Prior art keywords
intercooler
exhaust
engine
passage
exhaust gas
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.)
Granted
Application number
JP5202492A
Other languages
Japanese (ja)
Other versions
JP2835999B2 (en
Inventor
Hiroyuki Sugihara
啓之 杉原
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.)
Hino Motors Ltd
Original Assignee
Hino Motors Ltd
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 Hino Motors Ltd filed Critical Hino Motors Ltd
Priority to JP5202492A priority Critical patent/JP2835999B2/en
Publication of JPH0734983A publication Critical patent/JPH0734983A/en
Application granted granted Critical
Publication of JP2835999B2 publication Critical patent/JP2835999B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)

Abstract

PURPOSE:To provide an exhaust gas recirculation device which is constituted to reduced contamination of an intercooler owing to carbon in exhaust gas during recirculation of exhaust gas from an engine with a supercharger. CONSTITUTION:An exhaust gas recirculation device for an engine with a supercharger comprises an exhaust passage 5 through which the exhaust side of an engine 1 is connected to the exhaust turbine 4a of a supercharger 4; a feed passage 7 through which the compressor 4b of the supercharger 4 is connected to a portion situated upper stream from an intercooler; and a feed passage 8 through which a portion situated downstream from the intercooler is connected to the intake side of the engine 1. The feed passage 7 situated upper stream from the intercooler 6 is connected to the exhaust passage 5 through an exhaust valve 10 and the feed passage 7 situated upper stream from the intercooler is connected to the feed passage 8 situated downstream from the intercooler through a bypass passage 11. The bypass passage 11 is connected to the feed passage 7 situated upper stream from the intercooler through a direction switching solenoid valve 12, and a controller 14 is provided for controlling the exhaust valve 10 and the direction switching solenoid valve 12 so that a part of exhaust gas is caused to flow through an intercooler 6 during middle and high load running of an engine and through the bypass passage 11 during low load running.

Description

【発明の詳細な説明】Detailed Description of the Invention

【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 engine of an automobile to which a supercharger is not attached, exhaust gas recirculation (EGR) that reduces a portion of exhaust gas discharged from the engine exhaust passage to the intake passage and reduces NOx is performed. Has been 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 the engine equipped with the supercharger, the supply air compressed by the compressor is always cooled by the intercooler and supplied to the intake side of the engine. For this reason, there is a problem that the intercooler performance is deteriorated due to a large increase rate of dirt in the intercooler due to carbon contained in the exhaust gas.

【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 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 for achieving the above object is to provide a supercharger comprising an exhaust turbine and a compressor rotated by the exhaust turbine,
From 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. The upstream air supply passage of the intercooler and the exhaust air passage are connected through an exhaust valve, and the intercooler upstream air supply passage and the intercooler downstream air supply passage are connected by a bypass passage. The bypass passage and the air supply passage on the upstream side of the intercooler are connected via a direction switching electromagnetic valve, and a part of the exhaust gas is passed through the intercooler at the time of high load in the exhaust valve and the engine, and at the time of low load, the bypass. A controller for controlling the direction switching electromagnetic valve 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 construction, when the engine is of high load in the middle, a part of the exhaust gas is merged from the supercharger to the air supply passage passing through the air supply passage and is supplied to the intake side of the engine through the intercooler. When the engine has a low load, the passage to the intercooler is cut off and 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
The intake manifold 3 on the intake side is 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,
Compressor 4 rotated by this exhaust turbine 4a
b and. The exhaust turbine 4 a of the supercharger 4 is connected to the exhaust manifold 3 via an exhaust passage 5.

【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 4b of the supercharger 4 is connected to the upstream side of the intercooler 6 via an air supply passage 7. Further, the 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。An air supply passage 7 connected to the upstream side of the intercooler 6, an exhaust passage 5 connected to the exhaust manifold 3 and an exhaust turbine 4a are connected to each other by a connecting passage 9
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 the air supply passage 8 on the downstream side 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 air supply passage 7 on the upstream side of the intercooler 6. ing. The bypass passage 1
1 and the directional control electromagnetic valve 12 arranged at the branch point between the upstream air supply passage 7 of the intercooler 6 and the directional control electromagnetic valve at the connection point of the downstream air supply passage 8 and the bypass passage 11 of the intercooler 6. 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, 13
A rotation signal A and a load signal B of the engine 1 are input. The rotation signal A is detected by a rotation sensor (not shown), and the load signal is detected by a load sensor (not shown).

【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 structure, exhaust gas recirculation (hereinafter referred to as E
When not performing GR), 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. As a result, all of the air supplied from the supercharger 4 through the air supply passage 7 is supplied to the intake manifold 2 of the engine 1 through the intercooler 6 and the air 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 has a medium or high load, the direction switching electromagnetic valves 12 and 13 are switched to close the bypass passage 11. As a result, a part of the exhaust gas is merged into the air supply from the supercharger 4 through the air supply passage 7, and the intercooler 6
And is supplied to the intake manifold 2 of the engine 1 through 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 engine load is low, the directional solenoid valves 12 and 13 shut off the intercooler passage and open the bypass passage. As a result, part of the supply air and the exhaust gas passing through the supply air passage 7 bypasses the intercooler 6 and passes through the bypass passage 11 and is supplied from the supply air passage 8 to the intake manifold 2 of the engine 1. In this case, since the discharge temperature of the compressor 4b and the exhaust gas temperature are both low, the effect of reducing NOx even if the intercooler 6 is bypassed,
There is almost no effect on fuel consumption, and the intercooler 6 can be prevented from becoming dirty.

【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,
Part of the exhaust gas is passed through the intercooler when the load is high, and is supplied to the intake side of the engine through the bypass passage when the load is low. Has the effect of securing.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明装置の系統図FIG. 1 is a system diagram of the device of the present invention.

【符号の説明】[Explanation of symbols]

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 1 engine 2 intake manifold 3 exhaust manifold 4 supercharger 4a exhaust turbine 4b compressor 5 exhaust passage 6 intercooler 7 air supply passage 8 air supply passage 9 connecting passage 10 exhaust valve 11 bypass passage 12 directional switching electromagnetic valve 14 controller

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 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。1. A supercharger comprising an exhaust turbine and 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 upstream of the intercooler. Is connected via an exhaust valve, the air supply passage on the upstream side of the intercooler and the air supply passage on the downstream side of the intercooler are connected by a bypass passage, and the bypass passage and the air supply passage on the upstream side of the intercooler are switched in direction. A controller that is connected via an electromagnetic valve and controls the direction switching electromagnetic valve so that a part of the exhaust gas is passed through the intercooler when the exhaust valve and the engine have a high load in the engine and passes through the bypass passage when the load is low An exhaust gas recirculation system for a supercharged engine.
JP5202492A 1993-07-26 1993-07-26 Exhaust gas recirculation system for turbocharged engine Expired - Fee Related JP2835999B2 (en)

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 true JPH0734983A (en) 1995-02-03
JP2835999B2 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)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0940567A3 (en) * 1998-03-05 2000-05-10 Volkswagen Aktiengesellschaft Air Intake system for a combustion engine
GB2391587A (en) * 2002-06-21 2004-02-11 Detroit Diesel Corp Turbocharged engine having exhaust gas recirculation with a single intercooler and integral bypass valve with condensation sensor
FR2857417A1 (en) * 2003-07-07 2005-01-14 Renault Sa Air intake circuit for internal combustion engine, has distribution chamber with control circuit connecting inputs and outputs in one position and cross connecting inputs and outputs in another position
US7011080B2 (en) 2002-06-21 2006-03-14 Detroit Diesel Corporation Working fluid circuit for a turbocharged engine having exhaust gas recirculation
JP2012237271A (en) * 2011-05-13 2012-12-06 Toyota Motor Corp Egr device
JP2014509364A (en) * 2011-02-11 2014-04-17 ボルボ ラストバグナー アーベー Engine arrangement with charge air cooler and EGR system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0940567A3 (en) * 1998-03-05 2000-05-10 Volkswagen Aktiengesellschaft Air Intake system for a combustion engine
DE19809412B4 (en) * 1998-03-05 2010-11-11 Volkswagen Ag Intake system for combustion air supply of an internal combustion engine
GB2391587A (en) * 2002-06-21 2004-02-11 Detroit Diesel Corp Turbocharged engine having exhaust gas recirculation with a single intercooler and integral bypass valve with condensation sensor
GB2391587B (en) * 2002-06-21 2004-06-02 Detroit Diesel Corp Working fluid circuit for a turbocharged engine having exhaust gas recirculation
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
FR2857417A1 (en) * 2003-07-07 2005-01-14 Renault Sa Air intake circuit for internal combustion engine, has distribution chamber with control circuit connecting inputs and outputs in one position and cross connecting inputs and outputs in another position
JP2014509364A (en) * 2011-02-11 2014-04-17 ボルボ ラストバグナー アーベー Engine arrangement with charge air cooler and EGR system
JP2012237271A (en) * 2011-05-13 2012-12-06 Toyota Motor Corp Egr device

Also Published As

Publication number Publication date
JP2835999B2 (en) 1998-12-14

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