JPS5823974Y2 - Exhaust gas recirculation control device for internal combustion engines - Google Patents
Exhaust gas recirculation control device for internal combustion enginesInfo
- Publication number
- JPS5823974Y2 JPS5823974Y2 JP1977169374U JP16937477U JPS5823974Y2 JP S5823974 Y2 JPS5823974 Y2 JP S5823974Y2 JP 1977169374 U JP1977169374 U JP 1977169374U JP 16937477 U JP16937477 U JP 16937477U JP S5823974 Y2 JPS5823974 Y2 JP S5823974Y2
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- valve
- exhaust gas
- opening
- electromagnetic
- 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
Links
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Description
【考案の詳細な説明】
本考案は、内燃機関の排気浄化装置、特に排気ガス還流
装置に釦ける還流制御装置に関するものである。[Detailed Description of the Invention] The present invention relates to an exhaust gas purification device for an internal combustion engine, and particularly to a recirculation control device for an exhaust gas recirculation device.
排気ガスの一部を吸気系に還流して（以下ＥＧＲと称す
）窒素酸化物（ＮＯｘ）の発生を抑制する装置では、排
気ガス還流を制御するＥＧＲバルプヲ設ケ、該ＥＧＲバ
ルブを作動させる負圧装置を、吸入管のスロットルバル
ブのアイトリ／グ位置の直上流に設けられた開口と連通
し、スロットルバルブを開いた時に生ずる開口部の負圧
により負圧装置を作動させ、ＥＧＲパルプを開いて排気
ガスを還流するようにしている。In a device that suppresses the generation of nitrogen oxides (NOx) by recirculating a portion of exhaust gas to the intake system (hereinafter referred to as EGR), an EGR valve is installed to control the exhaust gas recirculation, and a negative valve is installed to operate the EGR valve. The pressure device is communicated with an opening provided immediately upstream of the throttle valve's trigger position in the suction pipe, and the negative pressure generated at the opening when the throttle valve is opened operates the negative pressure device to open the EGR pulp. The exhaust gas is recirculated.
ところが、スロットルバルブを高開度にして加速する時
には、開口部の負圧が抜けてし１つて負圧装置が作動せ
ｆＥＧＲ。However, when accelerating by opening the throttle valve at a high opening, the negative pressure at the opening is released and the negative pressure device is activated, resulting in fEGR.
が行われないことになる。will not be carried out.
そのため、ＮＯｘの排出量が多くなり、所期の排気浄化
を達成できなくなると言う問題を生ずる。Therefore, a problem arises in that the amount of NOx emitted increases, making it impossible to achieve the desired exhaust gas purification.
本考案は、上記のような問題を解消したＥＧＲ制御装置
を提供せんとするもので、吸入管内の負圧を蓄積する負
圧タンクを、他方がスロットルバルブ上流側に連なる電
磁三方弁を介してＥＧＲパルプ作動用負圧室に連通させ
る。The present invention aims to provide an EGR control device that solves the above-mentioned problems, and the negative pressure tank that accumulates negative pressure in the suction pipe is connected to the electromagnetic three-way valve, the other of which is connected to the upstream side of the throttle valve. It communicates with the negative pressure chamber for EGR pulp operation.
又電磁三方弁と吸入管負圧が所定負圧より低くなった時
閉じる接点と、ミッションをニュートラル又は低速位置
以外の位置にした時に閉じる接点とを直列に結ぶ電気回
路を形成せしめ、スロットルバルブ高開度時にこれら接
点が閉じ、電磁三方弁を切り換えて負圧タンクをＥＧＲ
パルプに連通し、ＥＧＲバルブを開いて充分なＥＧＲを
行うようにしてＥＧＲ制御を、吸入管負圧と□ツショ７
変速位置の両者の共働関係に釦いて行うようにした点に
特徴を有するものである。In addition, an electric circuit is formed that connects the electromagnetic three-way valve in series with a contact that closes when the suction pipe negative pressure becomes lower than a predetermined negative pressure and a contact that closes when the transmission is placed in a position other than neutral or low speed. When opened, these contacts close and switch the electromagnetic three-way valve to EGR the negative pressure tank.
The EGR control is performed by communicating with the pulp and opening the EGR valve to perform sufficient EGR.
This is characterized by the fact that the shift position is changed by pressing a button in a cooperative relationship between the two positions.
な釦、この種の問題に対応する排気ガス還流制御装置と
しては、特開昭５２−８１４２７号公報に記載されてい
る先行技術のように、ＥＧＲを行わせる手段として通常
時吸入管負圧を蓄積する負圧夕／りを設り、機関の運転
状態すなわち機関の回転速度、スロットル開度、吸入負
圧、排気圧カベフチユリ負圧などから検出された少なく
とも１つの要素の電気的換算値が入力されるデユーティ
回路によって当該タンク内に蓄積された負圧でＥＧＲバ
ルブを所定時間開いてＥＧＲを行うようにしたものがあ
る。As an exhaust gas recirculation control device to deal with this kind of problem, as in the prior art described in Japanese Patent Application Laid-open No. 52-81427, a negative pressure in the intake pipe is normally used as a means to perform EGR. The electrical conversion value of at least one element detected from the engine operating state, that is, engine speed, throttle opening, suction negative pressure, exhaust pressure, etc., is input. There is a system in which the EGR valve is opened for a predetermined period of time using the negative pressure accumulated in the tank to perform EGR.
以下図面を参照して説明する。This will be explained below with reference to the drawings.
図は本考案を水平対向工／ジ／に適用した例を示し、１
はエンジン、２はエアクリーナ、３はべ／チュリ、４は
スロットルバルブ、５は吸入管で、スロットルバルブ４
のアイトリフグ開度の直上流にＥＧＲ，用負圧取出口６
が設けられ、そこより導管７により電磁三方弁８を介し
てＥＧＲバルブ９を作動させる負圧室９ｂに連通してい
る。The figure shows an example in which the present invention is applied to a horizontally opposed work.
is the engine, 2 is the air cleaner, 3 is the exhaust valve, 4 is the throttle valve, 5 is the intake pipe, and the throttle valve 4
There is a negative pressure outlet 6 for EGR immediately upstream of the opening of the eyelid blower.
is provided, from which the conduit 7 communicates via an electromagnetic three-way valve 8 to a negative pressure chamber 9b which operates an EGR valve 9.
該ＥＧＲパルプ９の弁装置９ａは排気管１０と吸入管５
とを連通するＥＧＲ通路１１を開閉し、ＥＧＲ量を制御
できるようになっている。The valve device 9a of the EGR pulp 9 has an exhaust pipe 10 and an intake pipe 5.
The EGR amount can be controlled by opening and closing the EGR passage 11 that communicates with the engine.
前記電磁三方弁８の他方のポートは、導管１２により負
圧タンク１３、ダ７パーバルプ１４を介して吸入管５の
スロットルバルブ下流側に連通している。The other port of the electromagnetic three-way valve 8 is connected via a conduit 12 to a downstream side of the throttle valve of the suction pipe 5 via a negative pressure tank 13 and a double valve 14 .
ダンパーバルブ１４ｒｉ負圧タンク側より吸入管側への
流通を許すワンウェイバルブ１４ａと絞り１４ｂとより
なる。Damper valve 14ri consists of a one-way valve 14a and a throttle 14b that allow flow from the negative pressure tank side to the suction pipe side.
更に電磁三方弁の励磁コイル１５はブーストスイッチ１
６． ミッションスイッチ１７．１８と直列に結ばれ
て電源１９に接続されている。Furthermore, the excitation coil 15 of the electromagnetic three-way valve is connected to the boost switch 1.
6. It is connected in series with the mission switches 17 and 18 and connected to the power source 19.
ブーストスイッチ１６は負圧室２０が管２１により□吸
入管５に連通し、吸入管負圧が低くなるとスイッチが閉
じるようになっている。In the boost switch 16, the negative pressure chamber 20 is connected to the suction pipe 5 through a pipe 21, and the switch is closed when the negative pressure in the suction pipe becomes low.
ミッションスイッチ１７ｄミツジヨ／をニュートラルの
位置にすると開き、□ミッション、スイッチ１８はロー
に入れると開くように設けられている。It opens when the mission switch 17d is set to the neutral position, and opens when the □ mission switch 18 is set to the low position.
以上のような構成であるから、吸入管５内の負圧はダン
パーパルプ１４を経て負圧タンク１３内ニ蓄積すれる。With the above configuration, the negative pressure in the suction pipe 5 is accumulated in the negative pressure tank 13 via the damper pulp 14.
□ミッションがニュートラル位置又はローで走行中であ
れば、具インチ１フ又ｄ１８が開き、電磁三方弁８ｒｉ
不作動で導管７をＥＧＲパルプ９に連通している。□If the transmission is running in the neutral position or low, the tool inch 1f or d18 opens, and the solenoid three-way valve 8ri opens.
When inactive, the conduit 7 is connected to the EGR pulp 9.
従って、スロットルバルブ４の開度に応じ、負圧取出口
６の負圧が負圧室９ｂに至り、ダイヤフラムを偏位させ
て弁装置９ａを開きスロットルバルブ開度に応じたＥＧ
Ｒを行う。Therefore, depending on the opening degree of the throttle valve 4, the negative pressure in the negative pressure outlet 6 reaches the negative pressure chamber 9b, and the diaphragm is deflected to open the valve device 9a and the EG is adjusted according to the opening degree of the throttle valve 4.
Do R.
ミッションをセカンド以上の変速位置にするとスイッチ
１８も閉じるが、スロットルバルブの開度が大きくない
時は、吸入管負圧が高く、ブーストスイッチ１６は開い
たｉｔで、電磁三方弁８は励磁されず、ＥＧＲ制御制御
化変化い。When the transmission is set to the second or higher gear shift position, the switch 18 is also closed, but when the throttle valve opening is not large, the suction pipe negative pressure is high, the boost switch 16 is open, and the electromagnetic three-way valve 8 is not energized. , EGR control control change.
スロットルバルブが高開度になると、吸入管負圧が設定
値に達し、ブーストスイッチ１６が閉じ、コイル１５が
励磁し、電磁三方弁８が切換る。When the throttle valve is opened to a high degree, the suction pipe negative pressure reaches the set value, the boost switch 16 is closed, the coil 15 is energized, and the electromagnetic three-way valve 8 is switched.
これにより負圧夕／り１３がＥＧＲバルブ９の負圧室９
ｂに連通し、ＥＧＲの作動を中断することなく充分な排
気ガス還流が行われる。As a result, the negative pressure chamber 9 of the EGR valve 9 becomes negative pressure chamber 13.
b, and sufficient exhaust gas recirculation is performed without interrupting EGR operation.
更に高開度状態が続くと、絞り１４ｂを通って負圧が吸
入管に逃げ、ＥＧＲバルブ９が吸入管負圧に応じて閉じ
、ＥＧＲを少くするか、又は停止する。If the high opening state continues further, negative pressure escapes to the suction pipe through the throttle 14b, and the EGR valve 9 closes in response to the suction pipe negative pressure, reducing or stopping EGR.
従って所定以上の加速の時だけＥＧＲが行われる。Therefore, EGR is performed only when acceleration exceeds a predetermined value.
車速の低い時にＥＧＲを過度に行うと走行性が悪くなる
が、ミッションのロー位置ではスイッチ１７が開きそれ
を防ぐことかできる。If EGR is performed excessively when the vehicle speed is low, driving performance will deteriorate, but this can be prevented by opening the switch 17 when the transmission is in the low position.
以上で明かなように本考案によれば、ミッションを低速
位置以外にし、かつスロットルバルブを高開度にして加
速した時に負圧が抜けてＥＧＲ制御不能になることを防
ぎ、ＮＯｘの発生なＭＩＪ Ｌ、所期の排気浄化効果を
発揮することができる。As is clear from the above, according to the present invention, when accelerating with the transmission in a position other than the low speed position and the throttle valve at a high opening, it is possible to prevent negative pressure from escaping and EGR control to become uncontrollable, and to prevent NOx generation from MIJ. L. The desired exhaust gas purification effect can be achieved.
しかモ、低車速時にｒｉＥＧＲをポートコ／トロールし
、走行性の低下を防ぐことができる。Moreover, the riEGR can be port controlled/trolled at low vehicle speeds to prevent deterioration in driving performance.
更に本考案においては、登板時のようにミッションが低
速位置にあればスロットルバルブを高開度にした時には
通常のポート負圧によるＥＧＲ制御となり、従っでエフ
シフの走行性を悪化することがない。Furthermore, in the present invention, when the transmission is in a low speed position such as when climbing a hill, when the throttle valve is opened to a high degree, EGR control is performed using normal port negative pressure, so the running performance of the F-shift is not deteriorated.
図は本考案の一実施例を示す図である。
１・・・工／ジ／、２・・・エアクリーナ、３・・・ベ
ンチュリ、４・・・スロットルバルブ、５・・・吸入管
、６・・・負圧取出口、７′・・・導管、８・・・電磁
三方弁、９・・・ＥＧＲバルブ、ト０・・・排気管、１
１・・・ＥＧＲ通路、１２・・・導管、１３：・・負圧
タンク、１４・・・ダ〉パーバルブ、１５・・・励磁コ
イル、１６・・・フーストスイツｆ、１７．１８・・エ
フシフ／スイッチ、１９・−・電源、２０・・・負圧室
、２１・・・管。The figure shows an embodiment of the present invention. 1...Work/J/, 2...Air cleaner, 3...Venturi, 4...Throttle valve, 5...Suction pipe, 6...Negative pressure outlet, 7'...Conduit , 8... Solenoid three-way valve, 9... EGR valve, 0... Exhaust pipe, 1
DESCRIPTION OF SYMBOLS 1... EGR passage, 12... Conduit, 13:... Negative pressure tank, 14... Daper valve, 15... Excitation coil, 16... Foust switch f, 17.18... F-shift/ Switch, 19... Power supply, 20... Negative pressure chamber, 21... Tube.
Claims (1)
作動装置を設け、該負圧作動装置の負圧室を電磁三方弁
を介して、一方はスロットルバルブのアイドリンク開度
では上流側で、所定開度以上では下流になる位置の混合
気吸入通路に開口した負圧取出口に連通し、他方は負圧
タンク、ワンウェイパルプを介して吸入管のスロットル
バルブ下流側に連通した構成とし、かつ前記電磁三方弁
の励磁コイルを、スロットルバルブ高開度の吸入管圧力
で閉じる接点、およびミッションの低速及びニュートラ
ル位置以外の位置で閉じる接点、を介して電源に接続し
、ミツショ／の低速位置以外でスロットルバルブの高開
度による走行時に電磁三方弁を切り換えて負圧夕／りを
負圧作動装置の負圧室に連通ずるようにしたことを特徴
とする内燃機関にかける排気ガス還流制御装置。A negative pressure actuator is provided to operate an exhaust gas recirculation valve that controls exhaust gas recirculation, and the negative pressure chamber of the negative pressure actuator is controlled via an electromagnetic three-way valve, one of which is on the upstream side depending on the idle link opening of the throttle valve. , when the opening is above a predetermined opening degree, it communicates with a negative pressure outlet opened in the mixture suction passage located downstream, and the other communicates with the downstream side of the throttle valve of the suction pipe via a negative pressure tank and one-way pulp, The excitation coil of the electromagnetic three-way valve is connected to a power source via a contact that closes when the intake pipe pressure is applied at a high opening of the throttle valve, and a contact that closes when the transmission is at a position other than the low speed or neutral position. Exhaust gas recirculation control applied to an internal combustion engine characterized by switching an electromagnetic three-way valve to communicate negative pressure chamber to a negative pressure chamber of a negative pressure actuating device by switching an electromagnetic three-way valve when driving with a high throttle valve opening. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977169374U JPS5823974Y2 (en) | 1977-12-16 | 1977-12-16 | Exhaust gas recirculation control device for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977169374U JPS5823974Y2 (en) | 1977-12-16 | 1977-12-16 | Exhaust gas recirculation control device for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5493622U JPS5493622U (en) | 1979-07-03 |
| JPS5823974Y2 true JPS5823974Y2 (en) | 1983-05-23 |
Family
ID=29171384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1977169374U Expired JPS5823974Y2 (en) | 1977-12-16 | 1977-12-16 | Exhaust gas recirculation control device for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5823974Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281427A (en) * | 1975-12-29 | 1977-07-07 | Nissan Motor Co Ltd | Exhaust return controller |
-
1977
- 1977-12-16 JP JP1977169374U patent/JPS5823974Y2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281427A (en) * | 1975-12-29 | 1977-07-07 | Nissan Motor Co Ltd | Exhaust return controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5493622U (en) | 1979-07-03 |
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