JPS58220946A - Exhaust gas recycle control device - Google Patents
Exhaust gas recycle control deviceInfo
- Publication number
- JPS58220946A JPS58220946A JP57104181A JP10418182A JPS58220946A JP S58220946 A JPS58220946 A JP S58220946A JP 57104181 A JP57104181 A JP 57104181A JP 10418182 A JP10418182 A JP 10418182A JP S58220946 A JPS58220946 A JP S58220946A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- valve
- suction pressure
- exhaust gas
- pressure
- 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
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
- F02M26/52—Systems for actuating EGR valves
- F02M26/55—Systems for actuating EGR valves using vacuum actuators
- F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本轟萌は内燃機関の排気ガス対策に使用される排気還流
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 recirculation control device used to control exhaust gas from internal combustion engines.
従来のこの種の装置は第１図の如く構成されており、排
気ガスの再循環を制御するバルブ１１はモジユレータ２
０の負圧出力ボート８からの信号圧力に応じて再循環通
路２１を開閉するようになっていた。そしてモジユレー
タ２０はバルブ１１の圧力室２２かもの圧力、及びスロ
ットルバルブ（１）
１５が中開き開度の位置に開口した負圧源ボート 。A conventional device of this kind is constructed as shown in FIG.
The recirculation passage 21 was opened and closed in response to the signal pressure from the negative pressure output boat 8 at zero. The modulator 20 is a negative pressure source boat in which the pressure of the pressure chamber 22 of the valve 11 and the throttle valve (1) 15 are opened to a middle opening position.
１７からの負圧に応じ°Ｃ信号圧力を制御し°Ｃいた。The °C signal pressure was controlled according to the negative pressure from 17 °C.
ただ、この従来の構成では、第２図の負圧出力ポート８
Ｑ負圧特性のように、加速及びシフトアンプ加速直後の
負圧の立ち上がりが遅くなり、排気還流量が少ないため
、この時にＮＯｘの多量発生を招き易いという問題があ
った。However, in this conventional configuration, the negative pressure output port 8 in FIG.
As with the Q negative pressure characteristic, the rise of negative pressure immediately after acceleration and shift amplifier acceleration is slow, and the amount of exhaust gas recirculation is small, so there is a problem that a large amount of NOx is likely to be generated at this time.
併せて、低速と中速の定常走行時の排気還流量にも差が
あり、また、排気還流する時の排気還流量が不゛安定に
なり易いため定常走行時のアクセルの踏み込み量まで不
安定になり易いなどの問題もあった。In addition, there is a difference in the amount of exhaust gas recirculated during steady driving at low and medium speeds, and since the amount of exhaust gas recirculated during exhaust gas recirculation tends to become unstable, even the amount of accelerator pedal depression during steady driving is unstable. There were also problems such as the tendency to become
本発明者等の検討によれば、この原因は、スロットルバ
ルブ１５が負圧源ボート１７への開口部と対向する位置
において、ボート１７に発生ずる負圧が非常に不安定に
なるためであることを究明した。According to studies by the present inventors, this is because the negative pressure generated in the boat 17 becomes extremely unstable at the position where the throttle valve 15 faces the opening to the negative pressure source boat 17. I found out.
本発明は、上記検討結果に基づいて案出されたもので、
負圧源ボー）１７から導入される負圧の急激な変動を抑
えて、排気還流を良好に制御でき（２）
るようにすることを目的とする。The present invention was devised based on the above study results, and
The purpose of this is to suppress rapid fluctuations in the negative pressure introduced from the negative pressure source 17 and to enable good control of exhaust gas recirculation (2).
即ち、本発明はスロットルバルブ中開き開度位置負圧源
ボートとモジュレータの負圧コントロールボートの間に
絞りを有する負圧制御弁を介在させることを基本的構成
とし、加速及びシフトアップ加速直後の負圧出力ボート
の負圧立ち上がりの応答性改善、ならびに、低速と中速
の定常走行時の排気還流有無の差の解消、及び定常走行
時の微小排気還保護の可能化を計る事を目的とする。That is, the basic structure of the present invention is to interpose a negative pressure control valve with a throttle between the negative pressure source boat of the throttle valve medium opening position and the negative pressure control boat of the modulator. The purpose is to improve the responsiveness of the negative pressure rise of a negative pressure output boat, eliminate the difference in the presence or absence of exhaust gas recirculation during steady running at low and medium speeds, and enable minute exhaust recirculation protection during steady running. do.
以下、本発明の一実施例を図に基づいて説明する。モジ
ュレータ２０はスロットルバルブ１５の少量開き開度位
置に開口する負圧源ボート１６で発生ずる負圧を負圧入
力ボート９を介して負圧コントロール室１へ導く。そし
て排気還流制御バルブ１１の圧力室２２の排気圧力を排
圧オリフィス５を介して排圧室４へ導き、この排圧室４
と１１圧室２３との差圧によってシート弁６を制御する
。Hereinafter, one embodiment of the present invention will be described based on the drawings. The modulator 20 guides the negative pressure generated in the negative pressure source boat 16 , which opens at a small opening position of the throttle valve 15 , to the negative pressure control chamber 1 via the negative pressure input boat 9 . Then, the exhaust pressure in the pressure chamber 22 of the exhaust gas recirculation control valve 11 is guided to the exhaust pressure chamber 4 via the exhaust pressure orifice 5.
The seat valve 6 is controlled by the differential pressure between the pressure chamber 23 and the pressure chamber 23.
従って、シート弁６とシート部絞り７との隙間は、スロ
ットルバルブ１５の中開き開度位−に開口した負圧源ボ
ー）１７の負性が負圧コントロールボ（３）
−トｌＯを介して導入されることによっても制御される
。そして、このシート弁６により大気導入孔２から導入
される大気圧、負圧源ボート１７より調圧室２３に導入
される負圧、及び負圧源ボー）１６より入力ボート９に
導入される負圧が調圧されて、信号圧力が負圧コントロ
ール室１に作られる。そして、この調整された負圧が負
圧出力ボート８の負圧となって排気還流制御装置バルブ
１１を作動させる構成となっている。Therefore, the gap between the seat valve 6 and the seat throttle 7 is such that the negative pressure of the negative pressure source 17, which is opened at the middle opening position of the throttle valve 15, is connected to the negative pressure control valve 3 through the negative pressure control valve 10. It is also controlled by the introduction of Atmospheric pressure is introduced from the atmosphere introduction hole 2 by this seat valve 6, negative pressure is introduced from the negative pressure source boat 17 into the pressure regulating chamber 23, and negative pressure is introduced from the negative pressure source boat 16 into the input boat 9. The negative pressure is regulated and a signal pressure is created in the negative pressure control chamber 1. This adjusted negative pressure becomes a negative pressure in the negative pressure output boat 8 and operates the exhaust gas recirculation control device valve 11.
また、冷間時には、排気還流制御装置バルブ１１を作動
させる負圧を逆止弁４３、水温感知弁２４を介して大気
ボート２５へ通じる配管を通して逃がすようになってい
る。そして、温間時になれば、吸気マニホールド負圧源
ボート４２からの負圧が水温感知弁２４を介して逆止弁
４３に至り、逆止弁４３が閉じる事によって排気還流制
御装置バルブ１１を作動させる負圧を逃がさない構成と
なっている。Further, when the engine is cold, the negative pressure that activates the exhaust gas recirculation control device valve 11 is released through a pipe leading to the atmospheric boat 25 via the check valve 43 and the water temperature sensing valve 24. When the temperature is warm, the negative pressure from the intake manifold negative pressure source boat 42 reaches the check valve 43 via the water temperature sensing valve 24, and the check valve 43 closes to operate the exhaust recirculation control device valve 11. The structure is designed to prevent negative pressure from escaping.
また、スロットルバルブ中開き開度位置負圧源ボート１
７と負圧コントロールボート１０の間に（４）
は、絞り１Ｂ−２のみ（第４図）また番よ、逆止弁ＩＥ
Ｉ−１付の絞り１８−２からなる（第３図）負圧制御弁
（ＶＴＶ）１Ｂが介在してもする。この負圧制御弁（Ｖ
ＴＶ）１Ｂは、負圧を力）％すた特番こ逆止弁１８−１
が閉じる方の端を負圧コントロールボートトｌＯと接続
しである。In addition, the throttle valve middle opening position negative pressure source boat 1
7 and the negative pressure control boat 10 (4) is only the throttle 1B-2 (Fig. 4). Also, the check valve IE
A negative pressure control valve (VTV) 1B (FIG. 3) consisting of a throttle 18-2 with an I-1 may be interposed. This negative pressure control valve (V
TV) 1B is a negative pressure force)% special check valve 18-1
The closed end is connected to the negative pressure control boat lO.
次に、」１記構成よりなる装置の作動を説明する。Next, the operation of the apparatus having the configuration described in item 1 will be explained.
ｆｆ１３図の実施例の場合、スロ・ノトルｔｉｔレブ１
５の開度がスロットルバルブ少量開き開度位置に対向す
る負圧源ボート１６より下の時（ま、負圧源ボー）１６
及びスロットルバルブ中開き開度位置負圧源ボート１７
にほとんど負圧がかからなも）ため、負圧出力ボート８
の負圧もほとんどなくて排気還流制御装置バルブｌｌが
開弁しないので、排気還流を行なわない。In the case of the example shown in ff13 figure, the slot nottle tit rev 1
When the opening degree of 5 is lower than the negative pressure source boat 16 opposite to the throttle valve small opening position (well, negative pressure source boat 16)
and throttle valve mid-open opening position negative pressure source boat 17
Since almost no negative pressure is applied to the negative pressure output boat 8
Since there is almost no negative pressure in the exhaust gas recirculation control device valve 11, the exhaust gas recirculation control device valve 11 does not open, so no exhaust gas recirculation is performed.
また、スロットルバルブ１５の開度がスロ・ノトルバル
ブ少量開き開度位置負圧ボート１６とスロットルバルブ
中開き開度位置負圧源ボート１７の間にある時は、まず
絞りによって負圧源ボート１７からの負圧が調整される
。そして、大気導入孔２（５）
からの大気圧とこの負圧源ボート１７より負圧コントロ
ールぼ−と１０を介して導入される負圧とによって調圧
室２３内の負圧が調整される。次に、シート弁６とシー
ト弁絞り７の隙間によってこの圧力が更に調整される。When the opening degree of the throttle valve 15 is between the negative pressure boat 16 at the throttle/nottle valve small opening position and the negative pressure source boat 17 at the throttle valve medium opening position, first, the throttle valve is used to remove the negative pressure source boat 17 from the negative pressure source boat 17 by throttling. The negative pressure is adjusted. Then, the negative pressure in the pressure regulating chamber 23 is adjusted by the atmospheric pressure from the atmospheric air introduction hole 2 (5) and the negative pressure introduced from the negative pressure source boat 17 via the negative pressure control port 10. . This pressure is then further adjusted by the gap between the seat valve 6 and the seat valve throttle 7.
そして、その調整された負圧によってスロットルバルブ
少量開き開度位置負圧源ボート１６の負圧が導かれてい
る負圧コントロール室１の負圧を調整して負圧出力ボー
ト８の負圧とし、それによって排気還流制御装置バルブ
１１を作動させて排気還流を行なう。Then, the adjusted negative pressure adjusts the negative pressure in the negative pressure control chamber 1 to which the negative pressure of the negative pressure source boat 16 is introduced, and the negative pressure of the negative pressure output boat 8 is set as the negative pressure of the negative pressure output boat 8. , thereby operating the exhaust gas recirculation control device valve 11 to perform exhaust gas recirculation.
また、スロットルバルブ１５の開度がスロ・ノトルバル
ブ中開き開度位置負圧源ボー）１７より上になる時は、
スロットルバルブ中開き開度位置負圧源ボート１７の負
圧も高くなるので、逆止弁１８−１が付いている場合は
、逆止弁１８−１がスロットルバルブ中開き開度位置負
圧源ボート１７側へ引かれる。そのため第１図の排気還
流制御装置と同様に、負圧コントロールボート１０にス
ロットルバルブ中開き開度位置負圧源ボー）１７の負圧
が導かれ、かつ、この負圧は大気に対し常（６）
に負圧の携れを有する大気導入孔２からの負圧の洩れと
によって調整される。そして、關整後の調圧室２３内負
圧をシート弁６とシート弁絞り７の隙間によって更に調
整し、その調整された負圧によってスロットルバルブ少
量開き開度位置負圧源ボート１６の負圧が導かれている
負圧コントロール室ｌの負圧を調整する。このようにし
て負圧出力ボート８の負圧を調整し、排気還流装置バル
ブ１１を作動させて排気流を行なう。In addition, when the opening degree of the throttle valve 15 is higher than the throttle/nottle valve middle opening position (negative pressure source bow) 17,
Since the negative pressure in the throttle valve mid-open position negative pressure source boat 17 also increases, if the check valve 18-1 is installed, the check valve 18-1 becomes the throttle valve mid-open position negative pressure source. It is pulled towards the boat 17 side. Therefore, similarly to the exhaust recirculation control device shown in FIG. 6) It is adjusted by the leakage of negative pressure from the atmosphere introduction hole 2 which has negative pressure. Then, the negative pressure inside the pressure regulating chamber 23 after adjustment is further adjusted by the gap between the seat valve 6 and the seat valve throttle 7, and the adjusted negative pressure causes the throttle valve to open a small amount at the negative pressure source boat 16. Adjust the negative pressure in the negative pressure control chamber l to which the pressure is introduced. In this way, the negative pressure of the negative pressure output boat 8 is adjusted, and the exhaust gas recirculation device valve 11 is operated to perform exhaust flow.
第５図は第３図の負圧制御弁１８を用いた例イと、第１
図の負圧制御弁１８を用いない側口との負圧出力ボート
８の負圧特性につき、本発明者等の行なった実験結果を
示す説明図である。この第５図に示す様に負圧制御弁１
８を用いれば、加速及びシフトアップ加速直後の負圧の
立ち上りを大幅に改善することができる。FIG. 5 shows an example A using the negative pressure control valve 18 in FIG.
FIG. 2 is an explanatory diagram showing the results of an experiment conducted by the present inventors regarding the negative pressure characteristics of the negative pressure output boat 8 with a side port that does not use the negative pressure control valve 18 shown in the figure. As shown in FIG. 5, the negative pressure control valve 1
8, it is possible to significantly improve the rise of negative pressure immediately after acceleration and shift-up acceleration.
尚、逆上弁１８−１がない第４図のような場合は、負圧
コントロールポー１１０に導かれる負圧が席時絞り１８
−２によりて調整されているが、この場合であっても、
負圧の立ち上り特性を改善（７）
することができる。In addition, in the case shown in FIG. 4 without the reverse valve 18-1, the negative pressure led to the negative pressure control port 110 is
-2, but even in this case,
The rise characteristics of negative pressure can be improved (7).
以上説明したように本発明では、スロットルバルブ中開
き開度位置負圧源ボートと負圧コントロールボートの間
に絞りを備える負圧制御弁を介在させる構成としたため
、加速及びシフトアンプ加速直後の負圧出力ボートｌＯ
の負圧立ち上がりの応答性改善ならびに、低速と中速の
定常走行時の排気還流有無の差し解消し、かつ、絞りの
流量により常時走行時などの微小量排気還流を可能にす
る効果がある。As explained above, in the present invention, since the negative pressure control valve with a throttle is interposed between the negative pressure source boat and the negative pressure control boat in the throttle valve mid-open opening position, the Pressure boat lO
This has the effect of improving the responsiveness of the rise in negative pressure, eliminating the difference between the presence or absence of exhaust gas recirculation during steady running at low and medium speeds, and enabling a very small amount of exhaust gas recirculation during constant driving due to the flow rate of the throttle.
第１図は内燃機関の従来の排気還流制御装置のシステム
図、第２図は第１図の従来の排気還流制御装置による負
圧出力ボート８の負圧特性の説明図、第３図及び第４図
は夫々本発明の排気還流制御装置の実施例を示すシステ
ム図、゛第５図は第３図図示排気還流制御装置による負
圧出力ボート８の負圧特性の説明図である。
１６．１７・・・負圧源ボート、’ｔａ・・・負圧制御
弁、２０・・・モジュレータ。
（８）Fig. 1 is a system diagram of a conventional exhaust recirculation control device for an internal combustion engine, Fig. 2 is an explanatory diagram of the negative pressure characteristics of the negative pressure output boat 8 by the conventional exhaust recirculation control device of Fig. 1, and Figs. 4 is a system diagram showing an embodiment of the exhaust gas recirculation control device of the present invention, and FIG. 5 is an explanatory diagram of the negative pressure characteristics of the negative pressure output boat 8 by the exhaust gas recirculation control device shown in FIG. 3. 16.17... Negative pressure source boat, 'ta... Negative pressure control valve, 20... Modulator. (8)
Claims (1)
と、この制御弁へ信号負圧を出力するモ 。 シュレータと、このモジユレータへ吸気管のうちスロッ
トルバルブ中開き開度位置に発生する吸気負圧を導く通
路と、この通路途中に配設さ□れた絞りを有する負圧制
御弁とを備える排気還流□制御装置。[Claims] A control valve disposed in the middle of an exhaust gas recirculation passage to control exhaust gas recirculation, and a module that outputs a negative pressure signal to the control valve. Exhaust gas recirculation system comprising: a filter, a passage that guides the intake negative pressure generated at the middle opening position of the throttle valve in the intake pipe to the modulator, and a negative pressure control valve having a throttle disposed in the middle of this passage. □Control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57104181A JPS58220946A (en) | 1982-06-16 | 1982-06-16 | Exhaust gas recycle control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57104181A JPS58220946A (en) | 1982-06-16 | 1982-06-16 | Exhaust gas recycle control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58220946A true JPS58220946A (en) | 1983-12-22 |
Family
ID=14373827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57104181A Pending JPS58220946A (en) | 1982-06-16 | 1982-06-16 | Exhaust gas recycle control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58220946A (en) |
-
1982
- 1982-06-16 JP JP57104181A patent/JPS58220946A/en active Pending
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