JPS5848236B2 - How to clean powder paint transport hose - Google Patents
How to clean powder paint transport hoseInfo
- Publication number
- JPS5848236B2 JPS5848236B2 JP55108027A JP10802780A JPS5848236B2 JP S5848236 B2 JPS5848236 B2 JP S5848236B2 JP 55108027 A JP55108027 A JP 55108027A JP 10802780 A JP10802780 A JP 10802780A JP S5848236 B2 JPS5848236 B2 JP S5848236B2
- Authority
- JP
- Japan
- Prior art keywords
- hose
- cleaning
- powder paint
- flow
- air
- 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
- Cleaning In General (AREA)
Description
【発明の詳細な説明】
本発明は粉体塗料輸送ホースの内面に付着した粉体塗料
を洗浄、除去する方法に係り、特に該輸送ホース内に付
着せる溶融粉体塗料を効果的に除去して、該ホースの再
使用を可能ならしめる有効な方法を提供するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cleaning and removing powder paint adhering to the inner surface of a powder paint transport hose, and particularly to a method for effectively removing molten powder paint adhering to the inside of the transport hose. This provides an effective method for making the hose reusable.
一般に、車両の塗装などに多く採用されている静電粉体
塗装手法では、粉体塗料は圧縮空気と共に粉体塗料供給
装置から粉体塗料輸送ホースを介してスプレーガンに導
かれ、その先端ノズル部を通過するとき負の高電圧に印
加され、正電圧の被塗物に吸引付着せしめられる。In general, in the electrostatic powder coating method that is widely used for painting vehicles, powder paint is guided along with compressed air from a powder paint supply device to a spray gun via a powder paint transport hose, and the tip nozzle When passing through the section, a high negative voltage is applied, and the material is attracted and adhered to the object to be coated, which has a positive voltage.
ところで、このような手法なこ用いられる粉体塗料輸送
ホースにあっては、ホース内面に塗料との摩擦や衝撃に
よる発熱などによって所謂インパクトフユジョン（ ｉ
ｍｐａｃｔ ｆｕｓｉｏｎ ）が生起して塗料が付着（
融着）することが認められている。By the way, in powder paint transport hoses that are used in this way, so-called impact fusion (i.e.
mpact fusion) occurs and paint adheres (
fused).
そして、この付着した塗料を取り除くのに、従来はホー
ス内にシンナー等の溶剤を流し込み、長時間の浸漬によ
り付着した塗料を溶かした後、溶剤を圧縮空気で吹きと
ばす方法が考えられたが、この方法では、塗料を溶解す
る溶剤の能力に限度があるために、塗料を完全に除去す
ることは著しく困難であった。In order to remove this adhered paint, the conventional method was to pour a solvent such as thinner into a hose, dissolve the adhered paint by soaking it for a long time, and then blow off the solvent with compressed air. With this method, it is extremely difficult to completely remove the paint due to the limited ability of the solvent to dissolve the paint.
また、別の方法として、圧縮空気を用いてホース内に溶
剤を流し込み、その内面を洗浄して付着した塗料を取り
除く方式も提案されているが、これとても完全に塗料を
除去することは不可能であった。Another method proposed is to use compressed air to pour a solvent into the hose and clean the inside surface of the hose to remove the adhered paint, but this method is impossible to completely remove the paint. Met.
このように、従来のホース洗浄法は、付着した塗料の完
全除去に難点があり、且ついずれも作業性が極めて悪い
ため、実用に供されず、実際にはホースの再利用は行な
われていないのであり、使用済のホースは新品と取替え
ることが為されているのである。As described above, conventional hose cleaning methods have difficulty in completely removing adhered paint, and both have extremely poor workability, so they are not put to practical use, and hoses are not actually reused. Therefore, used hoses are replaced with new ones.
本発明は、このような事情に鑑みて為されたものであっ
て、粉体塗料輸送ホース内を極めて簡単な手段によって
効率的に洗浄し、該ホースを再度使用することが出来る
ようにすることを目的とし、その要旨とするところは、
粉体塗料輸送ホースの内面に付着した粉体塗料を洗浄、
除去する方法において、該ホースの内部にガーゼなどの
通液性編織物または網秋物を挿入し、更にその前後に、
該ホース内の流れの一部を遮る部分を備え、該流体の圧
送圧力を受けて流れの方向に移送させられるように構成
されたガイド部材をそれぞれ配置すると共に、該ホース
内に流体として所定の洗浄液を交互に逆方向に流通せし
めることにより、かかる洗浄液の流れによって前記ガイ
ド部材と共に前記通液性編織物または網状物を交互に逆
方向に該ホース内を移動させ、該ホース内面をクリーニ
ングするようにしたことにある。The present invention has been made in view of these circumstances, and it is an object of the present invention to efficiently clean the inside of a powder paint transport hose by an extremely simple means, so that the hose can be used again. The purpose is to:
Cleans powder paint adhering to the inner surface of the powder paint transport hose.
In the removal method, a liquid-permeable knitted fabric or mesh cloth such as gauze is inserted into the inside of the hose, and further, before and after that,
Guide members each having a part that blocks a part of the flow in the hose and configured to be transferred in the direction of the flow in response to the pumping pressure of the fluid are disposed, and a predetermined amount of fluid is contained in the hose. By flowing the cleaning liquid alternately in opposite directions, the flow of the cleaning liquid causes the liquid-permeable knitted fabric or net-like material to move in the hose alternately in the opposite direction together with the guide member, thereby cleaning the inner surface of the hose. It's because I did it.
以下、本発明にかかる粉体塗料輸送ホースの洗浄方法を
実施するに好適な一例を示す図面に基づいて更に詳細に
説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the method for cleaning a powder coating transport hose according to the present invention will be explained in more detail based on the drawings showing an example suitable for carrying out the method.
先ず、第１図は２個の圧送タンクを備えた洗浄装置であ
って、一次側エア１はエアレギュレータ２によって所定
の圧力（どこでは０． ５ ｋｇ／ｆｆｌ ）に設定さ
れてエアソレノイドスイッチ３に導かれる。First, FIG. 1 shows a cleaning device equipped with two pressure-feeding tanks, and the primary air 1 is set at a predetermined pressure (0.5 kg/ffl in some places) by an air regulator 2, and the air solenoid switch 3 guided by.
そして、かかるエアソレノイドスイッチ３を図示の如く
目盛（１）に合わせれば、所定圧力のエアがエアホース
４を通って圧送タンク５に導かれるようになっている。When the air solenoid switch 3 is set to the scale (1) as shown in the figure, air at a predetermined pressure is guided to the pressure tank 5 through the air hose 4.
この圧送タンク５はアセトン等の洗浄溶剤６が所定量（
ここでは約２５０ｍｌ）収容されて密封されており、底
部近くまで延びたパイプ７が蓋５ａを貫通して圧送タン
ク５の外部においてホース取付口７ａを構成している。This pressure-feeding tank 5 is filled with a predetermined amount of cleaning solvent 6 such as acetone (
Here, about 250 ml) is contained and sealed, and a pipe 7 extending to near the bottom penetrates the lid 5a and forms a hose attachment port 7a on the outside of the pressure-feeding tank 5.
一方、別の圧送タンク８には同じく底部近くまで延びた
パイプ９が蓋８ａを貫通して外部においてホース取付口
９ａを形或し、また別のエアホース１０によって圧送タ
ンク８と前記エアソレノイドスイッチ３とが接続されて
いる。On the other hand, in another pressure tank 8, a pipe 9 extending to near the bottom passes through the lid 8a to form a hose attachment port 9a on the outside, and another air hose 10 connects the pressure tank 8 and the air solenoid switch 3. are connected.
なお、図示のようにエアソレノイドスイッチ３が目盛（
Ｉ＞に合わせられている間はエアホース１０の末端は大
気中に開放（抜気）され、またエアソレノイドスイッチ
３が目捌■）に合せられれば、供給されるエアはエアホ
ース１０に通じられる一方、エアホース４が大気中に開
放（抜気）させられるように構成されている。In addition, as shown in the figure, the air solenoid switch 3 has a scale (
When the air solenoid switch 3 is set to I>, the end of the air hose 10 is opened to the atmosphere (vented), and when the air solenoid switch 3 is set to I>, the supplied air is passed through the air hose 10. , the air hose 4 is configured to be opened (vented) to the atmosphere.
また、前記ホース取付口７ａ ，９ａの間には、粉体塗
装において使用されて粉体塗料が内面に付着した、洗浄
されるべき粉体塗料輸送ホース１１が挿着されており、
そしてこのホース１１の内部には、第２図に示されるよ
うに、適切な大きさ、例えば５ｃＩｒｌ×５ｃｍ程度の
ガーゼ布１２がまるめて挿入され、更にその前後に移動
用のガイド部材１３がそれぞれ挿入されている。Further, a powder paint transport hose 11 to be cleaned, which is used in powder coating and has powder paint adhered to its inner surface, is inserted between the hose attachment ports 7a and 9a.
As shown in FIG. 2, a gauze cloth 12 of an appropriate size, for example, about 5 cIrl x 5 cm, is inserted into the inside of this hose 11 in a ball shape, and guide members 13 for movement are inserted at the front and rear of the gauze cloth 12, respectively. It has been inserted.
このガイド部材１３は、ホース内の流体の流れの一部を
遮ぎる部分を備え、流体から抵抗力を受けて流れの方向
に移送させられるように構成されている。The guide member 13 includes a portion that partially blocks the flow of fluid within the hose, and is configured to receive resistance from the fluid and be moved in the direction of the flow.
換言すれば、該ガイド部材１３は適当な断面と溶剤６が
通過する穴を有しており、該溶剤６が庄送されるとき適
当な圧力が作用するようになっているものであって、こ
の溶剤６の圧送圧力を受けたガイド部材１３にてガーゼ
布１２を押し、それをホース１１内面に接触させ、ガー
ゼ布１２、ガイド部材１３を通過する該溶剤６に乱流を
起こしながら、溶剤６の流れの方向へ移動するのである
。In other words, the guide member 13 has a suitable cross section and a hole through which the solvent 6 passes, so that an appropriate pressure is applied when the solvent 6 is transported. The gauze cloth 12 is pushed by the guide member 13 that receives the pressure of the solvent 6, and brought into contact with the inner surface of the hose 11. While causing turbulence in the solvent 6 passing through the gauze cloth 12 and the guide member 13, the solvent is It moves in the direction of the flow of 6.
そして、このように構成されている洗浄装置のエアソレ
ノイドスイッチ３を目盛（ＩＩに合せると圧送タンク５
が加圧され、アセトンがホース１１内に圧送される。Then, when the air solenoid switch 3 of the cleaning device configured in this way is set to the scale (II), the pressure feed tank 5
is pressurized, and acetone is pumped into the hose 11.
ホース１１内では、上流側のガイド部材１３が強制的に
アセトン液に押され、そして該ガイド部材１３にてガー
ゼ布１２を押しつつ下流側に移動させられる。Inside the hose 11, the upstream guide member 13 is forcibly pushed by the acetone liquid, and the gauze cloth 12 is moved downstream while being pushed by the guide member 13.
そして下流側のガイド部材１３がホース取付口９ａに当
接して停止すれば、これに続いてガーゼ布１２も上流側
のガイド部材１３も停止するが、その間ガーゼ布１２は
該ガイド部材１３による押圧作用下にホース１１の内壁
をアセトンと共に擦りつけられて移動せしめられること
によりホース１１を洗浄するのである。When the guide member 13 on the downstream side comes into contact with the hose attachment port 9a and stops, the gauze cloth 12 and the guide member 13 on the upstream side also stop, but during this time the gauze cloth 12 is pressed by the guide member 13. Under the action, the inner wall of the hose 11 is rubbed with acetone and moved, thereby cleaning the hose 11.
方の圧送タンク８にはアセトンが流入し、内部の気体は
エアホース１０を通ってエアソレノイドスイッチ３より
大気中へ放出させられる。Acetone flows into the pressure tank 8, and the gas inside is discharged into the atmosphere via the air solenoid switch 3 through the air hose 10.
ついで、エアソレノイドスイ゛ンチ３を目鉛■）に切り
替えると、圧送タンク８が加圧され、アセトンが逆向き
にホース１１内を流れるので、ガーゼ布１２は上述とは
逆にホース取付口９ａより７３に向けて移動させられ、
ホース１１内を洗浄するのであり、圧送タンク５内の空
気はエアホース４経由大気中に放出される。Next, when the air solenoid switch 3 is switched to eyelet ■), the pressure tank 8 is pressurized and the acetone flows in the hose 11 in the opposite direction, so the gauze cloth 12 is inserted into the hose attachment port 9a in the opposite direction as described above. It was moved towards 73,
The inside of the hose 11 is cleaned, and the air inside the pressure tank 5 is released into the atmosphere via the air hose 4.
そして、かかるガーゼ布１２の移動によって、ホース１
１内面に付着せる塗料は擦り取られるようになるのであ
る。By moving the gauze cloth 12, the hose 1
1. Paint that adheres to the inner surface will be rubbed off.
このように、エアソレノイドスイッチ３を交互に１，Ｉ
Ｉの切替を行ない、両圧送タンク５，８の加圧、抜気を
交互に繰り返すことによって、ガーゼ布１２を洗浄溶剤
（アセトン）と共に交互に逆方向に該ホース１１内を流
通せしめて、ホース１１内面に摺接せしめることにより
、該ホース１１の内面に付着した塗料を容易に且つ極め
て迅速に洗浄、除去することができるのである。In this way, the air solenoid switch 3 is alternately set to 1 and I.
I, and by alternately repeating the pressurization and deaeration of both the pressure feeding tanks 5 and 8, the gauze cloth 12 and the cleaning solvent (acetone) are made to alternately flow through the hose 11 in the opposite direction. By slidingly contacting the inner surface of the hose 11, paint adhering to the inner surface of the hose 11 can be easily and extremely quickly cleaned and removed.
かかる本発明の方法（Ｃ）の従来方法（Ａ，Ｅ３）に対
する優れた洗浄効果が第３図に示されている。The superior cleaning effect of the method (C) of the present invention over the conventional methods (A, E3) is shown in FIG.
第３図は、横軸にホース内を１回につきアセトン２５０
ｍｌ流通させた場合の洗浄サイクルをとり縦軸に塗料付
着量（２ｍ当りのダラム数）をとったもので、エアレギ
ュレータのエア調整圧を０．５ｋｇ／ｃｒｊとした従来
方法（４）と、２． ０ ｋｇ／ｃｆｒＬとした従来方
法化）とに対比して、本発明方脚０に従う洗浄結果を示
したものである。Figure 3 shows 250 ml of acetone per use on the horizontal axis inside the hose.
The cleaning cycle is taken when ml is circulated, and the vertical axis is the amount of paint deposited (the number of durams per 2 m).The conventional method (4) in which the air adjustment pressure of the air regulator is set to 0.5 kg/crj, 2. This figure shows the cleaning results according to method 0 of the present invention in comparison with the conventional method (method 0 kg/cfrL).
図より明らかなように、従来方法（４），（Ｂ）では２
０サイクルの洗浄操作後においても相当量の塗料付着量
を示しているのに対して、本実施例方法（Ｃ）では僅か
に３〜４サイクルで塗料付着量は急減し、略５サイクル
で最低限となることがわかる。As is clear from the figure, in conventional methods (4) and (B), 2
While a considerable amount of paint adhered even after 0 cycles of cleaning operation, in method (C) of this example, the amount of paint adhered rapidly decreased only after 3 to 4 cycles, and reached its lowest level after approximately 5 cycles. It can be seen that there is a limit.
なお、上記例示の具体例は本発明方法の実施に最も好ま
しい一例であるが、本発明はこれに何等限定されるもの
ではなく、当業者の知識に基づいて種々なる変形・改良
を加えた態様で実施し得ることは言うまでもない。Although the above-mentioned specific example is the most preferable example for implementing the method of the present invention, the present invention is not limited thereto in any way, and various modifications and improvements can be made based on the knowledge of those skilled in the art. Needless to say, it can be implemented.
例えば、ホース洗浄用のガーゼ布は入手容易なものであ
るが、これに限らず通液性のある編織物または網状物で
あれば良く、また洗浄液としては洗浄効果の大きなアセ
トンを用いたのであるが、その他の洗浄溶剤であっても
何等差支えない。For example, gauze cloth for hose cleaning is easily available, but it is not limited to this, and any fabric or net-like material that is permeable to liquid may be used, and acetone, which has a high cleaning effect, was used as the cleaning liquid. However, any other cleaning solvent may be used.
また、ガイド部材も、図示の形状に制限されるものでな
く、ホース内の流体の流れの一部を遮ぎる部分を備え、
流体から捗抗力を受けて流れの方向に強制的に移送させ
られるような形状であれば、其他の形状であっても何等
差支えないのであり、更に例示の如くガーゼ布１２の前
後に配されるガイド部材１３、１３を別体とする他、所
定の距離を隔ててそれらを−・体的に結合したものであ
っても何等差支えない。Further, the guide member is not limited to the shape shown in the drawings, and may include a portion that blocks part of the fluid flow within the hose.
Any other shape may be used as long as the shape is such that it can be forcibly transferred in the direction of flow by receiving force from the fluid, and furthermore, as shown in the example, it may be placed before and after the gauze cloth 12. In addition to using the guide members 13, 13 as separate members, there is no problem even if the guide members 13, 13 are physically connected at a predetermined distance.
以上詳述した通り、本発明に従う洗浄方法によれば、従
来完全実施が不可能であった粉体塗料輸送ホースの内面
に付着した塗料の洗浄、除去が容易に短時間に実施可能
となり、これによってかかるホースの再使用が可能とな
ったのであり、しかもホースの長さに制限されることが
ない利点がある。As detailed above, according to the cleaning method according to the present invention, it is now possible to easily and quickly clean and remove paint adhering to the inner surface of a powder paint transport hose, which was previously impossible to do completely. This makes it possible to reuse such hoses, and has the advantage of not being limited by the length of the hose.
また、装置としては圧送タンク２個とガーゼ布等の通液
性編織．物または網状物と移動用のガイド部材等を絹入
和た簡単な装置で、比較的低圧のエアで洗浄効果をあげ
ることができ、極めて経済的且つ能率的な洗浄方法と言
うことができる等の数々の利点を有しているのである。In addition, the equipment includes two pressure-feeding tanks and a liquid-permeable fabric such as gauze cloth. It is a simple device in which objects or net-like objects and a guide member for movement are mixed with silk, and the cleaning effect can be achieved with relatively low pressure air, making it an extremely economical and efficient cleaning method. It has many advantages.
第１図は本発明方法を実施するに好適な装置の一例を示
す正面説明図であり、第２図は第１図のホース内の挿入
部品を示す要部断面図である。
第３図は従来方法と本発明方法の対比における塗料洗浄
結果を示す図表である。
６：アセトン（洗浄液）、１１：ホース、１２：ガーゼ
（通液性編織物または網状物）、１３：ガイド部材。FIG. 1 is a front explanatory view showing an example of an apparatus suitable for carrying out the method of the present invention, and FIG. 2 is a sectional view of a main part showing a part inserted into the hose of FIG. 1. FIG. 3 is a chart showing the paint cleaning results in comparison between the conventional method and the method of the present invention. 6: Acetone (cleaning liquid), 11: Hose, 12: Gauze (liquid-permeable knitted fabric or net-like material), 13: Guide member.
Claims (1)
浄、除去する方法において、該ホースの内部にガーゼな
どの通液性編織物または網秋物を挿入し、更にその前後
に、該ホース内の流体の流れの一部を遮る部分を備え、
該流体の圧送圧力を受けて流れの方向に移送させられる
ように構成されたガイド部材をそれぞれ配置すると共に
、該ホース内に流体として所定の洗浄液を交互に逆方向
に流通せしめることにより、かかる洗浄液の流れによっ
て前記ガイド部材と共に前記通液性編織物または網秋物
を交互に逆方向に該ホース内を移動させ、該ホース内面
をクリーニングするようにしたことを特徴とする粉体塗
料輸送ホースの洗浄方法。1. In a method for cleaning and removing powder paint adhering to the inner surface of a powder paint transport hose, a liquid-permeable knitted fabric or mesh material such as gauze is inserted into the inside of the hose, and the inside of the hose is It has a part that blocks part of the fluid flow,
By respectively arranging guide members configured to receive the pressure of the fluid and transfer it in the direction of flow, and by causing the specified cleaning liquid to flow as a fluid in the hose alternately in opposite directions, the cleaning liquid can be removed. Cleaning of a powder paint transporting hose, characterized in that the inner surface of the hose is cleaned by moving the liquid-permeable knitted fabric or netted fabric together with the guide member in the opposite direction alternately within the hose according to the flow of the flow. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55108027A JPS5848236B2 (en) | 1980-08-05 | 1980-08-05 | How to clean powder paint transport hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55108027A JPS5848236B2 (en) | 1980-08-05 | 1980-08-05 | How to clean powder paint transport hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5732774A JPS5732774A (en) | 1982-02-22 |
| JPS5848236B2 true JPS5848236B2 (en) | 1983-10-27 |
Family
ID=14474103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55108027A Expired JPS5848236B2 (en) | 1980-08-05 | 1980-08-05 | How to clean powder paint transport hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5848236B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6086332U (en) * | 1983-11-18 | 1985-06-14 | 本間 茂子 | Acupressure substitute sheet |
| JPH0317857Y2 (en) * | 1987-12-07 | 1991-04-16 |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6131640A (en) * | 1984-07-23 | 1986-02-14 | Nippon Soken Inc | Air-fuel ratio controller |
| USRE33942E (en) * | 1985-02-22 | 1992-06-02 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system in internal combustion engine |
| US4739614A (en) * | 1985-02-22 | 1988-04-26 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system in internal combustion engine |
| JPH066913B2 (en) * | 1985-02-23 | 1994-01-26 | トヨタ自動車株式会社 | Air-fuel ratio controller for internal combustion engine |
| US4729219A (en) * | 1985-04-03 | 1988-03-08 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved response characteristics |
| US4745741A (en) * | 1985-04-04 | 1988-05-24 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved response characteristics |
| JPH07113336B2 (en) * | 1985-04-09 | 1995-12-06 | トヨタ自動車株式会社 | Air-fuel ratio controller for internal combustion engine |
| US4693076A (en) * | 1985-04-09 | 1987-09-15 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved response characteristics |
| JPH0639930B2 (en) * | 1985-04-12 | 1994-05-25 | トヨタ自動車株式会社 | Air-fuel ratio controller for internal combustion engine |
| US4707984A (en) * | 1985-04-15 | 1987-11-24 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved response characteristics |
| CA1268529A (en) * | 1985-07-31 | 1990-05-01 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system carrying out learning control operation |
| US4723408A (en) * | 1985-09-10 | 1988-02-09 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system carrying out learning control operation |
| JPS6260941A (en) * | 1985-09-10 | 1987-03-17 | Toyota Motor Corp | Air-fuel ratio controller for internal combustion engine |
| US4707985A (en) * | 1985-09-12 | 1987-11-24 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system carrying out learning control operation |
| US4747265A (en) * | 1985-12-23 | 1988-05-31 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved exhaust emission characteristics |
| JP2570265B2 (en) * | 1986-07-26 | 1997-01-08 | トヨタ自動車株式会社 | Air-fuel ratio control device for internal combustion engine |
| US4817384A (en) * | 1986-08-13 | 1989-04-04 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved exhaust emission characteristics |
| JPH0778373B2 (en) * | 1986-10-13 | 1995-08-23 | トヨタ自動車株式会社 | Air-fuel ratio controller for internal combustion engine |
| US4840027A (en) * | 1986-10-13 | 1989-06-20 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved exhaust emission characteristics |
| JPH0726577B2 (en) * | 1986-10-13 | 1995-03-29 | トヨタ自動車株式会社 | Air-fuel ratio controller for internal combustion engine |
| JPS6397851A (en) * | 1986-10-13 | 1988-04-28 | Toyota Motor Corp | Air-fuel ratio control device for internal combustion engine |
| JPH0718366B2 (en) * | 1986-11-08 | 1995-03-06 | トヨタ自動車株式会社 | Air-fuel ratio controller for internal combustion engine |
| US4809501A (en) * | 1987-01-16 | 1989-03-07 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved exhaust emission characteristics |
| US4881368A (en) * | 1987-02-09 | 1989-11-21 | Toyota Jidosha Kabushiki Kaisha | Double air-fuel ratio sensor system having improved exhaust emission characteristics |
| US4964271A (en) * | 1987-03-06 | 1990-10-23 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback control system including at least downstream-side air-fuel ratio sensor |
| JPS6415448A (en) * | 1987-07-10 | 1989-01-19 | Toyota Motor Corp | Air-fuel ratio control device for internal combustion engine |
| JP2526591B2 (en) * | 1987-07-20 | 1996-08-21 | トヨタ自動車株式会社 | Air-fuel ratio control device for internal combustion engine |
| JP2600208B2 (en) * | 1987-10-20 | 1997-04-16 | トヨタ自動車株式会社 | Air-fuel ratio control device for internal combustion engine |
| JP3009668B2 (en) * | 1988-03-01 | 2000-02-14 | トヨタ自動車株式会社 | Air-fuel ratio control device for internal combustion engine |
| US4970858A (en) * | 1988-03-30 | 1990-11-20 | Toyota Jidosha Kabushiki Kaisha | Air-fuel ratio feedback system having improved activation determination for air-fuel ratio sensor |
| KR102041751B1 (en) * | 2019-03-15 | 2019-11-27 | 윤병석 | Apparatus and Method for Cleaning Return Duct |
-
1980
- 1980-08-05 JP JP55108027A patent/JPS5848236B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6086332U (en) * | 1983-11-18 | 1985-06-14 | 本間 茂子 | Acupressure substitute sheet |
| JPH0317857Y2 (en) * | 1987-12-07 | 1991-04-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5732774A (en) | 1982-02-22 |
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