JPH0442239U - - Google Patents
Info
- Publication number
- JPH0442239U JPH0442239U JP8361990U JP8361990U JPH0442239U JP H0442239 U JPH0442239 U JP H0442239U JP 8361990 U JP8361990 U JP 8361990U JP 8361990 U JP8361990 U JP 8361990U JP H0442239 U JPH0442239 U JP H0442239U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- upstream
- container
- downstream
- 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
- 239000000446 fuel Substances 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims 2
- 238000009423 ventilation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の一実施例の構成を示す図、第
２図Ａは同上実施例に使用される三元触媒の平面
図、同図Ｂは同図ＡのＢ−Ｂ断面図、第３図、第
４図は同じく制御ルーチンをしめすフローチヤー
トである。
１１……内燃機関、１６……コントロールユニ
ツト、１８……排気通路、１９……第１の空燃比
センサ、２０……三元触媒、２１……第２の空燃
比センサ、３３……触媒容器、３３Ａ……上流側
容器部、３３Ｂ……下流側容器部、３３Ｃ……中
間部、３４……モノリス型触媒（上流側）、３５
……モノリス型触媒（下流側）、３６……中空管
、３６ａ……通気孔。
FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, FIG. 2A is a plan view of a three-way catalyst used in the above embodiment, FIG. 3 and 4 are flowcharts similarly showing the control routine. DESCRIPTION OF SYMBOLS 11... Internal combustion engine, 16... Control unit, 18... Exhaust passage, 19... First air-fuel ratio sensor, 20... Three-way catalyst, 21... Second air-fuel ratio sensor, 33... Catalyst container , 33A...Upstream container part, 33B...Downstream container part, 33C...Intermediate part, 34...Monolith type catalyst (upstream side), 35
...Monolith type catalyst (downstream side), 36...Hollow tube, 36a...Vent hole.
Claims (1)
流側及び下流側に夫々空燃比によつて変化する排
気中特定気体成分の濃度に感応して出力値が変化
する第１及び第２の空燃比センサを設け、これら
第１及び第２の空燃比センサの出力値に応じて空
燃比を制御してなる内燃機関の空燃比制御装置に
おいて、触媒容器を分割して形成された上流側容
器部と下流側容器部とにそれぞれ排気浄化触媒を
収納すると共に、該上流側容器部と下流側容器部
との間の中間部に前記第２の空燃比センサを装着
し、かつ、該中間部断面中心付近に多数の通気孔
を形成した中空管を臨ませ、該中空管を介して採
り入れた排気を前記第２の空燃比センサに接触さ
せる構成としてことを特徴とする内燃機関の空燃
比制御装置。 First and second air-fuel ratios whose output values change in response to the concentration of a specific gas component in the exhaust gas, which changes depending on the air-fuel ratio, respectively, on the upstream and downstream sides of an exhaust purification catalyst provided in the exhaust passage of the engine. In an air-fuel ratio control device for an internal combustion engine that includes a sensor and controls the air-fuel ratio according to the output values of the first and second air-fuel ratio sensors, an upstream container portion formed by dividing a catalyst container; An exhaust purification catalyst is housed in each of the downstream container portions, and the second air-fuel ratio sensor is installed in an intermediate portion between the upstream container portion and the downstream container portion, and the cross-sectional center of the intermediate portion is Air-fuel ratio control for an internal combustion engine, characterized in that a hollow tube with a large number of ventilation holes is exposed nearby, and the exhaust gas taken in through the hollow tube is brought into contact with the second air-fuel ratio sensor. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8361990U JPH0442239U (en) | 1990-08-09 | 1990-08-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8361990U JPH0442239U (en) | 1990-08-09 | 1990-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0442239U true JPH0442239U (en) | 1992-04-09 |
Family
ID=31631436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8361990U Pending JPH0442239U (en) | 1990-08-09 | 1990-08-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002161778A (en) * | 2000-11-28 | 2002-06-07 | Tokyo Roki Co Ltd | O2 sensor mounting structure for catalytic converter |
-
1990
- 1990-08-09 JP JP8361990U patent/JPH0442239U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002161778A (en) * | 2000-11-28 | 2002-06-07 | Tokyo Roki Co Ltd | O2 sensor mounting structure for catalytic converter |