JPS62117219U - - Google Patents
Info
- Publication number
- JPS62117219U JPS62117219U JP478686U JP478686U JPS62117219U JP S62117219 U JPS62117219 U JP S62117219U JP 478686 U JP478686 U JP 478686U JP 478686 U JP478686 U JP 478686U JP S62117219 U JPS62117219 U JP S62117219U
- Authority
- JP
- Japan
- Prior art keywords
- air
- secondary air
- internal combustion
- combustion engine
- 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.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims 5
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 238000010792 warming Methods 0.000 claims 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案に係る排気ガス浄化装置の一実
施例を設けた内燃機関の概略構成図、第２図は本
実施例による機能ブロツク図、第３図はＯＴＰ増
量制御ルーチンを示すフローチヤート、第４図は
本実施例による２次空気制御ルーチンを示すフロ
ーチヤート、第５図及び第６図は本考案の他の実
施例によるそれぞれ機能ブロツク図及びエアポン
プ電磁クラツチ制御ルーチンを示すフローチヤー
トである。
１……エンジン本体、７……エアポンプ、１１
……制御装置、３１，３２，４３，４５……２次
空気供給管、３３……ＡＳＶ、４２……排気マニ
ホルド、４９……酸素センサ、５０……三元触媒
、５１……酸化触媒。
Fig. 1 is a schematic configuration diagram of an internal combustion engine equipped with an embodiment of the exhaust gas purification device according to the present invention, Fig. 2 is a functional block diagram according to this embodiment, and Fig. 3 is a flowchart showing an OTP increase control routine. , FIG. 4 is a flowchart showing a secondary air control routine according to this embodiment, and FIGS. 5 and 6 are a functional block diagram and a flowchart showing an air pump electromagnetic clutch control routine, respectively, according to other embodiments of the present invention. be. 1...Engine body, 7...Air pump, 11
... Control device, 31, 32, 43, 45 ... Secondary air supply pipe, 33 ... ASV, 42 ... Exhaust manifold, 49 ... Oxygen sensor, 50 ... Three-way catalyst, 51 ... Oxidation catalyst.
Claims (1)
う電子制御燃料噴射装置付内燃機関の排気系の上
流側に三元触媒が、下流側に酸化触媒がそれぞれ
直列に配設され、前記内燃機関の暖機前には前記
三元触媒の上流側に、暖機後には前記酸化触媒前
に２次空気を導入する排ガス浄化装置において、
前記内燃機関に供給する燃料の空燃比が理論空燃
比より濃くなつた場合に、前記各触媒の少くとも
何れか一方に導入する前記２次空気の供給を停止
する手段を設けたことを特徴とする排気ガス浄化
装置。 (2) 前記２次空気の供給を停止する手段は、こ
の２次空気供給管に設けられたエアスイツチバル
ブであることを特徴とする実用新案登録請求の範
囲第(1)項記載の排気ガス浄化装置。 (3) 前記２次空気の供給を停止する手段は、こ
の２次空気を供給するエアポンプであることを特
徴とする実用新案登録請求の範囲第(1)項記載の
排気ガス浄化装置。[Scope of Claim for Utility Model Registration] (1) An internal combustion engine with an electronically controlled fuel injection device that performs air-fuel ratio feedback control using an oxygen detector has a three-way catalyst on the upstream side and an oxidation catalyst on the downstream side of the exhaust system. In an exhaust gas purification device that is arranged in series and introduces secondary air upstream of the three-way catalyst before warming up the internal combustion engine and in front of the oxidation catalyst after warming up the internal combustion engine,
It is characterized by providing means for stopping the supply of the secondary air introduced into at least one of the catalysts when the air-fuel ratio of the fuel supplied to the internal combustion engine becomes richer than the stoichiometric air-fuel ratio. Exhaust gas purification device. (2) The exhaust gas according to claim (1) of claim 1, wherein the means for stopping the supply of secondary air is an air switch valve provided in the secondary air supply pipe. Purification device. (3) The exhaust gas purification device according to claim 1, wherein the means for stopping the supply of the secondary air is an air pump that supplies the secondary air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP478686U JPS62117219U (en) | 1986-01-17 | 1986-01-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP478686U JPS62117219U (en) | 1986-01-17 | 1986-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62117219U true JPS62117219U (en) | 1987-07-25 |
Family
ID=30785770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP478686U Pending JPS62117219U (en) | 1986-01-17 | 1986-01-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62117219U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052364B2 (en) * | 1977-06-17 | 1985-11-19 | トライナ− スケ−ル アンド マニユフアクチユアリング カンパニ− | postal scales |
-
1986
- 1986-01-17 JP JP478686U patent/JPS62117219U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052364B2 (en) * | 1977-06-17 | 1985-11-19 | トライナ− スケ−ル アンド マニユフアクチユアリング カンパニ− | postal scales |