JPS63168209U - - Google Patents
Info
- Publication number
- JPS63168209U JPS63168209U JP6088187U JP6088187U JPS63168209U JP S63168209 U JPS63168209 U JP S63168209U JP 6088187 U JP6088187 U JP 6088187U JP 6088187 U JP6088187 U JP 6088187U JP S63168209 U JPS63168209 U JP S63168209U
- Authority
- JP
- Japan
- Prior art keywords
- clogging
- secondary air
- catalyst
- detection means
- exhaust purification
- 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.)
- Granted
Links
- 239000003054 catalyst Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
第１図は本考案の一実施例における排気浄化装
置を備えたエンジンの全体構成図、第２図は２次
エア制御手段の処理を説明するためのフローチヤ
ート図、第３図は触媒の温度差に対するデユーテ
イ信号の設定特性例を示す特性図、第４図は他の
デユーテイ信号の設定特性例を示す特性図である
。
１……エンジン、９……排気通路、９ａ，９ｂ
……分岐排気通路、１１，１２……触媒装置、１
５……２次エア供給通路、１５ａ，１５ｂ……分
岐２次エア供給通路、１８……エアポンプ、１９
……流量制御弁、２０……分配弁、２１……２次
エア制御手段、２２……目詰り検出手段、２３，
２４……触媒温度センサ。
Fig. 1 is an overall configuration diagram of an engine equipped with an exhaust purification device according to an embodiment of the present invention, Fig. 2 is a flow chart for explaining the processing of the secondary air control means, and Fig. 3 is a temperature diagram of the catalyst. FIG. 4 is a characteristic diagram showing an example of setting characteristics of a duty signal with respect to a difference, and FIG. 4 is a characteristic diagram showing an example of setting characteristics of another duty signal. 1...Engine, 9...Exhaust passage, 9a, 9b
... Branch exhaust passage, 11, 12 ... Catalyst device, 1
5... Secondary air supply passage, 15a, 15b... Branch secondary air supply passage, 18... Air pump, 19
...flow control valve, 20 ... distribution valve, 21 ... secondary air control means, 22 ... clogging detection means, 23,
24...Catalyst temperature sensor.
Claims (1)
を並設し、それぞれの触媒装置に２次エアを供給
するようにしたエンジンの排気浄化装置において
、両触媒装置の目詰り状態を検出する目詰り検出
手段と、上記目詰り検出手段の出力を受け、両触
媒装置の目詰り状態の差が所定値以上になつたと
き、目詰り程度の低い方の触媒装置に対する２次
エア量を増量補正する２次エア制御手段とを備え
たことを特徴とするエンジンの排気浄化装置。 In an engine exhaust purification system in which two catalyst devices whose upstream sides merge into the exhaust system are installed side by side and secondary air is supplied to each catalyst device, there is a method for detecting clogging of both catalyst devices. Upon receiving the output from the clogging detection means and the clogging detection means, when the difference between the clogging states of both catalyst devices exceeds a predetermined value, the amount of secondary air for the catalyst device with the lower degree of clogging is corrected to increase. An engine exhaust purification device comprising: secondary air control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6088187U JPH068260Y2 (en) | 1987-04-22 | 1987-04-22 | Engine exhaust purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6088187U JPH068260Y2 (en) | 1987-04-22 | 1987-04-22 | Engine exhaust purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63168209U true JPS63168209U (en) | 1988-11-01 |
| JPH068260Y2 JPH068260Y2 (en) | 1994-03-02 |
Family
ID=30893699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6088187U Expired - Lifetime JPH068260Y2 (en) | 1987-04-22 | 1987-04-22 | Engine exhaust purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH068260Y2 (en) |
-
1987
- 1987-04-22 JP JP6088187U patent/JPH068260Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH068260Y2 (en) | 1994-03-02 |