JPH046717U - - Google Patents
Info
- Publication number
- JPH046717U JPH046717U JP4777690U JP4777690U JPH046717U JP H046717 U JPH046717 U JP H046717U JP 4777690 U JP4777690 U JP 4777690U JP 4777690 U JP4777690 U JP 4777690U JP H046717 U JPH046717 U JP H046717U
- Authority
- JP
- Japan
- Prior art keywords
- secondary air
- catalyst device
- stage
- air supply
- supply amount
- 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 4
- 238000000746 purification Methods 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
第１図は本考案の一実施例の全体システム図、
第２図および第３図は同実施例に係る実験結果を
示すグラフ、第４図は同実施例の特性を模式的に
示す説明図である。
２……前段触媒装置、３……後段触媒装置、４
，５……２次エア供給通路、７，８……ソレノイ
ドバルブ、９……コントロールユニツト。
Figure 1 is an overall system diagram of an embodiment of the present invention.
FIGS. 2 and 3 are graphs showing the experimental results of the same example, and FIG. 4 is an explanatory diagram schematically showing the characteristics of the same example. 2... Front stage catalytic device, 3... Back stage catalytic device, 4
, 5... Secondary air supply passage, 7, 8... Solenoid valve, 9... Control unit.
Claims (1)
において、前記触媒装置を前段と後段の２段構成
とし、前段触媒装置の入口側および後段触媒装置
の入口側に各々所定の周期で供給量を変動させな
がら２次エアを供給する２次エア供給装置を設け
るとともに、前記前段側の２次エア供給量の変動
周期を前記後段側の２次エア供給量の変動周期よ
り長くしたことを特徴とするエンジンの排気ガス
浄化装置。 In an engine that purifies exhaust gas using a catalyst device, the catalyst device has a two-stage configuration of a front stage and a rear stage, and the supply amount is varied at a predetermined period to the inlet side of the front stage catalyst device and the inlet side of the rear stage catalyst device. An engine characterized in that a secondary air supply device for supplying secondary air is provided, and a fluctuation period of the secondary air supply amount on the front stage side is made longer than a fluctuation period of the secondary air supply amount on the rear stage side. Exhaust gas purification device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4777690U JPH046717U (en) | 1990-05-07 | 1990-05-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4777690U JPH046717U (en) | 1990-05-07 | 1990-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH046717U true JPH046717U (en) | 1992-01-22 |
Family
ID=31564005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4777690U Pending JPH046717U (en) | 1990-05-07 | 1990-05-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH046717U (en) |
-
1990
- 1990-05-07 JP JP4777690U patent/JPH046717U/ja active Pending