JPH0166421U - - Google Patents
Info
- Publication number
- JPH0166421U JPH0166421U JP1987161911U JP16191187U JPH0166421U JP H0166421 U JPH0166421 U JP H0166421U JP 1987161911 U JP1987161911 U JP 1987161911U JP 16191187 U JP16191187 U JP 16191187U JP H0166421 U JPH0166421 U JP H0166421U
- Authority
- JP
- Japan
- Prior art keywords
- passage
- exhaust gas
- branch
- catalytic converter
- silencer
- 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
- 230000003197 catalytic effect Effects 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- 230000003584 silencer Effects 0.000 claims 5
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
第１図は、本考案の実施例によるエンジンの排
気ガス浄化装置を示す平面図、第２図は、上記エ
ンジンの排気ガス浄化装置における低温時（エン
ジンスタート時）の排気ガスの流れを示す模式図
、第３図は、上記エンジンの排気ガス浄化装置に
おける低温、中速域の排気ガスの流れを示す模式
図、第４図は、上記エンジンの排気ガス浄化装置
における高温、低速域の排気ガスの流れを示す模
式図、第５図は、上記エンジンの排気ガス浄化装
置における高温、中速域の排気ガスの流れを示す
模式図、第６図は、上記エンジンの排気ガス浄化
装置における高温、高速域の排気ガスの流れを示
す模式図である。
１……排気通路、３……主分岐通路、４……副
分岐通路、５……低温用触媒コンバータ、６……
高温用触媒コンバータ、９……連通路、１０……
切換弁、１１……開閉弁。
FIG. 1 is a plan view showing an engine exhaust gas purification device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing the flow of exhaust gas at low temperature (when the engine starts) in the engine exhaust gas purification device. 3 is a schematic diagram showing the flow of exhaust gas in the low temperature, medium speed range in the exhaust gas purification device of the above engine, and FIG. 4 is a schematic diagram showing the flow of exhaust gas in the high temperature, low speed region in the exhaust gas purification device of the above engine. FIG. 5 is a schematic diagram showing the flow of exhaust gas in the high temperature and medium speed range in the exhaust gas purification device of the engine, and FIG. 6 is a schematic diagram showing the flow of exhaust gas in the exhaust gas purification device of the engine at high temperature FIG. 3 is a schematic diagram showing the flow of exhaust gas in a high-speed range. 1...Exhaust passage, 3...Main branch passage, 4...Sub-branch passage, 5...Low temperature catalytic converter, 6...
High temperature catalytic converter, 9... communication passage, 10...
Switching valve, 11...Opening/closing valve.
Claims (1)
成された２つの分岐通路と、一方の分岐通路に上
流側から順に設けられた低温用触媒コンバータお
よび第１サイレンサと、他方の分岐通路に上流側
から順に設けられた高温用触媒コンバータおよび
第１サイレンサと、前記一方の分岐通路の低温用
触媒コンバータと第１サイレンサとの間と他方の
分岐通路の触媒コンバータと第２サイレンサとの
間とを連通する連通路と、前記分岐点に配置され
、前記排気通路からの排気ガスを、該排気ガスの
温度条件に応じて、前記２つの分岐通路のいずれ
か一方、あるいは両方に導く第１弁と、前記連通
路に配置され、該排気ガスの温度条件に応じて、
該連通路の開閉を行う第２弁とを備えたことを特
徴とするエンジンの排気ガス浄化装置。 Two branch passages formed by branching the exhaust passage into two at a branch point, a low temperature catalytic converter and a first silencer provided in order from the upstream side in one branch passage, and a low temperature catalytic converter and a first silencer provided in order from the upstream side in the other branch passage. A high temperature catalytic converter and a first silencer provided in this order communicate with each other between the low temperature catalytic converter and the first silencer of the one branch passage and between the catalytic converter and the second silencer of the other branch passage. a first valve disposed at the branch point and guiding exhaust gas from the exhaust passage to either one or both of the two branch passages depending on the temperature condition of the exhaust gas; arranged in the communication path, depending on the temperature conditions of the exhaust gas,
An exhaust gas purification device for an engine, comprising a second valve that opens and closes the communication passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987161911U JPH0166421U (en) | 1987-10-22 | 1987-10-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987161911U JPH0166421U (en) | 1987-10-22 | 1987-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0166421U true JPH0166421U (en) | 1989-04-27 |
Family
ID=31445263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987161911U Pending JPH0166421U (en) | 1987-10-22 | 1987-10-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0166421U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007247557A (en) * | 2006-03-16 | 2007-09-27 | Toyota Motor Corp | Start control device for internal combustion engine |
-
1987
- 1987-10-22 JP JP1987161911U patent/JPH0166421U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007247557A (en) * | 2006-03-16 | 2007-09-27 | Toyota Motor Corp | Start control device for internal combustion engine |
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