JPS643017U - - Google Patents
Info
- Publication number
- JPS643017U JPS643017U JP9646387U JP9646387U JPS643017U JP S643017 U JPS643017 U JP S643017U JP 9646387 U JP9646387 U JP 9646387U JP 9646387 U JP9646387 U JP 9646387U JP S643017 U JPS643017 U JP S643017U
- Authority
- JP
- Japan
- Prior art keywords
- air
- control valve
- way catalyst
- fuel
- detecting
- 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 6
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 3
- 239000001301 oxygen Substances 0.000 claims 3
- 229910052760 oxygen Inorganic materials 0.000 claims 3
- 239000007789 gas Substances 0.000 claims 2
- 238000000746 purification Methods 0.000 claims 2
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
第1図はこの考案の実施例を示す構成図、第2
〜4図はそれぞれNOx,CO,HCの濃度変化
を示すグラフ、第5図は他の実施例の一部構成図
である。
1…デイーゼルエンジン、3…排気管、5…三
元触媒、6…フイルタエレメント、7…パーテイ
キユレートトラツプフイルタ、8…再燃焼室、9
…燃料制御弁、10…ノズル、12…空気制御弁
、13…導入通路、15…O2センサ、16…コ
ントローラ。
Figure 1 is a configuration diagram showing an embodiment of this invention, Figure 2
4 are graphs showing changes in concentration of NOx, CO, and HC, respectively, and FIG. 5 is a partial configuration diagram of another embodiment. DESCRIPTION OF SYMBOLS 1... Diesel engine, 3... Exhaust pipe, 5... Three-way catalyst, 6... Filter element, 7... Particulate trap filter, 8... Re-combustion chamber, 9
...Fuel control valve, 10...Nozzle, 12...Air control valve, 13...Introduction passage, 15... O2 sensor, 16...Controller.
Claims (1)
装する排気ガス浄化装置において、三元触媒の上
流側にパーテイキユレートトラツプフイルタを設
け、そのフイルタエレメントの上流に燃料制御弁
からの燃料を噴射するノズルと空気制御弁を介し
て空気を導入する空気通路とを備える再燃焼室を
形成する一方、エンジン負荷状態を検出する手段
と、三元触媒入口部の酸素濃度を検出する手段と
、エンジン高負荷運転時に酸素濃度検出値に基づ
いて上記再燃焼室での混合気を理論空燃比付近で
燃焼させるように燃料制御弁と空気制御弁の開度
をフイードバツク制御する手段とを設けたことを
特徴とするデイーゼルエンジンの排気ガス浄化装
置。 In an exhaust gas purification device in which a three-way catalyst is installed in the exhaust passage of a diesel engine, a particulate trap filter is provided upstream of the three-way catalyst, and fuel from a fuel control valve is injected upstream of the filter element. A re-combustion chamber is formed which includes a nozzle and an air passage for introducing air through an air control valve, and a means for detecting the engine load condition, a means for detecting the oxygen concentration at the inlet of the three-way catalyst, and a means for detecting the oxygen concentration at the inlet of the three-way catalyst. It is characterized by providing means for feedback controlling the opening degrees of the fuel control valve and the air control valve so that the air-fuel mixture in the re-combustion chamber is combusted near the stoichiometric air-fuel ratio based on the detected oxygen concentration value during load operation. Exhaust gas purification device for diesel engines.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9646387U JPS643017U (en) | 1987-06-23 | 1987-06-23 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9646387U JPS643017U (en) | 1987-06-23 | 1987-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS643017U true JPS643017U (en) | 1989-01-10 |
Family
ID=31321379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9646387U Pending JPS643017U (en) | 1987-06-23 | 1987-06-23 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS643017U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112008000369B4 (en) * | 2007-02-21 | 2014-09-11 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for internal combustion engine |
-
1987
- 1987-06-23 JP JP9646387U patent/JPS643017U/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112008000369B4 (en) * | 2007-02-21 | 2014-09-11 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for internal combustion engine |
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