JPH01124025U - - Google Patents
Info
- Publication number
- JPH01124025U JPH01124025U JP1810588U JP1810588U JPH01124025U JP H01124025 U JPH01124025 U JP H01124025U JP 1810588 U JP1810588 U JP 1810588U JP 1810588 U JP1810588 U JP 1810588U JP H01124025 U JPH01124025 U JP H01124025U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- catalyst
- passage
- diagram
- exhaust passage
- 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
- 238000000746 purification Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
第１図乃至第８図はこの考案の第１の実施例に
係わり、第１図は排気浄化装置の全体構成図、第
２図ａ乃至第２図ｃは制御弁の回動位置を示す説
明図、第３図は制御弁の制御例を示す説明図、第
４図は触媒入口温度と吸入空気量とに対する触媒
転化率特性図、第５図ａ乃至ｃは排気通路中の各
点における空燃比の変動波形図、第６図は触媒入
口温度と触媒転化率との相関図、第７図は車両排
気試験における排気流量とバイパス排気の遅れと
の関係を示す説明図、第８図は車両加速時の空燃
比変動波形図、第９図は第２の実施例の排気浄化
装置の全体構成図、第１０図は第２の実施例の制
御パターン図、第１１図は第３の実施例の同全体
構成図、第１２図は第４の実施例の同構成図であ
る。
１……エンジン本体、５……フロントチユーブ
（排気通路）、９……三元触媒（排気浄化用触媒
）、２７……バイパス通路。
Figures 1 to 8 relate to the first embodiment of this invention, in which Figure 1 is an overall configuration diagram of the exhaust gas purification device, and Figures 2a to 2c are illustrations showing the rotational positions of the control valves. Fig. 3 is an explanatory diagram showing an example of control of the control valve, Fig. 4 is a catalyst conversion rate characteristic diagram with respect to catalyst inlet temperature and intake air amount, and Figs. Figure 6 is a correlation diagram between catalyst inlet temperature and catalyst conversion rate; Figure 7 is an explanatory diagram showing the relationship between exhaust flow rate and bypass exhaust delay in a vehicle exhaust test; Figure 8 is a diagram showing the relationship between exhaust flow rate and bypass exhaust delay in a vehicle exhaust test. An air-fuel ratio fluctuation waveform diagram during acceleration, FIG. 9 is an overall configuration diagram of the exhaust purification device of the second embodiment, FIG. 10 is a control pattern diagram of the second embodiment, and FIG. 11 is a diagram of the third embodiment. FIG. 12 is the same overall configuration diagram of the fourth embodiment. 1...Engine body, 5...Front tube (exhaust passage), 9...Three-way catalyst (exhaust purification catalyst), 27...Bypass passage.
Claims (1)
この触媒上流の排気通路途中に、この排気通路を
迂回するバイパス通路を設け、排気の一部を分流
後迂回させ、合流させることで空燃比の変動を抑
制するように構成したことを特徴とする排気浄化
装置。 An exhaust purification catalyst is installed in the engine exhaust passage,
A bypass passage that detours around the exhaust passage is provided in the middle of the exhaust passage upstream of the catalyst, and a part of the exhaust gas is divided, detoured, and merged, thereby suppressing fluctuations in the air-fuel ratio. Exhaust purification device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988018105U JPH0716012Y2 (en) | 1988-02-16 | 1988-02-16 | Exhaust purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988018105U JPH0716012Y2 (en) | 1988-02-16 | 1988-02-16 | Exhaust purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01124025U true JPH01124025U (en) | 1989-08-23 |
| JPH0716012Y2 JPH0716012Y2 (en) | 1995-04-12 |
Family
ID=31232447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988018105U Expired - Lifetime JPH0716012Y2 (en) | 1988-02-16 | 1988-02-16 | Exhaust purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716012Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4876316U (en) * | 1971-12-24 | 1973-09-21 | ||
| JPS6218319U (en) * | 1985-07-19 | 1987-02-03 |
-
1988
- 1988-02-16 JP JP1988018105U patent/JPH0716012Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4876316U (en) * | 1971-12-24 | 1973-09-21 | ||
| JPS6218319U (en) * | 1985-07-19 | 1987-02-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0716012Y2 (en) | 1995-04-12 |