JPH0444427U - - Google Patents
Info
- Publication number
- JPH0444427U JPH0444427U JP8605390U JP8605390U JPH0444427U JP H0444427 U JPH0444427 U JP H0444427U JP 8605390 U JP8605390 U JP 8605390U JP 8605390 U JP8605390 U JP 8605390U JP H0444427 U JPH0444427 U JP H0444427U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- passage
- throttle valve
- intake throttle
- intake
- 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 description 5
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Exhaust Gas After Treatment (AREA)
Description
第１図は本考案の実施例を示す概略構成図、第
２図はコントロールユニツトで実行される制御動
作のフローチヤート、第３図は機関トルクと回転
数に応じた排気温度と絞弁の制御領域を示す特性
図、第４図は暖機時における触媒温度と絞弁開度
の関係を示す制御特性図、第５図は触媒温度と転
化率の関係を示す特性図、第６図はソニツクノズ
ルの流量特性を前後差圧との関係に基づいて示す
特性図である。
１……デイーゼル機関本体、２……吸気通路、
３……排気通路、４……吸気絞弁、５……排気還
流通路、６……ソニツクノズル、８……酸化触媒
、１０……コントロールユニツト、１１……温度
センサ。
Fig. 1 is a schematic configuration diagram showing an embodiment of the present invention, Fig. 2 is a flowchart of control operations executed by the control unit, and Fig. 3 is control of exhaust temperature and throttle valve according to engine torque and rotation speed. Figure 4 is a control characteristic diagram showing the relationship between catalyst temperature and throttle valve opening during warm-up, Figure 5 is a characteristic diagram showing the relationship between catalyst temperature and conversion rate, and Figure 6 is a control characteristic diagram showing the relationship between catalyst temperature and conversion rate. FIG. 2 is a characteristic diagram showing the flow rate characteristics based on the relationship between the front and rear differential pressures. 1... Diesel engine body, 2... Intake passage,
3... Exhaust passage, 4... Intake throttle valve, 5... Exhaust recirculation passage, 6... Sonic nozzle, 8... Oxidation catalyst, 10... Control unit, 11... Temperature sensor.
Claims (1)
路に設置した酸化触媒と、排気通路から吸気絞弁
の下流に排気を導入する排気還流通路と、排気還
流通路に介装したソニツクノズルと、排気温度を
検出する手段と、少なくとも排気温度が所定の低
温域にあるときに吸気絞弁を絞る制御手段とを備
えたことを特徴とするデイーゼル機関の排気浄化
装置。 An intake throttle valve installed in the intake passage of the engine, an oxidation catalyst installed in the exhaust passage, an exhaust recirculation passage that introduces exhaust gas from the exhaust passage to the downstream of the intake throttle valve, a Sonic nozzle installed in the exhaust recirculation passage, 1. An exhaust gas purification device for a diesel engine, comprising means for detecting exhaust temperature and control means for throttling an intake throttle valve at least when the exhaust temperature is within a predetermined low temperature range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8605390U JPH0444427U (en) | 1990-08-15 | 1990-08-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8605390U JPH0444427U (en) | 1990-08-15 | 1990-08-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0444427U true JPH0444427U (en) | 1992-04-15 |
Family
ID=31817519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8605390U Pending JPH0444427U (en) | 1990-08-15 | 1990-08-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0444427U (en) |
-
1990
- 1990-08-15 JP JP8605390U patent/JPH0444427U/ja active Pending
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