JPH01112443U - - Google Patents
Info
- Publication number
- JPH01112443U JPH01112443U JP800388U JP800388U JPH01112443U JP H01112443 U JPH01112443 U JP H01112443U JP 800388 U JP800388 U JP 800388U JP 800388 U JP800388 U JP 800388U JP H01112443 U JPH01112443 U JP H01112443U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- sample
- orifice
- dividing
- sample probe
- 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
- 239000000523 sample Substances 0.000 claims description 17
- 238000000605 extraction Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Description
第１図は本考案の一実施例を示す排気ガスサン
プル取出し装置の一部断面概略構成図、第２図は
同上装置に用いられるオリフイスと可変手段の正
面図、第３図は同上装置に用いられるオリフイス
と可変手段の他の例を示す正面図、第４図は同上
装置に用いられるオリフイスと可変手段のさらに
他の例を示す側断面図、第５図は従来技術を示す
排気ガスサンプル取出し装置の一部断面概略構成
図である。
１０……エンジン、１２……排気管、１４……
排気デイフユーザ、１６……排気ガス分割装置、
１８……分割管、２４……サンプルプローブ、２
４Ａ……サンプルプローブ吐出口、２６……希釈
用流通管、２８，５０，５１……オリフイス、３
５……吸引ブロア、３８……排気ガス分析計、５
５……バルブ、６０……コントローラ、９０，９
１，９２……可変手段、Ｐ１……オリフイス上流
の圧力、Ｐ２……分割管下流の圧力。
Fig. 1 is a partial cross-sectional schematic diagram of an exhaust gas sample extraction device showing one embodiment of the present invention, Fig. 2 is a front view of an orifice and variable means used in the above device, and Fig. 3 is a front view of an orifice and a variable means used in the same device. 4 is a side sectional view showing still another example of the orifice and variable means used in the same device, and FIG. 5 is a diagram showing a conventional technique for extracting an exhaust gas sample. FIG. 2 is a partially cross-sectional schematic configuration diagram of the device. 10...Engine, 12...Exhaust pipe, 14...
Exhaust differential user, 16...exhaust gas splitting device,
18...Split tube, 24...Sample probe, 2
4A... Sample probe discharge port, 26... Dilution flow tube, 28, 50, 51... Orifice, 3
5... Suction blower, 38... Exhaust gas analyzer, 5
5...Valve, 60...Controller, 90,9
1,92...Variable means, P1 ...Pressure upstream of the orifice, P2 ...Pressure downstream of the split pipe.
Claims (1)
気ガスを実質的に均等な複数の流れに分割する分
割管を設け、該分割管の何れかによつてサンプル
プローブを形成し、該サンプルプローブによつて
前記排気ガス通路内の排気ガス流量に比例した少
量の排気ガスサンプルを希釈用流通管に導き、該
排気ガスを前記サンプルプローブ吐出口下流に配
置されるオリフイスを通すことにより、該希釈用
流通管上流から吸引ブロアにより強制導入される
大気と混合させて、その希釈された排気ガスのサ
ンプリングを行う排気ガスサンプル取出し装置に
おいて、前記吸引ブロアと前記サンプルプローブ
吐出口との間に大気量を調節するバルブと、前記
オリフイスの通過流量を可変にする可変手段と、
前記オリフイス上流の圧力と前記分割管下流の圧
力とを等しくさせるよう前記可変手段及び前記バ
ルブを作動させるコントローラとを設けたことを
特徴とする排気ガスサンプル取出し装置。 A dividing tube is provided in the exhaust gas passage exiting the engine to divide the exhaust gas into a plurality of substantially equal streams, one of the dividing tubes forms a sample probe, and the sample probe is formed by one of the dividing tubes. Then, a small amount of exhaust gas sample proportional to the exhaust gas flow rate in the exhaust gas passage is introduced into the dilution flow pipe, and the exhaust gas is passed through an orifice disposed downstream of the sample probe discharge port. In an exhaust gas sample extraction device that samples the diluted exhaust gas by mixing it with air forcefully introduced from upstream of a pipe by a suction blower, the amount of air is adjusted between the suction blower and the sample probe outlet. a variable means for varying the flow rate passing through the orifice;
An exhaust gas sample extraction device, comprising: a controller that operates the variable means and the valve so as to equalize the pressure upstream of the orifice and the pressure downstream of the dividing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP800388U JPH01112443U (en) | 1988-01-25 | 1988-01-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP800388U JPH01112443U (en) | 1988-01-25 | 1988-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01112443U true JPH01112443U (en) | 1989-07-28 |
Family
ID=31213494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP800388U Pending JPH01112443U (en) | 1988-01-25 | 1988-01-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01112443U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213739A (en) * | 1989-02-15 | 1990-08-24 | Hino Motors Ltd | Measuring equipment for exhaust gas |
-
1988
- 1988-01-25 JP JP800388U patent/JPH01112443U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02213739A (en) * | 1989-02-15 | 1990-08-24 | Hino Motors Ltd | Measuring equipment for exhaust gas |
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