JPS6017730Y2 - Exhaust gas sampling device - Google Patents
Exhaust gas sampling deviceInfo
- Publication number
- JPS6017730Y2 JPS6017730Y2 JP9611978U JP9611978U JPS6017730Y2 JP S6017730 Y2 JPS6017730 Y2 JP S6017730Y2 JP 9611978 U JP9611978 U JP 9611978U JP 9611978 U JP9611978 U JP 9611978U JP S6017730 Y2 JPS6017730 Y2 JP S6017730Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- pressure
- regulating valve
- sampling pipe
- sampling device
- 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.)
- Expired
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Description
【考案の詳細な説明】
本考案は車両のエミッション値及び燃費等を測定するた
めの排気ガスを採取する装置に関するものである。[Detailed Description of the Invention] The present invention relates to an apparatus for collecting exhaust gas for measuring vehicle emission values, fuel efficiency, etc.
従来より、車両の排気ガスをサンプリングしてエミッシ
ョン値等を測定する機器が用いられている。2. Description of the Related Art Conventionally, devices have been used to sample vehicle exhaust gas and measure emission values and the like.
ところで、この種の機器においてエミッション値の測定
精度、再現性等を確保するためには採取すべき排気ガス
の圧力を常に大気圧状態に保つ必要があるが、排気ガス
採取装置にＣＶＳ機構を採用した場合大気圧状態になら
なくなり、上記精度、再現性が期待できなくなる。By the way, in order to ensure the measurement accuracy and reproducibility of emission values in this type of equipment, it is necessary to always maintain the pressure of the exhaust gas to be sampled at atmospheric pressure, but the CVS mechanism is used in the exhaust gas sampling device. If this happens, atmospheric pressure will not be achieved, and the above accuracy and reproducibility cannot be expected.
そこで、従来はサンプリングパイプ途中に絞り、膨張タ
ンク等を組込んで大気圧状態に近づける方法がとられて
いたが、こうした方法の場合、車両が異なる毎に各車両
の背圧特性に合せて絞り、膨張タンク等を取替えねばな
らず、測定作業の能率が低下する原因となっていた。Conventionally, the sampling pipe was throttled in the middle and an expansion tank was built in to bring it close to atmospheric pressure. , the expansion tank, etc. had to be replaced, which caused a decrease in the efficiency of measurement work.
また、上記方法の場合、車両の運転領域全体に渡って測
定圧を一定に保つことは不可能であった。Furthermore, in the case of the above method, it was impossible to maintain the measured pressure constant over the entire driving range of the vehicle.
本考案は上記従来装置の欠点を解消したもので、サンプ
リングパイプ内の静圧を圧力検出器で検出し、この検出
信号に応じてサンプリングパイプ途中に設けた圧力調整
弁を動作させることにより、常時排気ガスを適正圧力状
態で採取することができるようにしたことを特徴とする
ものである。The present invention eliminates the drawbacks of the conventional device described above.The static pressure inside the sampling pipe is detected by a pressure detector, and a pressure regulating valve installed in the middle of the sampling pipe is operated in response to this detection signal. This system is characterized by being able to collect exhaust gas at an appropriate pressure.
以下に図示の実施例につき説明すると、１はＣＶＳ型排
気ガス採取装置で、これはモータ２で駆動されるルーツ
ポンプ３と該ポンプ３の吸引側に接続されたサンプリン
グパイプ４と、該パイプ４内に希釈エアを導くエア導入
器５と、サンプリングパイプ４内の気体温度を一定値（
例えば３０℃）に保つための熱交換器５ａとから大略構
成されており、サンプリングパイプ４の吸込口を車両の
テールバイブロに接続して該パイプ４内に排気ガスを取
入れ、熱交換器５ａの出口側に分析器７を接続してサン
プルガスの分析を行なうものとなっている。To explain the illustrated embodiment below, 1 is a CVS type exhaust gas sampling device, which includes a roots pump 3 driven by a motor 2, a sampling pipe 4 connected to the suction side of the pump 3, and a sampling pipe 4 connected to the suction side of the pump 3. The air inlet 5 that introduces dilution air into the interior and the gas temperature inside the sampling pipe 4 are kept at a constant value (
For example, the sampling pipe 4 is generally composed of a heat exchanger 5a for maintaining the temperature at 30° C.), and the exhaust gas is taken into the pipe 4 by connecting the suction port of the sampling pipe 4 to the tail vibro of the vehicle. An analyzer 7 is connected to the outlet side to analyze the sample gas.
エア導入器５より上流側のサンプリングパイプ４途中に
圧力調整弁としてのバタフライバルブ８を組込み、該バ
ルブ８より上流側のパイプ４管壁に該パイプ４内の静圧
を検出する圧力検出器９を取付け、バタフライバルブ８
を、圧力検出器９で制御される駆動装置としてのサーボ
モータ１０に連動させる。A butterfly valve 8 as a pressure regulating valve is installed in the middle of the sampling pipe 4 on the upstream side of the air introduction device 5, and a pressure detector 9 is installed on the wall of the pipe 4 on the upstream side of the valve 8 to detect the static pressure inside the pipe 4. Install the butterfly valve 8.
is interlocked with a servo motor 10 as a drive device controlled by a pressure detector 9.
ここでは圧力検出器９からの検出信号は増巾器１１で増
巾されてサーボモータ１０に入力され、サーボモータ１
０ははサンプリングパイプ４内の静圧が常時零になるよ
う入力信号に応じてバタフライバルブ８を動かす。Here, the detection signal from the pressure detector 9 is amplified by an amplifier 11 and input to the servo motor 10.
0 moves the butterfly valve 8 according to the input signal so that the static pressure inside the sampling pipe 4 is always zero.
このため、車種あるいは運転状態の変化に対しても、そ
の背圧特性に応じて自動制御できる。Therefore, automatic control can be performed according to the back pressure characteristics even in response to changes in vehicle type or driving conditions.
従って、測定作業にあたり、車種の変化による部品交換
が不要となり、車両の運転領域全体にわたる測定が適正
でしかも容易に行なえるようになる。Therefore, during measurement work, there is no need to replace parts due to changes in the vehicle type, and measurements over the entire driving range of the vehicle can be performed appropriately and easily.
また、制御部品の構成も小規模・小部品点数で、従来設
備の改造を行なう場合でも大幅な改造をしなくてすみ、
しかも少額の費用ですむ。In addition, the configuration of the control parts is small and has a small number of parts, so even when modifying conventional equipment, there is no need to make major modifications.
And it costs a small amount of money.
なお、圧力調整弁としては上記の他ダイヤプラム型バル
ブ、ピストン型バルブ等であってもよ本考案は上記構成
をなすから、車両の運転状態等にかかわりなく、常時排
気ガスを適正圧力状態にして採取することができるよう
になる。In addition to the above, the pressure regulating valve may also be a diaphragm type valve, a piston type valve, etc. Since the present invention has the above structure, it is possible to maintain the exhaust gas at the appropriate pressure at all times regardless of the operating condition of the vehicle. You will be able to collect it.
従って、エミッション値等の測定値の信頼性が高まり、
再現性ある測定作業を行なうことができるようになる。Therefore, the reliability of measured values such as emission values increases,
It becomes possible to perform measurement tasks with reproducibility.
また、部品交換等の手数を要さず各種車両の排気ガス測
定を能率的に行なうことができるようになる。Furthermore, it becomes possible to efficiently measure exhaust gas from various vehicles without having to replace parts or the like.
図は本考案の一実施例を示す排気ガス採取装置の概略構
成図。
４・・・・・・サンプリングパイプ、５・・・・・・エ
ア導入器、６・・・・・・テールパイプ、８・・・・・
・圧力調整バルブ、１１・・・・・・増巾器、９・・・
・・・圧力検出器、１０・・・・・・駆動装置。The figure is a schematic configuration diagram of an exhaust gas sampling device showing an embodiment of the present invention. 4... Sampling pipe, 5... Air introducer, 6... Tail pipe, 8...
・Pressure adjustment valve, 11... Amplifier, 9...
. . . Pressure detector, 10 . . . Drive device.
Claims (1)
ガス採取装置において、前記サンプリングパイプのエア
導入器よりも上流側に圧力調整弁を設け、該圧力調整弁
の上流側に圧力検出器を設け、該圧力検出器の計測結果
に基づき圧力調整弁を動作させる制御装置と駆動装置を
前記圧力検出器と前記圧力調整弁との間に接続したこと
を特徴とする排気ガス採取装置。In an exhaust gas sampling device that samples exhaust gas through a sampling pipe, a pressure regulating valve is provided upstream of the air inlet of the sampling pipe, a pressure detector is provided upstream of the pressure regulating valve, and the pressure is detected. 1. An exhaust gas sampling device characterized in that a control device and a drive device for operating a pressure regulating valve based on measurement results of the device are connected between the pressure detector and the pressure regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9611978U JPS6017730Y2 (en) | 1978-07-12 | 1978-07-12 | Exhaust gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9611978U JPS6017730Y2 (en) | 1978-07-12 | 1978-07-12 | Exhaust gas sampling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5514863U JPS5514863U (en) | 1980-01-30 |
| JPS6017730Y2 true JPS6017730Y2 (en) | 1985-05-30 |
Family
ID=29029703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9611978U Expired JPS6017730Y2 (en) | 1978-07-12 | 1978-07-12 | Exhaust gas sampling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6017730Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5737182A (en) * | 1980-08-15 | 1982-03-01 | Hokuriku Concrete Kogyo Kk | Egg shaped pipe and its joining method |
-
1978
- 1978-07-12 JP JP9611978U patent/JPS6017730Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5514863U (en) | 1980-01-30 |
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