JPH04331324A - Measuring apparatus of flow rate of exhaust gas - Google Patents
Measuring apparatus of flow rate of exhaust gasInfo
- Publication number
- JPH04331324A JPH04331324A JP3130634A JP13063491A JPH04331324A JP H04331324 A JPH04331324 A JP H04331324A JP 3130634 A JP3130634 A JP 3130634A JP 13063491 A JP13063491 A JP 13063491A JP H04331324 A JPH04331324 A JP H04331324A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- exhaust gas
- flow rate
- flow
- tracing
- 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
- 239000007789 gas Substances 0.000 claims abstract description 116
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 239000011261 inert gas Substances 0.000 claims description 7
- 230000002411 adverse Effects 0.000 abstract description 7
- 239000001307 helium Substances 0.000 abstract description 6
- 229910052734 helium Inorganic materials 0.000 abstract description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 101000582320 Homo sapiens Neurogenic differentiation factor 6 Proteins 0.000 description 1
- 102100030589 Neurogenic differentiation factor 6 Human genes 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、内燃機関やボイラなど
の燃焼機器から排出される排ガスの流量を測定する排ガ
ス流量測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas flow rate measuring device for measuring the flow rate of exhaust gas discharged from combustion equipment such as internal combustion engines and boilers.
【０００２】0002
【従来の技術】従来、例えば自動車のエンジンなどの燃
焼機器から排出される排ガスの流量（以下、排ガス流量
と云う）の測定装置として、図２に示すように、エンジ
ン２１の吸気側に接続される燃料供給路２２， 空気供
給路２３に、燃料流量計２４， 吸入空気流量計２５を
それぞれ設け、両流量計２４， ２５の出力に基づいて
排ガス流量を得るものがある。2. Description of the Related Art Conventionally, as shown in FIG. 2, a device connected to the intake side of an engine 21 has been used as a measuring device for measuring the flow rate of exhaust gas (hereinafter referred to as exhaust gas flow rate) discharged from combustion equipment such as an automobile engine. There is one in which a fuel flow meter 24 and an intake air flow meter 25 are provided in the fuel supply path 22 and air supply path 23, respectively, and the exhaust gas flow rate is obtained based on the outputs of both flow meters 24 and 25.
【０００３】0003
【発明が解決しようとする課題】しかしながら、上記従
来の排ガス流量測定装置によれば、流量計２４， ２５
をそれぞれ経由した燃料や空気がエンジン２１に対して
供給されるため、エンジン２１の性能に悪影響が及ぼさ
れることがあるほか、エンジン２１が大型化し排気量が
増大するに伴って前記流量計２４， ２５として大型の
ものを用いる必要があり、前記悪影響がより顕著になる
と共に、装置全体が大掛かりになるといった欠点がある
。[Problems to be Solved by the Invention] However, according to the above-mentioned conventional exhaust gas flow rate measuring device, the flowmeters 24, 25
Since the fuel and air are supplied to the engine 21 through the flowmeters 24 and 24, the performance of the engine 21 may be adversely affected. It is necessary to use a large-sized device as 25, which has the disadvantage that the above-mentioned adverse effects become more noticeable and the entire device becomes bulky.
【０００４】本発明は、上述の事柄に留意してなされた
もので、その目的とするところは、自動車のエンジンな
どの内燃機関やボイラなどの燃焼機器の性能に悪影響を
及ぼすことなく、極めて簡便に排ガス流量を測定できる
排ガス流量測定装置を提供することにある。The present invention has been made with the above-mentioned considerations in mind, and its purpose is to provide an extremely simple and convenient method without adversely affecting the performance of internal combustion engines such as automobile engines and combustion equipment such as boilers. An object of the present invention is to provide an exhaust gas flow rate measuring device capable of measuring exhaust gas flow rate.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
、本発明に係る排ガス流量測定装置は、燃焼機器に供給
される空気に不活性ガスをトレースガスとして供給し、
前記燃焼機器から排出される排ガス中における前記トレ
ースガスの濃度を測定し、このトレースガスの濃度と供
給時のトレースガスの流量とに基づいて前記排ガスの流
量を測定するようにしている。[Means for Solving the Problems] In order to achieve the above object, an exhaust gas flow rate measuring device according to the present invention supplies an inert gas as a trace gas to air supplied to a combustion equipment,
The concentration of the trace gas in the exhaust gas discharged from the combustion equipment is measured, and the flow rate of the exhaust gas is measured based on the concentration of the trace gas and the flow rate of the trace gas at the time of supply.
【０００６】[0006]
【作用】前記構成の排ガス流量測定装置においては、燃
焼機器に供給される空気に不活性ガスをトレースガスと
して供給しているので、このトレースガスは、燃焼機器
内において燃焼の結果発生する排ガスと十分にミキシン
グされ、エンジンの性能に悪影響が及ぼされることがな
いのは勿論のこと、エンジンの周辺に大きな改造や装置
の取付けが不要になるから、排ガス流量を極めて簡易に
かつ安価に測定することができる。[Operation] In the exhaust gas flow measuring device having the above configuration, an inert gas is supplied as a trace gas to the air supplied to the combustion equipment, so this trace gas is not the exhaust gas generated as a result of combustion in the combustion equipment. Not only is it thoroughly mixed and does not adversely affect engine performance, but it also eliminates the need for major modifications or installation of equipment around the engine, making it extremely easy and inexpensive to measure exhaust gas flow. Can be done.
【０００７】[0007]
【実施例】以下、本発明の一実施例を図面を参照しなが
ら説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【０００８】図１は、本発明に係る排ガス流量測定装置
の構成の概略を示す図で、この図において、１は例えば
燃焼機器の一例としての自動車のエンジンで、その吸気
側（上流側）には、空気を導入するための空気供給路２
が接続されると共に、燃料供給流路３が接続され、排気
側（下流側）には、燃焼によって生じた排ガスＥＸが排
出される排ガス流路４が接続されている。FIG. 1 is a diagram schematically showing the configuration of an exhaust gas flow rate measuring device according to the present invention. In this diagram, reference numeral 1 denotes an automobile engine as an example of combustion equipment, and there is an engine on the intake side (upstream side) of the engine. is air supply path 2 for introducing air
is connected to the fuel supply passage 3, and an exhaust gas passage 4 through which exhaust gas EX generated by combustion is discharged is connected to the exhaust side (downstream side).
【０００９】前記空気供給路２には、エンジン１の吸気
側に不活性ガスをトレースガスｇとして供給するトレー
スガス供給路５が接続されている。このトレースガス供
給路５には、その上流側から、図外のトレースガス供給
源から供給されるトレースガスｇの圧力を調整するレギ
ュレータ６、トレースガスｇの圧力，温度をそれぞれ検
出し、圧力信号Ｐ，温度信号Ｔをそれぞれ出力する圧力
計７，温度計８、流量制御装置としてのクリチカルフロ
ーベンチュリ（以下、ＣＦＶと云う）９がこの順に介装
されている。なお、前記トレースガス供給路５は、空気
供給路２の空気取入口（図外）など空気供給路２に接続
してあってもよい。A trace gas supply passage 5 is connected to the air supply passage 2 for supplying an inert gas as a trace gas g to the intake side of the engine 1. The trace gas supply path 5 includes, from its upstream side, a regulator 6 that adjusts the pressure of the trace gas g supplied from a trace gas supply source (not shown), a regulator 6 that detects the pressure and temperature of the trace gas g, and outputs a pressure signal. A pressure gauge 7, a thermometer 8, and a critical flow venturi (hereinafter referred to as CFV) 9 as a flow rate control device are installed in this order. Note that the trace gas supply path 5 may be connected to the air supply path 2 such as an air intake port (not shown) of the air supply path 2.
【００１０】前記トレースガスｇとして不活性ガスを用
いる理由は、後述するトレースガス分析計１３において
排ガスＥＧ中に含まれるトレースガスｇの濃度を測定す
るには、トレースガスｇがエンジン１内の燃焼によって
も化学変化をしないガスであることが必要であるからで
ある。The reason why an inert gas is used as the trace gas g is that in order to measure the concentration of the trace gas g contained in the exhaust gas EG in the trace gas analyzer 13, which will be described later, the trace gas g must be This is because it is necessary that the gas undergoes no chemical changes.
【００１１】そして、このような不活性ガスとして、ア
ルゴン、ヘリウム、ネオン、キセノンなどがある。しか
し、ネオン、キセノンは高価であり、余り適当ではない
。また、アルゴンは安価であり手軽に入手できるが、空
気中に ０．１％程度含まれるところから、これを用い
るときは、トレースガス分析計１３から出力されるトレ
ースガスｇの濃度信号Ｃｇ （後述する）の補正を行う
必要がある。そこで、この実施例においては、比較的安
価かつ手軽に入手できるヘリウムを用いている。[0011] Examples of such an inert gas include argon, helium, neon, and xenon. However, neon and xenon are expensive and not very suitable. Furthermore, although argon is cheap and easily available, it is contained in the air at about 0.1%, so when using it, the concentration signal Cg of trace gas g output from the trace gas analyzer 13 (described later It is necessary to make corrections for Therefore, in this embodiment, helium, which is relatively inexpensive and easily available, is used.
【００１２】前記排ガス流路４には、この流路４を流れ
る排ガスＥＧの一部を採取する分岐流路１０が接続され
ている。この分岐流路１０には、その上流側から、排ガ
スＥＧ中に含まれるカーボンなど異物を除去するフィル
タ１１、吸引ポンプ１２、例えばマススペクトロメータ
などのトレースガス分析計１３がこの順に介装されてお
り、トレースガス分析計１３は排ガスＥＧ中に含まれる
トレースガスｇの濃度を測定し、トレースガスｇの濃度
信号Ｃｇ を出力するように構成されている。[0012] The exhaust gas flow path 4 is connected to a branch flow path 10 that collects a portion of the exhaust gas EG flowing through the flow path 4. In this branch flow path 10, a filter 11 for removing foreign substances such as carbon contained in the exhaust gas EG, a suction pump 12, and a trace gas analyzer 13 such as a mass spectrometer are installed in this order from the upstream side. The trace gas analyzer 13 is configured to measure the concentration of the trace gas g contained in the exhaust gas EG and output a concentration signal Cg of the trace gas g.
【００１３】１４はＣＰＵなどの演算部で、前記トレー
スガス分析計１３からの濃度信号Ｃｇ および前記エン
ジン１の吸引側の空気供給路２に供給されるトレースガ
スｇの供給量Ｑｇ とを用いて、前記排ガスＥＸの流量
（排ガス流量）ＱＥＸを求めるものであり、そのときの
計算式は次の通りである。Reference numeral 14 denotes a calculation unit such as a CPU, which uses the concentration signal Cg from the trace gas analyzer 13 and the supply amount Qg of the trace gas g supplied to the air supply path 2 on the suction side of the engine 1. , the flow rate of the exhaust gas EX (exhaust gas flow rate) QEX is determined, and the calculation formula at that time is as follows.
【００１４】[0014]
【数１】[Math 1]
【００１５】そして、この実施例においては、トレース
ガスｇの流量設定装置としてＣＦＶ９を用いているから
、前記トレースガスｇの供給量Ｑｇ は、ＣＦＶ９の流
量計数をＣとするとき、Ｑｇ は次式で与えられる。In this embodiment, since the CFV 9 is used as a flow rate setting device for the trace gas g, the supply amount Qg of the trace gas g is calculated by the following formula, where C is the flow rate count of the CFV 9. is given by
【００１６】[0016]
【数２】[Math 2]
【００１７】従って、前記演算部１４にＣＦＶ８の流量
計数Ｃを予め入力しておくと共に、トレースガス分析計
１３からの濃度信号Ｃｇ 、圧力計７からの圧力信号Ｐ
，温度計８からの温度信号Ｔをそれぞれ演算部１４に入
力し、前記２式を用いて演算を行うことにより、排ガス
流量ＱＥＸを求めることができる。Therefore, the flow rate count C of the CFV 8 is input in advance to the calculation section 14, and the concentration signal Cg from the trace gas analyzer 13 and the pressure signal P from the pressure gauge 7 are input in advance.
, the temperature signal T from the thermometer 8 is inputted to the calculation section 14, and the exhaust gas flow rate QEX can be determined by performing calculation using the above two equations.
【００１８】而して、上記構成の排ガス流量測定装置に
おいて、空気が供給されるエンジン１の吸気側に対して
、トレースガス供給路５を介してヘリウムをトレースガ
スｇとして例えば １００ ｐｐｍ程度供給する。この
場合、トレースガスｇがトレースガス供給路５を通過す
る際、圧力計７， 温度計８によって圧力， 温度がそ
れぞれ検出され、そのときの圧力信号Ｐ，温度信号Ｔが
それぞれ演算部１４に入力される。In the exhaust gas flow rate measurement device having the above configuration, helium is supplied as a trace gas g to the intake side of the engine 1 to which air is supplied, for example, at about 100 ppm via the trace gas supply path 5. . In this case, when the trace gas g passes through the trace gas supply path 5, the pressure and temperature are detected by the pressure gauge 7 and the thermometer 8, respectively, and the pressure signal P and temperature signal T at that time are respectively input to the calculation unit 14. be done.
【００１９】そして、エンジン１内においては、空気と
燃料との混合ガスが燃焼し、これによって排ガスＥＧ（
燃焼ガス）が生ずるが、前記トレースガスｇは、エンジ
ン１内において排ガスＥＧと十分にミキシングされ、排
ガスＥＧとトレースガスｇが十分にミキシングされた状
態で排ガス流路４に排出される。排ガス流路４に排出さ
れたトレースガスｇを含む排ガスＥＧの大部分はそのま
ま排出されるが、他の一部は分岐流路１０に導入され、
トレースガス分析計１３に導かれて、排ガスＥＧ中に含
まれるトレースガスｇの濃度が測定され、このときの濃
度信号Ｃｇ は演算部１３に入力される。[0019] In the engine 1, a mixture of air and fuel is combusted, and as a result, the exhaust gas EG (
The trace gas g is sufficiently mixed with the exhaust gas EG in the engine 1, and the exhaust gas EG and trace gas g are discharged into the exhaust gas passage 4 in a sufficiently mixed state. Most of the exhaust gas EG containing the trace gas g discharged into the exhaust gas flow path 4 is discharged as is, but the other part is introduced into the branch flow path 10,
The trace gas analyzer 13 measures the concentration of the trace gas g contained in the exhaust gas EG, and the concentration signal Cg at this time is input to the calculation unit 13.
【００２０】そして、演算部１４においては、上記ＣＦ
Ｖ８の流量計数Ｃ、トレースガスｇの濃度信号Ｃｇ 、
トレースガスｇの圧力信号Ｐ，温度信号Ｔを用い、前記
２式によって排ガス流量ＱＥＸが求められる。[0020] Then, in the arithmetic unit 14, the above CF
V8 flow rate count C, trace gas g concentration signal Cg,
Using the pressure signal P and temperature signal T of the trace gas g, the exhaust gas flow rate QEX is determined by the above two equations.
【００２１】ところで、上記実施例において、トレース
ガス分析計１３におけるトレースガスｇの検出感度が低
い場合には、トレースガスｇの供給量を適宜増やせばよ
いが、このようにすると、エンジン１における燃焼条件
が変化する可能性がある。そこで、トレースガスｇを燃
焼に用いられる空気と同じ割合になるように、例えばト
レースガスｇとしてヘリウムを用いる場合、ヘリウムを
約７９％、酸素を約２１％になるように混合した酸素ベ
ースのトレースガスを用いることが望ましい。By the way, in the above embodiment, if the detection sensitivity of the trace gas g in the trace gas analyzer 13 is low, the supply amount of the trace gas g may be increased as appropriate. Conditions may change. Therefore, when using helium as the trace gas g, for example, an oxygen-based trace mixture of about 79% helium and about 21% oxygen is used so that the trace gas g has the same proportion as the air used for combustion. It is preferable to use gas.
【００２２】本発明は、上記実施例に限られるものでは
なく、前記ＣＦＶ９に代えて、キャピラリやマスフロー
コントローラをトレースガス供給路５に設けてもよい。The present invention is not limited to the above embodiment, and instead of the CFV 9, a capillary or a mass flow controller may be provided in the trace gas supply path 5.
【００２３】[0023]
【発明の効果】以上説明したように、本発明の排ガス流
量測定装置においては、燃焼機器に供給される空気に不
活性ガスをトレースガスとして供給しているので、この
トレースガスは、燃焼機器内において燃焼の結果発生す
る排ガスと十分にミキシングされ、燃焼機器の性能に悪
影響が及ぼされることがないのは勿論のこと、燃焼機器
の周辺に大きな改造や装置の取付けが不要であるから、
排ガス流量を極めて簡易に測定することができ、安価で
ある。そして、本発明に係る排ガス流量測定装置は、自
動車の他、船舶など大型の燃焼機器から排出される排ガ
スの流量を測定するのに好適である。Effects of the Invention As explained above, in the exhaust gas flow rate measurement device of the present invention, inert gas is supplied as a trace gas to the air supplied to the combustion equipment. Not only does it mix well with the exhaust gas generated as a result of combustion, and does not adversely affect the performance of the combustion equipment, but it also does not require major modifications or installation of equipment around the combustion equipment.
The exhaust gas flow rate can be measured extremely easily and is inexpensive. The exhaust gas flow measuring device according to the present invention is suitable for measuring the flow rate of exhaust gas discharged from large-scale combustion equipment such as ships as well as automobiles.
【図１】本発明に係る排ガス流量測定装置の一構成例を
概略的に示す図である。FIG. 1 is a diagram schematically showing a configuration example of an exhaust gas flow rate measuring device according to the present invention.
【図２】従来技術を説明するための図である。FIG. 2 is a diagram for explaining a prior art.
１…エンジン、ｇ…トレースガス、ＥＧ…排ガス、Ｑｇ
…トレースガスの流量、ＱＥＧ…排ガスの流量。1...engine, g...trace gas, EG...exhaust gas, Qg
...Flow rate of trace gas, QEG...Flow rate of exhaust gas.
Claims (1)
スをトレースガスとして供給し、前記燃焼機器から排出
される排ガス中における前記トレースガスの濃度を測定
し、このトレースガスの濃度と供給時のトレースガスの
流量とに基づいて前記排ガスの流量を測定するようにし
たことを特徴とする排ガス流量測定装置。1. Supplying an inert gas as a trace gas to air supplied to a combustion device, measuring the concentration of the trace gas in exhaust gas discharged from the combustion device, and determining the concentration of the trace gas and the time of supply. An exhaust gas flow rate measuring device, characterized in that the flow rate of the exhaust gas is measured based on the flow rate of the trace gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3130634A JP3058479B2 (en) | 1991-05-03 | 1991-05-03 | Exhaust gas flow measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3130634A JP3058479B2 (en) | 1991-05-03 | 1991-05-03 | Exhaust gas flow measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04331324A true JPH04331324A (en) | 1992-11-19 |
| JP3058479B2 JP3058479B2 (en) | 2000-07-04 |
Family
ID=15038943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3130634A Expired - Fee Related JP3058479B2 (en) | 1991-05-03 | 1991-05-03 | Exhaust gas flow measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3058479B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0792049A (en) * | 1993-09-21 | 1995-04-07 | Sekiyu Kodan | Leak detecting device for pipe fitting |
| JP2016040536A (en) * | 2014-08-12 | 2016-03-24 | 株式会社堀場製作所 | Exhaust gas analysis system |
| CN112945327A (en) * | 2021-05-13 | 2021-06-11 | 西安多普多信息科技有限公司 | Mass flow detection method, device and system |
-
1991
- 1991-05-03 JP JP3130634A patent/JP3058479B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0792049A (en) * | 1993-09-21 | 1995-04-07 | Sekiyu Kodan | Leak detecting device for pipe fitting |
| JP2016040536A (en) * | 2014-08-12 | 2016-03-24 | 株式会社堀場製作所 | Exhaust gas analysis system |
| CN112945327A (en) * | 2021-05-13 | 2021-06-11 | 西安多普多信息科技有限公司 | Mass flow detection method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3058479B2 (en) | 2000-07-04 |
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