JPH0465672A - Method and instrument for measuring air mixture amount in engine oil - Google Patents
Method and instrument for measuring air mixture amount in engine oilInfo
- Publication number
- JPH0465672A JPH0465672A JP17645890A JP17645890A JPH0465672A JP H0465672 A JPH0465672 A JP H0465672A JP 17645890 A JP17645890 A JP 17645890A JP 17645890 A JP17645890 A JP 17645890A JP H0465672 A JPH0465672 A JP H0465672A
- Authority
- JP
- Japan
- Prior art keywords
- engine oil
- oil
- engine
- pressure
- predetermined pressure
- 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
- 239000010705 motor oil Substances 0.000 title claims description 62
- 238000000034 method Methods 0.000 title description 6
- 239000000203 mixture Substances 0.000 title description 2
- 239000003921 oil Substances 0.000 claims description 33
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 12
- 101150006573 PAN1 gene Proteins 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、エンジンオイル中の空隼混入量を測定する
測定方法及び測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a measuring method and a measuring device for measuring the amount of airborne particles mixed in engine oil.
〔従来の技術ｊ
従来の技術によるエンジンオイル中の空気混入量を測定
する測定方法は、オイルパン１からポンプ２により吸上
げられたエンジンオイルがエンジンオイル管路３を介し
てエンジンＥの各部を潤滑して再びオイルパン１に戻さ
れる回路におけるポンプ２の吐出側のＡ点でエンジンオ
イル管路３から分岐し、且つ開閉弁２１が設けられた分
岐管２２の開口端に計量容器２３を設置する。それから
、開閉弁２１の開閉操３作により分岐管２２から流出す
る空気混入のエンジンオイルを計！容、器２３によ１．
？所定竺（体積）Ｖｌだけ受ける。[Prior art j] The method of measuring the amount of air mixed in engine oil according to the conventional technology is that engine oil sucked up from an oil pan 1 by a pump 2 passes through engine oil pipes 3 to various parts of the engine E. A measuring container 23 is installed at the open end of a branch pipe 22 that branches from the engine oil pipe line 3 at point A on the discharge side of the pump 2 in the circuit that is lubricated and returned to the oil pan 1 and is provided with an on-off valve 21. do. Then, measure the engine oil mixed with air flowing out from the branch pipe 22 by opening and closing the on-off valve 21! Container, container 23 1.
? Only a predetermined volume (volume) Vl is received.
ツレカラそのエンジンオイルを適宜の時間、放置してお
き、混入空気が放出された後で、エンジンオイルの体積
ｖ２を計測し、Ｖ １− Ｖ ２ ＝ Ｖ ａをもって
、体積ｖ２のエンジンオイルに対する混入空気の量とす
るのである。Leave the engine oil for a suitable period of time, and after the entrained air is released, measure the volume v2 of the engine oil, and use V 1 - V 2 = Va as the entrained air for the volume v2 of the engine oil. The amount of
従来の技術によるエンジンオイル中の空気混入量を測定
する測定方法は、計量のために採取した空気混入のエン
ジンオイルを混入空気が完全に放出し切るまでの長い放
置時間が必要である。The conventional measuring method for measuring the amount of air mixed in engine oil requires a long period of time for the air mixed in the engine oil sampled for measurement to be completely released.
そして、使用中のエンジンオイルから計量のために採取
した量のエンジンオイルを採取後、オイルパンに補充し
なければならない。After collecting the amount of engine oil for measurement from the engine oil in use, the oil pan must be replenished.
この発明は、従来の技術の上記のような問題を解消した
ものである。This invention solves the above-mentioned problems of the conventional technology.
この発明によるエンジンオイル空気混入量測定装置は、
オイルパンからポンプにより吸上げられたエンジンオイ
ルがエンジンの各部を潤滑して再びオイルパンに戻され
る循環路から分岐してオイルパンに戻る分岐路が設けら
れ、前記分岐路中に適宜の箇所において所定圧をエンジ
ンオイルに与える圧力設定器が設けられると共に、他の
箇所において前記所定圧と異なる所定圧をエンジンオイ
ルに与える別の圧力設定器が設けられ、夫々の前記所定
圧下のエンジンオイルの積算流量及び圧力を計測する計
測器が夫々備えられている。The engine oil aeration amount measuring device according to this invention has the following features:
A branch path is provided in which the engine oil sucked up by the pump from the oil pan lubricates various parts of the engine and returns to the oil pan, branching off from the circulation path and returning to the oil pan. A pressure setting device is provided for applying a predetermined pressure to the engine oil, and another pressure setting device is provided for applying a predetermined pressure to the engine oil that is different from the predetermined pressure at another location, and the integration of the engine oil under each of the predetermined pressures is Measuring instruments for measuring flow rate and pressure are respectively provided.
上記のエンジンオイル空気混入量測定装置により、オイ
ルパンからポンプにより吸上げられたエンジンオイルが
エンジンの各部を潤滑して再びオイルパンに戻される循
環路から分岐してオイルパンに戻る分岐路中の適宜箇所
においてエンジンオイルに所定圧を与えると共に、他の
箇所において前記所定圧と異なる所定圧を与え、夫々の
所定圧下にあるエンジンオイルの積算流量を同時に計測
する。The above-mentioned engine oil air mixture measurement device detects the amount of engine oil sucked up by the pump from the oil pan, lubricates various parts of the engine, and then returns to the oil pan. A predetermined pressure is applied to the engine oil at appropriate locations, a predetermined pressure different from the predetermined pressure is applied to other locations, and the cumulative flow rate of the engine oil under each predetermined pressure is measured simultaneously.
分岐路中を流れるエンジンオイルには、空気が混入され
ているので、圧力が変化すると、空気分の体積に変化が
生じ、その結果、体積流量にも変化が生じる。Since air is mixed in the engine oil flowing through the branch passage, when the pressure changes, the volume of the air component changes, and as a result, the volumetric flow rate also changes.
そこで、異なる圧力下のエンジンオイルの積算流量と夫
々の圧力の計測値に基づいてエンジンオイル中の空気混
入量が算出される。Therefore, the amount of air mixed into the engine oil is calculated based on the cumulative flow rate of the engine oil under different pressures and the measured values of the respective pressures.
この発明の実施例におけるエンジンオイル中の空気混入
量を測定する測定方法を行う測定装置を第１図に従って
説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A measuring device for carrying out a measuring method for measuring the amount of air mixed in engine oil according to an embodiment of the present invention will be described with reference to FIG.
第１図は、エンジンＥにおける略図化したエンジンオイ
ル循環路に接続された測定装置の回路図として示されて
いる。FIG. 1 shows a circuit diagram of a measuring device connected to a schematic engine oil circuit in an engine E. FIG.
オイルパン１からポンプ２により吸上げられたエンジン
オイルがエンジンオイル管路３を介してエンジンＥの各
部を潤滑して再びオイルパン１に戻される回路における
ポンプ２の吐圧倒のＡ点でエンジンオイル管路３から分
岐してオイルパン１に戻る測定管路４が配設されている
。測定管路４中には、上流側から順次、流量制御弁５、
第１容−式一量計６、第１温度計７、第１油圧計８、高
圧倒背圧弁９、第２容積式流量計ｌＯ１第２温度計１１
、第２油圧計１２及び低圧側背圧弁１３が配設されてい
る。なお、高圧側背圧弁９の流入側をＢ点、同じく流圧
側を６点、低圧側背圧弁１３の流入側をＤ点とする。The engine oil is sucked up by the pump 2 from the oil pan 1, lubricates various parts of the engine E via the engine oil pipe line 3, and is returned to the oil pan 1 again.At point A of the discharge force of the pump 2, the engine oil A measuring pipe 4 is provided which branches from the pipe 3 and returns to the oil pan 1. In the measurement pipe 4, sequentially from the upstream side, flow control valves 5,
First volumetric meter 6, first thermometer 7, first oil pressure gauge 8, high overwhelm back pressure valve 9, second volumetric flow meter 1O1, second thermometer 11
, a second oil pressure gauge 12 and a low pressure side back pressure valve 13 are provided. Note that the inflow side of the high pressure side back pressure valve 9 is designated as point B, the flow pressure side is similarly designated as 6 points, and the inflow side of the low pressure side back pressure valve 13 is designated as point D.
そして、第１容積式流量計６及び第２容積式流量計ｌＯ
に対しては、遠隔制御装置１４により積算流量計測の開
始・停止指令が入力されようになっている。Then, the first positive displacement flowmeter 6 and the second positive displacement flowmeter lO
The remote control device 14 inputs commands to start and stop integrated flow rate measurement.
エンジンＥの各部を潤滑して再びオイルパン１に戻され
て循環するオイルパン１中のエンジンオイルには空気が
混入している。Air is mixed in the engine oil in the oil pan 1, which lubricates various parts of the engine E and is returned to the oil pan 1 for circulation.
その空気が混入しているエンジンオイルは、Ａ点から測
定管路４に分流され、測定管路４においても再びオイル
パン１に流出する。その分流量は。The engine oil mixed with the air is branched from point A to the measurement pipe 4, and flows out from the measurement pipe 4 to the oil pan 1 again. What is the flow rate?
流量制御弁５により所定値に設定される。It is set to a predetermined value by the flow rate control valve 5.
Ａ点からオイルパン１まで測定管路４中を流れるエンジ
ンオイルについて、Ａ点とＢ点との間におけるエンジン
オイルの圧力は、高圧側背圧弁９により設定され、６点
とＤ点との間におけるエンジンオイルの圧力は、低圧側
背圧弁１３により設定される。Regarding the engine oil flowing in the measurement pipe 4 from point A to the oil pan 1, the pressure of the engine oil between point A and point B is set by the high pressure side back pressure valve 9, and the pressure of engine oil between point A and point B is set by the high pressure side back pressure valve 9. The pressure of the engine oil at is set by the low pressure side back pressure valve 13.
そこで、Ａ点・Ｂ点間におけるエンジンオイルの流量Ｖ
ｈｄが第１流量計６により、６点・Ｄ点間におけるエン
ジンオイルの流量Ｖｌｄが第２流量計１０より夫々測定
されるのであるが、遠隔制御装置１４からの作動指令に
従って第１流量計６及び第２流量計ｌＯの計量開始・停
止が同時に行われ、同一時点の両箇所における積算流量
が計測される。Therefore, the flow rate V of engine oil between points A and B
hd is measured by the first flowmeter 6, and the flow rate Vld of the engine oil between point 6 and point D is measured by the second flowmeter 10, respectively. The measurement start and stop of the second flowmeter IO are performed simultaneously, and the cumulative flow rate at both locations at the same time is measured.
そして、それと共に、第１流量計６を流れるエンジンオ
イルの温度Ｔｈ及び圧力Ｐｈが第１温度計７及び第１圧
力計８゛により測定され、第２流量計ｌＯを流れるエン
ジンオイルの温度ＴＩ及び圧力ＰＩが第２温度計１１及
び第２圧力計１２により測定される。At the same time, the temperature Th and pressure Ph of the engine oil flowing through the first flow meter 6 are measured by the first thermometer 7 and the first pressure gauge 8', and the temperature TI and pressure Ph of the engine oil flowing through the second flow meter IO are measured. Pressure PI is measured by second thermometer 11 and second pressure gauge 12 .
測定管路４中を流れるエンジンオイルには、空気が混入
されているので、圧力が変化すると、空気量の体積に変
化が生じ、その結果、積算流量（体積）にも変化が生じ
る。Since air is mixed in the engine oil flowing through the measurement pipe 4, when the pressure changes, the volume of the air amount changes, and as a result, the integrated flow rate (volume) also changes.
従って、第１温度計７及び第２温度計１１による測定温
度Ｔｈ、ＴＩに基づいて、第１流量計６を流れるエンジ
ンオイルの温度Ｔｈと第２流量計１０を流れるエンジン
オイルの温度ＴＩとを同一に維持するか、それらの温度
差↑ｈ−ＴＩの温度補正を流量計測値に加えるかした上
で、異なる圧力Ｐｈ。Therefore, based on the temperatures Th and TI measured by the first thermometer 7 and the second thermometer 11, the temperature Th of the engine oil flowing through the first flow meter 6 and the temperature TI of the engine oil flowing through the second flow meter 10 are determined. Different pressures Ph, either by keeping them the same or by adding a temperature correction of their temperature difference ↑h - TI to the flow rate measurements.
ＰｉＯ下での流量ＶＭ、Ｖｌｄに基づいてエンジンオイ
ル中の空気混入量・混入率が次のようにして算比される
。Based on the flow rates VM and Vld under PiO, the amount and ratio of air mixed into the engine oil are calculated and compared as follows.
標準圧力ＰＯの場合における混入空気の体積： ＶＯ
ａ
オイルのみの体積
： ＶＯＩ
高圧力ｐｈの場合における混入空気の体積： Ｖｈａ
オイルのみの体積
： Ｖｈｌ
測定積算流量（体積）
ゝ ： Ｖｈｄ
低圧力Ｐｌの場合における混入空気の体積：Ｖｌａ
オイルのみの体積
：Ｖｌｌ
Ｓす定積算流量（＃−積）
：Ｖｌｄ
Ｔｈ＝ＴＩ＝一定とする。Volume of entrained air at standard pressure PO: VO
a Volume of oil only: VOI Volume of entrained air in case of high pressure ph: Vha Volume of oil only: Vhl Measured integrated flow rate (volume) ゝ : Vhd Volume of entrained air in case of low pressure Pl: Vla Volume of oil only :Vll S constant integrated flow rate (#-product) :Vld Th=TI=constant.
オイルの体積弾性係数は、空気の体積弾性係数に較べて
非常に大きいから、次のように見做せる。Since the bulk modulus of oil is much larger than that of air, it can be considered as follows.
Ｖｈｌ＝Ｖｌｌ＝ＶＯＩ
高圧力ｐｈ、低圧力ＰＩＯ下での測定積算流量（体積）
Ｖｈｄ、Ｖｌｄは、夫々、下記の式の内容を測定してい
る。Vhl=Vll=VOI Measured integrated flow rate (volume) under high pressure ph and low pressure PIO
Vhd and Vld each measure the contents of the following formulas.
ｖｈｄ＝ＶＯ１十Ｖｈａ・・・・・・・・（１）Ｖｌｄ
＝ＶＯ１＋Ｖｌａ ・−・−・・・・（２）又、圧力と
体積との間には、（３）式の関係がある。vhd=VO10Vha・・・・・・(1)Vld
=VO1+Vla (2) Furthermore, there is a relationship between pressure and volume as shown in equation (3).
Ｐｈ−Ｖｈａ＝Ｐｌ−Ｖｌａ・ ・ ・ ・ ・ ・（
３）（１）（２）式より
Ｖｈｄ−Ｖｈａ＝Ｖ１ｄ−Ｖｉａ ・ ・ ・ ・ ・
（４）（３）式より
Ｖｈａ＝（ＰＩ／Ｐｈ） ・Ｖｉａ ・・・Ｈ，＋ （
５）（４）（５）式より
Ｖ１ａ＝Ｖｄ−Ｖｄ
１−（ＰＩ／Ｐｂ）
・ ・ ・ ・ （６）
又、ＰＧ ・ＶＯａ＝ Ｐ １−Ｖｌａ・ ・ ・ ・
・ （７）
（６）（７）式より
（８）（９）式から、高圧時の圧力Ｐｈ、積算流量（体
積）Ｖｈｄ及び低圧時の圧力ＰＬ、積算流量（体積ンＶ
ｌｄを測定することによりエンジンオイル中の空気混入
量・混入率を算比することができる。Ph-Vha=Pl-Vla・・・・・・・(
3) From formulas (1) and (2), Vhd-Vha=V1d-Via ・ ・ ・ ・ ・
(4) From formula (3), Vha=(PI/Ph) ・Via...H,+ (
5) From formulas (4) and (5), V1a=Vd-Vd 1-(PI/Pb) ・ ・ ・ ・ (6) Also, PG ・VOa= P 1-Vla ・ ・ ・
・ (7) From equations (6) and (7), from equations (8) and (9), pressure Ph at high pressure, integrated flow rate (volume) Vhd, pressure PL at low pressure, integrated flow rate (volume V
By measuring ld, it is possible to calculate the amount and ratio of air mixed into the engine oil.
以上の計算は、温度が一定であるとしているが。The above calculations assume that the temperature is constant.
夫々の圧力において温度が異なる場合には、温度補正を
加えて、高圧時の圧力・温度・体積と低圧時の圧力・温
度・体積とを測定することにより上記と同様に混入空気
量・混入率を求めることができる。If the temperature is different for each pressure, add temperature correction and measure the pressure, temperature, and volume at high pressure and the pressure, temperature, and volume at low pressure to determine the amount and rate of entrained air in the same way as above. can be found.
（発明の効果）
この発明のエンジンオイル空気混入量測定方法及び装置
によれば、短時間にエンジンオイル中の空気混入量を測
定することができると共に、測定に際して、使用中のエ
ンジンオイルを採取することなく、オイルパンに循環さ
せながら計量を行うので、エンジンオイルをオイルパン
に補充する必要もない。(Effects of the Invention) According to the method and device for measuring the amount of air mixed in engine oil of the present invention, the amount of air mixed in engine oil can be measured in a short time, and at the time of measurement, the engine oil in use can be sampled. There is no need to replenish engine oil to the oil pan as it is measured while circulating it through the oil pan.
第１図は、この発明の実施例におけるエンジンオイル空
気混入量測定装置の構成図、
第２図は、従来の技術におけるエンジンオイル空気混入
量測定装置の構成図である。
１・ニオイルパン ２：ポンプ３：エンジン
オイル管路 ４：測定管路５：流量制御弁
６：第１容積式流量計７＝第１温度計８＝第１油圧計９
：高圧側背圧弁１０：第２容積式流量計 １１＝第２
温度計１２：第２油圧計 １３＝低圧側背圧弁
１４：遠隔制御装置
Ｅ：エンジンFIG. 1 is a configuration diagram of an engine oil aeration amount measuring device according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a conventional engine oil aeration amount measuring device. 1. Oil pan 2: Pump 3: Engine oil line 4: Measuring line 5: Flow rate control valve
6: First positive displacement flowmeter 7 = First thermometer 8 = First oil pressure gauge 9
: High pressure side back pressure valve 10: 2nd positive displacement flowmeter 11 = 2nd
Thermometer 12: Second oil pressure gauge 13 = Low pressure side back pressure valve 14: Remote control device E: Engine
Claims (2)
ンオイルがエンジンの各部を潤滑して再びオイルパンに
戻される循環路から分岐してオイルパンに戻る分岐路中
の適宜箇所においてエンジンオイルに所定圧を与えると
共に、他の箇所において前記所定圧と異なる所定圧を与
え、夫々の所定圧下にあるエンジンオイルの積算流量を
同時に計測し、その計測値に基づいてエンジンオイル中
の空気混入量を算出するエンジンオイル空気混入量測定
方法(1) The engine oil is sucked up by the pump from the oil pan, lubricates various parts of the engine, and then returns to the oil pan.The engine oil is then branched off from the circulation path and returned to the oil pan at an appropriate point in the circulation path to a predetermined pressure. At the same time, a predetermined pressure different from the predetermined pressure is applied at another location, and the cumulative flow rate of the engine oil under each predetermined pressure is simultaneously measured, and the amount of air mixed in the engine oil is calculated based on the measured value. How to measure the amount of air mixed in engine oil
ンオイルがエンジンの各部を潤滑して再びオイルパンに
戻される循環路から分岐してオイルパンに戻る分岐路が
設けられ、前記分岐路中に適宜の箇所において所定圧を
エンジンオイルに与える圧力設定器が設けられると共に
、他の箇所において前記所定圧と異なる所定圧をエンジ
ンオイルに与える別の圧力設定器が設けられ、夫々の前
記所定圧下のエンジンオイルの積算流量及び圧力を計測
する計測器が夫々備えられているエンジンオイル空気混
入量測定装置(2) A branch path is provided that branches off from the circulation path where the engine oil sucked up by the pump from the oil pan lubricates various parts of the engine and returns to the oil pan, and returns to the oil pan as appropriate. A pressure setting device is provided for applying a predetermined pressure to the engine oil at a location, and another pressure setting device is provided for providing a predetermined pressure different from the predetermined pressure to the engine oil at another location. Engine oil aeration amount measuring device equipped with measuring instruments for measuring the cumulative flow rate and pressure of oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17645890A JPH0465672A (en) | 1990-07-05 | 1990-07-05 | Method and instrument for measuring air mixture amount in engine oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17645890A JPH0465672A (en) | 1990-07-05 | 1990-07-05 | Method and instrument for measuring air mixture amount in engine oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0465672A true JPH0465672A (en) | 1992-03-02 |
Family
ID=16014053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17645890A Pending JPH0465672A (en) | 1990-07-05 | 1990-07-05 | Method and instrument for measuring air mixture amount in engine oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0465672A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100411069B1 (en) * | 2000-12-28 | 2003-12-18 | 현대자동차주식회사 | Method of measuring aeration ratio for oil in head gallery for engine |
| KR100412557B1 (en) * | 2000-12-28 | 2003-12-31 | 현대자동차주식회사 | Aeration measuring device of head gallery |
| US7591922B2 (en) | 2002-01-17 | 2009-09-22 | Dainippon Screen Mfg. Co., Ltd. | Substrate processing apparatus and substrate processing method |
| JP2011001842A (en) * | 2009-06-17 | 2011-01-06 | Denso Corp | Fuel state detection device |
-
1990
- 1990-07-05 JP JP17645890A patent/JPH0465672A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100411069B1 (en) * | 2000-12-28 | 2003-12-18 | 현대자동차주식회사 | Method of measuring aeration ratio for oil in head gallery for engine |
| KR100412557B1 (en) * | 2000-12-28 | 2003-12-31 | 현대자동차주식회사 | Aeration measuring device of head gallery |
| US7591922B2 (en) | 2002-01-17 | 2009-09-22 | Dainippon Screen Mfg. Co., Ltd. | Substrate processing apparatus and substrate processing method |
| JP2011001842A (en) * | 2009-06-17 | 2011-01-06 | Denso Corp | Fuel state detection device |
| US8215161B2 (en) | 2009-06-17 | 2012-07-10 | Denso Corporation | Fuel state sensing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5846831A (en) | Methods and systems for controlling flow of a diluted sample and determining pollutants based on water content in engine exhaust emissions | |
| US11982556B2 (en) | Wet gas flow rate metering method based on a coriolis mass flowmeter and device thereof | |
| CA2436965A1 (en) | Method and apparatus for determining component flow rates for a multiphase flow | |
| JPH02272341A (en) | Method and instrument for measuring vapor pressure of liquid composition | |
| JP2004522061A (en) | Method and apparatus for determining a temperature value in a mass flow conduit | |
| DK56593D0 (en) | flow-meter | |
| CN113899431A (en) | Mobile flow online calibration system | |
| US7389703B2 (en) | Sampler for engine exhaust dilution | |
| JPH0465672A (en) | Method and instrument for measuring air mixture amount in engine oil | |
| RU2004125542A (en) | DEVICE FOR ASSESSING MASS FUEL CONSUMPTION | |
| JP3989629B2 (en) | Flow inspection device | |
| JP4329921B2 (en) | Inspection gas mixing apparatus and mixing method | |
| BR112012026229B1 (en) | production method and device for producing a setpoint signal, supply method and system for providing a setpoint signal, and, turbomachinery | |
| CN107764350A (en) | Mass flow measurement methods and mass flowmenter | |
| US4478080A (en) | Dewpoint measurement system for near saturation conditions | |
| CN208313980U (en) | A kind of device of precise measurement machine oil air content | |
| CA2054985C (en) | Device for dynamically measuring bubble content of flowing liquid | |
| CN108318668A (en) | A kind of accurate device and method for measuring machine oil air content | |
| RU2010185C1 (en) | Method for gas-liquid flowmeter calibrating | |
| JP4698899B2 (en) | Steam turbine power generation system and flow meter verification method in steam turbine power generation system | |
| Hodgson et al. | THE ORIFICE AS A BASIS OF FLOW-MEASUREMENT.(INCLUDES APPENDICES). | |
| JPH03145597A (en) | Method for determining discharge flow rate of rotary pump | |
| JPH0814982A (en) | Method for measuring quantity of liquid | |
| JPH0727591A (en) | How to estimate gas pipe capacity | |
| JPH0618274Y2 (en) | Particle counter |