JPH06137126A - Lubricating oil monitoring device for internal combustion engine - Google Patents
Lubricating oil monitoring device for internal combustion engineInfo
- Publication number
- JPH06137126A JPH06137126A JP31391992A JP31391992A JPH06137126A JP H06137126 A JPH06137126 A JP H06137126A JP 31391992 A JP31391992 A JP 31391992A JP 31391992 A JP31391992 A JP 31391992A JP H06137126 A JPH06137126 A JP H06137126A
- Authority
- JP
- Japan
- Prior art keywords
- lubricating oil
- viscosity
- oil
- flow meter
- flow
- 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
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 79
- 238000002485 combustion reaction Methods 0.000 title claims description 5
- 238000012806 monitoring device Methods 0.000 title claims description 3
- 239000003921 oil Substances 0.000 claims abstract description 23
- 239000000446 fuel Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 101150006573 PAN1 gene Proteins 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、潤滑油の質や循環状
態の異常を検出するための監視装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring device for detecting an abnormality in the quality of lubricating oil or a circulating state.
【０００２】[0002]
【従来の技術】内燃機関を常に良好な状態で運転するに
は潤滑油が適正に循環していることが必要であるため、
潤滑油ポンプの運転状態や潤滑油レベル等を検出してこ
れを常時表示することが一般に行われている。しかし、
潤滑油の質についてはこのような表示手段は設けられて
おらず、定期的に粘度などの性状を検査して劣化してい
れば交換し、あるいは一定期間ごとに交換することが一
般的であるが、従来の粘度検査は、定流量ポンプを用い
てキャピラリに潤滑油を流し、その時の圧力降下から粘
度を算出しており、保守管理が面倒である上に比較的高
価な定流量ポンプが必要であるという問題点があった。2. Description of the Related Art In order for an internal combustion engine to always operate in good condition, it is necessary for the lubricating oil to circulate properly.
It is common practice to detect the operating state of the lubricating oil pump, the lubricating oil level, etc., and constantly display this. But,
Regarding the quality of the lubricating oil, such a display means is not provided, and it is common to periodically inspect properties such as viscosity and replace it if it deteriorates, or replace it at regular intervals. However, in the conventional viscosity test, lubricating oil is flown into the capillary using a constant flow pump, and the viscosity is calculated from the pressure drop at that time, maintenance is troublesome and a relatively expensive constant flow pump is required. There was a problem that was.
【０００３】[0003]
【発明が解決しようとする課題】この発明はこのような
問題点に着目し、潤滑油の粘度だけでなく質や循環状態
なども自動的に且つ常時監視できるようにし、潤滑油の
保守管理を容易に行えるようにすることを課題としてな
されたものである。The present invention pays attention to such a problem, and enables not only the viscosity of the lubricating oil but also the quality and the circulating state thereof to be automatically and constantly monitored, and the maintenance management of the lubricating oil is performed. The task was to make it easy.
【０００４】[0004]
【課題を解決するための手段】上記の課題を達成するた
めに、第１の発明では、潤滑油ポンプによって機関内に
送給される潤滑油の一部をキャピラリを備えた流量計に
分岐して流し、流量計における潤滑油の流量と圧力の検
出結果から潤滑油の粘度を算出するようにしている。ま
た、オイルパンでの潤滑油のレベルが上昇傾向にあり、
且つ上記の手順で算出された潤滑油の粘度が正常値と比
較してある値以下に低下した場合には潤滑油に燃料が混
入していると判定し、正常値と比較してある値以上に上
昇した場合には潤滑油に水が混入していると判定するよ
うに構成している。また第２の発明では、潤滑油ポンプ
の出口での圧力と、潤滑油ポンプの下流側に設けられて
いるフィルタの入口と出口での圧力差が共に上昇傾向に
あり、且つフィルタに設けられたリリーフスイッチの開
期間が増加傾向にあれば、フィルタで目詰まりが発生し
ていると判定するように構成している。In order to achieve the above object, in the first invention, a part of the lubricating oil fed into the engine by a lubricating oil pump is branched to a flow meter equipped with a capillary. The viscosity of the lubricating oil is calculated from the detection results of the flow rate and the pressure of the lubricating oil in the flow meter. Also, the level of lubricating oil in the oil pan is increasing,
In addition, if the viscosity of the lubricating oil calculated by the above procedure drops below a certain value compared to the normal value, it is judged that fuel is mixed in the lubricating oil, and it is greater than a certain value compared to the normal value. When the temperature rises to 1, it is determined that the lubricating oil contains water. In the second aspect of the invention, the pressure at the outlet of the lubricating oil pump and the pressure difference between the inlet and the outlet of the filter provided on the downstream side of the lubricating oil pump both tend to increase, and the filter is provided on the filter. If the opening period of the relief switch tends to increase, it is determined that the filter is clogged.
【０００５】[0005]
【作用】細い管内に液体を流した場合の流量、圧力、粘
度の三者の間には一定の関係が成立するから、キャピラ
リを備えた流量計に潤滑油を流し、その時の流量と圧力
から定流量ポンプを用いないでも粘度を算出することが
できる。また、潤滑油には燃料や冷却水の混入が生じや
すいものであり、これを適切に検出することは潤滑油の
管理にとって重要なことであるが、これらの混入があれ
ば見かけ上の潤滑油量が増加すると共に粘度が変化す
る。このため、上記のようにして算出される粘度と潤滑
油レベルの組合せにより、間接的にこれらの現象を検出
することができる。更にフィルタは目詰まりが生じやす
いものであるが、ポンプ出口での圧力、フィルタ前後の
圧力差及びリリーフスイッチの開期間の組合せにより、
間接的にこれらの現象を検出することができる。[Function] Since a constant relationship is established among the flow rate, pressure, and viscosity when a liquid is flown in a thin pipe, lubricating oil is flown through a flow meter equipped with a capillary, and the flow rate and pressure at that time The viscosity can be calculated without using a constant flow pump. In addition, since lubricating oil easily mixes with fuel and cooling water, proper detection of this is important for the management of lubricating oil. The viscosity changes with increasing amount. Therefore, these phenomena can be indirectly detected by the combination of the viscosity and the lubricating oil level calculated as described above. Furthermore, the filter is apt to be clogged, but due to the combination of the pressure at the pump outlet, the pressure difference before and after the filter, and the open period of the relief switch,
These phenomena can be detected indirectly.
【０００６】[0006]
【実施例】次に図示の一実施例について説明する。図１
は潤滑油の概略系統図である。１はオイルパン、２はオ
イルポンプ、３はフィルタ、４はオイルクーラ、５は機
関本体内のメインギャラリ、６は摺動部、７は流量計で
あり、潤滑油はオイルポンプ２によってフィルタ３、オ
イルクーラ４を経てメインギャラリ５に送給され、ここ
から主軸受などの各摺動部６と流量計７とに分かれて流
れ、オイルパン１に戻るような循環経路となっている。
フィルタ３にはリリーフスイッチ８が設けられ、オイル
ポンプ２の出口、フィルタ３の出口、メインギャラリ
５、流量計７には圧力センサ９ａ，９ｂ，９ｃ，９ｄが
それぞれ設けられており、更に流量計７には温度センサ
１０が設けられ、オイルパン１にはレベルセンサ１１が
設けられている。１２はコントローラであり、各センサ
の検出出力やリリーフスイッチ８の開閉状態が入力さ
れ、粘度を算出したりセンサの検出値の変化を監視した
りするように構成されている。このコントローラ１２と
しては一般にコンピュータを利用することができる。１
３は潤滑油を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment shown in the drawings will be described below. Figure 1
FIG. 3 is a schematic system diagram of lubricating oil. 1 is an oil pan, 2 is an oil pump, 3 is a filter, 4 is an oil cooler, 5 is a main gallery in the engine body, 6 is a sliding portion, 7 is a flowmeter, and lubricating oil is filtered by the oil pump 2 by the filter 3 The oil is supplied to the main gallery 5 via the oil cooler 4, and then flows into the sliding parts 6 such as the main bearings and the flow meter 7 separately, and then returns to the oil pan 1.
The filter 3 is provided with a relief switch 8, the outlet of the oil pump 2, the outlet of the filter 3, the main gallery 5 and the flow meter 7 are provided with pressure sensors 9a, 9b, 9c and 9d, respectively. 7 is provided with a temperature sensor 10, and the oil pan 1 is provided with a level sensor 11. Reference numeral 12 denotes a controller, which is configured to input the detection output of each sensor and the open / closed state of the relief switch 8 to calculate the viscosity and monitor the change in the detection value of the sensor. A computer can be generally used as the controller 12. 1
Reference numeral 3 represents a lubricating oil.
【０００７】流量計７は図２のようにキャピラリ７ａを
備えた構造のものであり、流量計本体７ｂとキャピラリ
７ａとの接続部が圧力センサ９ｄと温度センサ１０が設
けられた検出部７ｃとなっている。７ｄは潤滑油入口、
７ｅは同出口、７ｆは基台である。前述したように、潤
滑油の粘度の測定は定流量ポンプを用いてキャピラリに
潤滑油を流し、その時の圧力降下から算出していたので
あるが、そのような手順によらないでも、流量計７を流
れる潤滑油の流量と圧力が分かれば所定の換算式から粘
度を算出することができる。そこでこの実施例では、流
量計７と圧力センサ９ｄの各検出出力をコントローラ１
２に入力し、コントローラ１２に記憶された換算式を用
いて潤滑油の粘度を算出するのである。The flowmeter 7 has a structure having a capillary 7a as shown in FIG. 2, and a connecting portion between the flowmeter main body 7b and the capillary 7a is a pressure sensor 9d and a detecting portion 7c provided with a temperature sensor 10. Has become. 7d is a lubricating oil inlet,
7e is the same exit, and 7f is a base. As described above, the viscosity of the lubricating oil was measured by flowing the lubricating oil into the capillary using a constant flow pump and calculating from the pressure drop at that time. If the flow rate and the pressure of the lubricating oil flowing through are known, the viscosity can be calculated from a predetermined conversion formula. Therefore, in this embodiment, the detection outputs of the flow meter 7 and the pressure sensor 9d are supplied to the controller 1
Then, the viscosity of the lubricating oil is calculated by using the conversion formula stored in the controller 12 and input to No. 2.
【０００８】なお、図３は潤滑油の粘度と温度の関係を
示したもので、周知のように潤滑油の粘度は温度の高低
と逆の関係にある。実線Ａは新しい潤滑油の標準的な粘
度−温度特性を例示しており、温度が高くなると粘度は
下がるという性質があるので、上記のコントローラ１２
における粘度算出の換算式は温度に応じて補正を行うた
めの補正項を持ったものとしてあり、温度センサ１０で
検出された潤滑油の温度に応じて標準温度における粘度
が算出されるようにしてある。FIG. 3 shows the relationship between the viscosity of the lubricating oil and the temperature. As is well known, the viscosity of the lubricating oil is inversely related to the temperature. The solid line A exemplifies the standard viscosity-temperature characteristic of the new lubricating oil, and since the viscosity decreases as the temperature increases, the controller 12 described above is used.
The conversion formula for calculating the viscosity in has a correction term for making a correction according to the temperature, and the viscosity at the standard temperature is calculated according to the temperature of the lubricating oil detected by the temperature sensor 10. is there.
【０００９】ところで潤滑油は燃料や水が混入すると粘
度が変化し、燃料が混入した場合には粘度は図３の鎖線
Ｂのように下がり、水が混入した場合には破線Ｃのよう
に上がる。また、これらの混入があれば見かけ上の潤滑
油量が増加する。そこで、レベルセンサ１１で検出され
る潤滑油のレベルが上昇傾向にあり、しかもコントロー
ラ１２で算出された潤滑油の粘度が、例えば新油の場合
のＡ線の値を基準値としてあらかじめ設定されたしきい
値を超えて低下した場合には、潤滑油に燃料が混入して
いると判断でき、しきい値を超えて上昇した場合には水
が混入していると判断できるのである。コントローラ１
２からはこれらの判断結果に応じて警報信号Ｓが出力さ
れ、処置が必要であることが報知される。By the way, the viscosity of the lubricating oil changes when fuel or water is mixed in. When the fuel is mixed, the viscosity decreases as shown by a chain line B in FIG. 3 and when the water is mixed, it increases as shown by a broken line C. . Further, if these are mixed, the apparent amount of lubricating oil increases. Therefore, the level of the lubricating oil detected by the level sensor 11 tends to increase, and the viscosity of the lubricating oil calculated by the controller 12 is preset with the value of the line A in the case of new oil as a reference value. If it falls below the threshold value, it can be determined that fuel is mixed in the lubricating oil, and if it rises above the threshold value, it can be determined that water is mixed. Controller 1
An alarm signal S is output from No. 2 according to these determination results, and it is notified that treatment is required.
【００１０】また、潤滑油が劣化した場合も粘度が上が
るが、この場合には潤滑油のレベルは変化しないので冷
却水などの混入とは区別して検出することが可能であっ
た。また、潤滑油のレベル変化の要因としては潤滑油漏
れがあるが、この場合にはレベルが低下し、しかもオイ
ルポンプ２の出口やメインギャラリ５における圧力も低
下傾向を示すので、上記のような原因による異常とは区
別して検出することができる。なお、上記における潤滑
油レベルの検出の際には、数分間のデータを用いた最小
二乗法によって油面の揺れの影響を除去することが望ま
しい。Further, even when the lubricating oil deteriorates, the viscosity increases, but in this case, the level of the lubricating oil does not change, so that it was possible to detect it separately from the mixing of cooling water and the like. Further, although there is a lubricating oil leak as a factor of the change in the level of the lubricating oil, in this case, the level decreases, and the pressure at the outlet of the oil pump 2 and the main gallery 5 also tends to decrease. It can be detected separately from the abnormality caused by the cause. When detecting the lubricating oil level in the above, it is desirable to remove the influence of the fluctuation of the oil level by the least squares method using the data for several minutes.
【００１１】潤滑油は適正に循環していることも必要で
あり、この循環の阻害要因としてはフィルタの目詰まり
が大きなウェイトを占めている。研究によれば、フィル
タ３で詰まりが発生している場合には、オイルポンプ２
の出口における圧力とフィルタ３の前後の圧力差が共に
上昇し、またフィルタ３のリリーフスイッチ８が開いて
いる期間が増加することが見出された。そこで、圧力セ
ンサ９ａの検出値と、圧力センサ９ａ，９ｂの検出値と
の差が共に上昇傾向にあり、しかもリリーフスイッチ８
の開期間が増加傾向にあれば、フィルタ３で目詰まりが
発生していると予想でき、警報信号Ｓがコントローラ１
２から出力されて処置が必要であることが報知される。
なお、圧力だけでなくリリーフスイッチ８の動作状態も
判断に利用しているため、フィルタの目詰まりを高い精
度で検出することができる。It is also necessary that the lubricating oil circulates properly, and as a factor that hinders this circulation, the clogging of the filter occupies a large weight. Studies have shown that when the filter 3 is clogged, the oil pump 2
It has been found that both the pressure at the outlet of the filter and the pressure difference before and after the filter 3 increase, and the period during which the relief switch 8 of the filter 3 is open increases. Therefore, the difference between the detection value of the pressure sensor 9a and the detection value of the pressure sensors 9a and 9b both tend to increase, and the relief switch 8
If the open period of is increasing, it can be predicted that the filter 3 is clogged, and the alarm signal S indicates that the controller 1
It is output from 2 to notify that treatment is required.
Since not only the pressure but also the operating state of the relief switch 8 is used for the determination, the clogging of the filter can be detected with high accuracy.
【００１２】[0012]
【発明の効果】以上の説明から明らかなように、第１の
発明の装置は、潤滑油ポンプによって機関内に送給され
る潤滑油の一部をキャピラリを備えた流量計に分岐して
流し、流量計における潤滑油の流量と圧力の検出結果か
ら潤滑油の粘度を算出するようにしたものである。従っ
て、比較的高価な定流量ポンプを用いないでも粘度を算
出することができ、また、このような手順で算出された
潤滑油の粘度と潤滑油のレベルとを組合せて判断するこ
とにより、粘度及び燃料や水の混入を自動的に常時監視
できるので潤滑油の保守管理が容易になる。また第２の
発明では、潤滑油ポンプの出口と、潤滑油ポンプの下流
側に設けられているフィルタの前後の圧力差が共に上昇
傾向にあり、且つフィルタに設けられたリリーフスイッ
チの開期間が増加傾向にあればフィルタで目詰まりが発
生していると判定するようにしたものである。従って、
潤滑油の循環状態も自動的に且つ常時監視でき、しかも
単に圧力だけでなくリリーフスイッチの開期間も判断基
準として用いているため、フィルタの目詰まりを精度よ
く検出することができる。As is apparent from the above description, in the device of the first invention, a part of the lubricating oil fed into the engine by the lubricating oil pump is branched to the flow meter equipped with the capillary and flowed. The viscosity of the lubricating oil is calculated from the detection result of the flow rate and the pressure of the lubricating oil in the flow meter. Therefore, the viscosity can be calculated without using a relatively expensive constant flow pump, and the viscosity can be calculated by combining the viscosity of the lubricating oil and the level of the lubricating oil calculated by such a procedure. In addition, maintenance of lubricating oil can be facilitated because the mixture of fuel and water can be automatically monitored at all times. In the second aspect of the invention, the pressure difference between the outlet of the lubricating oil pump and the pressure of the filter provided on the downstream side of the lubricating oil pump both tend to increase, and the opening period of the relief switch provided in the filter is increased. If there is an increasing tendency, it is determined that the filter is clogged. Therefore,
The circulation state of the lubricating oil can be automatically and constantly monitored, and since not only the pressure but also the opening period of the relief switch is used as a criterion, clogging of the filter can be accurately detected.
【図１】この発明の一実施例における潤滑油の概略系統
図である。FIG. 1 is a schematic system diagram of a lubricating oil according to an embodiment of the present invention.
【図２】同実施例の流量計の正面図である。FIG. 2 is a front view of the flow meter according to the embodiment.
【図３】潤滑油の粘度と温度の関係を示した図である。FIG. 3 is a diagram showing the relationship between the viscosity of lubricating oil and temperature.
１ オイルパン ２ オイルポンプ ３ フィルタ ５ メインギャラリ ７ 流量計 ７ａ キャピラリ ８ リリーフスイッチ ９ａ〜９ｄ 圧力センサ １０ 温度センサ １１ レベルセンサ １２ コントローラ １３ 潤滑油 1 Oil Pan 2 Oil Pump 3 Filter 5 Main Gallery 7 Flow Meter 7a Capillary 8 Relief Switch 9a-9d Pressure Sensor 10 Temperature Sensor 11 Level Sensor 12 Controller 13 Lubricating Oil
Claims (3)
る潤滑油の一部をキャピラリを備えた流量計に分岐して
流し、流量計における潤滑油の流量と圧力の検出結果か
ら潤滑油の粘度を算出することを特徴とする内燃機関の
潤滑油監視装置。1. A part of the lubricating oil fed into the engine by a lubricating oil pump is branched into a flow meter equipped with a capillary and is made to flow, and the lubricating oil is detected from the results of detection of the flow rate and pressure of the lubricating oil in the flow meter. A lubricating oil monitoring device for an internal combustion engine, characterized by calculating viscosity.
向にあり、且つ算出された潤滑油の粘度が正常値と比較
してある値以下に低下した場合には潤滑油に燃料が混入
していると判定し、正常値と比較してある値以上に上昇
した場合には潤滑油に水が混入していると判定するよう
に構成された請求項１記載の内燃機関の潤滑油監視装
置。2. When the level of the lubricating oil in the oil pan tends to increase and the calculated viscosity of the lubricating oil falls below a certain value compared with a normal value, fuel is mixed in the lubricating oil. 2. The lubricating oil monitoring apparatus for an internal combustion engine according to claim 1, wherein the lubricating oil monitoring apparatus is configured to determine that the lubricating oil is mixed with water when it rises above a certain value as compared with a normal value. .
ポンプの下流側に設けられているフィルタの入口と出口
での圧力差が共に上昇傾向にあり、且つフィルタに設け
られたリリーフスイッチの開期間が増加傾向にあれば、
フィルタで目詰まりが発生していると判定するように構
成されたことを特徴とする内燃機関の潤滑油監視装置。3. The pressure at the outlet of the lubricating oil pump and the pressure difference between the inlet and the outlet of a filter provided on the downstream side of the lubricating oil pump both tend to increase, and a relief switch provided on the filter. If the opening period of is increasing,
A lubricating oil monitoring apparatus for an internal combustion engine, which is configured to determine that a filter is clogged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31391992A JP3155095B2 (en) | 1992-10-28 | 1992-10-28 | Lubricating oil monitoring device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31391992A JP3155095B2 (en) | 1992-10-28 | 1992-10-28 | Lubricating oil monitoring device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06137126A true JPH06137126A (en) | 1994-05-17 |
| JP3155095B2 JP3155095B2 (en) | 2001-04-09 |
Family
ID=18047102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31391992A Expired - Fee Related JP3155095B2 (en) | 1992-10-28 | 1992-10-28 | Lubricating oil monitoring device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3155095B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1471216A2 (en) * | 2003-04-25 | 2004-10-27 | Delphi Technologies, Inc. | Apparatus and method for determining oil change based upon oil viscosity |
| JP2010138817A (en) * | 2008-12-11 | 2010-06-24 | Mitsubishi Motors Corp | Engine oil circulation system |
| JP2010185282A (en) * | 2009-02-10 | 2010-08-26 | Mazda Motor Corp | Control device for diesel engine |
| CN103883375A (en) * | 2012-12-20 | 2014-06-25 | Dr.Ing.h.c.F.保时捷股份公司 | Method For Determining A Fuel Fraction In Oil |
| JP2019147539A (en) * | 2018-02-28 | 2019-09-05 | トヨタ自動車株式会社 | Control device for hybrid vehicle |
| JP2020105968A (en) * | 2018-12-27 | 2020-07-09 | いすゞ自動車株式会社 | Hydraulic pressure warning device |
| CN111579439A (en) * | 2020-05-15 | 2020-08-25 | 一通科技发展(广东)有限公司 | Granularity and viscosity monitoring instrument for mechanical lubrication hydraulic system |
| CN112196684A (en) * | 2020-09-08 | 2021-01-08 | 东风商用车有限公司 | Method and system for judging diesel engine oil fuel oil dilution |
| CN112748750A (en) * | 2020-12-23 | 2021-05-04 | 深圳市亚泰光电技术有限公司 | Oil online measurement and control system |
| WO2022035808A1 (en) * | 2020-08-10 | 2022-02-17 | Schlumberger Technology Corporation | Equipment lubricant water ingress measurement system and method |
| CN114269587A (en) * | 2019-09-16 | 2022-04-01 | 纬湃技术有限公司 | Method for monitoring oil flow in an oil cooling circuit |
| CN114324828A (en) * | 2021-12-31 | 2022-04-12 | 崇左南方水泥有限公司 | Lubricated detecting system of rotary kiln riding wheel |
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1992
- 1992-10-28 JP JP31391992A patent/JP3155095B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1471216A2 (en) * | 2003-04-25 | 2004-10-27 | Delphi Technologies, Inc. | Apparatus and method for determining oil change based upon oil viscosity |
| EP1471216A3 (en) * | 2003-04-25 | 2009-12-30 | Delphi Technologies, Inc. | Apparatus and method for determining oil change based upon oil viscosity |
| JP2010138817A (en) * | 2008-12-11 | 2010-06-24 | Mitsubishi Motors Corp | Engine oil circulation system |
| JP2010185282A (en) * | 2009-02-10 | 2010-08-26 | Mazda Motor Corp | Control device for diesel engine |
| CN103883375A (en) * | 2012-12-20 | 2014-06-25 | Dr.Ing.h.c.F.保时捷股份公司 | Method For Determining A Fuel Fraction In Oil |
| US9726129B2 (en) | 2012-12-20 | 2017-08-08 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for determining a fuel fraction in oil |
| JP2019147539A (en) * | 2018-02-28 | 2019-09-05 | トヨタ自動車株式会社 | Control device for hybrid vehicle |
| JP2020105968A (en) * | 2018-12-27 | 2020-07-09 | いすゞ自動車株式会社 | Hydraulic pressure warning device |
| CN114269587A (en) * | 2019-09-16 | 2022-04-01 | 纬湃技术有限公司 | Method for monitoring oil flow in an oil cooling circuit |
| CN111579439A (en) * | 2020-05-15 | 2020-08-25 | 一通科技发展(广东)有限公司 | Granularity and viscosity monitoring instrument for mechanical lubrication hydraulic system |
| WO2022035808A1 (en) * | 2020-08-10 | 2022-02-17 | Schlumberger Technology Corporation | Equipment lubricant water ingress measurement system and method |
| CN112196684A (en) * | 2020-09-08 | 2021-01-08 | 东风商用车有限公司 | Method and system for judging diesel engine oil fuel oil dilution |
| CN112748750A (en) * | 2020-12-23 | 2021-05-04 | 深圳市亚泰光电技术有限公司 | Oil online measurement and control system |
| WO2022134867A1 (en) * | 2020-12-23 | 2022-06-30 | 深圳市亚泰光电技术有限公司 | Online measurement and control system for oil |
| CN114324828A (en) * | 2021-12-31 | 2022-04-12 | 崇左南方水泥有限公司 | Lubricated detecting system of rotary kiln riding wheel |
| CN114324828B (en) * | 2021-12-31 | 2022-11-08 | 崇左南方水泥有限公司 | Lubricated detecting system of rotary kiln riding wheel |
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|---|---|
| JP3155095B2 (en) | 2001-04-09 |
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