JPH0337315A - Lubricating oil shortage detector in engine - Google Patents
Lubricating oil shortage detector in engineInfo
- Publication number
- JPH0337315A JPH0337315A JP17360289A JP17360289A JPH0337315A JP H0337315 A JPH0337315 A JP H0337315A JP 17360289 A JP17360289 A JP 17360289A JP 17360289 A JP17360289 A JP 17360289A JP H0337315 A JPH0337315 A JP H0337315A
- Authority
- JP
- Japan
- Prior art keywords
- voltage value
- lubricating oil
- oil
- shortage
- reference voltage
- 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 51
- 239000003921 oil Substances 0.000 claims abstract description 60
- 238000001514 detection method Methods 0.000 claims description 35
- 239000000314 lubricant Substances 0.000 claims description 15
- 101150006573 PAN1 gene Proteins 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000002568 Capsicum frutescens Nutrition 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
【産業上の利用分野］
本発明は、潤滑油の抵抗値からｙｉ潤滑油不足検出する
エンジンのｍ滑抽不足検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an m-slip draw deficiency detection device for an engine that detects a yi lubricant shortage from a resistance value of the lubricant.
【従来の技術と発明が解決しようとする課題］一般に、
汎用エンジン、車載用エンジンなどでは、潤滑油が不足
状態であることに気付かずに運転状態を維持すると焼き
付きなどの損傷を招くため、１１滑油量を常時モニタし
、Ｉ！滑油量不足の場合、エンジンを停止させたり、警
告灯を点灯させてエンジンのａｍを未然に防止する潤滑
油不足検出装置をｖｉＩａするものが多い。[Prior art and problems to be solved by the invention] Generally,
In general-purpose engines, automotive engines, etc., if you continue to operate without realizing that there is a lack of lubricating oil, it will cause damage such as seizure, so 11 The lubricating oil amount is constantly monitored and the I! In the case of insufficient lubricating oil, many vehicles have viIa lubricating oil shortage detection devices that stop the engine or turn on a warning light to prevent engine failure.
ところで、上記潤滑油不足検出装置に設けたオイルセン
サとしては、例えば、特開昭６２−９３４１７号公報、
特開昭６２−２６３７９号公報に開示されているような
潤滑油面を監視するフロートスイッチ式、あるいは、ａ
ｉＷ４油圧を監視する油圧スイッチ式などがあるが、フ
ロートスイッチ式は、その機能上台構成部品（フロート
、リードスイッチなど）をエンジン内部に設置する必要
があり、後付けする場合はオイルパン底面に取付は穴を
開けて組み付けなければならない。By the way, as an oil sensor provided in the above lubricating oil shortage detection device, for example, Japanese Patent Application Laid-Open No. 62-93417,
A float switch type for monitoring the lubricating oil level as disclosed in Japanese Patent Application Laid-Open No. 62-26379, or a
iW4 There are oil pressure switch types that monitor oil pressure, but the float switch type requires that the base components (float, reed switch, etc.) be installed inside the engine due to its functionality, and if it is retrofitted, it cannot be installed on the bottom of the oil pan. You have to drill a hole and assemble it.
その結果、メンテナンスが煩雑化するばかりでなく、後
付けの場合、オイルパン底部に穿設した後付は穴とのシ
ール性を充分に保証しなければならず、構造、および、
組付けが複雑化する問題がある。As a result, not only does maintenance become complicated, but in the case of retrofitting, the structure and
There is a problem that assembly becomes complicated.
一方、油圧スイッチ式は、潤滑油圧が低下したときにＯ
Ｎ動作するもので、少なくとも通路内にエアーの混入に
よる潤滑油不足が既に発生している。したがって、上記
油圧スイッチがＯＮＬ、た後は直ちにエンジンを停止さ
せなければならないが、汎用エンジンなどで連続運転中
に事前に予告することなくエンジンを突然停止させるこ
とは、作業の著しい停滞をｆｆ？ ＜などの不都合があ
る。On the other hand, the oil pressure switch type turns on the oil when the lubricating oil pressure decreases.
Since this is a N-operation type, at least a lack of lubricating oil has already occurred due to air entering the passage. Therefore, it is necessary to stop the engine immediately after the oil pressure switch is turned ON, but stopping the engine suddenly without prior notice during continuous operation of a general-purpose engine, etc., can cause a significant stagnation of work. There are inconveniences such as <.
また、最近では圧電素子を用いて潤滑油不足を検出する
オイルセンサが開発されているが、この圧電素子は１１
１滑油の気泡、波立ちなど一時的な変動に対しても敏感
に反応してしまうため回路的に補償づる必要があるが、
補償レベルのセツティングが難しく、この補償レベルを
大きくするとｎ滑油不足を事前に検出することが困難に
なるばかりか、潤滑油不足検出に遅れが生じる問題があ
る。Recently, an oil sensor has been developed that uses a piezoelectric element to detect lubricant shortage, but this piezoelectric element has 11
1.Since it reacts sensitively to temporary fluctuations such as bubbles and ripples in the lubricating oil, it is necessary to compensate for it in the circuit.
It is difficult to set the compensation level, and if the compensation level is increased, it becomes difficult to detect a lubricant shortage in advance, and there is a problem that there is a delay in detecting a lubricant shortage.
［発明の目的］
本発明は上記事情に鑑みてなされたもので、メンテナン
スが容易で、シール性を充分に保証することができ、し
かも、構造、組付けが簡単で作業性がよく、その上、潤
滑油不足を事前に正確に検出することができるばかりで
なく、＋ｍ′＃油不足検出レベルを容易にセツティング
つることのできるエンジンの潤滑油不足検出装置を提供
することを目的としている。[Object of the Invention] The present invention has been made in view of the above circumstances, and is easy to maintain, can sufficiently guarantee sealing performance, is simple in structure and assembly, and has good workability. An object of the present invention is to provide a lubricating oil shortage detection device for an engine that not only can accurately detect lubricating oil shortage in advance, but also can easily set the +m'# oil shortage detection level.
［課題を解決するための手段］
（１）本発明による刀−のエンジンの潤滑油不足検出装
置は、互いに対峙する一対の電極をオイルパン内に臨ま
せ、この一対の電極間の抵抗値を検出するオイルセンサ
と、上記オイルセンサで検出した抵抗値を電圧値に変換
して検出する電圧検出手段と、上記電圧検出手段で検出
した電圧値と基準電圧値とを比較して潤滑油不足かどう
かを判断する電圧値比較手段とを具備するものである。[Means for Solving the Problems] (1) The lubricating oil shortage detection device for a sword engine according to the present invention has a pair of electrodes facing each other facing into the oil pan, and measures the resistance value between the pair of electrodes. An oil sensor detects, a voltage detection means detects by converting the resistance value detected by the oil sensor into a voltage value, and the voltage value detected by the voltage detection means is compared with a reference voltage value to determine whether lubricating oil is insufficient. and voltage value comparison means for determining whether or not the voltage is high.
（２）本発明による第二のエンジンの潤滑油不足検出装
置は、互いに対峙する一対の電極をオイルパン内に臨ま
せ、この一対の電極間の抵抗値を検出するオイルセンサ
と、上記オイルセンサで検出した抵抗値を電圧値に変換
して検出する電圧検出手段と、温度補償を行い基準電圧
値を設定する基準電圧値設定手段と、上記電圧検出手段
で検出した電圧値と上記基準電圧値設定手段で設定した
基準電圧値とを比較して潤滑油不足かどうかを判断する
電圧値比較手段とを具備するものである。(2) The second engine lubricating oil shortage detection device according to the present invention includes an oil sensor that has a pair of electrodes facing each other facing into the oil pan and detects a resistance value between the pair of electrodes, and the oil sensor as described above. a voltage detection means that converts and detects the resistance value detected by the voltage value into a voltage value; a reference voltage value setting means that performs temperature compensation and sets a reference voltage value; and a voltage value detected by the voltage detection means and the reference voltage value. A voltage value comparing means is provided for comparing the reference voltage value set by the setting means to determine whether there is a lubricant shortage.
［作 用］
（１）上記構成による第一のエンジンの潤滑油不足検出
装置では、まず、オイルパン内に臨ませたオイルセンサ
の互いに対峙する一対の電極間で検出した抵抗値を電圧
値に変換して検出する。[Function] (1) In the first engine lubricating oil shortage detection device having the above configuration, first, the resistance value detected between a pair of electrodes facing each other of the oil sensor facing inside the oil pan is converted into a voltage value. Convert and detect.
次いで、上記電圧値と基準電圧値とを比較し、電圧値が
基準電圧値を越えている場合、潤滑油不足と判断する。Next, the voltage value is compared with a reference voltage value, and if the voltage value exceeds the reference voltage value, it is determined that there is a lubricant shortage.
（２）上記構成による第二のエンジンの潤滑油不足検出
装置では、まず、オイルパンに臨ませたオイルセンサの
互いに対峙する一対の電極間で検出した抵抗値を電圧値
に変換して検出する。(2) In the second engine lubricating oil shortage detection device having the above configuration, first, the resistance value detected between a pair of electrodes facing each other of the oil sensor facing the oil pan is converted into a voltage value and detected. .
また、温度補償を行い基準電圧値を設定し、この基準電
圧値と上記電圧値とを比較し、電圧値が基準電圧値を越
えている場合、潤滑油不足と判断する。Further, temperature compensation is performed, a reference voltage value is set, and this reference voltage value is compared with the above-mentioned voltage value. If the voltage value exceeds the reference voltage value, it is determined that there is a lubricant shortage.
［発明の実施例］
以下、図面に基づいて本発明の実施例について説明する
。[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described based on the drawings.
図面は本発明の一実施例を示し、第１図は潤滑油不足検
出装置の機能ブロック図、第２図はオイルセンサの外観
図、第３図は潤滑油の抵抗値と温度との特性図である。The drawings show an embodiment of the present invention; Fig. 1 is a functional block diagram of a lubricating oil shortage detection device, Fig. 2 is an external view of an oil sensor, and Fig. 3 is a characteristic diagram of resistance value and temperature of lubricating oil. It is.
図中の符号１はエンジンのオイルパンで、このオイルパ
ン１の一側に形成したオイルセンサ取付口１ａにオイル
センサ２が装着されている。Reference numeral 1 in the figure is an oil pan of an engine, and an oil sensor 2 is attached to an oil sensor attachment port 1a formed on one side of the oil pan 1.
このオイルセンサ２のセンサ外電極２ａが円筒状に形成
したセンサボディを兼用し、また、このセンサ外電極２
ａに絶縁部材２ｂを介してセンサ内電極２Ｃが挿通支持
されていると共に、内電極２ａ、 ２ｂがオイルパン１
内に臨ませである。The sensor outer electrode 2a of this oil sensor 2 also serves as a cylindrical sensor body, and this sensor outer electrode 2a also serves as a cylindrical sensor body.
A sensor internal electrode 2C is inserted into and supported by the insulating member 2b, and the internal electrodes 2a and 2b are connected to the oil pan 1.
Come inside.
また、上記オイルセンサ２の上記センサ外電極２ ａ
ｓセンサ内電極２Ｃがリード線４を介して、エンジンに
併設した潤滑油不足検出手段５に接続されている。Further, the sensor outer electrode 2 a of the oil sensor 2
The s-sensor internal electrode 2C is connected via a lead wire 4 to lubricating oil shortage detection means 5 attached to the engine.
上記潤滑油不足検出手段５が、電圧検出手段６、基準電
圧値設定手段７、電圧値比較手段８、タイマー手段９、
外部駆動手段１０、および、電源回路１１で構成されて
おり、この電源回路１１から上記各手段６〜１０へ駆動
電圧が供給される。The lubricating oil shortage detection means 5 includes a voltage detection means 6, a reference voltage value setting means 7, a voltage value comparison means 8, a timer means 9,
It is composed of an external drive means 10 and a power supply circuit 11, and a drive voltage is supplied from the power supply circuit 11 to each of the above-mentioned means 6 to 10.
電圧検出手段６では、上記オイルセンサ２で検出した内
電極２ａ、２Ｃ間の抵抗値を電圧値Ｖに変換して検出す
る。The voltage detection means 6 converts the resistance value between the inner electrodes 2a and 2C detected by the oil sensor 2 into a voltage value V and detects it.
一般に潤滑油は絶縁体と考えられるが、空気と比較した
場合、その絶縁度は低く、ｒｆｌ滑油も空気との関係に
おいては高抵抗体とみなすことができる。Lubricating oil is generally considered to be an insulator, but its degree of insulation is low when compared to air, and RFL lubricating oil can also be considered a high resistance body in relation to air.
したがって、上記オイルセンサ２の電極２ａ。Therefore, the electrode 2a of the oil sensor 2.
２０間の抵抗値に基づく電圧値■を検出することで、潤
滑油量が所定以上溝たされているかどうかを検出するこ
とができる。By detecting the voltage value {circle over (2)} based on the resistance value between 20 and 20, it is possible to detect whether or not the amount of lubricating oil is more than a predetermined amount.
基準電圧値設定手段７では、潤滑油不足判定用基準電圧
値ＶＯを設定する。ずなわら、刀３図に示すように、上
記潤滑油の抵抗値特性が温度の影響で変動するので、そ
れを補償すべく上記潤滑浦不足判定用基準電圧値■０を
可変設定するもので、具体的には、ＮＴＣサーミスタな
どの温度素子を用い、エンジンの輻射熱による雰、囲気
温度による上記温度素子の抵抗値変化によって基準電圧
を補償し、ｍ滑油不足判定用基準電圧値■０を設定する
。この場合、雰囲気温度によって補償を行うので、上記
温度素子を、潤滑油不足検出手段５を構成する回路基板
上に配置すればよいので構成が簡素化する。The reference voltage value setting means 7 sets a reference voltage value VO for lubricating oil shortage determination. However, as shown in Figure 3, the resistance value characteristics of the lubricating oil fluctuate due to the influence of temperature, so in order to compensate for this, the reference voltage value ■0 for determining lubrication hole shortage is variably set. Specifically, using a temperature element such as an NTC thermistor, the reference voltage is compensated by the change in the resistance value of the temperature element due to the atmosphere and ambient temperature caused by the radiant heat of the engine, and the reference voltage value for lubricant shortage determination 0 is determined. Set. In this case, since compensation is performed based on the ambient temperature, the temperature element may be placed on the circuit board constituting the lubricating oil shortage detection means 5, which simplifies the configuration.
なお、上記潤滑油不足判定用基準電圧値ＶＯは、ｎ滑油
の抵抗値による電圧値よりも若干大きな値に設定するも
のである。Note that the reference voltage value VO for lubricating oil shortage determination is set to a value slightly larger than the voltage value based on the resistance value of n-lubricating oil.
また、構成が多少複雑化するが上記ｍ度素子を直接オイ
ルパン１に付設し、これによって直接的に潤滑油の抵抗
値の温度による変化を補償するようにしてもよい。Alternatively, although the configuration is somewhat complicated, the m-degree element may be directly attached to the oil pan 1, thereby directly compensating for changes in the resistance value of the lubricating oil due to temperature.
さらに、雰囲気温度あるいは潤滑１１ｔｌ温度をＩｉ度
センサを用いて検出し、温度センサによって検出した温
度をパラメータとして、予め実験などから求めたマツプ
を検索することによって上記潤滑油不足判定用基準電圧
値ＶＯを設定するようにしてもよいものである。Furthermore, by detecting the ambient temperature or the lubricant 11tl temperature using an Ii degree sensor, and searching a map previously obtained from experiments using the temperature detected by the temperature sensor as a parameter, the reference voltage value VO for lubricating oil shortage determination is determined. It is also possible to set .
電圧値比較手段８では、上記電圧検出手段６で検出した
電圧値■と上記基準電圧値設定手段７で設定した基準電
圧値ｖＯとを比較し、■≦■０の場合、ｒＡＷＩＩ油あ
りと判断し潤滑油有り信号（例えばローレベル信号〉を
出力する。また、Ｖ＞ＶＯの場合、ｎ滑油なしと判断し
ｎ滑油無し信号（例えばハイレベル信号）を出力する。The voltage value comparison means 8 compares the voltage value ■ detected by the voltage detection means 6 with the reference voltage value vO set by the reference voltage value setting means 7, and if ■≦■0, it is determined that rAWII oil is present. If V>VO, it is determined that there is no lubricating oil, and a lubricating oil presence signal (for example, a high level signal) is output.
タイマー手段９では、上記電圧値比較手段８から潤滑油
無し信号が所定時間出力されているかどうかをカウント
し、所定時間出力されている場合、駆動信号を出力する
。The timer means 9 counts whether or not the lubricating oil-free signal is output from the voltage value comparison means 8 for a predetermined period of time, and outputs a drive signal if the signal is output for a predetermined period of time.
すなわち、このタイマー手段９により、彼女などによる
一時的な検出誤動作を防止する。That is, this timer means 9 prevents temporary detection malfunctions caused by a girlfriend or the like.
外部駆動手段１０では、上記タイマー手段９から駆動信
号が出力された場合、ブザー、警告灯などの潤滑油不足
表示手段１２を駆動させて作業者に潤滑１１１１不足を
警告つる。When the drive signal is output from the timer means 9, the external drive means 10 drives a lubricant shortage display means 12 such as a buzzer or a warning light to warn the operator of the lack of lubrication 1111.
このような構成では、定常運転時、オイルパン１に貯留
されている潤滑油が消費されて、オイルセンサ２の電極
２ａ、２Ｃが油面上に徐々に露呈すると、この電極間２
ａ、２Ｇの抵抗値が徐々に高くなり、この抵抗値に基づ
いて設定される電圧値■が次第に高くなる。In such a configuration, during steady operation, when the lubricating oil stored in the oil pan 1 is consumed and the electrodes 2a and 2C of the oil sensor 2 are gradually exposed on the oil surface, the gap between the electrodes 2
The resistance value of a, 2G gradually increases, and the voltage value (2) set based on this resistance value gradually increases.
そして、上記電圧値Ｖが基準電圧値ＶＯを越えた場合（
Ｖ＞ＶＯ）、その継続時間をカウント、し、所定時間継
続している場合、Ｔ！ｉ滑油不足表示手段１２を駆動さ
せて作業者にａ２１滑油不足を報せたり、必要な場合は
エンジンを緊急停止させる。If the voltage value V exceeds the reference voltage value VO (
V>VO), its duration is counted, and if it continues for a predetermined time, T! The lubricating oil shortage display means 12 is driven to inform the operator of the a21 lubricating oil shortage, and if necessary, the engine is brought to an emergency stop.
また、上記オイルセンサ２がオイルパン１の一側に形成
した取付口１ａに装＠されているためシール構造が簡単
であるばかりか、＠脱が容易で、組付は性、メンテナン
ス性がよい。In addition, since the oil sensor 2 is installed in the mounting port 1a formed on one side of the oil pan 1, the seal structure is not only simple but also easy to remove and easy to assemble and maintain.
また、上記基準電圧値設定手段７で設定する基準電圧ｌ
ａｖ◇の設定値を変えることで、潤滑油不足を事前に検
出するように設定することができるばかりでなく、この
潤滑油不足検出レベルを所望の値に簡単にセツティング
することができる。Further, the reference voltage l set by the reference voltage value setting means 7 is
By changing the set value of av◇, it is possible not only to set the lubricating oil shortage to be detected in advance, but also to easily set the lubricating oil shortage detection level to a desired value.
［Ｆｅ明の効果］
以上、説明したように本発明によれば以下に列記する効
果を奏する。[Effects of Fe Light] As described above, according to the present invention, the following effects are achieved.
（１）請求項１によれば、互いに対峙する一対の電極を
オイルパン内に臨ませ、この一対の電極間の抵抗値を検
出するオイルセンサと、上記オイルセンサで検出した抵
抗値を電圧値に変換して検出する電圧検出手段と、上記
電圧検出手段で検出した電圧値と基準電圧値とを比較し
てａｌｌ滑油不足かどうかを判断する電圧値比較手段と
を具備するのでオイルパン中に動作部材を組付ける必要
がなく、また、オイルセンサの着脱が容易であるため、
組付は性、メンテナンス性がよく、かつ、シール性を充
分に保証することができるばかりか、ａ１澗油不足を事
前に検出することができる。(1) According to claim 1, there is provided an oil sensor that has a pair of electrodes facing each other facing into the oil pan, and detects a resistance value between the pair of electrodes, and a voltage value that detects the resistance value detected by the oil sensor. It is equipped with a voltage detection means for converting and detecting the lubricant, and a voltage value comparison means for comparing the voltage value detected by the voltage detection means with a reference voltage value to determine whether all lubricating oil is insufficient. There is no need to assemble operating parts to the oil sensor, and the oil sensor can be easily attached and detached.
It is easy to assemble and maintain, and not only can sealing performance be sufficiently guaranteed, but also a shortage of A1 chili oil can be detected in advance.
（２）請求項２によれば、互いに対峙する一対の電極を
オイルパン内に臨ませ、この一対の電極間の抵抗値を検
出するオイルセンサと、上記オイルセンサで検出した抵
抗値を電圧値に変換して検出する電圧検出手段と、温度
補償を行い基準電圧値を設定する基準電圧値設定手段と
、上記電圧検出手段で検出した電圧値と上記基準電圧値
設定手段で設定した基準電圧値とを比較して′ｔ１滑油
不足がどうかを判断する電圧値比較手段とを具備りるの
で、上述した効果に加え、潤滑油温度変化に伴う抵抗値
変動に応じて基準電圧値を可変設定でき、潤滑油不足を
事前により正確に検出することができるばかりか、上記
基準電圧値の設定値を変えるだけで、潤滑油不足検出レ
ベルを任意にセツティングすることができる。(2) According to claim 2, there is provided an oil sensor that has a pair of electrodes facing each other facing into the oil pan, and detects a resistance value between the pair of electrodes, and a voltage value that detects the resistance value detected by the oil sensor. a voltage detection means for converting and detecting the voltage, a reference voltage value setting means for performing temperature compensation and setting a reference voltage value, and a voltage value detected by the voltage detection means and a reference voltage value set by the reference voltage value setting means. In addition to the above-mentioned effects, the reference voltage value can be variably set in accordance with resistance fluctuations caused by changes in lubricating oil temperature. Not only can lubricant shortage be detected more accurately in advance, but also the lubricant shortage detection level can be arbitrarily set by simply changing the set value of the reference voltage value.
図面は本発明の一実施例を示し、第１図は潤滑油不足検
出装置の６１６１ブロック図、第２図はオイルセンサの
外観図、第３図は潤滑油の抵抗値と温度との特性図であ
る。
１・・・オイルパン、２・・・オイルセンサ、２ａ、２
Ｃ・・・電極、６・・・電圧検出手段、７・・・基準電
圧値設定手段、８・・・電圧値比較手段、■・・・電圧
値、Ｏ・・・基準電圧値。
第３図
オイル５１度（Ｃ’） −The drawings show an embodiment of the present invention; Fig. 1 is a 6161 block diagram of a lubricating oil shortage detection device, Fig. 2 is an external view of an oil sensor, and Fig. 3 is a characteristic diagram of lubricating oil resistance value and temperature. It is. 1... Oil pan, 2... Oil sensor, 2a, 2
C... Electrode, 6... Voltage detection means, 7... Reference voltage value setting means, 8... Voltage value comparison means, ■... Voltage value, O... Reference voltage value. Figure 3 Oil 51 degrees (C') -
Claims (2)
せ、この一対の電極間の抵抗値を検出するオイルセンサ
と、 上記オイルセンサで検出した抵抗値を電圧値に変換して
検出する電圧検出手段と、 上記電圧検出手段で検出した電圧値と基準電圧値とを比
較して潤滑油不足かどうかを判断する電圧値比較手段と
を具備することを特徴とするエンジンの潤滑油不足検出
装置。(1) An oil sensor that has a pair of electrodes facing each other facing into the oil pan and detects the resistance value between the pair of electrodes, and a voltage that converts the resistance value detected by the oil sensor into a voltage value and detects it. A lubricating oil shortage detection device for an engine, comprising: a detection means; and a voltage value comparison means that compares the voltage value detected by the voltage detection means with a reference voltage value to determine whether there is a lubricant shortage. .
せ、この一対の電極間の抵抗値を検出するオイルセンサ
と、 上記オイルセンサで検出した抵抗値を電圧値に変換して
検出する電圧検出手段と、 温度補償を行い基準電圧値を設定する基準電圧値設定手
段と、 上記電圧検出手段で検出した電圧値を上記基準電圧値設
定手段で設定した基準電圧値とを比較して潤滑油不足か
どうかを判断する電圧値比較手段とを具備することを特
徴とするエンジンの潤滑油不足検出装置。(2) An oil sensor with a pair of electrodes facing each other facing into the oil pan and detecting the resistance value between the pair of electrodes, and a voltage that converts the resistance value detected by the oil sensor into a voltage value and detects it. a detection means, a reference voltage value setting means for performing temperature compensation and setting a reference voltage value, and comparing the voltage value detected by the voltage detection means with the reference voltage value set by the reference voltage value setting means to detect the lubricating oil. A lubricating oil shortage detection device for an engine, comprising voltage value comparison means for determining whether there is a shortage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173602A JP3050561B2 (en) | 1989-07-04 | 1989-07-04 | Engine lubrication oil shortage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173602A JP3050561B2 (en) | 1989-07-04 | 1989-07-04 | Engine lubrication oil shortage detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0337315A true JPH0337315A (en) | 1991-02-18 |
| JP3050561B2 JP3050561B2 (en) | 2000-06-12 |
Family
ID=15963649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1173602A Expired - Lifetime JP3050561B2 (en) | 1989-07-04 | 1989-07-04 | Engine lubrication oil shortage detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3050561B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345068A (en) * | 1992-04-20 | 1994-09-06 | Hitachi Hometec, Ltd. | Cooking oven with rotatable and horizontally movable turntable |
| CN111441843A (en) * | 2020-05-06 | 2020-07-24 | 济南吉美乐电源技术有限公司 | Low oil pressure alarm device of gasoline engine |
| CN115452094A (en) * | 2022-09-30 | 2022-12-09 | 鑫利科技(北京)有限公司 | Electronic water level sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835610U (en) * | 1981-08-31 | 1983-03-08 | 株式会社土屋製作所 | Engine oil level warning device |
| JPS6367826U (en) * | 1986-10-20 | 1988-05-07 |
-
1989
- 1989-07-04 JP JP1173602A patent/JP3050561B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835610U (en) * | 1981-08-31 | 1983-03-08 | 株式会社土屋製作所 | Engine oil level warning device |
| JPS6367826U (en) * | 1986-10-20 | 1988-05-07 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345068A (en) * | 1992-04-20 | 1994-09-06 | Hitachi Hometec, Ltd. | Cooking oven with rotatable and horizontally movable turntable |
| CN111441843A (en) * | 2020-05-06 | 2020-07-24 | 济南吉美乐电源技术有限公司 | Low oil pressure alarm device of gasoline engine |
| CN115452094A (en) * | 2022-09-30 | 2022-12-09 | 鑫利科技(北京)有限公司 | Electronic water level sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3050561B2 (en) | 2000-06-12 |
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