JP2010242644A - Method and device for maintaining performance of lubricating oil for alcoholic fuel engine - Google Patents

Method and device for maintaining performance of lubricating oil for alcoholic fuel engine Download PDF

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JP2010242644A
JP2010242644A JP2009093209A JP2009093209A JP2010242644A JP 2010242644 A JP2010242644 A JP 2010242644A JP 2009093209 A JP2009093209 A JP 2009093209A JP 2009093209 A JP2009093209 A JP 2009093209A JP 2010242644 A JP2010242644 A JP 2010242644A
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lubricating oil
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Kosuke Fujimoto
公介 藤本
Toyoji Kaneko
豊治 金子
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress a deterioration of the wear performance of lubricating oil caused by inclusion of water by using an engine lubricating oil of versatile type, without using a lubricating oil to be exclusively devoted to alcoholic fuel. <P>SOLUTION: A method and device for maintaining the performance of a lubricating oil for an engine using an alcoholic fuel comprises the step to determine the sort of the fuel on the basis of an engine control signal and the step to compare the measured temperature of the engine cooling water with the prescribed temperature in case the result from determination is that an alcoholic fuel is in use, to be followed by another step to add ethanol to the engine oil if the cooling water temperature is determined as the prescribed level or below. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、エタノール等のアルコール系燃料を使用する自動車用エンジンにおいて、燃料中の水分による潤滑油の性能劣化を防止する方法および装置に関する。   The present invention relates to a method and an apparatus for preventing performance deterioration of a lubricating oil due to moisture in fuel in an automobile engine using an alcohol-based fuel such as ethanol.

アルコール燃料の燃焼により生成する多量の水により、エンジンオイルの磨耗防止性能が低下する問題が知られており、その対策として、例えば、特許文献１は、鉱油及び／又は合成油基油に対して、（ｉ）チオりん酸亜鉛系磨耗防止剤、（ii）無灰型防錆剤、を配合してなることを特徴とするアルコールエンジン用潤滑油組成物、を開示している。   There is a known problem that the wear resistance of engine oil decreases due to a large amount of water generated by the combustion of alcohol fuel. For example, Patent Document 1 discloses a countermeasure against mineral oil and / or synthetic oil base oil. And (i) a zinc thiophosphate antiwear agent, and (ii) an ashless rust inhibitor, and a lubricating oil composition for an alcohol engine.

特開平５−７０７８６号公報JP-A-5-70786

特許文献１が提案するようなアルコール燃料専用の潤滑油を用いるのではなく、汎用のエンジン用潤滑油の使用を前提とする新たな解決策が課題となっており、本発明は、この課題を解決しようとしてなされたものである。   Instead of using a dedicated lubricant for alcohol fuel as proposed in Patent Document 1, a new solution based on the use of a general-purpose engine lubricant is an issue, and the present invention addresses this issue. It was made to solve.

上記の課題を解決するため、本発明のアルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法は、エンジン制御信号に基づいて燃料の種類を判断する燃料判断ステップと、前記判断により、アルコール系燃料を使用していると判断した場合、エタノールをエンジンオイルに添加するエタノール添加ステップを備えたことを特徴とする。   In order to solve the above problems, a method for maintaining the performance of the lubricating oil of an engine using an alcohol-based fuel according to the present invention includes a fuel determination step for determining the type of fuel based on an engine control signal, When it is determined that an alcohol-based fuel is used, an ethanol addition step of adding ethanol to the engine oil is provided.

また、本発明のアルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法は、上記燃料判断ステップの後に、計測した水温（冷却水温度）と所定の温度とを比較するステップを設け、前記所定の温度以下であると判断した場合にのみ前記エタノール添加ステップに進むことを特徴とする。   Further, the method for maintaining the performance of the lubricating oil of the engine using the alcohol-based fuel of the present invention includes a step of comparing the measured water temperature (cooling water temperature) with a predetermined temperature after the fuel determination step. Only when it is determined that the temperature is equal to or lower than the predetermined temperature, the process proceeds to the ethanol addition step.

また、本発明のアルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法は、前記燃料判断ステップにより、１００％のエタノール燃料を使用していると判断した場合、該燃料をエンジンオイルに添加するエタノール添加ステップにおいて、前記燃料を添加することを特徴とする。   Further, in the method for maintaining the performance of the engine lubricating oil using the alcohol-based fuel of the present invention, when it is determined in the fuel determining step that 100% ethanol fuel is used, the fuel is used as the engine oil. In the adding ethanol step, the fuel is added.

本発明のアルコール系燃料を使用するエンジンの潤滑油の性能を維持する装置は、上記の方法を使用することを特徴とする。   An apparatus for maintaining the performance of engine lubricating oil using the alcohol-based fuel of the present invention is characterized by using the above method.

本発明のアルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法および装置によれば、アルコール系燃料の燃焼により生成された水がエンジンオイルに混入しても、エタノールの潤滑作用により、エンジンオイルの磨耗性能が低下することを防止できるので、アルコール系燃料のエンジン用の専用のエンジンオイルを用いる必要がなく、コスト的に有利である。   According to the method and apparatus for maintaining the performance of the lubricating oil of the engine using the alcohol fuel of the present invention, even if water generated by the combustion of the alcohol fuel is mixed into the engine oil, Since it is possible to prevent the wear performance of the engine oil from deteriorating, it is not necessary to use a dedicated engine oil for an alcohol fuel engine, which is advantageous in terms of cost.

また、エンジン冷却水の温度を計測することにより、エンジンオイルに水分の混入がよく起る低温時を特定して、エタノールを添加するので、エタノール添加の上記効果を維持しつつ、エタノールの使用量を節減することができる。   In addition, by measuring the temperature of the engine cooling water, ethanol is added by specifying the low temperature when water is often mixed into the engine oil, so the amount of ethanol used while maintaining the above effects of ethanol addition Can be saved.

また、１００％のエタノール燃料を使用している場合には、エタノール燃料を直接、エンジンオイルに添加することができるので、効率的に上記効果を奏することができる。   In addition, when 100% ethanol fuel is used, ethanol fuel can be added directly to the engine oil, so that the above effect can be achieved efficiently.

エンジンオイル中のエタノールと水の混合条件と磨耗痕径の関係を示す。The relationship between the mixing conditions of ethanol and water in engine oil and the wear scar diameter is shown. 本発明のアルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法のフローチャートを示す。2 shows a flowchart of a method for maintaining the performance of an engine lubricating oil using the alcohol-based fuel of the present invention.

表１は、エンジンオイルにエタノールおよび水を混合して、エンジンオイルの磨耗防止性能の変化を、シェル４球式耐磨耗試験により評価した結果を示す。シェル４球式耐磨耗試験は、潤滑油中に置いた１個の回転球に三点接触するように３個の固定球を配置して、磨耗痕径を測定するものであり、ここでは、油温８０℃、荷重３０kgf、回転速度１２００rpm、試験時間９０min、という条件で行われた試験結果である。   Table 1 shows the results of evaluating the change in the anti-wear performance of the engine oil by mixing the engine oil with ethanol and water by a shell four-ball wear resistance test. In the 4-ball shell wear resistance test, three fixed spheres are placed in contact with a single rotating sphere placed in lubricating oil and the wear scar diameter is measured. The test results were conducted under the conditions of an oil temperature of 80 ° C., a load of 30 kgf, a rotation speed of 1200 rpm, and a test time of 90 min.

表１において、丸数字４、５、６は、いずれもオイルの割合は９０％であり、希釈率としては１０％となるが、水のみである丸数字５が最も高い磨耗痕径を示し、オイルの耐摩耗性が最も悪化している。また、丸数字６は、水がないものであるが、最も低い磨耗痕径を示し、オイルの耐摩耗性が最も良好である。   In Table 1, the circled numbers 4, 5, and 6 all have a ratio of oil of 90% and the dilution rate is 10%, but the circled number 5 that is only water indicates the highest wear scar diameter, The wear resistance of oil is the worst. In addition, the circled number 6 has no water, but shows the lowest wear scar diameter, and the wear resistance of the oil is the best.

さらに、丸数字２と５を比較してみると、丸数字２はより多くの水を含むにもかかわらず、磨耗痕径は低い数値を示している。これは、エタノールに潤滑作用があることの影響であると考えられる。   Further, when comparing the round numbers 2 and 5, the round number 2 shows a low value of the wear scar diameter even though it contains more water. This is considered to be due to the fact that ethanol has a lubricating action.

Figure 2010242644
Figure 2010242644

以上のとおり、エンジンオイルに水の混入があると、耐摩耗性が悪化するが、エタノールの混入によりそれを抑制できることが示されている。   As described above, it has been shown that when engine oil contains water, wear resistance deteriorates, but it can be suppressed by mixing ethanol.

本発明の実施例１は、図２のフローチャートに示された方法と、その方法を用いた装置である。
エンジンコントロールユニットからのＥＣＵ信号を読み取り、該ＥＣＵ信号に基づいて、使用されている燃料が１００％のエタノール燃料（E100）であるか否かを判断する。この判断結果がＮＯの場合には、通常制御に向かう。 The first embodiment of the present invention is a method shown in the flowchart of FIG. 2 and an apparatus using the method.
An ECU signal from the engine control unit is read, and based on the ECU signal, it is determined whether or not the fuel being used is 100% ethanol fuel (E100). If the result of this determination is NO, the control goes to normal control.

一方、この判断結果がＹＥＳの場合、すなわち使用燃料がE100の場合には、次のエンジン冷却水の温度を計測し、該計測温度が所定の温度以下であるか否かを判断する。この判断結果がＮＯの場合には、通常制御に向かう。   On the other hand, when the determination result is YES, that is, when the fuel used is E100, the temperature of the next engine cooling water is measured to determine whether or not the measured temperature is equal to or lower than a predetermined temperature. If the result of this determination is NO, the control goes to normal control.

これに対し、この判断結果がＹＥＳの場合、すなわちエンジン冷却水の計測温度が所定の温度以下である場合に、潤滑油中にエタノール燃料（E100）を噴射する。   On the other hand, when the determination result is YES, that is, when the measured temperature of the engine coolant is equal to or lower than a predetermined temperature, ethanol fuel (E100) is injected into the lubricating oil.

上記のエンジンオイル中の水分および添加されたエタノールは、エンジンオイルの温度が上昇すると蒸発するので、エタノール・水含有量が低下し、オイル性状が元に戻る結果となる。   The water in the engine oil and the added ethanol evaporate when the temperature of the engine oil rises, so that the ethanol / water content is reduced and the oil properties are restored.

本発明の実施例２は、次のステップから成る方法と、その方法を用いた装置である。
エンジンコントロールユニットからのＥＣＵ信号を読み取り、該ＥＣＵ信号に基づいて、使用されている燃料がアルコール系燃料であるか否かを判断する。この判断結果がＮＯの場合には、通常制御に向かう。 The second embodiment of the present invention is a method including the following steps and an apparatus using the method.
An ECU signal from the engine control unit is read, and based on the ECU signal, it is determined whether or not the fuel being used is alcohol fuel. If the result of this determination is NO, the control goes to normal control.

一方、この判断結果がＹＥＳの場合、すなわち使用燃料がアルコール系燃料である場合には、次にエンジン冷却水の温度を計測し、該計測温度が所定の温度以下であるか否かを判断する。この判断結果がＮＯの場合には、通常制御に向かう。   On the other hand, if the determination result is YES, that is, if the fuel used is alcohol-based fuel, the temperature of the engine coolant is then measured to determine whether the measured temperature is equal to or lower than a predetermined temperature. . If the result of this determination is NO, the control goes to normal control.

これに対し、この判断結果がＹＥＳの場合、すなわちエンジン冷却水の計測温度が所定の温度以下である場合に、潤滑油中にエタノール燃料を噴射する。   On the other hand, when the determination result is YES, that is, when the measured temperature of the engine coolant is equal to or lower than a predetermined temperature, ethanol fuel is injected into the lubricating oil.

なお、上記のステップのうち、エンジン冷却水の温度を計測し、該計測温度が所定の温度以下であるか否かを判断するステップは省略してもよい。   Of the above steps, the step of measuring the temperature of the engine coolant and determining whether the measured temperature is equal to or lower than a predetermined temperature may be omitted.

以上のとおり、エタノール燃料（E100）は、燃料の相分離を起こさないために、水分を除去しておらず数％の水分を含むので、エタノールと共に水がエンジンオイル中に混入し、エンジンオイルが特に低温の時に、水の存在がエンジンオイルの磨耗悪化の原因となるが、エタノールの添加によりエタノール濃度を上昇させることにより、磨耗悪化を抑制するのである。   As described above, since ethanol fuel (E100) does not cause phase separation of fuel, it does not remove moisture and contains several percent of moisture, so water is mixed into the engine oil together with ethanol. Particularly at low temperatures, the presence of water causes deterioration of engine oil wear, but by increasing the ethanol concentration by adding ethanol, the deterioration of wear is suppressed.

１００％のエタノール燃料（E100）以外のアルコール系燃料を使用する場合、ガソリンを含んでいるので、燃料をそのまま添加すると潤滑油の劣化促進が懸念されるため、エタノールを添加するのが好ましい。   When using an alcohol-based fuel other than 100% ethanol fuel (E100), since gasoline is included, there is a concern about the acceleration of deterioration of the lubricating oil if the fuel is added as it is, so it is preferable to add ethanol.

Claims (4)

エンジン制御信号に基づいて燃料の種類を判断する燃料判断ステップと、
前記判断により、アルコール系燃料を使用していると判断した場合、エタノールをエンジンオイルに添加するエタノール添加ステップに進む、アルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法。 A fuel determination step for determining the type of fuel based on the engine control signal;
A method for maintaining the performance of the lubricating oil of the engine using the alcohol-based fuel, which proceeds to the ethanol addition step of adding ethanol to the engine oil when it is determined by the above determination that the alcohol-based fuel is used. 請求項１に記載された方法において、
前記燃料判断ステップの後に、計測したエンジン冷却水の温度と所定の温度とを比較するステップを設け、前記所定の温度以下であると判断した場合にのみ前記エタノール添加ステップに進む、アルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法。 The method of claim 1, wherein
After the fuel determination step, a step of comparing the measured engine coolant temperature with a predetermined temperature is provided, and the alcohol-based fuel is advanced to the ethanol addition step only when it is determined that the temperature is equal to or lower than the predetermined temperature. A method of maintaining the performance of the engine lubricant used. 請求項１に記載された方法において、
前記燃料判断ステップにより、１００％のエタノール燃料を使用していると判断した場合、前記エタノール添加ステップにおいて、前記燃料をエンジンオイルに添加する、アルコール系燃料を使用するエンジンの潤滑油の性能を維持する方法。 The method of claim 1, wherein
When it is determined in the fuel determination step that 100% ethanol fuel is used, the fuel is added to the engine oil in the ethanol addition step, and the performance of the lubricating oil of the engine using the alcohol fuel is maintained. how to. 請求項１〜３に記載された方法を使用する、アルコール系燃料を使用するエンジンの潤滑油の性能を維持する装置。   An apparatus for maintaining the performance of engine lubricating oil using alcohol-based fuels using the method of claims 1-3.
JP2009093209A 2009-04-07 2009-04-07 Method and apparatus for maintaining performance of lubricating oil for alcohol fuel engine Expired - Fee Related JP4760944B2 (en)

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BRPI1002378-0A BRPI1002378A2 (en) 2009-04-07 2010-04-07 METHOD AND DEVICE FOR MAINTAINING ANTI-WEAR ENGINE LUBRICANT PERFORMANCE USING AN ALCOHOL-BASED FUEL, AND AN ENGINE LUBRICANT USING A FUEL-BASED ENGINE

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JP2015059502A (en) * 2013-09-18 2015-03-30 株式会社豊田中央研究所 Internal combustion engine and automobile
JP2016200021A (en) * 2015-04-07 2016-12-01 トヨタ自動車株式会社 Control device for engine
KR20190008671A (en) * 2017-07-17 2019-01-25 현대자동차주식회사 Apparatus for recognition fuel type, fuel pump controlling system having the same and method thereof

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JPH04234543A (en) * 1990-12-28 1992-08-24 Honda Motor Co Ltd Engine speed controller of internal combustion engine
JPH0570786A (en) * 1991-02-18 1993-03-23 Tonen Corp Lubricating oil composition for alcohol engine
JP2008095662A (en) * 2006-10-16 2008-04-24 Toyota Motor Corp Air-fuel ratio control device
JP2008144723A (en) * 2006-12-13 2008-06-26 Toyota Motor Corp Control device for internal combustion engine
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Publication number Priority date Publication date Assignee Title
JP2015059502A (en) * 2013-09-18 2015-03-30 株式会社豊田中央研究所 Internal combustion engine and automobile
JP2016200021A (en) * 2015-04-07 2016-12-01 トヨタ自動車株式会社 Control device for engine
RU2620469C1 (en) * 2015-04-07 2017-05-25 Тойота Дзидося Кабусики Кайся Control device for internal combustion engine
KR20190008671A (en) * 2017-07-17 2019-01-25 현대자동차주식회사 Apparatus for recognition fuel type, fuel pump controlling system having the same and method thereof
KR102348119B1 (en) 2017-07-17 2022-01-07 현대자동차주식회사 Apparatus for recognition fuel type, fuel pump controlling system having the same and method thereof

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