EP1884557B1 - Schmierölzusammensetzung - Google Patents

Schmierölzusammensetzung Download PDF

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Publication number
EP1884557B1
EP1884557B1 EP07107472.8A EP07107472A EP1884557B1 EP 1884557 B1 EP1884557 B1 EP 1884557B1 EP 07107472 A EP07107472 A EP 07107472A EP 1884557 B1 EP1884557 B1 EP 1884557B1
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EP
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Prior art keywords
mass
lubricating oil
oil composition
composition
magnesium
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EP07107472.8A
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English (en)
French (fr)
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EP1884557A1 (de
Inventor
Robin Howard Scott
Robert William Shaw
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Infineum International Ltd
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Infineum International Ltd
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/028—Overbased salts thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/26—Overbased carboxylic acid salts
    • C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/28—Amides; Imides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/046—Overbasedsulfonic acid salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/045—Metal containing thio derivatives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/52—Base number [TBN]
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines

Definitions

  • the present invention relates to a lubricating oil composition, particularly a lubricating oil composition for use in diesel engines of the type referred to as heavy duty diesel engines, herein abbreviated to "HDD”.
  • a lubricating oil composition for use in diesel engines of the type referred to as heavy duty diesel engines, herein abbreviated to "HDD”.
  • Diesel engines comprise one or more bores in each of which a piston reciprocates.
  • the piston has piston rings around its periphery to provide a seal between the combustion chamber and the crankcase.
  • the reciprocating movement of the piston causes the piston rings to bear towards the wall of the bore with the potential to cause wear of the bore wall and the piston rings. Wear of the bore wall and the piston rings is ameliorated by ensuring, as far as possible, that a film of lubricating oil is maintained on the bore wall to avoid or reduce any direct contact between the piston rings and the bore wall.
  • the wall of the bore is formed with arrays of grooves which act to retain lubricating oil so that the formation and maintenance of a film of lubricating oil over the wall of the bore is facilitated.
  • the grooves are often formed as spiral grooves or recesses in the bore wall, and these are usually formed as two sets of grooves spiralling in opposite senses in the bore wall so that the grooves of each set overlap each other, whereby the formation and maintenance of a film of lubricating oil on the bore wall is facilitated.
  • EP 1167497A claims and describes a lubricating oil composition having a sulfur content of 0.01 to 0.3 wt. % and a phosphorus content of 0.01 to 0.1 wt. %, and giving a sulphated ash in the range of 0.1 to 1 wt. %, which comprises
  • the composition of EP 1167497A is intended to provide lubrication for all types of internal combustion engines, including diesel engines, without adversely affecting the functioning of exhaust gas particulate traps, oxidizing catalysts and/or NO x -reducing catalysts.
  • Example 3 of this patent document describes a lubricating oil composition comprising, as a metal-containing detergent, 1.7 wt. % magnesium salicylate which contains 6.0 wt. % Mg, 0.22 wt. % S; TBN 280 mg KOH/g, available as "SAP 008" from Shell Japan Co. Ltd.
  • EP1167497A does not appear to relate to heavy duty diesel engines, and is not concerned with bore polishing issues. It does not provide any disclosure or teaching having a bearing on bore polishing.
  • Example 2 of US 6423670 describes two lubricating oils, both comprising 0.256 mass % overbased Mg sulfonate, a borated dispersant, a neutral calcium phenate, a phenol antioxidant, a zinc dihydrocarbyldithiophosphate, and an overbased calcium sulfonate, and one of the oils comprising, in addition, a neutral calcium sulfonate.
  • the oils were evaluated according the procedure of the Daimler Chrysler Sequence IIIE, OM364LA diesel engine test for several characteristics, including bore polish. The oil comprising the neutral calcium sulphonate gave a poor result (5-6%) in terms of Bore Polish results. Similar oils without the neutral calcium sulfonate gave better results even when the overbased Mg sulfonate content was reduced, other factors being equal.
  • compositions of US 5320765A are claimed to reduce engine carbon deposits and to reduce rates of lubricating oil consumption.
  • the compositions according to US 5320765 A have low ash contents (less than 0.6 weight percent) in order to meet mandatory limitations on ash in engine exhaust gas.
  • the amount of basic metal detergent which can be incorporated in a lubricating oil is restricted because the metal of the detergent gives rise to ash materials which adversely affect the operation of engine equipment such as exhaust gas filters and exhaust gas purification catalysts.
  • Ash materials are assessed by mass. Thus, the mass of ash which is tolerable for an engine and its associated equipment restricts the TBN of the engine oil arising from the basic metal-containing detergents therein.
  • magnesium detergents produce a lower mass of ash than calcium detergents due to the fact that magnesium is lighter than calcium and gives rise to lighter ash.
  • lubricating oils containing relatively high concentrations of magnesium from magnesium-containing detergents can be formulated without giving rise to unacceptable levels of bore polishing or unacceptable levels of ash in diesel engines, including HDDs.
  • a method of reducing bore polishing in a heavy duty diesel engine comprises lubricating the engine with a lubricating oil composition as defined in the first aspect.
  • the base oil is an oil of lubricating viscosity and may have characteristics in the following ranges:
  • the base oil contains one or more of Groups I, II, III or IV base stocks as defined in API Engine Oil Licensing and Certification System (EOLCS), Industry Services Department, 14th edition, December 1996 , Addendum 1, December 1998 and ATIEL code.
  • the base oil sulphur content may be between 0.00 and 1.00 wt.% and the KV @100°C may be from 3.8 mm 2 /s to 21.9 mm 2 /s. More preferably the base oil sulphur content may be from 0.00 to 0.80 wt.% and the KV @100°C may be from 3.8 mm 2 /s to 8.0 mm 2 /s.
  • the one or more antioxidant components provide at least 0.75 mass % of the lubricating oil compositions based upon the total mass of the lubricating oil composition.
  • the one or more antioxidant components comprise up to 3.0 mass % of the lubricating oil composition based upon the total mass of the lubricating oil composition.
  • the one or more antioxidant components suitably provide up to 2.75 mass % of the lubricating oil composition, based upon the total mass of the lubricating oil composition.
  • the overbased magnesium compound provides the composition with greater than 0.05 mass % Mg, based upon the mass of the composition.
  • the magnesium compound provides the composition with at least 0.06 mass % Mg, based on the mass of the composition.
  • the magnesium compound may provide the composition with at least 0.063 mass % Mg, based upon the mass of the composition.
  • the overbased magnesium compound provides the composition with no more than 0.3 mass % Mg, based upon the mass of the composition.
  • the Mg content of the composition is suitably up to 0.15 mass %, based upon the mass of the composition.
  • the composition suitably comprises up to 0.14 mass % Mg from the magnesium compound, based upon the total mass of the composition.
  • Lubricating compositions may have a TBN (total base number as determined by ASTM D2896) of at least 8.0, preferably 9.0 or higher.
  • the maximum TBN is not likely to exceed 20.0, and 15.0 may be regarded as a practical maximum TBN for many compositions.
  • Lubricating compositions comprise phosphorus moieties.
  • Lubricating compositions include antiwear components such as one or more salts of one or more dihydrocarbyldithiophosphoric acids.
  • a typical salt of a dihydrocarbyldithiophosphoric acid employed as an antiwear component is zinc dihydrocarblydithiophosphate, ZDDP.
  • the lubricating compositions may comprise phosphorus moieties from other components, such as certain phosphites which may be employed as antiwear components.
  • Phosphorus may be present in the lubricating compositions (e.g. from ZDDP) in amounts up to 2000 ppm by mass.
  • the maximum phosphorus level is preferably lower, e.g.
  • the amount of phosphorous provided by the metal hydrocarbyl dithiophosphate is in the range of 0.05 to 0.20 mass %, based on the mass of the composition.
  • the sulphated ash content of the lubricating oil composition is at least 0.6 mass %, based upon the mass of the composition.
  • the lubricating oil composition suitably has a sulphated ash content of at least 0.8 mass %, based on the mass of the composition.
  • a lubricating oil composition according to the present invention suitably has a sulphated ash content of no lower than 1.0 mass %.
  • a lubricating oil composition according to the present invention has a sulphated ash content of not more than 2.0 mass % based on the total mass of the composition.
  • a lubricating oil composition according to the present invention may have a sulphated ash content no greater than 1.6 mass %, preferably no greater than 1.5 mass %, and more preferably no greater than 1.2 mass % based on the mass of the composition.
  • compositions also included components which are usually included in HDD lubricant compositions, such as one or more of the following: friction modifier, viscosity modifier, antifoamant, demulsifier, pour point depressant (inter alia ). Since these components are well-known and are not believed to be significant in relation to the bore-polishing benefits of the lubricating compositions of the invention, they will not be further discussed herein.
  • Lubricant oil compositions suitable for use with HDDs were formulated from the components (i) to (v) mentioned above, together with other well-known lubricant oil components.
  • the oils were formulated in the well-known manner to have viscosity characteristics of 10W-40 or 15W-40.
  • the lubricant viscosity was SAE 40 grade and all samples had an approximately equal kinematic viscosity at 100°C, thereby factoring out base stock effects and giving a robust comparison between the samples.
  • the compositions had varied concentrations of the following components: the calcium and magnesium detergents, the dispersant, the antioxidant, and the ZDDP antiwear component.
  • oil samples 1, 2 and 3 are illustrative of compositions having low magnesium contents and low antioxidant contents.
  • the magnesium contents are in the range of 0.26 to 0.29 mass %.
  • the antioxidant contents are in the range of 0.30 to 0.42 mass %.
  • the other components of these three samples are in concentrations which do not significantly affect the Bore Polish test results. A skilled person would know how to adjust the concentrations of the other components to achieve this effect. It is seen that the compositions all have bore polish results below the maximum limit (2.0) and that therefore, all of the samples 1, 2 and 3 pass the Bore Polish test.
  • Samples 12 which comprises 0.057 mass % Ca and 0.134 mass % Mg gave rise to 1.0 mass % sulphated ash, lower than the sulphated ash obtained with the low and the high Mg oils of Samples 4, 5, 7 and 8.
  • Sample 13, comprising 0.170 mass % Ca and 0.138 mass % Mg, gave rise to 1.4 mass % sulphated ash, no higher than the ash obtained with low Mg Samples 1 and 3 and high Mg Samples 4 and 5, which all contain relatively higher levels of calcium that Samples 13.
  • oil compositions of sample No 9 to 14 provide excellent performance in terms of bore polishing results without giving rise to unacceptable levels of sulphated ash.

Claims (17)

  1. Verwendung einer Antioxidanskomponente in Kombination mit einer Detergenskomponente, die eine überbasische Magnesiumverbindung ist, in einer Schmierölzusammensetzung bei der Schmierung eines Schwerlastdieselmotors, um Zylinderbohrungsabschleifen in dem Dieselmotor zu vermindern, das durch die Anwesenheit der Magnesium enthaltenden Komponente in der Schmierölzusammensetzung verursacht wird und ohne dass dies nicht akzeptable hohe Mengen an Sulfatasche zur Folge hat, wobei: die Antioxidanskomponente ausgewählt ist aus einer oder mehreren aschefreien aminischen und/oder schwefelfreien Phenolverbindungen, die in einer Menge von mindestens 0,75 Masse% und bis zu 3,0 Masse% vorliegen, bezogen auf die gesamte Masse der Schmierölzusammensetzung, und wobei die überbasische Magnesiumverbindung eine Gesamtbasenzahl (TBN) aufweist, die 350 mg/g KOH überschreitet und ausgewählt ist aus einem oder mehreren Magnesiumsulfonaten, Magnesiumsalicylaten, Magnesiumphenaten, die die Schmierölzusammensetzung mit mehr als 0,05 Masse% Magnesium ausstatten, bezogen auf die Masse der Schmierölzusammensetzung, und wobei die Schmierölzusammensetzung einen Sulfataschegehalt von mindestens 0,6 Masse% und nicht mehr als 2,0 Masse% aufweist, wie mittels ASTM D874 bestimmt, und wobei die Schmierölzusammensetzung ein Schmierölbasismaterial mit Schmierviskosität und eine oder mehrere Kohlenwasserstoffdithiophosphatverbindungen in einer Menge von bis zu 1,8 Masse% umfasst.
  2. Verwendung nach Anspruch 1, bei der die überbasische Magnesiumverbindung die Schmierölzusammensetzung mit nicht mehr als 0,3 Masse% Magnesium ausstattet, bezogen auf die Masse der Zusammensetzung.
  3. Verwendung nach Anspruch 1 oder Anspruch 2, bei der die überbasische Magnesiumverbindung die Schmierölzusammensetzung mit nicht mehr als 0,06 Masse% Magnesium ausstattet, bezogen auf die Masse der Zusammensetzung.
  4. Verwendung nach einem der Ansprüche 1 oder 3, bei der der Magnesiumgehalt der Schmierölzusammensetzung nicht 0,3 Masse% überschreitet, bezogen auf die Masse der Zusammensetzung.
  5. Verwendung nach einem der vorhergehenden Ansprüche, bei der die Schmierölzusammensetzung ein oder mehrere Dispergiermittel umfasst.
  6. Verwendung nach Anspruch 5, bei der das bzw. die Dispergiermittel ein oder mehrere Stickstoff enthaltende Dispergiermittel einschließen.
  7. Verwendung nach Anspruch 6, bei der der Stickstoffgehalt, der durch das bzw. die Stickstoff enthaltende(n) Dispergiermittel zur Verfügung gestellt wird, mindestens 0,07 Masse% beträgt, bezogen auf die Masse der Zusammensetzung.
  8. Verwendung nach Anspruch 7, bei der der Stickstoffgehalt, den das bzw. die Stickstoff enthaltende(n) Dispergiermittel zur Verfügung stellen, im Bereich von 0,07 bis 0,25 Masse% liegt, bezogen auf die Masse der Zusammensetzung.
  9. Verwendung nach einem der Ansprüche 1 bis 8, bei der die Antioxidanskomponente bzw. die Antioxidanskomponenten nur aus aschefreien Antixoidansverbindungen bestehen.
  10. Verwendung nach einem der Ansprüche 1 bis 9, bei der die Schmierölzusammensetzung einen Sulfataschegehalt von nicht weniger als 0,8 Masse% aufweist, bezogen auf die Masse der Zusammensetzung.
  11. Verwendung nach Anspruch 10, bei der die Schmierölzusammensetzung einen Sulfataschegehalt von nicht weniger als 1, 0 Masse% aufweist, bezogen auf die Masse der Zusammensetzung.
  12. Verwendung nach einem der Ansprüche 1 bis 11, bei der die Schmierölzusammensetzung einen Sulfataschegehalt von nicht größer als 1,6 Masse% aufweist, bezogen auf die Masse der Zusammensetzung.
  13. Verwendung nach einem der Ansprüche 1 bis 12, bei der die Schmierölzusammensetzung eine Gesamtbasenzahl von mindestens 8,9 mg KOH/g aufweist, wie mittels ASTM D2896 gemessen.
  14. Verwendung nach Anspruch 13, bei der die Schmierölzusammensetzung eine Gesamtbasenzahl von mindestens 9,0 mg KOH/g aufweist, wie mittels ASTM D2896 gemessen.
  15. Verwendung nach einem der vorhergehenden Ansprüche, bei der die Detergenskomponente ferner eine Calciumdetergenskomponente einschließt.
  16. Verwendung nach einem der vorhergehenden Ansprüche, bei der die Detergenskomponente Salicylatdetergens umfasst.
  17. Verwendung nach einem der vorhergehenden Ansprüche, bei der der Phosphatgehalt der Schmierölzusammensetzung im Bereich von 200 bis 800 ppm liegt.
EP07107472.8A 2006-07-20 2007-05-03 Schmierölzusammensetzung Active EP1884557B1 (de)

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EP07107472.8A EP1884557B1 (de) 2006-07-20 2007-05-03 Schmierölzusammensetzung

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EP1884557B1 true EP1884557B1 (de) 2021-03-31

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US8513169B2 (en) * 2006-07-18 2013-08-20 Infineum International Limited Lubricating oil compositions
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CN112442413B (zh) * 2019-08-30 2022-09-16 中国石油化工股份有限公司 一种高清净性发动机油组合物及其制备方法

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Publication number Priority date Publication date Assignee Title
EP1167497A2 (de) * 2000-06-02 2002-01-02 Chevron Oronite Japan Limited Schmierölzusammensetzung für Dieselmotoren
EP1661970A1 (de) * 2004-11-30 2006-05-31 Infineum International Limited Schmierölzusammensetzungen

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