WO2012066575A1 - Boîte d'engrenages haute performance avec intervalle entre vidanges amélioré pour véhicules commerciaux utilitaires lourds et procédé pour produire celle-ci - Google Patents

Boîte d'engrenages haute performance avec intervalle entre vidanges amélioré pour véhicules commerciaux utilitaires lourds et procédé pour produire celle-ci Download PDF

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Publication number
WO2012066575A1
WO2012066575A1 PCT/IN2011/000796 IN2011000796W WO2012066575A1 WO 2012066575 A1 WO2012066575 A1 WO 2012066575A1 IN 2011000796 W IN2011000796 W IN 2011000796W WO 2012066575 A1 WO2012066575 A1 WO 2012066575A1
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WO
WIPO (PCT)
Prior art keywords
lubricant
oil
high performance
oils
viscosity
Prior art date
Application number
PCT/IN2011/000796
Other languages
English (en)
Inventor
S.S.V. Ramakumar
V.K. Bathla
R.T. Mookken
K.P. Naithani
R.K Malhotra
Anand Verma
S Ravishankar
S Venkateshan
Original Assignee
Indian Oil Corporation Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Indian Oil Corporation Ltd. filed Critical Indian Oil Corporation Ltd.
Publication of WO2012066575A1 publication Critical patent/WO2012066575A1/fr

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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
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • 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
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • C10M2219/022—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of hydrocarbons, e.g. olefines
    • 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
    • C10M2223/047—Thioderivatives not containing metallic elements
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • 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
    • C10N2030/02—Pour-point; Viscosity index
    • 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
    • C10N2030/08—Resistance to extreme temperature
    • 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
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • 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
    • C10N2030/36—Seal compatibility, e.g. with rubber
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/72—Extended drain
    • 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
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives

Definitions

  • the invention relates to lubricant oils in general, and to a novel gearbox lubricant for heavy duty commercial vehicles with enhanced drain interval in particular.
  • the gearbox lubricant according to the present invention is a high performance lubricant which retains its original viscosity even after use and offers change of gearbox lubricant at intervals of 80,000 kms in comparison with the prior art norm of about 40,000 kms for similar applications.
  • gearbox lubricants should ideally have the same drain interval as the engine lubricants so that they can be changed together. This will result in considerably reduced downtime for the vehicles, as change of engine lubricant and gearbox lubricant can be done at the same time. Presently each calls for a separate vehicle downtime.
  • thermo-oxidative stability and viscosity-temperature balance of the lubricant need to be optimized to withstand the rising operational temperatures of gearboxes of commercial vehicles over longer periods of operation.
  • mineral oil based formulations dominate the market because of the price sensitivity of buyers.
  • thermo-oxidative stability and viscosity-temperature balance leading to longer lubricant drain intervals in a mineral oil platform.
  • the gearbox lubricants for heavy duty commercial vehicles known in the prior art usually have a drain interval of about 40,000 kms for typical city stop-and-go operations.
  • the present invention discloses a high performance gearbox lubricant that has a drain interval of 80,000 kms, which matches with the drain interval of the engine lubricant and makes it possible to change both lubricants together.
  • US Application US20090062163A1 discloses a gearbox lubricant which is a composition made from isomerised base oil having less than 0.05% aromatics and additives. It has a viscosity range between 6.5 cSt and 15.5 cSt. It does not disclose any drain interval.
  • the present invention provides a gear oil lubricant which offers drain interval of 80,000 kms, and lower change in viscosity.
  • EP Patent number EP578435B1 and EP767236B1 disclose gear oil lubricants with improved frictional characteristics in which the base oil is, or contains a significant quantity of, a synthetic oil such as a polyalpha-olefin oil (PAO) or a synthetic ester oil. It discloses a gear oil lubricant with a broader viscosity range.
  • the inventions are directed to a lubricant suitable for manual transmission motor vehicles. However these inventions are directed primarily to improving the friction properties of the lubricants whereas the present invention provides gear oil lubricant which has high degree of thermo-oxidative stability leading to increased drain intervals.
  • EP patent EP1669436A1 discloses a gear oil lubricant composition which is suitable for use in heavy duty truck vehicles which are operated for at least 30,000 kms between lubricant drain intervals. Viscosity increase of less than 100% has been claimed. However, the present invention discloses a gear oil lubricant which offers drain interval of 80,000 kms, and very low change in viscosity.
  • EP patent EP1739159A2 discloses a transmission fluid composition, which is suitable for continuously variable transmission / dual clutch transmission / automatic or manual transmissions.
  • the fluid composition comprises maximum amount of a base oil and minimum amount of additive composition wherein the additive composition comprises alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, phosphorylated succinimide, tertiary fatty amine, and ethoxylated alcohol, in respective amounts effective for providing sustained anti-NVH durability upon aging in a power transmission, which is lubricated.
  • the present invention provides gear oil lubricant which offers very high drain intervals of 80,000 kms, and very low change in viscosity.
  • the main aim of the invention is to provide a gearbox lubricant for heavy duty commercial vehicles with city start-and-go operation, which has a drain interval of 80,000 kms.
  • This oil composition has also been termed as “candidate oil” in this specification.
  • Another aim of the invention is to match the drain interval of the gear lubricant with that of the engine lubricant so that they can be changed at the same time and the downtime of the vehicle for change of lubricants can be minimized.
  • Yet another aim is to balance thermo-oxidative stability and optimize viscosity- temperature of the lubricant to withstand the ever rising operational temperatures of gearboxes of commercial vehicles which have longer periods of operations.
  • a further aim of the invention is to ensure cross compatibility of the candidate oil with similar lubricants from other sources/chemistries to eliminate the possibility of separation of the additives and their sedimentation in case of mix-up of the lubricants.
  • Another aim is to provide a gearbox lubricant which results in cleaner gear boxes with high degree of deposit control and which can be classified as "Clean Gear Lubricant”.
  • Yet another aim is to provide a gearbox lubricant which has a high degree of thermooxidative stability.
  • Another aim is to provide a gearbox lubricant which has extremely good EP/Anti- wear and pitting protection under low speed/high torque and non steady-state conditions, which are associated with typical city stop-and-go operations.
  • a further aim of the invention is to provide a process for producing the candidate oil.
  • a novel high performance gearbox lubricant oil composition for heavy duty commercial vehicles and the process for producing the composition are disclosed.
  • the composition has superior anti-wear, EP (Extreme Pressure) properties and is fortified with high degree of thermo-oxidative stability leading to longer drain intervals.
  • the drain interval for the candidate oil is 80,000 kms, which is roughly double that of similar oils known in the prior art. Extensive field trials of the candidate oil conducted after laboratory testing have established these parameters. Visual examination of the gearbox components at the end of the trials have corroborated the test results obtained during the laboratory evaluations.
  • composition is prepared by a process of mechanical stirring and controlled heating of lubricating oil base stock and additives, both of which are of specified category and proportion.
  • the candidate oil is fully compatible with oils from other sources meant for similar applications to eliminate the possibility of separation and sedimentation of the additives in case of a mix-up of such oils.
  • Fig. 1A to Fig. ID show the photographs of various transmission parts of the heavy duty vehicles after the trial period during which the vehicles were run with the gear box lubricant of the present invention.
  • Fig. 1 A shows Sliding Gears
  • Fig. IB shows Spur Gears
  • Fig. 1C shows Bearings
  • Fig. ID shows Helical Gears
  • Fig. 2A Oil mixture containing candidate oil and other oil after heating to the target temperature
  • Fig. 2B Oil mixture containing candidate oil and other oil after 24 hrs of heating to the target temperature - no separation/sedimentation, color change or haziness
  • Fig. 3 shows the viscosity trend of field trial samples (X-Axis: Kms; Y-Axis: Vis. @100 °C in cSt)
  • Fig. 4 shows Fe build up of field trial samples (X-Axis: Kms; Y-Axis: Fe content in ppm)
  • Fig. 5 shows the Cu build up of field trial samples (X-Axis: Kms; Y-Axis: Cu content in ppm)
  • Fig. 6 shows the TAN build up of field trial samples (X-Axis: Rms; Y-Axis: TAN in mgKOH/gm)
  • the present invention discloses a high performance gearbox lubricant with enhanced drain interval for heavy duty commercial vehicles.
  • a process for making the lubricant is also disclosed.
  • the gearbox lubricant according to the present invention is composed of a base oil and a set of additive combinations.
  • One base oil is a solvent extracted, dewaxed, hydrofinished paraffinic base oil belonging to API -Gp-I category having viscosity of 27-34 cSt at 100 °C and viscosity index value of 90- 100 units.
  • the second base oil is a catalytically hydrocracked, highly paraffinic API Gp-II base oil having a viscosity range of 8-12 cSt at 100 °C and viscosity index value in the range of 100- 120 units.
  • a set of additive combination as described below is added to the base oil to obtain the candidate oil.
  • the set of additive combination comprises of the following:
  • anti-wear additive comprising alkyl dithio phosphate, alkyl phosphonate and alkyl phosphate with alkyl chain length varying from C6-C10 carbon distribution in the range of 0.90- 1.80 wt%
  • anti-wear additive comprising a long chain alkyl amine with alkyl chain length varying from C16-C20 in the concentration range of 0.075-0.19 wt%
  • anti-oxidant additive comprising a cyclic pentadiene with minimum two aromatic rings in the concentration range of 150-250 ppm
  • the gearbox lubricant according to the invention is prepared by a process of mechanical stirring and controlled heating of lubricating oil base stock of specified category and proportion and additives, which are also of specified category and proportion.
  • the steps of the process are as follows:
  • Requisite amount of base oil(s) is charged into a blending kettle and heated up to 70-80 °C for 30-45 minutes to de-moisturize the contents.
  • pour point depressant is added and the mixture is mechanically stirred for about 20-40 minutes till complete dissolution of the depressant.
  • the high performance gearbox lubricant according to the present invention has several advantageous properties over conventional lubricants for similar applications. The most important advantages are listed below.
  • thermo-oxidative stability which is at least 40-50% higher than conventional oils.
  • the candidate oil yields cleaner gear boxes with high degree of deposit control and hence can be classified as "Clean Gear Lubricant”. 5. Extremely good EP/ Anti-wear and pitting protection which are 25-30% higher than the conventional oils under low speed/high torque and non steady-state conditions which are representative of typical city stop-and-go operations. This is demonstrated in FZG test and gearbox component wear tests described below. 6. Exemplary temperature reduction properties in cyclic load conditions, even without any external cooling device, contributing to the overall durability of the oil in severe operating conditions.
  • Tribological evaluations of 4-ball wear scar dia was determined by the respective ASTM method. Load carrying capacity was determined by FZG tester on the indicated gear ratio.
  • a proprietary planetary gear test at 110 °C and with varying loads was employed to determine the overall EP/anti-wear and pitting protection attributes of the candidate oil.
  • the test was conducted in low speed/high torque, non-steady state conditions, characteristic of typical city stop & go conditions experienced by the commercial vehicle gearboxes.
  • the same test was also used to assess the temperature reduction characteristics of the candidate oil over reference lubricants, as the test rig did not employ any cooling devices as in the case of modern commercial vehicles.
  • Condition monitoring of 250 ml sample was conducted. The monitoring was done for oil parameters like viscosity, wear metals, additive metals and TAN build up. Every time, two sets of 250ml samples from each gear box were collected- one for analysis by the applicant and the second one as a control sample to be analysed by Original Equipment Manufacturer (OEM). Equal amounts of fresh oil were topped up after withdrawal of every sample for monitoring.
  • OEM Original Equipment Manufacturer
  • Table 1 indicates that the candidate oil possesses, besides good viscosity index
  • thermo-oxidative stability is one of the targeted parameters for negotiating severe gearbox operating conditions culminating in longer drain potential
  • two most severe thermo-oxidative aging tests were selected during the lab screening stage. While the CEC procedure lays stress on longer drain potential, the Japanese method is severe in terms of catalyzed oxidizing conditions of the test.
  • candidate oil exhibited higher degree of oxidation stability of at least 40-50% higher than the conventional oils, both in terms of controlled TAN increase, minimal viscosity rise and insoluble build up. This is one parameter, which should keep the candidate oil in good stead and impart longer drain capabilities during taxing city stop and go applications. The minimal viscosity rise was demonstrated in the 80,000 kms field tests.
  • Table 3 indicates the temperature reduction properties of the candidate oil in comparison to the high reference oil in the same planetary gear test which is without any extra/external cooling device. A substantial decrease in the running temperature with candidate oil highlights its overall durability potential which facilitates its long drain capabilities.
  • Fig. 3 depicts the viscosity variation of candidate oils in 10 trial buses of city operation over 80,000 KMs. From the graph, it is evident that the candidate oil did not register either too high viscosity rise or too low viscosity decline. During the entire trial duration, the viscosity remained in the SAE 80W-90 grade, same as that of fresh oil. Slight decrease in viscosity in certain buses (2056/57/58) can be attributed to the normal shearing of pour point depressant. Overall viscosity temperature balance of the oil is very good and no excessive oxidative thickening was registered.
  • TAN Total Acid Number
  • Fig.6 shows nominal increase over 80,000 Kms of trial period indicating its superior oxidation stability characteristics.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne une huile lubrifiante pour boîte d'engrenages haute performance pour véhicules commerciaux utilitaires lourds, typiquement des bus avec des opérations de marche-arrêt en ville. Le lubrifiant inventé est une composition d'huile constituée de deux huiles de base et d'un ensemble de combinaison d'additifs. Une huile de base est une huile de base paraffinique appartenant à la catégorie API GP-I ayant une viscosité de 27 à 34 cSt à 100 °C, et la deuxième huile de base est une huile de base API Gp-II hautement paraffinique ayant une viscosité dans la plage de 8 à 12 cSt. Cette composition d'huile a un intervalle entre vidanges d'environ 80 000 km, ce qui est le double de l'intervalle entre vidanges d'huiles conventionnelles pour des applications similaires. Pendant et après utilisation, le lubrifiant conserve sa viscosité dans le grade SAE 80W-90, qui est le même que celui du lubrifiant frais. Le lubrifiant est compatible avec d'autres sources d'huiles destinées à des applications similaires pour éliminer la séparation et la sédimentation d'additifs en cas de mélange. La présente invention concerne en outre un procédé pour produire ce lubrifiant. Le procédé comprend l'agitation mécanique et le chauffage contrôlé tout en mélangeant les additifs avec les huiles de base.
PCT/IN2011/000796 2010-11-19 2011-11-16 Boîte d'engrenages haute performance avec intervalle entre vidanges amélioré pour véhicules commerciaux utilitaires lourds et procédé pour produire celle-ci WO2012066575A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1310/KOL/2010 2010-11-19
IN1310KO2010 2010-11-19

Publications (1)

Publication Number Publication Date
WO2012066575A1 true WO2012066575A1 (fr) 2012-05-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105132107A (zh) * 2015-09-11 2015-12-09 中国石油化工股份有限公司 一种用于纯电动车变速箱的润滑油组合物

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578435B1 (fr) 1992-07-09 1997-10-15 Ethyl Petroleum Additives Limited Modification de la friction d'huiles synthétiques pour engrenages
EP0767236B1 (fr) 1995-10-04 2001-06-27 Ethyl Petroleum Additives Limited Modification de la friction d'huiles synthétiques pour engrenages
EP1669436A1 (fr) 2004-12-08 2006-06-14 Afton Chemical Corporation Compositions d'huile à engrenages résistantes à l'oxydation
EP1739159A2 (fr) 2005-06-30 2007-01-03 Afton Chemical Corporation Méthodes pour améliorer l'efficacité de transmission de puissance et compositions lubrifiantes
DE102007049975A1 (de) * 2006-12-06 2008-06-19 Afton Chemical Corp. Schmiermittelzusammensetzung
US20090062163A1 (en) 2007-08-28 2009-03-05 Chevron U.S.A. Inc. Gear Oil Compositions, Methods of Making and Using Thereof
WO2009158078A1 (fr) * 2008-06-27 2009-12-30 Chemtura Corporation Stabilisant du type phosphite pour bases lubrifiantes et polymères thermoplastiques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578435B1 (fr) 1992-07-09 1997-10-15 Ethyl Petroleum Additives Limited Modification de la friction d'huiles synthétiques pour engrenages
EP0767236B1 (fr) 1995-10-04 2001-06-27 Ethyl Petroleum Additives Limited Modification de la friction d'huiles synthétiques pour engrenages
EP1669436A1 (fr) 2004-12-08 2006-06-14 Afton Chemical Corporation Compositions d'huile à engrenages résistantes à l'oxydation
EP1739159A2 (fr) 2005-06-30 2007-01-03 Afton Chemical Corporation Méthodes pour améliorer l'efficacité de transmission de puissance et compositions lubrifiantes
DE102007049975A1 (de) * 2006-12-06 2008-06-19 Afton Chemical Corp. Schmiermittelzusammensetzung
US20090062163A1 (en) 2007-08-28 2009-03-05 Chevron U.S.A. Inc. Gear Oil Compositions, Methods of Making and Using Thereof
WO2009158078A1 (fr) * 2008-06-27 2009-12-30 Chemtura Corporation Stabilisant du type phosphite pour bases lubrifiantes et polymères thermoplastiques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105132107A (zh) * 2015-09-11 2015-12-09 中国石油化工股份有限公司 一种用于纯电动车变速箱的润滑油组合物
CN105132107B (zh) * 2015-09-11 2019-04-09 中国石油化工股份有限公司 一种用于纯电动车变速箱的润滑油组合物

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