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
  • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
  • C10M171/02—Specified values of viscosity or viscosity index
• • 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
  • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
  • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
  • C10M2219/066—Thiocarbamic type compounds
  • C10M2219/068—Thiocarbamate metal salts
• • 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
  • C10N2030/06—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
  • C10N2030/54—Fuel economy
• • 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
  • C10N2030/74—Noack Volatility
• • 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
  • C10N2040/255—Gasoline engines
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/62—Hybrid vehicles

Definitions

• Plug-in hybrid vehicle engine lubrication and hybrid vehicle comprising a range extender
• the present invention relates to the lubrication of a hybrid vehicle engine of the plug-in hybrid vehicle and hybrid vehicle type comprising a range extender.
• Hybrid vehicles include two engines, a heat engine and an electric motor.
• the internal combustion engine drives the wheels and is backed up by an electric motor.
• a battery provides the electricity necessary for the operation of the electric motor, this battery is, in the case of conventional hybrid vehicles, recharged during the braking and deceleration phases, by a kinetic energy recovery system (SREC) integrated into the vehicle.
• SREC kinetic energy recovery system
• hybrid vehicle technologies There are different hybrid vehicle technologies. Among these hybrid technologies, we can mention in particular:
• micro-hybrid vehicles also called mild hybridization
• these vehicles equipped with the "stop&start” system, recover the energy generated by braking to charge a battery which can temporarily assist the internal combustion engine;
• - full-hybrid vehicles are vehicles with total hybridization.
• the electric motor takes care of starting and locomotion.
• the internal combustion engine takes over, when more power is needed (for example acceleration) the two engines work together. It is thus possible to drive with the internal combustion engine switched off for a few kilometres.
• plug-in hybrid vehicles and hybrid vehicles including a range extender Other complementary technologies have recently been developed: plug-in hybrid vehicles and hybrid vehicles including a range extender.
• Rechargeable hybrid vehicles also called plug-in in English
• the battery can be recharged on the electrical network, these vehicles can thus drive in 100% electric mode over a distance of several tens of kilometers , for example 50 kilometers.
• hybrid vehicles including a range extender also called range extender
• only the electric motor drives the wheels. This electric motor is powered by a battery for a few tens of kilometres.
• the heat engine starts and drives a current generator making it possible to produce the electricity necessary to recharge the battery and maintain the operation of the electric motor.
• the internal combustion engine is used less often and therefore operates at lower temperatures (around or even below 40° C.) in particular than the engines of other types of hybrid vehicles.
• conventional lubricating compositions are more viscous and the additives are not active as in a conventional application at higher temperature.
• Current lubricants have been optimized to save fuel consumption when hot.
• An objective of the present invention is to provide a lubricating composition allowing the lubrication of the engine of a plug-in hybrid vehicle or one comprising a range extender.
• Another objective of the present application is to provide such a lubricating composition allowing use at low operating temperatures, in particular below 40°C.
• a grade lubricating composition comprising at least one base oil, from 0.01 to 10% by weight of at least one friction modifier additive, and from 0.1 to 10% by weight of at least one viscosity index (VI) improving additive, said lubricating composition having a kinematic viscosity measured at 40°C (KV40 of the English Kinematic Viscosity measured at 40°C) less than or equal to 20 mm 2 /s, a kinematic viscosity measured at 100°C (KV100 from English Kinematic Viscosity measured at 100°C) less than or equal to 5 mm 2 /s and a Noack volatility measured at 250°C of between 10 and 85%, preferably between 25 and 85%, more preferably between 60 and 85%, for the lubrication of a rechargeable hybrid vehicle engine or of a vehicle engine hybrid including a range extender.
• the base oil KV40 of the English Kinematic Viscosity measured at 40°C
• the KV100 viscosity of the base oil also called BOV in English for Base Oil Viscosity.
• the KV100 of the base oil mixture (vM) is calculated as follows, for example for a mixture of 2 base oils: with x%H d B i > % base oil 1 x%H d B 2 > % base oil 2 vHdB i > viscosity of mixture 1 vHdB 2> viscosity of mixture 2 v M , viscosity of mixture la same equation can be implemented and extrapolated for a mixture of n base oils.
• the composition according to the invention comprises at least one dispersing agent.
• dispersing agents ensure the maintenance in suspension and the evacuation of the insoluble solid contaminants constituted by the secondary oxidation products which are formed when the lubricating composition is in service.
• They can be chosen from Mannich bases, succinimides and their derivatives, such as derivatives of polyisobutylene succinic anhydride, polyolefin amide alkene amine polyol.
• the composition according to the invention comprises between 0.5 and 4.5% by weight of dispersant, preferably between 1 and 2.5% by weight of dispersant relative to the total weight of the lubricating composition.
• KV40 and KV100 are measured according to ASTM D445.
• the KV40 of the composition of the invention is less than or equal to 20, preferably between 10 and 20 mm 2 /s, preferably between 11 and 15 mm 2 /s.
• the KV100 of the composition of the invention is between 1 and 5 mm 2 /s, preferably between 2.5 and 5 mm 2 /s.
• the Noack volatility at 250° C. is measured according to the CEC L-40-A-93 method.
• the Noack volatility at 250° C. of the lubricating composition of the invention is between 10 and 85%, preferably between 25 and 85%, more preferably between 60 and 85%.
• the lubricating composition comprises from 50 to 95% by weight of base oil, preferably from 70 to 90% by weight, relative to the total weight of the lubricating composition.
• the lubricating composition may also comprise at least one viscosity index (VI) improving additive.
• Viscosity index improvers in particular viscosity index improver polymers, ensure good cold behavior and minimum viscosity at high temperatures.
• polymers improving the viscosity index mention may be made of polymeric esters, homopolymers or copolymers, hydrogenated or non-hydrogenated, of styrene, butadiene and isoprene, homopolymers or copolymers of olefins, such as as ethylene or propylene, polyacrylates and polymethacrylates (PMA), preferably homopolymers, polymethacrylates, or olefin copolymers, such as ethylene or propylene.
• PMA polymethacrylates
• a lubricating composition according to the invention may comprise from 1 to 15% by mass of additive(s) improving the viscosity index, preferably from 5% to 10% by mass, relative to the total weight of the lubricating composition. .
• the lubricating composition according to the invention comprises at least one friction modifier additive.
• Friction modifier additives make it possible to limit friction by forming adsorbed monolayers on the surfaces of metals in contact with them. They can be chosen from compounds providing metallic elements and ash-free compounds. Among the compounds providing metallic elements, mention may be made of complexes of transition metals such as Mo, Sb. Sn, Fe, Cu, Zn whose ligands can be hydrocarbon compounds comprising oxygen, nitrogen, sulfur or phosphorus atoms.
• the ash-free friction modifier additives are generally of organic origin and can be chosen from esters of fatty acids and polyols, distinct from the monoester required according to the invention, alkoxylated amines, alkoxylated fatty amines, fatty epoxides , borate fatty epoxides, fatty amines or fatty acid glycerol esters.
• the fatty compounds comprise at least one hydrocarbon group comprising from 10 to 24 carbon atoms.
• the molybdenum-based compounds can be chosen from molybdenum dithiocarbamates (Mo-DTC), molybdenum dithiophosphates (Mo-DTP), and mixtures thereof.
• the lubricating composition according to the invention can comprise from 0.01 to 10% by mass or from 0.01 to 5% by mass, preferably from 0.01 to 2% by mass, preferably from 0.1 to 1.5% by mass or from 0.1 to 2% by mass relative to the total mass of the lubricating composition, of friction modifier additive.
• Molybdenum (Mo) in the lubricating composition of the invention is provided by an organomolybdenum compound, in particular a compound chosen from a molybdenum dithiocarbamate derivative (MoDTC), a molybdenum dithiophosphate derivative (MoDTP) or a sulfur-free molybdenum complex , preferably a molybdenum dithiocarbamate derivative (MoDTC).
• MoDTC molybdenum dithiocarbamate derivative
• MoDTP molybdenum dithiophosphate derivative
• sulfur-free molybdenum complex preferably a molybdenum dithiocarbamate derivative (MoDTC).
• Molybdenum dithiocarbamate compounds are complexes formed from a metal nucleus bonded to one or more ligands independently chosen from alkyl dithiocarbamate groups.
• the MoDTC compound of the compositions used according to the invention may comprise from 0.01 to 5%, preferably from 0.1 to 1.5% by mass of molybdenum, relative to the total mass of the MoDTC compound.
• the composition according to the invention comprises a molybdenum-based friction modifier additive and preferably comprises (in active content) from 1 to 1000 ppm of Mo, preferably from 400 to 600 ppm relative to the weight of the lubricating composition .
• rechargeable hybrid vehicle also called plug-in
• plug-in is understood to mean a vehicle comprising a heat engine and an electric motor
• the battery can be recharged on the electrical network, this vehicle can thus drive in 100% electric mode over a distance of several tens of kilometres, for example for 50 kilometres.
• hybrid vehicle comprising a range extender
• a hybrid vehicle in which only the electric motor drives the wheels.
• This electric motor is powered by a battery for a few tens of kilometres.
• the heat engine starts and drives a current generator to produce the electricity needed to recharge the battery and maintain the operation of the electric motor.
• the use of the lubricating composition according to the invention makes it possible to obtain a gain in consumption for rechargeable hybrid vehicles or vehicles comprising a range extender that are much greater than for other hybrid motorization systems.
• the use of the composition according to the invention also allows a greater FE (Fuel Economy) gain demonstrated on vehicles of the Range Extender and Plug-In Hybrid type compared with a conventional lubricant.
• the base oils used in the lubricating compositions according to the invention can be oils of mineral or synthetic origin, optionally regenerated, belonging to groups I to V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification) (Table A) or mixtures thereof.
• the mineral base oils according to the invention include all types of bases obtained by atmospheric and vacuum distillation of crude oil, followed by refining operations such as solvent extraction, deasphalting, solvent dewaxing, hydrotreating, hydrocracking, hydroisomerization and hydrofinishing. Mixtures of synthetic and mineral oils, possibly regenerated, can also be used.
• lubricating bases there is generally no limitation as to the use of different lubricating bases to produce the lubricating compositions according to the invention, except that they must have properties, in particular of viscosity, viscosity index, sulfur content , resistance to oxidation, suitable for use in engines or vehicle transmissions.
• the base oils of the lubricating compositions according to the invention can also be chosen from synthetic oils, such as certain esters of carboxylic acids and alcohols, and from polyalphaolefins.
• the polyalphaolefins used as base oils are for example obtained from monomers comprising from 4 to 32 carbon atoms, for example from octene or decene, and whose viscosity at 100° C. is between 1.5 and 15 mm 2 . s 1 according to ASTM D445. Their average molecular mass is generally between 250 and 3,000 according to the ASTM D5296 standard.
• the lubricating composition according to the invention may comprise at least 50% by mass of base oils relative to the total mass of the composition. More advantageously, the lubricating composition according to the invention comprises at least 60% by mass, or even at least 70% by mass, of base oils relative to the total mass of the composition. More particularly advantageously, the lubricating composition according to the invention comprises from 75% to 95%% by mass of base oils relative to the total mass of the composition.
• the invention also provides a lubricating composition for vehicle engines comprising at least one lubricating composition according to the invention, at least one base oil and at least one additive.
• the preferred additives for the lubricating composition according to the invention are chosen from detergent additives, anti-wear additives, extreme pressure additives, pour point improvers, anti-foaming agents, thickeners and mixtures thereof.
• the lubricating composition according to the invention comprises at least one anti-wear additive, at least one extreme pressure additive or mixtures thereof.
• Anti-wear additives and extreme pressure additives protect friction surfaces by forming a protective film adsorbed on these surfaces.
• the anti-wear additives are chosen from phosphosulfur additives such as metal alkylthiophosphates, in particular zinc alkylthiophosphates, and more specifically zinc dialkyldithiophosphates or ZnDTP.
• phosphosulfur additives such as metal alkylthiophosphates, in particular zinc alkylthiophosphates, and more specifically zinc dialkyldithiophosphates or ZnDTP.
• the preferred compounds are of formula Zn((SP(S)(OR)(OR ' ))2, in which R and R ' , which are identical or different, independently represent an alkyl group, preferably an alkyl group comprising from 1 to 18 atoms of carbon.
• Amine phosphates are also anti-wear additives which can be used in the lubricating composition according to the invention.
• the phosphorus brought by these additives can act as a poison for the catalytic systems of automobiles because these additives are ash generators.
• These effects can be minimized by partially replacing the amine phosphates with additives that do not provide phosphorus, such as, for example, polysulphides, in particular sulphur-containing olefins.
• the lubricating composition according to the invention may comprise from 0.01 to 6% by mass, preferentially from 0.05 to 4% by mass, more preferentially from 0.1 to 2% by mass relative to the mass total of lubricating composition, anti-wear additives and extreme pressure additives.
• the lubricating composition according to the invention may comprise at least one antioxidant additive.
• the antioxidant additive generally makes it possible to delay the degradation of the lubricating composition in service. This degradation can in particular result in the formation of deposits, in the presence of sludge or in an increase in the viscosity of the lubricating composition.
• Antioxidant additives act in particular as free radical inhibitors or destroyers of hydroperoxides.
• antioxidant additives commonly employed, mention may be made of antioxidant additives of the phenolic type, antioxidant additives of the amine type, phosphosulfur antioxidant additives. Some of these antioxidant additives, for example phosphosulfur antioxidant additives, can be ash generators.
• the phenolic antioxidant additives may be ash-free or may be in the form of neutral or basic metal salts.
• the antioxidant additives may in particular be chosen from sterically hindered phenols, sterically hindered phenol esters and sterically hindered phenols comprising a thioether bridge, diphenylamines, diphenylamines substituted with at least one C1-C12 alkyl group, N,N '-dialkyl-aryl-diamines and mixtures thereof.
• the sterically hindered phenols are chosen from compounds comprising a phenol group of which at least one carbon vicinal to the carbon bearing the alcohol function is substituted by at least one Ci-C 10 alkyl group, preferably a group C 1 -C 6 alkyl, preferably a C 4 alkyl group, preferably by the ter-butyl group.
• Amino compounds are another class of antioxidant additives that can be used, possibly in combination with phenolic antioxidant additives.
• Examples of amino compounds are aromatic amines, for example the aromatic amines of formula NR a R b R c in which R a represents an aliphatic group or an optionally substituted aromatic group, R b represents an optionally substituted aromatic group, R c represents a hydrogen atom, a alkyl group, an aryl group or a group of formula R d S(0) z R e in which R d represents an alkylene group or an alkenylene group, R e represents an alkyl group, an alkenyl group or an aryl group and z represents 0, 1 or 2.
• Sulfurized alkyl phenols or their alkali and alkaline earth metal salts can also be used as antioxidant additives.
• antioxidant additives are that of copper compounds, for example copper thio- or dithio-phosphates, salts of copper and carboxylic acids, dithiocarbamates, sulphonates, phenates, copper acetylacetonates. Copper I and II salts, succinic acid or anhydride salts can also be used.
• copper compounds for example copper thio- or dithio-phosphates, salts of copper and carboxylic acids, dithiocarbamates, sulphonates, phenates, copper acetylacetonates.
• Copper I and II salts, succinic acid or anhydride salts can also be used.
• the lubricating composition according to the invention may contain all types of antioxidant additives known to those skilled in the art.
• the lubricating composition comprises at least one ash-free antioxidant additive.
• the lubricating composition according to the invention comprises from 0.1 to 2% by weight, based on the total mass of the composition, of at least one antioxidant additive.
• the lubricating composition according to the invention may also comprise at least one detergent additive.
• Detergent additives generally reduce the formation of deposits on the surface of metal parts by dissolving secondary products of oxidation and combustion.
• detergent additives which can be used in the lubricating composition according to the invention are generally known to those skilled in the art.
• Detergent additives can be anionic compounds comprising a long lipophilic hydrocarbon chain and a hydrophilic head.
• the associated cation can be a metal cation of an alkali or alkaline earth metal.
• the detergent additives are preferably chosen from alkali metal or alkaline-earth metal salts of carboxylic acids, sulfonates, salicylates, naphthenates, as well as phenate salts.
• the alkali and alkaline-earth metals are preferably calcium, magnesium, sodium or barium.
• These metallic salts generally comprise the metal in a stoichiometric quantity or else in excess, therefore in a quantity greater than the stoichiometric quantity.
• These are then overbased detergent additives; the excess metal providing the overbased character to the additive
• the detergent is then generally in the form of an oil-insoluble metal salt, for example a carbonate, a hydroxide, an oxalate, an acetate, a glutamate, preferentially a carbonate.
• the lubricating composition according to the invention may comprise from 0.5 to 8% or from 2 to 4% by weight of detergent additive relative to the total mass of the lubricating composition.
• the lubricating composition according to the invention may also comprise at least one pour point depressant additive.
• the pour point depressant additives By slowing down the formation of paraffin crystals, the pour point depressant additives generally improve the cold behavior of the lubricating composition according to the invention.
• pour point depressant additives mention may be made of polyalkyl methacrylates, polyacrylates, polyarylamides, polyalkylphenols, polyalkylnaphthalenes, alkylated polystyrenes.
• the present invention relates to a method for lubricating a plug-in hybrid vehicle engine or a hybrid vehicle engine comprising a range extender, comprising bringing at least one mechanical part of the engine into contact with a lubricating composition of grade, according to classification SAEJ300, OW-8, comprising at least one base oil, at least one friction modifier additive, from 0.1 to 10% by weight of at least one viscosity index improver polymer, the lubricating composition having a KV40 of less than 20 mm 2 /s, a KV100 of less than 5 mm 2 /s and a Noack volatility at 250° C. is between 10 and 85%, preferably between 25 and 85%, more preferably between 60 and 85%.
• the lubricating composition is preferably as defined above.
• the present invention also relates to a method for reducing the fuel consumption of a plug-in hybrid vehicle or of a hybrid vehicle comprising a range extender comprising bringing at least one mechanical part of the engine into contact with a lubricating composition of grade, according to the SAEJ300, OW-8 classification, comprising at least one base oil, at least one friction modifier additive, from 0.1 to 10% by weight of at least one viscosity index improver polymer, the lubricating composition having a KV40 less than or equal to 20 mm 2 /s, a KV100 of less than 5 mm 2 /s and a Noack volatility at 250° C. of between 10 and 85%, preferably between 25 and 85%, more preferably between 60 and 85%.
• composition is preferably as described above.
• present invention will now be described using the examples which follow, which do not include any limiting character.
• Figure 1 shows the evolution of engine speed (right axis in rpm) and lubricant temperature (left axis in °C) during a WLTC test.
• Example 1 Compositions according to the invention and comparative compositions
• CC comparative composition
• CL composition according to the invention
• Example 2 Gain in WLTC cvcle consumption
• the compositions of example 1 underwent a simulation for hybrid application of the WLTC (or WLTP) test (worldwide harmonized test procedure for light vehicles) in order to determine the gain in fuel consumption.
• friction tests of the various lubricant compositions described in Example 1 were carried out on a test bench comprising a Nissan X-Trail MR20 driven motor, the power of which is 108 kW at 5600 rpm, driven by an electric generator making it possible to impose a rotation speed of between 550 and 2800 rpm while a torque sensor makes it possible to measure the friction torque generated by the movement of the parts in engine.
• the friction torque induced by the lubricating composition to be tested is compared, for each engine speed and for each average torque at each temperature, with that induced by the reference lubricating composition (SAE 0W16) which was evaluated before and after each of the lubricating compositions to be tested.
• SAE 0W16 reference lubricating composition
• a detergent additive for lubricating oil comprising one rinse, followed by two rinses with a reference lubricant composition of grade OW-12 comprising 81.7% by mass of base oil, 17.8% by mass of Common Additives (4.4% Viscosity Index Improver, 0.5% Oxidizer, 0.20% Pour Point Depressant and 12.7% Additive Pack) , and 0.05% by mass of molybdenum dithiocarbamate (MoDTC), relative to the total mass of the base oil;
• a detergent additive for lubricating oil comprising one rinse, followed by two rinses with a reference lubricant composition of grade OW-12 comprising 81.7% by mass of base oil, 17.8% by mass of Common Additives (4.4% Viscosity Index Improver, 0.5% Oxidizer, 0.20% Pour Point Depressant and 12.7% Additive Pack) , and 0.05% by mass of molybdenum dithiocarbamate (MoDTC), relative to the total mass of the base oil;
• powers of 1 or 2 kW are representative of electric assistance for light hybridization types (Micro-Hybrid and Mild-Hybrid respectively).
• a power of 5 kW is representative of the electric assistance of a rechargeable hybrid vehicle (Full-Hybdrid).
• compositions according to the invention allow a significant gain in consumption for rechargeable hybrid (plug-in hybrid) and hybrid systems comprising a range extender. On the contrary, these same compositions according to the invention do not allow a substantial gain over the other types of hybrid motorization. These results show that the compositions according to the invention are specifically effective for rechargeable hybrid engines and for hybrid engines comprising a range extender.
• the average lubricant temperature has been extrapolated is greater than 70°C for a non-hybrid vehicle engine, greater than 60°C for a micro-hybrid vehicle, greater than 55°C for a mild-hybrid vehicle, greater than 50°C for a full-hybrid vehicle, and is less than 40°C for hybrid vehicles including a range extender and rechargeable hybrid vehicle.

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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)

Applications Claiming Priority (2)

Publications (1)

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• 2021
  • 2021-03-30 FR FR2103252A patent/FR3121447B1/fr active Active
• 2022
  • 2022-03-30 CN CN202280025369.0A patent/CN117120582A/zh active Pending
  • 2022-03-30 EP EP22719291.1A patent/EP4314214A1/de active Pending
  • 2022-03-30 JP JP2023560265A patent/JP2024511829A/ja active Pending
  • 2022-03-30 WO PCT/EP2022/058431 patent/WO2022207715A1/fr active Application Filing
  • 2022-03-30 KR KR1020237037079A patent/KR20230161508A/ko unknown

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