Cleaning composition for heat engine

Abstract

The invention relates to a particular liquid composition and a method for cleaning a gasoline or diesel internal combustion engine where such a liquid composition is added to the engine oil reservoir and / or to the fuel tank.

Description

technical field

[0001] This disclosure relates to the field of cleaning compositions intended for use in internal combustion engines (primarily diesel and gasoline engines). The present invention relates to such compositions, a method for cleaning an internal combustion engine with these compositions, and fuels and engine oils comprising such compositions. Previous technique

[0002] It is known that internal combustion diesel and petrol engines inevitably become clogged over time because combustion in diesel and petrol engines is never complete.

[0003] The accumulation of combustion residue deposits (primarily composed of soot, tar, and ash) inside diesel and gasoline engines increases friction between moving mechanical parts and degrades combustion quality and engine sealing (gases generated by combustion leak into the engine oil pan). Consequently, these combustion residues contaminate the engine oil and reduce engine lubrication. The accumulation of combustion residue deposits inside diesel and gasoline engines impairs engine efficiency (performance), increases fuel consumption and pollution, and accelerates engine wear.

[0004] Indeed, the accumulation of combustion residue deposits inside diesel and gasoline engines increases friction between moving mechanical parts, disrupting their movement within the engine, hindering starting, and degrading its responsiveness, acceleration, and power. Furthermore, and more generally, diesel and gasoline engines are very sensitive to fuel quality and the quantity of fuel injected. The quality and quantity of fuel injected have a direct impact on combustion quality and therefore on the amount of unburned fuel generated. An increase in the amount of unburned fuel generated by combustion will place excessive strain on the emissions control systems and thus accelerate the deterioration of their proper functioning in diesel and gasoline engines.That is why it is crucial that the components of internal combustion engines, both diesel and petrol, function correctly, and for this it is important to strive for optimal cleanliness.

[0005] Furthermore, combustion residues spread throughout the engine, particularly via the lubrication system, which accelerates the deterioration of the engine oil quality and therefore the quality of engine lubrication.

[0006] It is known to add one or more additives to fuel and / or engine oil to improve their quality or engine performance. These additives may be contained within the fuel and / or engine oil itself, or added to it via an auxiliary device.

[0007] However, the majority of these additives only act preventively and / or their low concentration of active compounds does not allow for effective and complete cleaning of the engine, which is essential for optimal engine operation.

[0008] However, regardless of fuel quality, fouling of diesel and petrol internal combustion engines remains inevitable, which inexorably leads to a general degradation of performance and in particular an increase in fuel consumption and pollution.

[0009] The present invention aims to optimize and / or maintain the optimal performance of diesel and gasoline internal combustion engines for longer periods, thereby slowing engine wear and reducing fuel consumption and pollution. To this end, the inventor has developed a method for preventively or curatively treating engine fouling, with a positive impact on the environment. This method allows diesel and gasoline engines to maintain their performance for longer periods while limiting pollutant emissions and fuel consumption, all in a simple and effective manner that does not damage engine parts or seals, even in older engines or those with very high mileage. Summary

[0010] According to a first aspect, the invention relates to a liquid composition comprising at least: between 45 and 70% of component (A) which is a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes and cyclic hydrocarbons whose number of carbons is mostly in the C10-C13 range and whose flash point is between 61 and 80°C measured according to the ASTM D93 standard, between 1 and 10% of component (B) which is a mixture of hydrocarbon fractions (B1, B2) whose flash point is between 1 and 20°C measured according to ASTM D56, the hydrocarbon fraction (B1) being a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is mostly in the C9-C10 range and presents between 1 and 20% by weight relative to the weight of component (B) and the hydrocarbon fraction (B2) being a fraction of hydrocarbons selected from among the n-alkanes, the isoalkanes,and cyclic hydrocarbons whose carbon number is predominantly in the C7-C9 range and which constitute between 80 and 99% by weight relative to the weight of component (B); between 1 and 20% of component (C) which is an oil containing less than 3% by weight of dimethyl sulfoxide in accordance with standard IP346 and between 1 and 8% by weight relative to the weight of component (C) of at least one additive selected from aliphatic and aromatic and / or phosphate amines or a mixture thereof; , the percentages of components (A), (B) and (C) being expressed by weight relative to the total weight of the liquid composition.

[0011] According to other aspects, the invention relates to a method for cleaning a diesel or gasoline internal combustion engine using this composition, a fuel or engine oil comprising it, as well as its use. Brief description of the drawings

[0012] Other features, details, and advantages will become apparent upon reading the detailed description below and analyzing the attached drawings, on which: Fig. 1

[0013] [ Fig. 1A and 1B ] show two photos of a cylinder head from a front-mounted diesel truck engine ( Fig. 1A ) and then ( Fig. 1B ) have undergone a cleaning process according to the invention. Fig. 2

[0014] [ Fig. 2A et2B] show two photos of a piston head from a front-engine gasoline car ( Fig. 2A ) and then ( Fig. 2B ) having undergone a cleaning process according to the invention, taken with an endoscopic camera in a combustion chamber. Fig. 3

[0015] [ Fig. 3A and 3B ] show photos of a cylinder block and piston head from a front-engine petrol car ( Fig. 3A ) (mileage 340,474 km) and after ( Fig. 3B) (mileage 342,089 km) having undergone a cleaning process according to the invention. Fig. 4

[0016] [ Fig. 4A and 4H ] show photos of a piston head, cylinder head, valve and turbocharger from a diesel engine of a front generator set ( Fig. 4A, 4C, 4E, 4G ( , respectively) and after ( Fig. 4B, 4D, 4F, 4H , respectively) have undergone a cleaning process according to the invention. Fig. 5

[0017] [ Fig. 5 ] shows a diagram illustrating the friction coefficients of an engine oil with or without the composition according to the invention. Detailed description of the invention Liquid composition

[0018] A liquid composition is described comprising at least: a component (A) which is a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is predominantly in the C10-C13 range and whose flash point is between 61 and 80°C measured according to the ASTMD93 standard, a component (B) which is a mixture of hydrocarbon fractions (B1, B2) whose flash point is between 1 and 20°C measured according to the ASTMD56 standard, - a component (C) which is an oil containing less than 3% by weight of dimethyl sulfoxide in accordance with the IP346 standard and between 1 and 8% by weight relative to the weight of component (C) of at least one additive selected from aliphatic and aromatic and / or phosphate amines or a mixture thereof;and possibly a component selected from: - a component (D) which is an oil containing at least one additive, less than 3% by weight relative to the weight of component (D) of dimethyl sulfoxide extract in accordance with standard IP346 and at least one base oil having a viscosity of less than 20.5 cSt, measured at 40°C according to ASTMD445; a component (E) which is a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is predominantly in the C9-C11 range and whose flash point is between 41 and 60°C measured according to ASTMD56; a component (F) which is acetone; and a component (G) which is a dye. Component (A)

[0019] Component (A) is a dearomatized fraction of hydrocarbons, these being selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is predominantly in the C10-C13 range and whose flash point is between 61 and 80°C, preferably between 61 and 70°C, and preferably still between 61 and 66°C. The latter is measured according to the ASTM D93 standard.

[0020] For the purposes of this invention, "dearomatized" means a total aromatic compound content of less than 2% by weight, preferably less than 0.5% by weight, preferably less than 0.1% by weight, or even less than 0.05% by weight relative to the total weight of the respective component.

[0021] Component (A) may have CAS registration number 64742-48-9. Component (A) may have REACH registration number 01-2119457273-39-(0011 to 0015). Component (A) may have European Community registration number 918-481-9.

[0022] The boiling point may be approximately between 160°C and 245°C, preferably between 175°C and 235°C, measured according to ASTM D86. In particular, the initial boiling point may be between 160°C and 200°C, preferably between 175°C and 190°C, measured according to ASTM D86. The dry point may be between 190°C and 245°C, preferably between 205°C and 220°C, measured according to ASTM D86.

[0023] The component (A) has a density measured at 15°C which can be between 0.740 and 0.850 g / ml, preferably between 0.770 and 0.830 g / ml, preferably between 0.780 and 0.810 g / ml measured according to ISO 12185.

[0024] The kinematic viscosity may be less than 20.5 mm² / s (or cSt) measured at 40°C according to ASTM D445. The kinematic viscosity may be between 0.25 and 2.95 mm² / s (or cSt), preferably between 1.50 and 2.10 mm² / s (or cSt) measured at 25°C according to ASTM D445. Component (A) may be a colorless liquid. Component (B)

[0025] Component (B) is a mixture of two hydrocarbon fractions B1 and B2. Component (B) contains between 1 and 20%, preferably between 10 and 20%, and more preferably between 12 and 20%, of hydrocarbon fraction (B1), and between 80 and 99%, preferably between 80 and 90%, and more preferably between 80 and 88%, of hydrocarbon fraction (B2), the percentages being by weight relative to the total weight of component (B).

[0026] The flash point of component (B) is between 1 and 20°C, measured according to ASTM D56.

[0027] Component (B) may have a boiling point between 95°C and 180°C, measured according to ASTM D86. In particular, the initial boiling point may be between 95°C and 120°C, preferably between 95°C and 115°C, measured according to ASTM D86. The dry point may be between 130°C and 180°C, preferably between 155°C and 170°C, measured according to ASTM D86.

[0028] The component (B) may have a density measured at 15°C of between 0.720 and 0.780 kg / dm3, preferably between 0.730 and 0.760 kg / dm3, measured according to ISO 12185.

[0029] The kinematic viscosity of (B) can be between 0.25 and 1.80 mm2 / s (or cSt), preferably between 0.70 and 1.00 mm2 / s (or cSt), measured at 25°C according to ASTMD445. Component (B) may be a transparent liquid.

[0030] The hydrocarbon fraction (B1), which enters into component (B), is a dearomatized fraction of hydrocarbons chosen from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is mostly in the C9-C10 range.

[0031] The hydrocarbon fraction (B1) may have a European Community registration number CE 927-241-2 and a REACH registration number 01-2119471843-32 (accessed on 26 / 10 / 2023 https: / / echa.europa.eu / substance-information / - / substanceinfo / 100.059.21 0).

[0032] The hydrocarbon fraction (B2), which enters into component (B), is a fraction of hydrocarbons chosen from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is mostly in the C7-C9 range.

[0033] The hydrocarbon fraction (B2) may have a European Community registration number CE 920-750-0 and a REACH registration number 01-2119473851-33 (accessed on 26 / 10 / 2023 https: / / echa.europa.eu / substance-information / - / substanceinfo / 100.059.211). Component (C)

[0034] Component (C) is an oil comprising less than 3% dimethyl sulfoxide in accordance with IP346 and between 1 and 8%, preferably between 1 and 6%, of at least one additive selected from aliphatic and aromatic and / or phosphate amines or a mixture thereof, the percentages being expressed by weight relative to the total weight of component (C).

[0035] Its flash point measured according to ISO2592 is between 220°C and 280°C, preferably between 225 and 250°C.

[0036] The component (C) can be a transmission oil, a mineral oil, a highly refined mineral oil, a base oil, a synthetic base oil. Dimethyl sulfoxide is known by the abbreviation DMSO.

[0037] The component (C) comprises between 1 and 8%, preferably between 1 and 6%, preferably again between 1.5 and 6% of additive, the percentages being expressed by weight relative to the total weight of the component (C).

[0038] The additive is chosen from aliphatic and aromatic and / or phosphate amines or a mixture thereof.

[0039] Examples of aliphatic and aromatic amines include bis(alkylphenyl)amines, the alkyl group of which contains between 4 and 14 carbon atoms, in particular bis(nonylphenyl)amine, which may have a CAS registration number 36878-20-3, an EC registration number 253-249-4 and a REACH registration number 01-2119488911-28.

[0040] An example of an amine phosphate is an ester of phosphoric acid and alkyl amino salts. This amine phosphate may be a reaction product of 4-methyl-2-pentanol and diphosphorus pentasulfide, propoxylated, esterified with diphosphorus pentaoxide and salted with amines, C12-14-tert-alkyl, which may have an EC registration number 931-384-6 and a REACH registration number 01-2119493620-38.

[0041] The component (C) may comprise between 0.5 and 5%, preferably between 1 and 3%, of aliphatic and aromatic amines, the percentages by weight being expressed in relation to the weight of the component (C).

[0042] Component (C) may comprise between 0.5 and 5%, preferably between 1 and 2.4%, of amine phosphate as an additive, the percentages being expressed by weight relative to the total weight of component (C).

[0043] The component (C) may have a density measured at 15°C of between 0.820 and 0.880 kg / dm3, preferably between 0.830 and 0.870 kg / dm3, measured according to ISO 12185.

[0044] The component (C) may have an SAE viscosity grade of 75W-80 measured according to the SAE J 306 method.

[0045] The kinematic viscosity of the component (C) can be between 45 and 65 mm² / s (or cSt), preferably between 50 and 60 mm² / s (or cSt), measured at 40°C according to ISO3104.

[0046] The kinematic viscosity of component (C) can be between 4 and 15 mm² / s (or cSt), preferably between 7 and 11 mm² / s (or cSt), measured at 100°C according to ISO3104.

[0047] The dynamic viscosity of component (C) can be between 20,000 and 40,000 mPa.s, preferably between 25,000 and 35,000 mPa.s, measured at -40°C according to ASTM D 2983.

[0048] The viscosity index of the component (C) can be between 120 and 210, preferably between 140 and 175, measured according to ISO 2909. Component (C) may be an amber-colored liquid at room temperature. Component (D)

[0049] Component (D) is an oil which comprises at least one additive, less than 3% by weight of dimethyl sulfoxide extract in accordance with IP346 relative to the weight of component (D) and at least one base oil having a viscosity of less than 20.5 cSt, measured at 40°C according to ASTM D445, the base oil being at least one compound selected from the list: a light naphthenic distillate of hydrotreated petroleum having CAS registration number 64742-53-6, a heavy paraffinic distillate of hydrotreated petroleum having CAS registration number 64742-54-7, a light paraffinic distillate of hydrotreated petroleum having CAS registration number 64742-55-8, a petroleum distillate, light paraffin solvent, wax-free having CAS registration number 64742-56-9, a petroleum distillate, heavy paraffin solvent, wax-free having CAS registration number 64742-65-0, hydrogenated polydecene-1 having CAS registration number 68037-01-4, a mixture of petroleum lubricating oils having 15-30 carbon neutral atoms based on hydrotreated oil having CAS registration number 72623-86-0, a blend of oils having 20-50 carbon-neutral atoms based on hydrotreated oil having CAS registration number 72623-87-1,a white mineral petroleum oil having CAS registration number 8042-47-5, a mixture of branched, cyclic, and linear hydrocarbon oils having 18-50 carbon atoms having CAS registration number 848301-69-9, 1-decene, tetramer blended with 1-decene trimer, hydrogenated having CAS registration number 68649-12-7, 1-dodecene, polymer blended with 1-decene, hydrogenated having CAS registration number 151006-60-9, 1-decene, polymer blended with 1-octene and 1-dodecene, hydrogenated having CAS registration number 163149-28-8, a heavy paraffinic petroleum distillate having CAS registration number 64741-88-4, or a mixture thereof.

[0050] Component (D) may be a mineral oil, a highly refined mineral oil, a base oil, or a synthetic base oil.

[0051] Component (D) may comprise between 0 and 90% by weight of a base oil relative to the weight of component (D).

[0052] Light naphthenic distillate of hydrotreated petroleum may have REACH number 01-2119480375-34 and may play the role of friction modifier.

[0053] Heavy paraffin distillate of hydrotreated petroleum may have REACH number 01-2119484627-25.

[0054] Light hydrotreated petroleum paraffin distillate may have REACH number 01-2119487077-29.

[0055] Petroleum distillate, light paraffin solvent, wax-free may have REACH number 01-2119480132-48.

[0056] Heavy paraffin-free petroleum distillate, wax-free, may have REACH number 01-2119471299-27. Distillates can be formed by the removal of normal paraffins from a petroleum fraction by solvent crystallization and consist mainly of hydrocarbons with carbon numbers between C20 and C50. The finished oil may generally contain branched hydrocarbons remaining after the removal of normal paraffins.

[0057] Hydrogenated polydecene-1 may have the REACH number 01-2119486452-34. It may have the general formula C10H20.

[0058] The blend of petroleum-based lubricating oils, containing 15-30 carbon atoms, based on hydrotreated oil, may have REACH number 01-2119474878-16. It may be composed of liquid paraffins, for example, a blend of hydrotreated hydrocarbons containing 15 to 30 carbon atoms, preferably 18 to 23 carbon atoms. The oil's viscosity can be quite low: around 8.9 W / cm³ (at 40°C) and 2.5 W / cm³ (at 100°C).

[0059] The oil blend may contain 20-50 neutral carbon atoms and is based on hydrotreated oil with REACH number 01-2119474889-13. The hydrotreated oil blend may be primarily a complex combination of hydrocarbons containing 20 to 50 carbon atoms and has a viscosity of approximately 32 cSt at 40°C. "Neutral" means a carbon atom that carries no formal positive or negative charges.

[0060] White petroleum mineral oil may have REACH number 01-2119487078-27. By "white mineral oil" is meant an oil having a clear, transparent or slightly tinted appearance, rather than the dark color associated with untreated mineral oils.

[0061] The mixture of branched, cyclic and linear hydrocarbon oils having 18-50 carbon atoms may have the REACH number 01-0000020163-82 or 01-0000020164-80.

[0062] 1-decene, tetramer mixed with 1-decene trimer, - hydrogenated may have REACH number 01-2119527646-33.

[0063] 1-Dodecene, a polymer mixed with hydrogenated 1-decene, may have REACH number 01-2119523580-47.

[0064] 1-Decene, a polymer mixed with 1-octene and 1-dodecene, hydrogenated, may have REACH number 01-2119543695-30.

[0065] Petroleum distillate, heavy paraffin solvent may have REACH number 01-2119488706-23.

[0066] Zinc dialkyl dithiophosphate can be, for example, zinc bis[O-(1,3-dimethylbutyl) O-isopropyl dithiophosphate] or zinc, O,O-mixed (1-methylethyl), (1,3-dimethylbutyl) phosphorodithioate. Zinc dialkyl dithiophosphate may have a European Community registration number CE 283-392-8. Zinc dialkyl dithiophosphate helps control oxidation and corrosion of motors or metal parts in contact and in motion.

[0067] Component (D) may further comprise between 0.5 and 6.5% by weight of a metal sulfide phenate relative to the weight of component (D), the metal element being selected from calcium, magnesium or zinc.

[0068] Metal phenates and sulfided metal phenates are among the detergents used in lubricating oils, primarily for internal combustion engines, and their function is to neutralize acidic substances, sludge, etc., generated within the engine. Thus, metal phenates, generally alkaline earth phenates (magnesium, calcium, strontium, barium), protect engine parts from excessive corrosion caused by these acidic substances and prevent excessive wear caused by sludge. The high concentration of these phenates helps combat the acid generated during fuel combustion, and their sulfation primarily improves the oil's thermal stability and solubility.

[0069] The metal phenate sulfide can be a branched calcium alkyl phenate sulfide in which the alkyl has between 1 and 25 carbon atoms, preferably between 3 and 15 carbon atoms, for example 10 carbon atoms.

[0070] Sulfated metal phenate may have a REACH registration number 01-2119524004-56 and a European Community registration number CE 701-251-5.

[0071] Component (D) includes at least one additive, which may be present at a concentration of 0.5 to 10% by weight relative to the weight of component (D). The additive improves the anti-wear properties of the oil.

[0072] For example, component (D) comprises between 0.5 and 3.5% by weight relative to the weight of component (D) of zinc dialkyl dithiophosphate as an additive, the alkyl chain of which may comprise between 3 and 15 carbon atoms.

[0073] Component (D) may comprise between 0.5 and 3.5% by weight of zinc dialkyl dithiophosphate relative to the weight of component (D) and between 0.5 and 6.5% by weight of a metal sulfide phenate relative to the weight of component (D).

[0074] The component (D) has a flash point measured according to ASTM D92 that can be between 200°C and 250°C.

[0075] The component (D) may have a density measured at 15°C of between 0.850 and 0.910 kg / dm3, preferably between 0.860 and 0.890 kg / dm3, measured according to ASTMD4052.

[0076] The component (D) may have an SAE viscosity grade of 15W-40 measured according to the SAE J 300 method.

[0077] The component (D) may have a kinematic viscosity between 80 and 120 mm 2< / s (or cSt), preferably between 100 and 110 mm 2< / s (or cSt), measured at 40°C according to ASTMD445.

[0078] The component (D) may have a kinematic viscosity of between 8 and 20 mm 2< / s (or cSt), preferably between 12 and 16 mm 2< / s (or cSt), measured at 100°C according to ASTMD445.

[0079] The viscosity index of the component (D) may be between 90 and 160, preferably between 125 and 145, preferably still between 128 and 136, measured according to ISO 2909. Component (E)

[0080] The component (E) is a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is mostly in the C9-C1 range and whose flash point is between 41 and 60°C measured according to ASTMD56.

[0081] The component (E) may have a CAS registration number 64742-48-9 or 64742-47-8. Its REACH registration number may be 01-2119463258-33 and its European Community CE registration number may be 919-857-5.

[0082] The boiling point may be approximately between 150°C and 225°C, preferably between 150°C and 205°C, measured according to ASTM D86. In particular, the initial boiling point may be between 150°C and 180°C, measured according to ASTM D86. The dry point may be between 180°C and 205°C, measured according to ASTM D86.

[0083] The component (E) may have a density measured at 15°C of between 0.750 and 0.810 g / ml, preferably between 0.760 and 0.800 g / ml, according to ASTMD4052.

[0084] The kinematic viscosity can be between 0.25 and 1.95 mm² / s (or cSt), preferably between 0.90 and 1.40 mm² / s (or cSt), measured at 25°C according to ASTM D445. The component (E) may be colorless and liquid. Acetone (F)

[0085] The composition includes acetone as a component (F). The registration number for acetone is CAS 67-64-1. Dye (G)

[0086] The composition may include a colorant (G). The colorant is chosen so as not to affect the properties of the liquid compositions to which it is added. It only serves to impart color to the liquid composition into which it may be added. Liquid compositions according to the invention: Composition 1: Composition comprising components (A), (B) and (C):

[0087] According to a first embodiment, the liquid composition 1 comprises at least: between 45 and 70%, preferably between 48 and 68%, preferably between 50 and 65%, preferably between 52 and 62% of component (A) which is a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is mostly in the C10-C13 range and whose flash point is between 61 and 80°C measured according to the ASTM D93 standard;between 1 and 10%, preferably between 1 and 8%, preferably between 1 and 7%, preferably between 1.5 and 6% of component (B) which is a mixture of hydrocarbon fractions (B1, B2) whose flash point is between 1 and 20°C measured according to ASTMD56, the hydrocarbon fraction (B1) being a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is mostly in the C9-C10 range and the hydrocarbon fraction (B2) being a fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is mostly in the C7-C9 range;- between 1 and 20%, preferably between 1 and 15%, preferably between 1 and 12% of component (C) which is an oil containing less than 3% by weight relative to the weight of component (C) of dimethyl sulfoxide extract in accordance with standard IP346, and between 1 and 8% by weight relative to the weight of component (C) of at least one additive selected from aliphatic and aromatic and / or phosphate amines or a mixture thereof;

[0088] the percentages of components (A), (B) and (C) being expressed by weight relative to the total weight of liquid composition 1.

[0089] One of the advantages of this composition is that its use requires no mechanical intervention, no immobilization of equipment, no change in the usual operation of equipment, and no change in maintenance programs.

[0090] The cleaning and protection provided by this compound helps maintain optimal performance in diesel and gasoline engines for extended periods. Specifically, its use in diesel and gasoline engines optimizes the air-fuel mixture, facilitates piston ring movement within the piston grooves (movement from the inside to the outside of the piston), thus ensuring better combustion and improved piston sealing within the cylinders. This results in optimal energy transfer (improved compression – increased and / or rebalanced) and consequently reduced fuel consumption and overall improved engine performance (smoothness, responsiveness, power). Furthermore, it allows the oil control rings to reduce excessive amounts of engine oil on the cylinder walls, thereby eliminating excessive engine oil consumption.Vibrations caused by the accumulation of combustion residue deposits inside the engine are limited, thus reducing engine noise. Furthermore, the reduction in internal friction between moving mechanical parts optimizes piston movement within the cylinders, thereby facilitating engine starting.

[0091] Used in diesel and gasoline engines, this composition limits internal friction between moving mechanical parts and oil contamination by combustion residue deposits, thus optimizing lubrication and reducing engine wear. It optimizes the operation of the injection system and therefore the air-fuel mixture, reducing the amount of unburned fuel generated during combustion and consequently lowering pollutant emissions. This composition also cleans and protects metal surfaces, restoring or maintaining optimal performance of diesel and gasoline engines.

[0092] Composition 2: Composition comprising components (A), (B), (C), (E), (F) and (G)

[0093] According to another embodiment, the liquid composition 2 comprises the components (A), (B), (C), (E), (F) and optionally (G).

[0094] This liquid composition 2 may include components (A), (B) and (C) in the quantities previously defined for liquid composition 1 and: between 20 and 40%, preferably between 23 and 37%, preferably between 25 and 35%, preferably again between 28 and 35% of component (E) which is a dearomatized fraction of hydrocarbons as defined above, between 1 and 6%, preferably between 1.5 and 5%, preferably between 2 and 4% of component (F) which is acetone, and possibly, between 0 and 0.01%, preferably between 0 and 0.001% of component (G) which is a dye. the percentages of components (A), (B), (C), (E), (F) and (G) being expressed by weight relative to the total weight of liquid composition 2.

[0095] This liquid composition dissolves and cleans combustion residue deposits accumulated on metal surfaces inside the engine. This composition effectively cleans and protects these metal surfaces, thereby optimizing friction between metal parts and reducing wear on engine components.

[0096] Components (A), (B), and (E) are volatile and evaporate quickly, leaving the surface clean and dry. These components dissolve and clean combustion residue deposits accumulated on metal surfaces inside the engine.

[0097] Component (C) forms a protective lubricating film on metal surfaces, reducing wear and friction. Thanks to the presence of additives, the metal surfaces are better protected against corrosion. This component (C) is stable at high temperatures and can therefore be used in high-temperature applications.

[0098] Acetone (F) also helps dissolve and clean combustion residue deposits accumulated on metal surfaces inside the engine. Furthermore, acetone optimizes fuel vaporization in the combustion chamber, thereby improving combustion and temperature, and thus contributing to the cleaning of the combustion chamber and piston rings.

[0099] Acetone, being lighter than traditional fuels, burns cleaner and therefore boosts octane and cetane numbers, optimizing combustion and thus promoting the cleaning of the combustion chamber and piston rings. Acetone can also play a role in the surface tension of the air-fuel mixture, thereby optimizing its stability.

[0100] Such a composition may have a flash point between 25 and 45°C, preferably between 30 and 40°C, measured according to ASTM D92. It may have a viscosity between 0.1 and 1.2 mm² / s, preferably between 0.4 and 0.8 mm² / s (or cSt), measured according to ASTM D 7279 at 100°C. It may have a viscosity between 0.8 and 1.8 mm² / s, preferably between 1 and 1.4 mm² / s (or cSt), measured according to ASTM D 7279 at 40°C. It may have a density measured at 20°C between 0.700 and 0.900 kg / dm³, preferably between 0.770 and 0.800 kg / dm³, measured according to ASTM D 4052.

[0101] Such a composition 2 makes it possible not to alter the Octane rating of gasoline (according to ASTM D2699), the Cetane rating of Diesel (according to ASTM D613), to improve the lubricating power of diesel (according to ASTM D6079), not to alter the surfaces of metals (those found mainly in the fuel circuits of internal combustion engines gasoline and diesel) and to protect the surfaces of the analyzed metals (according to ASTM D130), not to reduce the masses of the constituent metals of the parts of the fuel circuits of internal combustion engines, not to alter the qualities of the seals (those found mainly in the fuel circuits of internal combustion engines gasoline and diesel) (according to ASTM D471, D412 and D2240).

[0102] A liquid composition 2 may comprise between 50 and 70% of component (A), between 1 and 8% of component (B), between 1 and 12% of component (C), between 20 and 35% of component (E) and, between 1 and 5% of component (F) and possibly between 0 and 0.01%, the percentages of components (A), (B), (C), (E), (F) and (G) being expressed by weight relative to the total weight of the liquid composition 2.

[0103] According to one embodiment, the liquid composition 2 consists solely of components (A), (B), (C), (E), (F) and, optionally (G).

[0104] Other advantages related to a composition including components (A), (B), (C), (E), (F) and (G) will be given in the Examples section.

[0105] Composition 3: Composition comprising components (A), (B), (C), (D), and possibly (G)

[0106] According to another embodiment, the liquid composition 3 comprises the components (A), (B), (C), (D) and optionally (G).

[0107] This liquid composition 3 may include components (A), (B) and (C) in the quantities previously defined for liquid composition 1, and: between 20 and 45% by weight of the total liquid composition, preferably between 25 and 40%, preferably between 28 and 35%, of component (D) as previously defined and optionally, between 0 and 0.01%, preferably between 0 and 0.001% of (G) which is a colorant

[0108] the percentages of components (A), (B), (C), (D) and (G) being expressed by weight relative to the total weight of liquid composition 3.

[0109] Such a liquid composition (3) increases the viscosity index (according to ASTM D2270) of engine oils and improves their lubrication (coefficient of friction measured according to ASTM D6425). These improved engine oils reduce fuel consumption, facilitate cold starts, and optimize wear protection. For example, adding a composition as described in Table 1B at a concentration of 10% of the total volume of an engine oil with a viscosity index of 135 increases that index to 147.

[0110] Such a liquid composition 3 may have a flash point between 60 and 85°C, preferably between 70 and 75°C, measured according to ASTM D92. It may have a viscosity between 1.0 and 3.0 mm² / s, preferably between 1.8 and 2.2 mm² / s (or cSt), measured according to ASTM D 7279 at 100°C. It may have a viscosity between 4.0 and 6.0 mm² / s, preferably between 5.1 and 5.5 mm² / s (or cSt), measured according to ASTM D 7279 at 40°C. It may have a density measured at 20°C between 0.700 and 0.900 kg / dm³, preferably between 0.800 and 0.830 kg / dm³, measured according to ASTM D 4052.

[0111] Such a liquid composition 3 makes it possible to improve the coefficient of friction of the engine oil (ASTM D6425 test), not to alter the surfaces of the metals (those encountered mainly in the engine oil circuits of internal combustion engines of gasoline and diesel engines) and to protect the surfaces of the metals tested (ASTM D5968 test), not to reduce the masses of the metals tested, not to alter the qualities of the seals (those encountered mainly in the engine oil circuits of internal combustion engines of gasoline and diesel engines) to protect the seals, (ASTM D289, D412 and D2240 tests).

[0112] Such a liquid composition 3 comprising components (A), (B), (C) and (D) is suitable for use in a cleaning process according to the invention.

[0113] A liquid composition 3 may comprise between 50 and 62% of component (A), between 1 and 8% of component (B), between 1 and 15% of component (C), between 25 and 35% of component (D) and possibly between 0 and 0.01% of component (G), the percentages of components (A), (B), (C), (D) and (G) being expressed by weight relative to the total weight of the liquid composition 3.

[0114] According to one embodiment, the liquid composition 3 consists solely of components (A), (B), (C), (D) and, optionally (G).

[0115] Other advantages related to a composition including components (A), (B), (C) and (D) will be given in the Examples section. Combination of liquid compositions

[0116] According to another aspect, the invention also relates to a combination of liquid compositions comprising a liquid composition 2 comprising: between 45 and 70% by weight of component (A), between 1 and 10% by weight of component (B), between 1 and 20% by weight of component (C), between 20 and 40% by weight of component (E), between 1 and 6% by weight of component (F) and possibly, between 0 and 0.01 by weight of component (G) and a liquid composition 3 comprising: between 45 and 70% by weight of component (A), between 1 and 10% by weight of component (B), between 1 and 20% by weight of component (C) and between 20 and 45% by weight of component (D) possibly, between 0 and 0.01% by weight of component (G) in a mass ratio between liquid composition 2 and liquid composition 3 of between 20:80 and 80:20, preferably between 35:65 and 65:35, preferably again between 45:55 and 55:45, the percentages of components (A) to (G) being expressed by weight relative to the total weight of liquid compositions 2 and 3. Parts kit

[0117] In another aspect, the invention also relates to a kit of parts comprising: a liquid composition 2 comprising between 45 and 70% of component (A), between 1 and 10% of component (B), between 1 and 20% of component (C), between 20 and 40% of component (E), between 1 and 6% of component (F) and, optionally, between 0 and 0.01% of component (G) and a liquid composition 3 comprising between 45 and 70% of component (A), between 1 and 10% of component (B), between 1 and 20% of component (C), between 20 and 45% of component (D) and, optionally, between 0 and 0.01% of component (G) the percentages of components (A) to (G) being expressed by weight relative to the total weight of liquid compositions 2 and 3. Cleaning process

[0118] The invention relates to a method of cleaning a diesel and petrol internal combustion engine in which a composition according to the invention is added to the fuel tank and / or to the engine oil tank.

[0119] According to a preferred embodiment, in the process of cleaning an internal combustion engine, liquid composition 2, comprising between 45 and 70% by weight of component (A), between 1 and 10% by weight of component (B), between 1 and 20% by weight of component (C), between 20 and 40% by weight of component (E), between 1 and 6% by weight of component (F), and optionally between 0 and 0.01% by weight of component (G) relative to the total weight of liquid composition 2, is added to the fuel tank, and liquid composition 3, comprising between 45 and 70% by weight of component (A), between 1 and 10% by weight of component (B), between 1 and 20% by weight of component (C), between 20 and 45% by weight of component (D), and optionally between 0 and 0.01% by weight of component (G) relative to the total weight of liquid composition 3, is added to the tank of engine oil, the percentages of components (A) to (G) being expressed by weight relative to the total weight of liquid compositions 2 and 3.

[0120] The process of cleaning a thermal engine with the compositions described above can be implemented at a frequency equivalent to 20,000 km traveled or 1,000 hours of operation.

[0121] The term "internal combustion engine" refers to an engine that performs mechanical work using heat (thermal energy) released by internal combustion. An internal combustion engine can be a diesel or gasoline vehicle engine, a generator engine, or a diesel or gasoline engine in specific equipment used in construction machinery, etc.

[0122] This cleaning process is a chemical solution composed of one or two components. It is recommended to add this component(s) to the fuel and engine oil once a year, or at least every 20,000 km. This helps to clean the internal components of diesel and gasoline engines and slow down the fouling process, which inevitably occurs over time due to the accumulation of combustion residue deposits inside the engine caused by incomplete combustion. For generators and specialized equipment such as construction machinery, the frequency of use of the component(s) is determined based on the specific operating conditions of this equipment in its respective environment, but preferably at least every 1,000 operating hours.

[0123] This cleaning procedure can be performed without a prior oil change. If an oil change is performed before 1,000 km, the cleaning procedure is preferably carried out afterward. The effects of the cleaning procedure are immediate, but its effectiveness is maximized after at least 1,000 km.

[0124] In the case of generators and special equipment, such as construction and public works machinery, the effects of the cleaning process are immediate but its effectiveness is at its maximum after at least 24 hours of operation.

[0125] The quantities of the compositions to be used during the cleaning process are determined according to the engine oil capacity. In one embodiment, the composition to be poured into the fuel tank is equivalent to 3 to 12% by volume of the engine oil capacity, preferably between 8 and 10%. In another embodiment, the composition to be poured into the engine oil tank is equivalent to 3 to 12% by volume of the engine oil capacity, preferably between 8 and 10%.

[0126] For the purposes of the invention, "engine oil capacity" is defined by taking into account the total volume of engine oil that can be contained in the engine, including in the oil filter.

[0127] This process allows internal combustion engines to regain and maintain optimal efficiency for longer periods, as this efficiency level has previously degraded over time due to the accumulation of combustion residue deposits inside diesel and gasoline engines. It therefore improves the reliability, availability, and lifespan of equipment while limiting its negative environmental impact. Fuel and engine oil

[0128] In another aspect, the invention relates to a fuel for internal combustion engines comprising a liquid composition 1 or a combination of liquid compositions as described above. In particular, the invention relates to a fuel comprising a liquid composition 2 as described above, comprising components (A), (B), (C), (E), (F), and optionally (G) in the aforementioned proportions.

[0129] In another aspect, the invention relates to an internal combustion engine oil comprising a liquid composition 1 or a combination of liquid compositions as described above. In particular, the invention relates to an internal combustion engine oil comprising a liquid composition 3 as described above, comprising components (A), (B), (C), (D), and optionally (G) in the aforementioned proportions. Use

[0130] The invention relates to the use of one or a combination of liquid compositions as described above to improve the efficiency of internal combustion engines, reduce fuel consumption, decrease pollutant emissions, and slow engine wear. This therefore reduces environmental pollution and improves ecological performance.

[0131] A liquid composition 2 comprising components (A), (B), (C), (E), (F), and optionally (G) in the aforementioned proportions is to be added to the fuel to clean the hottest parts of the engine (combustion chambers and piston rings). A liquid composition 3 comprising components (A), (B), (C), and (D) in the aforementioned proportions is to be added to the engine oil to clean the cooler parts of the engine (lubrication system).

[0132] Reversing the use of the compositions presents no risk but does not allow maximum effectiveness to be achieved.

[0133] These compositions are advantageous in that they can be used regardless of the amount of petrol or diesel in the fuel tank and there is no need to drain the tank when using these compositions.

[0134] Furthermore, these compositions are advantageous because they do not damage engine parts or seals, including in old engines or engines with very high mileage.

[0135] Developed to address the growing challenges of energy efficiency and pollutant emission, this innovative technology aims to improve the performance of diesel and gasoline engines while reducing their fuel consumption and environmental impact. Considering that one liter of diesel consumed is equivalent to 2.67 kg of CO2 emissions and one liter of gasoline consumed is equivalent to 2.28 kg of CO2 emissions, the cleaning process according to the invention makes it possible to limit fuel consumption and thus improve the carbon footprint of internal combustion engines. Indeed, as demonstrated in the examples section, significant fuel reductions are achieved using the compositions according to the invention. Description of the figures

[0136] THE figures 1, 2, 3 show parts of different engines from different vehicles with internal combustion diesel or petrol engines before (left) and after (right) the implementation of the cleaning process according to the invention.

[0137] In particular, the Figures 3A and 3B show parts of a gasoline internal combustion engine from a Nissan Patrol vehicle. Figures 3A and 3B were taken before the cleaning process (mileage 340,474km) and after use of the two compositions according to Tables 1A and 1B below (mileage 342,089 km) and this under normal conditions of use (driving speed between 100 and 110km / h).

[0138] THE figures 4A to 4H They show different parts (piston, cylinder head, valve and, respectively, turbocharger) of a diesel internal combustion engine from a 300 KVA generator set. Figures 4 A, C, E, G (left) and 4 B, D, F, H(right) were taken before (27,744 hours of operation) and after (27,848 hours of operation) use of the two compositions according to Tables 1A and 1B under normal operating conditions (from 0 to 200 Kw). Examples Example 1 - Method for manufacturing the compositions according to the invention

[0139] A composition comprising components (A), (B), (C), (E), (F) and (G) is obtained by mixing the components in the quantities indicated in Table 1A below. Tableau 1A Component REACH registration number % (w / w) (E) 1-2119463258-33 33 (A) 01-2119457273-39 54 (B) 01-2119471843-32 (fraction B1) 6 01-2119473851-33(fraction B2) (F) Acetone 4 (C) Oil containing additives with numbers 01-2119488911-28 and 01-2119493620-38 3

[0140] A composition comprising components (A), (B), (C) and (D) is obtained by mixing the components in the quantities indicated in Table 1B below.

[0141] Table 1B Component REACH registration number % (w / w) (A) 01-2119457273-39 60 (B) 01-2119471843-32 (fraction B1) 4 01-2119473851-33 (fraction B2) (C) Oil containing additives with numbers 01-2119488911-28 and 01-2119493620-38 8 (D) Oil containing compounds with number 01-2119524004-56 and CAS number 84605-29-8 28 Example 2 - Method for cleaning vehicle injectors using the compositions according to the invention

[0142] The cleaning process according to the invention was tested on six Mercedes Sprinter vehicles equipped with diesel engines. These six vehicles exhibited malfunctions (injection system, starting difficulties, loss of power, black smoke from the exhaust). These six vehicles had been taken out of service by the technical services department before the necessary repairs were carried out to return them to service.

[0143] The procedure according to the invention was implemented in the six vehicles prior to the planned repairs. Initial observations were made after 6 to 9 hours of engine operation with the vehicle running, stationary, and driving at reduced speed. The quantities of products used in each vehicle: - 1 liter of the composition according to Table 1A poured into the diesel tank and

[0144] - 1 liter of the composition according to Table 1B poured into the engine oil. The engine oil capacity of this equipment is 11 liters with filter. The results are presented in Table 2 below.

[0145] Table 2 KM of each vehicle Malfunctions observed before the cleaning process The "scan" diagnosis Results after the cleaning process The "scan" diagnosis Test durations (number of malfunctions) (number of malfunctions) 166,786 km Engine starting problems 2 injectors are malfunctioning Engine starts OK 0 9 a.m. 156,122 km Significant decrease in power Optimal power level restored 6 hours 29,160 km The engine won't start when cold. 2 injectors are malfunctioning Cold engine starts OK 0 9 a.m. 29,769 km Engine starting problems 1 injector malfunctions Engine starts OK 0 6 hours Significant decrease in power Optimal power level restored 31,540 km Engine starting problems 2 injectors are malfunctioning Engine starts OK 0 9 a.m. Significant decrease in power Optimal power level restored 260,003 km Significant decrease in power Optimal power level restored 6 hours Black smoke from the exhaust Disappearance of black smoke from the exhaust

[0146] After the cleaning process according to the invention, all six vehicles were returned to service. Diagnostic scans indicated no anomalies in the injection systems; the engines of all six vehicles now start normally, the black exhaust smoke has disappeared, and the engines have all regained optimal power. The planned repairs for the six vehicles were cancelled, and all six vehicles are now in service with no further engine malfunctions. Example 3 - Impact of using the compositions according to the invention on fuel consumption

[0147] The compositions listed in Tables 1A and 1B were used according to the cleaning process of the invention by pouring the composition listed in Table 1A into the fuel tank and the composition listed in Table 1B into the engine oil tank. The quantities were chosen based on the engine oil capacity (between 5% and 10% by volume of the engine oil capacity, including the engine oil contained in the filter).

[0148] The equipment tested was used under normal operating conditions and along the same route under the same conditions (and operating under the same conditions for the generators) before and after the use of the compositions according to the invention. Throughout the tests, the equipment was driven primarily by the same drivers and monitored by the same technicians.

[0149] During the tests, the cars traveled at speeds between 100 and 110 km / h, and the trucks traveled at speeds between 60 and 100 km / h (except for the Kenworth truck, which traveled at an average speed of approximately 23 km / h). The 300 kVA generator set was tested with several increasing loads from 0 to 200 kW in 2-hour cycles. The 1500 kVA generator set operated with several increasing loads from 0 to 800 kVA in 35-minute cycles. The Mercedes Actros truck ran with a 7-tonne load throughout the test. The Kenworth truck ran with a 20-tonne load throughout the test. The Iveco Trakker truck ran with a 10-tonne load throughout the test. The AHV IV seismic vibrator rolled for 2-hour cycles on a 400-meter track and stopped every 100 meters to complete a vibration cycle.

[0150] Data on vehicle mileage before and after the cleaning process, the duration of use of the cleaning solutions, and fuel consumption are presented in Table 3 below. The last column of Table 3 shows the percentage reduction in fuel consumption achieved through the cleaning process. Table 3 Equipment tested Mileage before cleaning process Kilometers after cleaning process Fuel consumption in liters / 100 km or per hour before cleaning process Fuel consumption in liters / 100km or per hour after cleaning process % reduction in fuel consumption Land Cruiser car (petrol) 109996 114542 15.19L / 100 km 13.71 L / 100 km - 9,74 Nissan Patrol 1 (petrol) 340474 341945 17.02 L / 100 km 14.13 L / 100 km - 17 Nissan Patrol 2 car (petrol) 191 666 195 498 18.36 L / 100 km 15.33 L / 100 km -16,50 Iveco Trakker truck (diesel) 1 016 686 1 018 709 38.46 L / 100 km 32.30 L / 100 km - 16 Kenworth truck (diesel) Journey of 1188 km 146.62 L / 100 km 129.17 L / 100 km - 11,90 Mercedes Actros Truck 485 700 487 728 66.98 L / 100 km 58 L / 100 km - 13,41 (diesel) MAN truck (diesel) 206714 211110 28.23 L / 100 km 25.37 L / 100 km - 10,13 Oshkosh truck (diesel) 18997.7 23278 55.10 U100 km 50.79 L / 100 km - 7,82 300 KVA generator (diesel) Duration of use of the compositions = 24 hours 37.50 L / hour 34.22 L / hour - 8.75 1500 KVA (diesel) generator set Duration of use of the compositions = 14 hours and 05 minutes 121.90 L / hour 105.81 L / hour - 13.19 AHV IV seismic vibrator (diesel) Duration of use of the compositions = 20 hours 68.50 L / hour 59.25 L / hour - 13.50

[0151] It should be noted that in the case of the 300 kVA generator set, it was tested with several loads (from 0 to 200 kW). Before the cleaning process, the generator set only withstood the 200 kW load for 8 minutes, whereas after the cleaning process, the generator set withstood the same 200 kW load for 1 hour, and it was the technician who shut down the generator set engine to end the test.

[0152] For each of the tests, the technicians indicated that the engines were quieter and the equipment operated more smoothly and agilely.

[0153] The reduction in fuel consumption is a consequence of reduced friction. Indeed, reducing engine fouling reduces friction. Thus, the engine's mechanical parts will require less energy to move because the reduced friction facilitates their movement. Consequently, engine wear decreases, and less energy (in this case, fuel) is needed to set the engine's mechanical parts in motion. After the cleaning process according to the invention, the engine is less dirty ( Figures 1 to 4 ), fuel consumption decreases (Table 3). The reduction in fuel consumption is also a result of improved combustion and compression (see example below).

[0154] Considering that one liter of diesel consumed is equivalent to 2.67 kg of CO2 emitted and that one liter of gasoline consumed is equivalent to 2.28 kg of CO2 emitted, it becomes evident that the cleaning process according to the invention makes it possible to improve the carbon footprint of internal combustion engines. Example 4 - Impact of using the compositions according to the invention on the wear rate of equipment

[0155] The equipment was tested under the same conditions as in Example 3. The equipment and fuel consumption of this equipment (before and after the cleaning process) are the same as those shown in Table 3 above.

[0156] The wear rate was analyzed on samples of unused (control) engine oil, used oil before the cleaning process, and used oil after the cleaning process, under the same operating conditions and for the same durations (kilometers or hours) before and after the cleaning process. ICP spectrometric analysis ( Inductively Coupled Plasma) The ASTM D5185 method detects metals that can contaminate oil due to mechanical wear. Spectrometric analysis indicates the condition of the equipment and its parts and components. Iron particles can originate from the wear of several critical parts such as cylinders, pistons, piston rings, and connecting rods. The results relating to the reduction (in %) of metal content in engine oil samples before and after cleaning, taking into account their presence in the control, are presented in Table 4 below. Table 4 Equipment tested (%) iron rate reduction (%) reduction in aluminum content (%) reduction in chromium rate (%) reduction in copper rate (%) reduction in lead content Land Cruiser car (petrol) - 28,57 / / / / MAN truck (diesel) - 50 / / / / Oshkosh truck (diesel) - 45,28 / / -100 / 300 KVA generator (diesel) - 93.55 -100 -100 -92,94 -90,19 AHV IV seismic vibrator (diesel) - 20 / / -100 -100

[0157] A reduction in engine wear rate is observed in all cases. Example 5 - Impact of using the compositions according to the invention on the compression of the internal combustion engines of the equipment

[0158] The Nissan Patrol car was tested under the same conditions as those shown in Example 3.

[0159] The compression of an engine can be represented as its ability to compress air in each of the combustion chambers. It therefore refers to the moment when the piston is at top dead center (its highest position).

[0160] The results are presented in Table 5 below. Table 5 Nissan Patrol car (petrol) Vehicle compression without cleaning process (psi) Vehicle compression with cleaning process (psi) % average increase in compressions Cylinder 1 111 140 + 22,5 Cylinder 2 109 135 Cylinder 3 105 120 Cylinder 4 102 120 Cylinder 5 102 128 Cylinder 6 102 130

[0161] An increase in compression is observed in all cases.

[0162] Reducing engine fouling optimizes combustion and increases compression. As a result, the energy released during each explosion increases and engine efficiency improves.

[0163] The increased compression is due to improved combustion and engine sealing. The cleaning process reduced fouling in the combustion chamber and piston grooves. When the combustion chamber and piston grooves are fouled, combustion quality deteriorates and the piston rings can no longer seat properly in the grooves.

[0164] Without the cleaning process, fouling accumulates in the combustion chamber and in the piston grooves:

[0165] - Combustion deteriorates, engine fouling accelerates, and the piston rings are constantly pushed against the cylinders.

[0166] - Friction between the piston rings and cylinders increases,

[0167] - Wear on the piston rings and cylinders accelerates, and gaps appear between the rings and cylinders.

[0168] - part of the combustion gases are no longer evacuated but escape between the segments and the cylinders into the engine oil (the engine's sealing decreases).

[0169] These gases contaminate the engine oil. As a result, the quality of engine lubrication and compression decrease.

[0170] Conversely, thanks to the cleaning process, the quality of engine lubrication and compression increase.

[0171] The increase in compression is also a result of better combustion.

[0172] The cleaning process reduced the fouling of the combustion chamber.

[0173] The more the air-fuel mixture is optimized through combustion chamber cleaning, the more powerful the explosion. The more powerful the explosion, the higher the piston speeds in the cylinders, and therefore the higher the compression ratio. The cleaning process makes the engine more powerful and responsive. Example 6 - Impact of using the compositions according to the invention on fuels

[0174] The properties of the fuels were analyzed after adding the composition listed in Table 1A at a concentration of 5% relative to the total amount of liquid in the tank. At 5%, the tank is assumed to be nearly empty. The results and the standards used to measure these properties are presented in Table 6 below. Table 6 Standard Property Composition according to Table 1A Essence after addition of the composition according to Table 1A Diesel fuel after the addition of the composition according to Table 1A ASTM D2699 Octane Rating* / 95.6 ± 0.2 with the composition compared to 97.7 ± 0.2 without the composition / ASTM D613 Cetane Number** / / 53.8 ± 0.9 with the composition compared to 54.3 ± 0.9 without the composition ASTM D6079 Lubricating power (HFRR) (pm) / 268 with the composition compared to 277 without the composition *Minimum Octane Index CF EN 228 / 2012 = 95 ** Minimum Cetane Number CF EN 590 / 1993 = 49

[0175] The use of the composition according to the invention does not alter the Octane rating of gasoline (according to ASTM D2699), the Cetane rating of Diesel (according to ASTM D613) and improves the lubricating power of diesel (according to ASTM D6079). Example 7 - Impact of using the compositions according to the invention on engine oils

[0176] The coefficient of friction of ACTIVA 5000 engine oil, alone or with a composition from Table 1B present at 5%, 8%, and 10%, respectively, was measured according to the ASTM D6425 test. Adding a composition from Table 1B to the engine oil also reduces its coefficient of friction and results in a more linear friction curve by increasing the concentration of the Table 1B composition, as illustrated in the... Figure 5 representing the coefficient of friction p as a function of time, that is to say the value and stability of the coefficient of friction. Example 8 - Impact of using the compositions according to the invention on the metal parts composing the fuel circuit and the engine oil circuit

[0177] The safety and protective properties of the compositions according to the invention towards the metallic components of the fuel and engine oil circuits in internal combustion engines were verified according to the test procedures of ASTM D130 (fuel circuit) and ASTM D5968 (lubricant circuit), exceeding the standard durations of these two tests (3 to 336 hours for the ASTM D130 test and 168 to 336 hours for the ASTM D5968 test). The metals tested by surface analysis using EDX (energy-dispersive X-ray spectroscopy) and the corresponding mechanical components likely to contain these metals are presented in Table 7.

[0178] The tests demonstrate that the use of the compositions according to the invention does not damage the metal parts of the fuel and engine oil circuits, protects the metal parts of the fuel and engine oil circuits, and improves engine lubrication (preserving lubricant quality). The loss of metal mass (not observed during these tests) indicates dissolution, while the gain in mass reflects the composition's action against deposits or oxidation by creating a protective layer (observed during these tests for lead in the diesel fuel circuit). Table 7 METALS DIESEL + 10% composition Table 1A (surface analysis by EDX) PETROL + 10% composition Table 1A (surface analysis by EDX) ENGINE OIL + 10% composition according to Table 1B (surface analysis by EDX) TIN No significant effect (fuel circuit: segment coating) No significant effect (engine oil circuit: camshaft bearing coating, piston ring coating, bearing coating) STAINLESS STEEL (Cr, Ni) No significant effect (cleaner appearance) (fuel circuit: spark plug, injector) No significant effect (engine oil circuit: connecting rod) Cast iron No significant effect (fuel circuit: combustion chamber, piston, cylinder) Protective action against iron dissolution (engine oil circuit: camshaft, crankshaft, crankcase) ALUMINUM No significant effect (fuel circuit: piston) Protective action against aluminum oxidation (engine oil circuit: camshaft, piston) COPPER No significant effect (fuel circuit: spark plug) Protective action through the formation of a protective layer with an increase in copper mass and a decrease in the presence of zinc (engine oil additives) (engine oil circuit: cylinder head gasket, bearing) LEAD No significant effect (fuel circuit: segment coating, alloy component) Protective action through the formation of a protective layer with an increase in lead mass and a decrease in the presence of zinc (engine oil additives) (engine oil circuit: camshaft bearing coating, piston coating, bearing) MOLYBDENUM No significant effect (fuel circuit: segment coating, alloy component) Protective action against the oxidation of molybdenum which causes cracking (engine oil circuit: alloy component) STEEL (IRON) Creation of a protective carbon layer (fuel circuit: combustion chamber, piston ring, cylinder, spark plug, injector) Creation of a protective carbon layer (engine oil circuit: cylinder head gasket, piston rings) Example 8 - Impact of using the compositions according to the invention on the seals present in the fuel circuit and in the engine oil circuit

[0179] The compatibility of the compositions according to the invention with the seals present in the fuel circuit and in the engine oil circuit in internal combustion engines has been verified. Fuel

[0180] The ASTM D471 test was implemented by immersing the tested seals in diesel at 51.7°C or in gasoline at 25°C, with or without the composition according to Table 1A, for 168 hours (maximum duration of the standard test).

[0181] Extreme testing conditions: Diesel (sold under the name Total First) + 10% composition according to Table 1A Petrol (sold under the name Total Super 95 Unleaded) + 10% composition according to Table 1A The tested seals are shown in Table 8A. Tableau 8A 1 gasket sample for each test Joints Standard abbreviation (ASTM, ISO,...) Examples of trade names Fuel system (diesel or petrol) BUTADIENE NITRILE NBR / XNBR PERBUNAN ®< NIPOL ®< Fuel tank cap seal KRYNAC ®< Fuel hose PARACRIL ®< Breather pipe BUNA N ®< SILICONE Q / MQ / VMQ / PMQA SILOPREN ®< Breather pipe SILASTIC ®< ELASTOSIL ®< FLUORIDED FPM / FKM VITON ®< Fuel hose Breather pipe FLUOREL ®< Sealing ring Engine oil

[0182] The ASTM D289 test was implemented by immersing the tested seals in engine oil at 150°C, with or without the composition according to Table 1B, for 168 hours (maximum duration of the standard test). Extreme testing conditions:

[0183] Engine oil marketed under the name Total Activa 5000 15W40 + 10% engine oil, composition according to Table 1B 1 gasket sample for each test The tested seals are shown in Table 8B.

[0184] Table 8B Joints Standard abbreviation (ASTM, ISO,...) Examples of trade names Engine oil circuit BUTADIENE NITRILE NBR / XNBR HYTEMP ®< Sealing ring (camshaft) SILICONE Q / MQ / VMQ / PMQ SILOPREN ®< Valve seal SILASTIC ®< ELASTOSIL ®< FLUORIDED FPM / FKM VITON ®< Sealing ring (camshaft) FLUOREL ®< In both cases, the data collected is:

[0185] Elongation at break according to ASTM D412: maximum elongation length before breakage of the sample;

[0186] Increase in mass: the more the mass of the seal increases, the more the quality of the seal deteriorates.

[0187] The test results are presented in Table 8C which show the variation in terms of resistance to elongation at break and the change in mass for each of the types of seals tested in the presence of diesel and gasoline with or without the addition of 10% composition according to Table 1A and engine oil with or without the addition of 10% composition according to Table 1B. Table 8C NBR FKM VMQ Die sel Essence Oil Diesel Essence Oil Diesel Essence Oil Elongation before rupture M +10% M M +5% +25% M M +70% mass increase M -10% M M M M M M M M - Properties maintained

[0188] The results show that, when added to diesel, the composition of the invention does not alter the properties of the seals.

[0189] Similarly, the results show that when added to gasoline, the composition of the invention increases (for NBR and FKM seals) the maximum force required to stretch a sample until it breaks and reduces the increase in mass.

[0190] Finally, the results show that when added to engine oil, the composition of the invention increases (for FKM and VMQ seals) the maximum force required to stretch a sample until it breaks.

[0191] Moreover, in each case, the solidity was maintained. Example 9 - Impact of using the compositions according to the invention on the cold start of internal combustion engines of the equipment

[0192] Delphi Corporation is one of the world's leading automotive suppliers (OEM: Original Equipment Manufacturer). At its Technical Center in Luxembourg (27,000 m2), Delphi Corporation conducted tests to measure the effectiveness of the compositions according to the invention on the cold starts of an internal combustion engine.

[0193] The electrical consumption required to start the internal combustion engine before and after the use of the compositions according to the invention was measured. Test protocol:

[0194] Searching for potential leaks on vehicles (engine oil, coolant, exhaust, etc.) and repairing if necessary. Draining the engine oil and adding the reference engine oil for the test. Draining the fuel tank and adding the reference fuel for the test. Measuring the electrical consumption required to start the engine at different ambient temperatures (0°, -5°, -10° and -15°C). Adding the composition according to Table 1A to the fuel tank and the composition according to Table 1B to the engine oil. Conducting a 1,500 km drive on roads and highways under normal operating conditions. Searching for potential leaks on vehicles (engine oil, coolant, exhaust, etc.).) and repair if necessary. Draining the engine oil and adding the reference engine oil for the test. Measuring the electrical consumption required to start the engine at different ambient temperatures (0°, -5°, -10° and -15°C). Analysis of the results.

[0195] It was found that the electrical consumption required to start the engine when cold was reduced by up to 23% for the diesel vehicle and up to 25% for the petrol vehicle. Example 10 - Impact of using the compositions according to the invention on fuel consumption and pollution from internal combustion engines of the equipment

[0196] In its Technical Centre in Luxembourg (27,000 m2), Delphi Corporation carried out tests to measure the effectiveness of the compositions according to the invention on pollution from diesel and petrol internal combustion engines.

[0197] Fuel consumption and pollution emitted by the operation of the internal combustion engine before and after the use of the compositions according to the invention were measured. Test protocol (FTP 75 - United States Environmental Protection Agency EPA: United States Environmental Protection Agency

[0198] Search for potential leaks on vehicles (engine oil, coolant, exhaust, etc.) and repair if necessary. Draining the engine oil and adding the reference engine oil for the test. Draining the fuel tank and adding the reference fuel for the test. Performing the EPA (FTP75) dry run test to verify the proper functioning of the equipment. Performing the EPA (FTP75) test to measure fuel consumption and emissions. Adding the composition according to Table 1A to the fuel tank and the composition according to Table 1B to the engine oil. Conducting a 1,500 km drive on roads and highways under normal operating conditions. Searching for potential leaks on vehicles (engine oil, coolant, exhaust, etc.).) and repair if necessary. Draining the engine oil and adding the reference engine oil for the test. Performing the EPA test (FTP75) to measure fuel consumption and pollution. Analyzing the results.

[0199] It was found that fuel consumption decreased by 15% for the diesel vehicle and by 17% for the petrol vehicle and that pollution decreased by 20% for the diesel vehicle and by 37% for the petrol vehicle.

[0200] The positive environmental impact of the compositions according to the invention is undeniable.

Claims

1. Liquid composition comprising at least: - between 45 and 70% of component (A), which is a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons, the majority of whose carbon number is in the C10-C13 range and whose flash point is between 61 and 80°C measured according to ASTM D93; - between 1 and 10% of component (B), which is a mixture of hydrocarbon fractions (B1, B2) with a flash point between 1 and 20°C measured according to ASTM D56, the hydrocarbon fraction (B1) being a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons, the majority of whose carbon number is in the C9-C10 range, and representing between 1 and 20% by weight relative to the weight of component (B1). (B) and the hydrocarbon fraction (B2) being a fraction of hydrocarbons selected from n-alkanes, isoalkanes,and cyclic hydrocarbons whose carbon number is predominantly in the C7-C9 range and which constitute between 80 and 99% by weight relative to the weight of component (B); - between 1 and 20% of component (C), which is an oil containing less than 3% by weight of dimethyl sulfoxide in accordance with standard IP346, and between 1 and 8% by weight relative to the weight of component (C) of at least one additive selected from aliphatic and aromatic and / or phosphate amines or a mixture thereof; the percentages of components (A), (B) and (C) being expressed by weight relative to the total weight of the liquid composition.

2. Liquid composition according to claim 1 further comprising between 20 and 40% of component (E) which is a dearomatized fraction of hydrocarbons selected from n-alkanes, isoalkanes, and cyclic hydrocarbons whose number of carbons is predominantly in the range C9-C11 and whose flash point is between 41 and 60°C measured according to ASTMD56 and - between 1 and 6% of component (F) which is acetone and - optionally, between 0 and 0.01 of component (G) which is a dye the percentages of components (A), (B), (C), (E), (F) and (G) being expressed by weight relative to the total weight of the liquid composition.

3. Liquid composition according to claim 1 further comprising between 20 and 45% of component (D), which is an oil comprising at least one additive, less than 3% by weight relative to the weight of component (D) of dimethyl sulfoxide extract in accordance with IP346, and at least one base oil having a viscosity of less than 20.5 cSt, measured at 40°C according to ASTM D445, the base oil being at least one compound selected from the following: - a light naphthenic distillate of hydrotreated petroleum having CAS registration number 64742-53-6, - a heavy paraffinic distillate of hydrotreated petroleum having CAS registration number 64742-54-7, - a light paraffinic distillate of hydrotreated petroleum having CAS registration number 64742-55-8, - a petroleum distillate, light paraffin solvent, wax-free having CAS registration number 64742-56-9, - a petroleum distillate, heavy paraffin solvent,wax-free, CAS registration number 64742-65-0; hydrogenated polydecene-1, CAS registration number 68037-01-4; a blend of hydrotreated oil-based, 15-30 carbon-neutral petroleum lubricating oils, CAS registration number 72623-86-0; a blend of hydrotreated oil-based, 20-50 carbon-neutral oils, CAS registration number 72623-87-1; white mineral petroleum oil, CAS registration number 8042-47-5; a blend of branched, cyclic, and linear hydrocarbon oils, 18-50 carbon atoms, CAS registration number 848301-69-9; and 1-decene tetramer mixed with 1-decene. trimer, - hydrogenated having CAS registration number 68649-12-7, - 1-dodecene, polymer blended with 1-decene, hydrogenated having CAS registration number 151006-60-9, - 1-decene, polymer blended with 1-octene and 1-dodecene,hydrogenated having CAS registration number 163149-28-8, - a heavy paraffinic petroleum distillate having CAS registration number 64741-88-4 - or a mixture thereof, the percentages of components (A), (B), (C), (D) and (G) being expressed by weight relative to the total weight of the liquid composition.

4. Combination of liquid compositions comprising a liquid composition according to claim 2 and a liquid composition according to claim 3 in a mass ratio between the liquid composition according to claim 2 and the liquid composition according to claim 3 of between 20:80 and 80:20, preferably between 35:65 and 65:35, preferably again between 45:55 and 55:

45.

5. Kit of parts comprising: - a composition according to claim 2 and - a composition according to claim 3.

6. Method for cleaning a heat engine in which the composition according to claim 1 or a combination of liquid compositions according to claim 4 is added to the engine oil tank and / or to the fuel tank.

7. Method for cleaning a heat engine in which the composition according to claim 2 is added to the fuel tank and the composition according to claim 3 is added to the engine oil tank.

8. Internal combustion engine fuel comprising a liquid composition according to any one of claims 1 to 3 or a combination of liquid compositions according to claim 4.

9. Internal combustion engine oil comprising a liquid composition according to any one of claims 1 to 3 or a combination of liquid compositions according to claim 4.

10. Use of a liquid composition according to any one of claims 1 to 3 or of a combination of liquid compositions according to claim 4 or of a kit of parts according to claim 5 to improve the performance, in particular ecological performance, of an internal combustion engine, to reduce fuel consumption and engine wear or to decrease environmental pollution.

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