Engine lubrication system cleaning oil

Abstract

The present invention provides an engine lubrication system cleaning oil, the ingredients include: 60-75% base oil and 25-40% functional additives; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in any mass ratio; the functional additives include by weight: 1-5 parts of organic boron lubricant, 2-5 parts of cleaning dispersant, 0.3-1 parts of antioxidant, 5-15 parts of auxiliary agent, 0.1-0.5 parts of rust inhibitor, 0.0001-0.0005 parts of fatty amine and ethylene oxide condensate, 3-5 parts of carbon deposit cleaning agent and 4-8 parts of dispersant. The present invention adopts cycloalkyl base oil and organic boron lubricant with good lubricity, and adds carbon deposit cleaning agent and high-performance cleaning dispersant to prepare the engine lubrication system cleaning oil, which does not require a special cleaning machine during cleaning. Before changing the engine oil, the old engine oil is drained, and the cleaning oil is added to run rapidly for 10-15min to achieve the cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of special lubricating oils, and in particular to cleaning oil for an engine lubricating system. Background Art

[0002] The formation mechanism of carbon deposits is that the fuel and the products of incomplete combustion of the fuel and the lubricating oil that enters the combustion chamber cannot be fully burned due to insufficient oxygen supply in the combustion chamber, thereby generating carbon particles and oil smoke, which adhere to the piston surface. They are mixed with the lubricating oil and oxidized to form the initial carbon deposit-hydroxy acid. Then the formed hydroxy acid is further oxidized into resinous colloids in the combustion chamber due to the high temperature and high pressure working environment, and tightly adheres to the piston surface. As the engine running time increases, these resinous colloids continue to increase and continue to gather. Under the action of high pressure in the cylinder, the colloids will fit more and more tightly, and finally form carbon deposits. At present, the carbon deposit removal methods on the market mostly use mixed solvents or surfactant cleaning agents to clean the engine through a special cleaning machine. Although the cleaning effect is good, it lacks lubricity and the cleaning process will cause wear to the engine. In addition, this cleaning method cannot be operated by the owner by himself, and needs to be carried out in a professional service department. Therefore, there are problems such as inconvenience, involuntary and high cost. Summary of the invention

[0003] Technical problem to be solved: In view of the above problems, the present invention provides an engine lubrication system cleaning oil, which is prepared by adopting cycloalkyl base oil (400N base oil, 500N base oil and 650N base oil) with good lubricity and organic boron lubricant, and adding carbon deposit cleaning agent and high-performance detergent dispersant. The engine lubrication system cleaning oil does not require special cleaning machinery for cleaning. Before changing the engine oil, drain the old engine oil, add the cleaning oil and run rapidly for 10-15 minutes to achieve the cleaning effect.

[0004] Technical solution: An engine lubrication system cleaning oil, comprising, by weight percentage: 60-75% base oil and 25-40% functional additives; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in any mass ratio.

[0005] Preferably, the functional additives include, by weight: 1 to 5 parts of organic boron lubricant, 2 to 5 parts of detergent dispersant, 0.3 to 1 part of antioxidant, 5 to 15 parts of auxiliary agent, 0.1 to 0.5 part of rust inhibitor, 0.0001 to 0.0005 parts of fatty amine and ethylene oxide condensate, 3 to 5 parts of carbon deposit cleaning agent and 4 to 8 parts of dispersant.

[0006] Preferably, the organic boron lubricant is one or more of pentadecyl boron, oleic acid diethanolamide borate and tall oil diethanolamide borate; the antioxidant is octyl diphenylamine and / or alkylated diphenylamine; the auxiliary agent is one or more of glycerol acetone acetal, dibasic acid ester and dimethyl ester of sunflower glycol.

[0007] Preferably, the detergent dispersant is one or more of high-based synthetic calcium sulfonate, superbased synthetic magnesium sulfonate and sulfided alkyl phenate calcium.

[0008] Preferably, the formula of the carbon deposit cleaning agent is as follows by weight percentage: 6% to 8% of alkylphenol polyoxyethylene ether, 4% to 6% of fatty alcohol polyoxyethylene ether, 1% to 2% of fatty alcohol polyoxyethylene ether sodium sulfate, 2% to 4% of sodium dodecylbenzene sulfonate, 3% to 5% of high heat dissipation ceramic particles, 0.8% of sodium carbonate, 1.5% of sodium silicate, 0.8% of sodium citrate, and the balance of water.

[0009] Preferably, the preparation method of the high heat dissipation ceramic particles is as follows:

[0010] Step 1: Add 5-7 wt.% of calcium carbonate and 1.4 wt.% of calcium fluoride to aluminum nitride powder, and perform ball milling to obtain particles with a particle size of less than 2 μm;

[0011] Step 2: under heating conditions, adding 22 wt.% paraffin wax and 0.3-0.7 wt.% oleic acid and stirring to obtain a slurry;

[0012] Step 3: Pour into a hot die casting machine and form at a temperature of 60-80°C and a pressure of 0.6 MPa to obtain a green billet;

[0013] Step 4: Debinding: The green blank is embedded with alumina powder calcined at 1400°C as an adsorbent, and the temperature is raised from room temperature to 300°C for debinding;

[0014] Step 5: Transfer to a hot press furnace, sinter at 1750-1850°C for 3-5 h, and inject N2 as a protective atmosphere;

[0015] Step 6: Take out, cool and then crush to obtain high heat dissipation ceramic particles with rough surface.

[0016] Preferably, the particle size of the high heat dissipation ceramic particles is 1 to 100 μm.

[0017] Preferably, the rust inhibitor is one or more of benzotriazole, toluenetriazole and thiadiazole derivatives.

[0018] Preferably, the dispersant is one or more of polyisobutylene bissuccinimide, boronated polyisobutylene succinimide and high molecular weight succinimide.

[0019] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0020] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0021] (2) uniformly mixing an organic boron lubricant, a detergent dispersant, an antioxidant, an auxiliary agent, a rust inhibitor, a fatty amine and ethylene oxide condensate, a carbon deposit cleaning agent and a dispersant to obtain a functional additive;

[0022] (3) Slowly add the functional additives into the base oil, control the temperature at 60-80°C, and stir while adding until the stirring is complete. Beneficial Effects

[0023] The carbon deposit cleaning agent used in the present invention contains high heat dissipation ceramic particles. The high heat dissipation ceramic particles continuously collide with carbon deposits during the operation of the engine, causing the carbon deposits to fall off faster and react with other chemical components.

[0024] Calcium carbonate is added to the high heat dissipation ceramic particles during the preparation process of the present invention. Calcium carbonate forms many small pores in the ceramic during the sintering process. After the ceramic is crushed, many small pores are formed on the surface, resulting in a rough surface of the high heat dissipation ceramic particles, which makes it easier to remove carbon deposits by friction and impact.

[0025] The high heat dissipation ceramic particles in the present invention also have high heat dissipation, which is more conducive to heat dissipation during the operation of the engine and improves the service life of the engine.

[0026] The present invention adopts cycloalkyl base oil (400N base oil, 500N base oil and 650N base oil) with good lubricity and organic boron lubricant, and adds carbon deposit cleaning agent and high-performance detergent dispersant to prepare the cleaning oil of engine lubrication system. No special cleaning machine is required for cleaning. Before changing the engine oil, the old engine oil is drained, and the cleaning oil is added and rapidly run for 10-15 minutes to achieve the cleaning effect.

[0027] The cleaning oil of the present invention has excellent cleaning effect, good lubricity and pre-lubricity, does not harm the engine, has good compatibility with various types of engine oils, can effectively extend the engine life, improve power, and reduce engine noise. In addition, the car owner can operate it by himself, and it is easy to use. DETAILED DESCRIPTION

[0028] The present invention proposes an engine lubrication system cleaning oil. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention will be further described in detail with reference to the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Example 1

[0029] The preparation method of high heat dissipation ceramic particles is as follows:

[0030] Step 1: Add 5wt.% of calcium carbonate and 1.4wt.% of calcium fluoride to aluminum nitride powder, and perform ball milling to obtain particles with a particle size of less than 2μm;

[0031] Step 2: under heating conditions, adding 22 wt.% paraffin wax and 0.5 wt.% oleic acid and stirring to obtain a slurry;

[0032] Step 3: Pour into a hot die casting machine and form at a temperature of 70°C and a pressure of 0.6 MPa to obtain a green billet;

[0033] Step 4: Debinding: The green blank is embedded with alumina powder calcined at 1400°C as an adsorbent, and the temperature is raised from room temperature to 300°C for debinding;

[0034] Step 5: Transfer to a hot press furnace, sinter at 1800°C for 4 hours, and inject N2 as a protective atmosphere;

[0035] Step 6: Take out, cool and then crush to obtain high heat dissipation ceramic particles with rough surface.

[0036] The particle size of the high heat dissipation ceramic particles is 1 to 100 μm. Example 2

[0037] The preparation method of high heat dissipation ceramic particles is as follows:

[0038] Step 1: Add 6wt.% of calcium carbonate and 1.4wt.% of calcium fluoride to aluminum nitride powder, and perform ball milling to obtain particles with a particle size of less than 2μm;

[0039] Step 2: under heating conditions, adding 22 wt.% paraffin wax and 0.5 wt.% oleic acid and stirring to obtain a slurry;

[0040] Step 3: Pour into a hot die casting machine and form at a temperature of 70°C and a pressure of 0.6 MPa to obtain a green billet;

[0041] Step 4: Debinding: The green blank is embedded with alumina powder calcined at 1400°C as an adsorbent, and the temperature is raised from room temperature to 300°C for debinding;

[0042] Step 5: Transfer to a hot press furnace, sinter at 1800°C for 4 hours, and inject N2 as a protective atmosphere;

[0043] Step 6: Take out, cool and then crush to obtain high heat dissipation ceramic particles with rough surface.

[0044] The particle size of the high heat dissipation ceramic particles is 1 to 100 μm. Example 3

[0045] The preparation method of high heat dissipation ceramic particles is as follows:

[0046] Step 1: Add 7wt.% of calcium carbonate and 1.4wt.% of calcium fluoride to aluminum nitride powder, and perform ball milling to obtain particles with a particle size of less than 2μm;

[0047] Step 2: under heating conditions, adding 22 wt.% paraffin wax and 0.5 wt.% oleic acid and stirring to obtain a slurry;

[0048] Step 3: Pour into a hot die casting machine and form at a temperature of 70°C and a pressure of 0.6 MPa to obtain a green billet;

[0049] Step 4: Debinding: The green blank is embedded with alumina powder calcined at 1400°C as an adsorbent, and the temperature is raised from room temperature to 300°C for debinding;

[0050] Step 5: Transfer to a hot press furnace, sinter at 1800°C for 4 hours, and inject N2 as a protective atmosphere;

[0051] Step 6: Take out, cool and then crush to obtain high heat dissipation ceramic particles with rough surface.

[0052] The particle size of the high heat dissipation ceramic particles is 1 to 100 μm.

[0053] Surface roughness measurement: measured using an electric stylus profilometer in accordance with national standards (GB / T 3503-2009);

[0054] Hardness (H RA ) determination: static load indentation method for hardness (H RA ) for determination.

[0055] Table 1

[0056] Surface roughness (μm) <![CDATA[Hardness (H RA ) <!-- 3 -->]]> Example 1 0.6821±0.2591 72.2 Example 2 0.6997±0.1483 72.9 Example 3 0.6948±0.2146 72.5

[0057] As shown in Table 1, the surface roughness and hardness of Example 2 are the best, so the high heat dissipation ceramic particles prepared in Example 2 are selected in the subsequent examples. Example 4

[0058] The formula of the carbon deposit cleaning agent is as follows by weight percentage: 7% alkylphenol polyoxyethylene ether, 5% fatty alcohol polyoxyethylene ether, 1.5% fatty alcohol polyoxyethylene ether sodium sulfate, 3% sodium dodecylbenzene sulfonate, 3% high heat dissipation ceramic particles prepared in Example 2, 0.8% sodium carbonate, 1.5% sodium silicate, 0.8% sodium citrate, and the balance water. Example 5

[0059] The formula of the carbon deposit cleaning agent is as follows by weight percentage: 7% alkylphenol polyoxyethylene ether, 5% fatty alcohol polyoxyethylene ether, 1.5% fatty alcohol polyoxyethylene ether sodium sulfate, 3% sodium dodecylbenzene sulfonate, 4% high heat dissipation ceramic particles prepared in Example 2, 0.8% sodium carbonate, 1.5% sodium silicate, 0.8% sodium citrate, and the balance water. Example 6

[0060] The formula of the carbon deposit cleaning agent is as follows by weight percentage: 7% alkylphenol polyoxyethylene ether, 5% fatty alcohol polyoxyethylene ether, 1.5% fatty alcohol polyoxyethylene ether sodium sulfate, 3% sodium dodecylbenzene sulfonate, 5% high heat dissipation ceramic particles prepared in Example 2, 0.8% sodium carbonate, 1.5% sodium silicate, 0.8% sodium citrate, and the balance water. Example 7

[0061] An engine lubrication system cleaning oil comprises, by weight percentage, 60% of a base oil and 40% of a functional additive; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in a mass ratio of 1:1:1; the functional additive comprises, by weight, 3 parts of organic pentadecyl boron, 4 parts of high base synthetic calcium sulfonate, 0.7 parts of octyl diphenylamine, 10 parts of acetone glycerol, 0.3 parts of benzotriazole, 0.0003 parts of a condensate of a fatty amine and ethylene oxide, 4 parts of a carbon deposit cleaning agent prepared in Example 6 and 6 parts of polyisobutylene bissuccinimide.

[0062] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0063] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0064] (2) mixing organic pentadecyl boron, high base synthetic calcium sulfonate, octyl diphenylamine, acetone glycerol, benzotriazole, aliphatic amine and ethylene oxide condensate, the carbon deposit cleaning agent prepared in Example 6 and polyisobutylene bissuccinimide to obtain a functional additive;

[0065] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Example 8

[0066] An engine lubrication system cleaning oil comprises, by weight percentage, 65% of a base oil and 35% of a functional additive; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in a mass ratio of 1:1:1; the functional additive comprises, by weight, 3 parts of organic pentadecyl boron, 4 parts of high base synthetic calcium sulfonate, 0.7 parts of octyl diphenylamine, 10 parts of acetone glycerol, 0.3 parts of benzotriazole, 0.0003 parts of a condensate of a fatty amine and ethylene oxide, 4 parts of a carbon deposit cleaning agent prepared in Example 6 and 6 parts of polyisobutylene bissuccinimide.

[0067] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0068] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0069] (2) mixing organic pentadecyl boron, high base synthetic calcium sulfonate, octyl diphenylamine, acetone glycerol, benzotriazole, aliphatic amine and ethylene oxide condensate, the carbon deposit cleaning agent prepared in Example 6 and polyisobutylene bissuccinimide to obtain a functional additive;

[0070] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Example 9

[0071] An engine lubrication system cleaning oil comprises, by weight percentage, 70% of a base oil and 30% of a functional additive; the base oil is a mixture of a 400N base oil, a 500N base oil and a 650N base oil in a mass ratio of 1:1:1; the functional additive comprises, by weight, 3 parts of organic pentadecyl boron, 4 parts of high base synthetic calcium sulfonate, 0.7 parts of octyl diphenylamine, 10 parts of acetone glycerol, 0.3 parts of benzotriazole, 0.0003 parts of a condensate of a fatty amine and ethylene oxide, 4 parts of a carbon deposit cleaning agent prepared in Example 6 and 6 parts of polyisobutylene bissuccinimide.

[0072] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0073] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0074] (2) mixing organic pentadecyl boron, high base synthetic calcium sulfonate, octyl diphenylamine, acetone glycerol, benzotriazole, aliphatic amine and ethylene oxide condensate, the carbon deposit cleaning agent prepared in Example 6 and polyisobutylene bissuccinimide to obtain a functional additive;

[0075] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Example 10

[0076] An engine lubrication system cleaning oil comprises, by weight percentage, 75% of base oil and 25% of functional additives; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in a mass ratio of 1:1:1; the functional additives comprise, by weight, 3 parts of organic pentadecyl boron, 4 parts of high base synthetic calcium sulfonate, 0.7 parts of octyl diphenylamine, 10 parts of acetone glycerol, 0.3 parts of benzotriazole, 0.0003 parts of aliphatic amine and ethylene oxide condensate, 4 parts of carbon deposit cleaning agent prepared in Example 6 and 6 parts of polyisobutylene bissuccinimide.

[0077] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0078] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0079] (2) mixing organic pentadecyl boron, high base synthetic calcium sulfonate, octyl diphenylamine, acetone glycerol, benzotriazole, aliphatic amine and ethylene oxide condensate, the carbon deposit cleaning agent prepared in Example 6 and polyisobutylene bissuccinimide to obtain a functional additive;

[0080] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Embodiment 11

[0081] An engine lubrication system cleaning oil comprises, by weight percentage, 70% base oil and 30% functional additives; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in a mass ratio of 1:1:1; the functional additives comprise, by weight, 3 parts of oleic acid diethanolamide borate, 4 parts of overbased synthetic magnesium sulfonate, 0.7 parts of alkylated diphenylamine, 10 parts of dibasic acid ester, 0.3 parts of toluene triazole, 0.0003 parts of aliphatic amine and ethylene oxide condensate, 3 parts of carbon deposit cleaning agent prepared in Example 6 and 6 parts of dispersant boronated polyisobutylene succinimide.

[0082] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0083] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0084] (2) uniformly mixing oleic acid diethanolamide borate, superbased synthetic magnesium sulfonate, alkylated diphenylamine, dibasic acid ester, toluene triazole, fatty amine and ethylene oxide condensate, carbon deposit cleaning agent and boronated polyisobutylene succinimide to obtain a functional additive;

[0085] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Example 12

[0086] An engine lubrication system cleaning oil comprises, by weight percentage, 70% base oil and 30% functional additives; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in a mass ratio of 1:1:1; the functional additives comprise, by weight, 3 parts of oleic acid diethanolamide borate, 4 parts of overbased synthetic magnesium sulfonate, 0.7 parts of alkylated diphenylamine, 10 parts of dibasic acid ester, 0.3 parts of toluene triazole, 0.0003 parts of aliphatic amine and ethylene oxide condensate, 4 parts of carbon deposit cleaning agent prepared in Example 6 and 6 parts of dispersant boronated polyisobutylene succinimide.

[0087] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0088] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0089] (2) uniformly mixing oleic acid diethanolamide borate, superbased synthetic magnesium sulfonate, alkylated diphenylamine, dibasic acid ester, toluene triazole, fatty amine and ethylene oxide condensate, carbon deposit cleaning agent and boronated polyisobutylene succinimide to obtain a functional additive;

[0090] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Embodiment 13

[0091] An engine lubrication system cleaning oil comprises, by weight percentage, 70% base oil and 30% functional additives; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in a mass ratio of 1:1:1; the functional additives comprise, by weight, 3 parts of oleic acid diethanolamide borate, 4 parts of overbased synthetic magnesium sulfonate, 0.7 parts of alkylated diphenylamine, 10 parts of dibasic acid ester, 0.3 parts of toluene triazole, 0.0003 parts of aliphatic amine and ethylene oxide condensate, 5 parts of carbon deposit cleaning agent prepared in Example 6 and 6 parts of dispersant boronated polyisobutylene succinimide.

[0092] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0093] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0094] (2) uniformly mixing oleic acid diethanolamide borate, superbased synthetic magnesium sulfonate, alkylated diphenylamine, dibasic acid ester, toluene triazole, fatty amine and ethylene oxide condensate, carbon deposit cleaning agent and boronated polyisobutylene succinimide to obtain a functional additive;

[0095] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Embodiment 14

[0096] An engine lubrication system cleaning oil comprises, by weight percentage, 70% of a base oil and 30% of a functional additive; the base oil is a mixture of a 400N base oil, a 500N base oil and a 650N base oil in a mass ratio of 1:1:1; the functional additive comprises, by weight, 3 parts of organic pentadecyl boron, 4 parts of high base synthetic calcium sulfonate, 0.7 parts of octyl diphenylamine, 10 parts of glycerol acetone acetal, 0.3 parts of benzotriazole, 0.0003 parts of a condensate of a fatty amine and ethylene oxide, 4 parts of a carbon deposit cleaning agent prepared in Example 4 and 6 parts of polyisobutylene bissuccinimide.

[0097] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0098] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0099] (2) mixing organic pentadecyl boron, high base synthetic calcium sulfonate, octyl diphenylamine, acetone glycerol, benzotriazole, aliphatic amine and ethylene oxide condensate, the carbon deposit cleaning agent prepared in Example 4 and polyisobutylene bissuccinimide to obtain a functional additive;

[0100] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete. Embodiment 15

[0101] An engine lubrication system cleaning oil comprises, by weight percentage, 70% of a base oil and 30% of a functional additive; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in a mass ratio of 1:1:1; the functional additive comprises, by weight, 3 parts of organic pentadecyl boron, 4 parts of high base synthetic calcium sulfonate, 0.7 parts of octyl diphenylamine, 10 parts of acetone glycerol, 0.3 parts of benzotriazole, 0.0003 parts of a condensate of a fatty amine and ethylene oxide, 4 parts of a carbon deposit cleaning agent prepared in Example 5 and 6 parts of polyisobutylene bissuccinimide.

[0102] The preparation method of the above engine lubrication system cleaning oil is as follows:

[0103] (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil;

[0104] (2) mixing organic pentadecyl boron, high base synthetic calcium sulfonate, octyl diphenylamine, acetone glycerol, benzotriazole, aliphatic amine and ethylene oxide condensate, the carbon deposit cleaning agent prepared in Example 5 and polyisobutylene bissuccinimide to obtain a functional additive;

[0105] (3) Slowly add the functional additives into the base oil, control the temperature at 70°C, and stir while adding until the stirring is complete.

[0106] The engine lubrication system cleaning oil of the above embodiment is directly used as a lubricating oil with a cleaning effect. After rapid operation for 10-15 minutes, its carbon deposit removal rate is measured and calculated according to the following formula:

[0107] Carbon deposit removal rate (%) = (m2-m1) / (m3-m1)×100%

[0108] m1: initial mass of the component; m2: mass of the component after carbon deposits are attached; m3: mass of the component after the engine lubrication system is cleaned with oil;

[0109] The wear spot diameter was measured using SH / T 0189;

[0110] Full immersion corrosion test: Referring to the GJB 5974-2007 standard, 45# carbon steel was immersed in the above engine lubrication system cleaning oil for 7 days and its changes were observed. The results are shown in Table 2 below:

[0111] Table 2

[0112] Carbon deposit removal rate (%) <![CDATA[Wear scar diameter d 60 40 / mm]]> 45# Steel Corrosion Example 7 99.3 0.41 qualified Example 8 99.1 0.38 qualified Example 9 98.8 0.35 qualified Example 10 98.5 0.32 qualified Embodiment 11 98.1 0.33 qualified Example 12 98.9 0.33 qualified Embodiment 13 99.4 0.34 qualified Embodiment 14 98.6 0.32 qualified Embodiment 15 98.1 0.32 qualified

Claims

1. An engine lubrication system cleaning oil, characterized in that: Calculated by weight percentage, it comprises: 60-75% base oil and 25-40% functional additives; the base oil is a mixture of 400N base oil, 500N base oil and 650N base oil in any mass ratio; The functional additives include, by weight: 1 to 5 parts of organic boron lubricant, 2 to 5 parts of detergent dispersant, 0.3 to 1 part of antioxidant, 5 to 15 parts of auxiliary agent, 0.1 to 0.5 parts of rust inhibitor, 0.0001 to 0.0005 parts of fatty amine and ethylene oxide condensate, 3 to 5 parts of carbon deposit cleaning agent and 4 to 8 parts of dispersant; the detergent dispersant is one or more of high base synthetic calcium sulfonate, overbase synthetic magnesium sulfonate and sulfided alkyl phenol calcium; the dispersant is one or more of polyisobutylene bis succinimide, boronated polyisobutylene succinimide and polymer succinimide; The formula of the carbon deposit cleaning agent is as follows by weight percentage: 6% to 8% of alkylphenol polyoxyethylene ether, 4% to 6% of fatty alcohol polyoxyethylene ether, 1% to 2% of fatty alcohol polyoxyethylene ether sodium sulfate, 2% to 4% of sodium dodecylbenzene sulfonate, 3% to 5% of high heat dissipation ceramic particles, 0.8% of sodium carbonate, 1.5% of sodium silicate, 0.8% of sodium citrate, and the balance of water; The preparation method of the high heat dissipation ceramic particles is as follows: Step 1: Add 5-7 wt.% of calcium carbonate and 1.4 wt.% of calcium fluoride to aluminum nitride powder, and perform ball milling to obtain particles with a particle size of less than 2 μm; Step 2: under heating conditions, adding 22 wt.% paraffin wax and 0.3-0.7 wt.% oleic acid and stirring to obtain a slurry; Step 3: Pour into a hot die casting machine and form at a temperature of 60-80°C and a pressure of 0.6 MPa to obtain a green billet; Step 4: Debinding: The green blank is embedded with alumina powder calcined at 1400°C as an adsorbent, and the temperature is raised from room temperature to 300°C for debinding; Step 5: Transfer to a hot press furnace, sinter at 1750-1850°C for 3-5 h, and inject N2 as a protective atmosphere; Step 6: Take out, cool and then crush to obtain high heat dissipation ceramic particles with rough surface.

2. The engine lubrication system cleaning oil according to claim 1, characterized in that: The organic boron lubricant is one or more of pentadecyl boron, oleic acid diethanolamide borate and tall oil diethanolamide borate; the antioxidant is alkylated diphenylamine; and the auxiliary agent is one or more of glycerol acetone acetal and dibasic acid ester.

3. The engine lubrication system cleaning oil according to claim 1, characterized in that: The particle size of the high heat dissipation ceramic particles is 1 to 100 μm.

4. The engine lubrication system cleaning oil according to claim 1, characterized in that: The rust inhibitor is one or more of benzotriazole, toluenetriazole and thiadiazole derivatives.

5. The method for preparing the cleaning oil for the engine lubrication system according to any one of claims 1 to 4, characterized in that: The preparation method is as follows: (1) 400N base oil, 500N base oil and 650N base oil in any mass ratio are mixed and stirred uniformly to obtain base oil; (2) uniformly mixing an organic boron lubricant, a detergent dispersant, an antioxidant, an auxiliary agent, a rust inhibitor, a fatty amine and ethylene oxide condensate, a carbon deposit cleaning agent and a dispersant to obtain a functional additive; (3) Slowly add the functional additives into the base oil, control the temperature at 60-80°C, and stir while adding until the stirring is complete.