CN110373255B

CN110373255B - Wear-resistant fuel-saving engine lubricating oil and preparation method thereof

Info

Publication number: CN110373255B
Application number: CN201910573994.9A
Authority: CN
Inventors: 史旭军
Original assignee: Guangzhou Boseca Automobile Technology Co ltd
Current assignee: Guangzhou Boseca Automobile Technology Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2021-07-30
Anticipated expiration: 2039-06-28
Also published as: CN110373255A

Abstract

The invention belongs to the technical field of lubricating oil, and particularly relates to engine lubricating oil capable of preventing abrasion and saving fuel oil and a preparation method thereof. The invention provides wear-resistant fuel-saving engine lubricating oil which comprises the following components in parts by weight: 75-88 parts of base oil, 0.1-0.3 part of pour point depressant, 0.02-0.06 part of anti-foaming agent, 4-6 parts of composite additive, 1-2 parts of tackifier and 0.2-0.6 part of antioxidant corrosion inhibitor. The engine lubricating oil provided by the invention has excellent extreme pressure anti-wear performance, can reduce the wear amount of a piston ring of an engine, and prolong the service life of engine oil, thereby prolonging the oil change period of the engine oil when the engine oil is used on the engine, remarkably reducing the fuel consumption of the engine, effectively prolonging the service life of the engine, and having good energy-saving and emission-reducing effects.

Description

Wear-resistant fuel-saving engine lubricating oil and preparation method thereof

Technical Field

The invention belongs to the technical field of lubricating oil, and particularly relates to engine lubricating oil capable of preventing abrasion and saving fuel oil and a preparation method thereof.

Background

The engine lubricating oil, namely 'engine oil', is called as 'blood' of an automobile, can play roles in lubricating, cleaning, cooling, sealing, antifriction, rust prevention, corrosion prevention and the like for the engine, and influences the performance and the service life of the engine. Engine oils are oils that are added between two relatively moving surfaces to reduce friction and wear and include base oils such as mineral oils, synthetic oils, animal and vegetable oils, and aqueous fluids. The data describes that friction consumes more than 1/3 of world's disposable energy sources, and wear is one of 3 main forms of material and mechanical equipment failure, and lubrication is the most effective means to reduce friction, reduce or avoid wear. In China, the material loss caused by mechanical abrasion due to friction is as high as several billion yuan every year, so that the engine oil has wide application in various departments of national economy and is an indispensable chemical for the operation of any machine.

The Chinese patent application CN107955693A discloses a machine lubricating oil which is prepared from the following components in parts by weight: 70-90 parts of neutral base oil, 7-9 parts of phosphite ester, 2-4 parts of tackifier, 3-5 parts of sorbitol, 2-6 parts of silane coupling agent, 1-3 parts of oxidation and corrosion inhibitor, 4-7 parts of dichloromethane, 2-4 parts of ethylene oxide, 5-9 parts of fatty soap and 2-4 parts of modified polyurea. Although the machine lubricating oil can solve the problem of low viscosity index of the existing lubricating oil, the wear resistance and fuel saving effects on an engine are not ideal.

As a blood of the automobile industry, engine lubricating oil has been advanced along with the development of the automobile industry, and is continuously upgraded. At present, the existing engine lubricating oil has the problems of poor performances such as wear resistance, fuel saving and the like, so that the development of the energy-saving engine lubricating oil with excellent wear resistance is urgent.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide the engine lubricating oil capable of preventing abrasion and saving fuel oil and the preparation method thereof. The engine lubricating oil provided by the invention has excellent extreme pressure anti-wear performance, can reduce the wear amount of a piston ring of an engine, and prolong the service life of engine oil, thereby prolonging the oil change period of the engine oil when the engine oil is used on the engine, remarkably reducing the fuel consumption of the engine, effectively prolonging the service life of the engine, and having good energy-saving and emission-reducing effects.

The technical scheme of the invention is as follows:

an anti-abrasion fuel-saving engine lubricating oil comprises the following components in parts by weight: 75-88 parts of base oil, 0.1-0.3 part of pour point depressant, 0.02-0.06 part of anti-foaming agent, 4-6 parts of composite additive, 1-2 parts of tackifier and 0.2-0.6 part of antioxidant corrosion inhibitor.

Further, the anti-abrasion and fuel-saving engine lubricating oil comprises the following components in parts by weight: 85 parts of base oil, 0.2 part of pour point depressant, 0.03 part of anti-foaming agent, 5 parts of composite additive, 1.4 parts of tackifier and 0.3 part of antioxidant and corrosion inhibitor.

Further, the base oil is 500SN base oil.

Further, the pour point depressant is one or a combination of a polymethacrylate pour point depressant, a fumarate pour point depressant and a polyalphaolefin pour point depressant.

Further, the anti-foaming agent is dimethyl silicone oil.

Further, the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to the mass ratio of 6-9:2-4: 1-2.

Further, the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to a mass ratio of 7:3: 2.

Further, the antioxidant and corrosion inhibitor is zinc dialkyl dithiophosphate with secondary alcohol groups.

Further, the composite additive is prepared from the following components in parts by mass: 8-12 parts of nano zinc molybdate, 20-25 parts of nano sepiolite, 3-5 parts of nano silicon dioxide, 4-6 parts of an adhesive, 3-5 parts of oleic acid, 1-2 parts of lecithin and 150 parts of deionized water.

Further, the composite additive is prepared from the following components in parts by mass: 9 parts of nano zinc molybdate, 23 parts of nano sepiolite, 4 parts of nano silicon dioxide, 5 parts of an adhesive, 4 parts of oleic acid, 1 part of lecithin and 130 parts of deionized water.

Further, the adhesive is composed of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum according to the mass ratio of 12-16:4-7: 1-2.

Further, the adhesive is composed of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum according to a mass ratio of 15:6: 1.

Further, the preparation method of the composite additive comprises the following steps:

(1) adding oleic acid and lecithin into half amount of deionized water, stirring uniformly to obtain a material A, adding nano silicon dioxide into the material A, stirring uniformly, and adjusting the pH to 8-9 to obtain a material B;

(2) taking the rest amount of deionized water, adding an adhesive, heating to 65-75 ℃, stirring at constant temperature for 30-50min, adding nano zinc molybdate and nano sepiolite, and stirring uniformly to obtain a material C;

(3) mixing the material B obtained in the step (1) and the material C obtained in the step (2), stirring for 2-5h, and then drying while stirring to obtain a solid;

(4) and (4) preserving the heat of the solid obtained in the step (3) at the temperature of 600-.

In addition, the invention also provides a preparation method of the engine lubricating oil with abrasion resistance and fuel saving, which comprises the following steps:

placing the base oil in a blending kettle, stirring for 1h at 60-80 ℃, adding the tackifier, continuing to stir for 2h at 60-80 ℃, then sequentially adding the antioxidant corrosion inhibitor, the pour point depressant, the composite additive and the antifoaming agent, wherein the interval time for adding each raw material is 20min, continuing to stir for 1h at 60-80 ℃ after all the raw materials are added, cooling to normal temperature, filtering and subpackaging to obtain the modified vegetable oil.

In the invention, the composite additive prepared from the raw materials of nano zinc molybdate, nano sepiolite, nano silicon dioxide, an adhesive, oleic acid, lecithin and the like has good oil solubility and can be dispersed in lubricating oil very stably; the material has high surface activity, is beneficial to the adhesion of the material on a friction surface, generates physical and chemical reactions with the friction surface, and has good self-repairing, friction-reducing and wear-resisting effects; in addition, the composite additive provided by the invention can form a protective layer with extremely high compressive strength and wear resistance on the metal surface of an engine, can greatly improve the lubricating property of the mutual friction surface, greatly reduce the friction coefficient, obviously improve the lubricating effect, further improve the effective power of mechanical equipment, prolong the service life of the mechanical equipment and reduce the operation energy consumption of the mechanical equipment.

The tackifier consisting of the rice bran oil, the ethylene-propylene copolymer and the polyisobutylene according to a certain mass ratio has good lubricating property, not only can play a role in tackifying, but also can generate strong adsorption force on the surface of metal, so that the thickness and the strength of an oil film are improved, the extreme pressure anti-wear property of lubricating oil is enhanced, and the lubricating condition of a friction surface is improved.

Compared with the prior art, the invention has the following advantages:

(1) the engine lubricating oil capable of preventing abrasion and saving fuel oil provided by the invention has excellent extreme pressure anti-wear performance, can reduce the abrasion loss of engine piston rings, and can prolong the service life of engine oil, thereby prolonging the oil change period of the engine oil when the engine oil is used on an engine.

(2) The engine lubricating oil capable of preventing abrasion and saving fuel provided by the invention can obviously reduce the fuel consumption of an engine, can effectively prolong the service life of the engine and has good energy-saving and emission-reducing effects.

(3) The engine lubricating oil provided by the invention has excellent performance and good stability.

Detailed Description

The present invention is further described in the following description of the specific embodiments, which is not intended to limit the invention, but various modifications and improvements can be made by those skilled in the art according to the basic idea of the invention, within the scope of the invention, as long as they do not depart from the basic idea of the invention.

In the invention, the 500SN base oil can be purchased from Guangdong Henan union energy Co., Ltd, the cargo number 100# and the specification and model number 500 SN; polymethacrylate pour point depressants are available from the chemical technology ltd, santa acuminata, guangzhou, cat No. 60002, model T602 HB; the simethicone can be purchased from Guangzhou Anchen chemical technology Co., Ltd, the product number 022, the model number PMX-200; secondary alcohol based zinc dialkyldithiophosphates are available from Shanghai German chemical Limited under model number T205; the nano zinc molybdate can be purchased from Australia nano materials technology Co., Ltd in Hubei, and has the granularity of 50 nm; the nano sepiolite can be purchased from Guangdong new material (Guangzhou) Co., Ltd, 3000 meshes; rice bran oil is available from guangzhou lin trade ltd, cat # 07821; ethylene-propylene copolymers are available from Shanghai Nassan chemical Co., Ltd, cat # T613; the polyisobutylene can be purchased from Guangzhou Donghong chemical Co., Ltd, Cat number PB 2400; the nano silicon dioxide can be purchased from Guangdong new materials (Guangzhou) Co., Ltd, 5000 meshes; sodium carboxymethylcellulose is available from Guangzhou Jingfu bioengineering, Inc., cat # 101; polyvinylpyrrolidone is available from Guangdong Yueembellishment, Inc. under model number PVPK 30; xanthan gum is available from Kyoho Biotechnology Co., Ltd, Cat. No. 18-01-26; lecithin is available from Shanghai Yokogao industries, Inc., cat # YC 0025; the fumarate pour point depressant is available from Shenyang great wall lubricating oil manufacturing, Inc., model No. T808A; polyalphaolefin pour point depressants are available from Runda chemical, Inc., of Jinzhou, model T803B.

Embodiment 1, an engine lubricating oil capable of preventing wear and saving fuel oil, the engine lubricating oil capable of preventing wear and saving fuel oil comprises the following components in parts by weight: 75 parts of base oil, 0.1 part of pour point depressant, 0.02 part of anti-foaming agent, 4 parts of composite additive, 1 part of tackifier and 0.2 part of antioxidant corrosion inhibitor; the base oil is 500SN base oil; the pour point depressant is a polymethacrylate pour point depressant; the anti-foaming agent is dimethyl silicone oil; the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to the mass ratio of 6:4: 2; the antioxidant corrosion inhibitor is zinc dialkyl dithiophosphate with secondary alcohol groups.

The composite additive is prepared from the following components in parts by mass: 8 parts of nano zinc molybdate, 20 parts of nano sepiolite, 3 parts of nano silicon dioxide, 4 parts of an adhesive, 3 parts of oleic acid, 1 part of lecithin and 120 parts of deionized water; the adhesive is composed of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum according to a mass ratio of 12:7: 2.

The preparation method of the composite additive comprises the following steps:

(1) adding oleic acid and lecithin into half amount of deionized water, uniformly stirring to obtain a material A, adding nano silicon dioxide into the material A, uniformly stirring, and adjusting the pH value to 8 to obtain a material B;

(2) taking the rest amount of deionized water, adding an adhesive, heating to 65 ℃, stirring at constant temperature for 30min, adding nano zinc molybdate and nano sepiolite, and stirring uniformly to obtain a material C;

(3) mixing the material B obtained in the step (1) and the material C obtained in the step (2), stirring for 2 hours, and then drying while stirring to obtain a solid;

(4) and (4) preserving the heat of the solid obtained in the step (3) at 600 ℃ for 2h, cooling to room temperature, and grinding to obtain the product.

The preparation method of the engine lubricating oil capable of preventing abrasion and saving fuel oil comprises the following steps:

placing the base oil in a blending kettle, stirring for 1h at 60 ℃, adding the tackifier, continuing to stir for 2h at 60 ℃, then sequentially adding the antioxidant corrosion inhibitor, the pour point depressant, the composite additive and the antifoaming agent, adding each raw material at an interval of 20min, continuing to stir for 1h at 60 ℃ after all the raw materials are added, cooling to normal temperature, filtering and subpackaging to obtain the modified vegetable oil.

Embodiment 2, an engine lubricating oil capable of preventing wear and saving fuel oil the engine lubricating oil capable of preventing wear and saving fuel oil comprises the following components in parts by mass: 88 parts of base oil, 0.3 part of pour point depressant, 0.06 part of anti-foaming agent, 6 parts of composite additive, 2 parts of tackifier and 0.6 part of antioxidant corrosion inhibitor; the base oil is 500SN base oil; the pour point depressant consists of a polymethacrylate pour point depressant and a fumarate pour point depressant according to the mass ratio of 5: 1; the anti-foaming agent is dimethyl silicone oil; the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to a mass ratio of 9:2: 1; the antioxidant corrosion inhibitor is zinc dialkyl dithiophosphate with secondary alcohol groups.

The composite additive is prepared from the following components in parts by mass: 12 parts of nano zinc molybdate, 25 parts of nano sepiolite, 5 parts of nano silicon dioxide, 6 parts of an adhesive, 5 parts of oleic acid, 2 parts of lecithin and 150 parts of deionized water; the adhesive is composed of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum according to a mass ratio of 16:4: 1.

The preparation method of the composite additive comprises the following steps:

(1) adding oleic acid and lecithin into half amount of deionized water, uniformly stirring to obtain a material A, adding nano silicon dioxide into the material A, uniformly stirring, and adjusting the pH to 9 to obtain a material B;

(2) taking the rest amount of deionized water, adding an adhesive, heating to 75 ℃, stirring at constant temperature for 50min, adding nano zinc molybdate and nano sepiolite, and stirring uniformly to obtain a material C;

(3) mixing the material B obtained in the step (1) and the material C obtained in the step (2), stirring for 5 hours, and then drying while stirring to obtain a solid;

(4) and (4) preserving the heat of the solid obtained in the step (3) at 800 ℃ for 2h, cooling to room temperature, and grinding to obtain the product.

placing the base oil in a blending kettle, stirring for 1h at 80 ℃, adding the tackifier, continuing to stir for 2h at 80 ℃, then sequentially adding the antioxidant corrosion inhibitor, the pour point depressant, the composite additive and the antifoaming agent, adding each raw material at an interval of 20min, continuing to stir for 1h at 80 ℃ after all the raw materials are added, cooling to normal temperature, filtering and subpackaging to obtain the modified vegetable oil.

Embodiment 3, an engine lubricating oil capable of preventing wear and saving fuel, the engine lubricating oil capable of preventing wear and saving fuel comprises the following components in parts by weight: 85 parts of base oil, 0.2 part of pour point depressant, 0.03 part of anti-foaming agent, 5 parts of composite additive, 1.4 parts of tackifier and 0.3 part of antioxidant corrosion inhibitor; the base oil is 500SN base oil; the pour point depressant consists of a polymethacrylate pour point depressant, a fumarate pour point depressant and a polyalphaolefin pour point depressant according to the mass ratio of 1:6: 9; the anti-foaming agent is dimethyl silicone oil; the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to the mass ratio of 7:3: 2; the antioxidant corrosion inhibitor is zinc dialkyl dithiophosphate with secondary alcohol groups.

The composite additive is prepared from the following components in parts by mass: 9 parts of nano zinc molybdate, 23 parts of nano sepiolite, 4 parts of nano silicon dioxide, 5 parts of an adhesive, 4 parts of oleic acid, 1 part of lecithin and 130 parts of deionized water; the adhesive is composed of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum according to a mass ratio of 15:6: 1.

The preparation method of the composite additive comprises the following steps:

(1) adding oleic acid and lecithin into half amount of deionized water, uniformly stirring to obtain a material A, adding nano silicon dioxide into the material A, uniformly stirring, and adjusting the pH to 8.5 to obtain a material B;

(2) taking the rest amount of deionized water, adding an adhesive, heating to 70 ℃, stirring at constant temperature for 40min, adding nano zinc molybdate and nano sepiolite, and stirring uniformly to obtain a material C;

(3) mixing the material B obtained in the step (1) and the material C obtained in the step (2), stirring for 3 hours, and then drying while stirring to obtain a solid;

(4) and (4) preserving the heat of the solid obtained in the step (3) at 700 ℃ for 2h, cooling to room temperature, and grinding to obtain the product.

placing the base oil in a blending kettle, stirring for 1h at 70 ℃, adding the tackifier, continuing to stir for 2h at 70 ℃, then sequentially adding the antioxidant corrosion inhibitor, the pour point depressant, the composite additive and the antifoaming agent, adding each raw material at an interval of 20min, continuing to stir for 1h at 70 ℃ after all the raw materials are added, cooling to normal temperature, filtering and subpackaging to obtain the modified vegetable oil.

Comparative example 1, an engine lubricating oil the engine lubricating oil comprises the following components in parts by mass: 85 parts of base oil, 0.2 part of pour point depressant, 0.03 part of anti-foaming agent, 5 parts of composite additive, 1.4 parts of tackifier and 0.3 part of antioxidant corrosion inhibitor; the base oil is 500SN base oil; the pour point depressant consists of a polymethacrylate pour point depressant, a fumarate pour point depressant and a polyalphaolefin pour point depressant according to the mass ratio of 1:6: 9; the anti-foaming agent is dimethyl silicone oil; the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to the mass ratio of 1:1: 1; the antioxidant corrosion inhibitor is zinc dialkyl dithiophosphate with secondary alcohol groups.

The preparation method of the composite additive and the engine lubricating oil is similar to that of the embodiment 3.

Similar to example 3, the difference is that the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene in a mass ratio of 1:1: 1.

Comparative example 2, an engine lubricating oil the engine lubricating oil comprises the following components in parts by mass: 85 parts of base oil, 0.2 part of pour point depressant, 0.03 part of anti-foaming agent, 5 parts of composite additive, 1.4 parts of tackifier and 0.3 part of antioxidant corrosion inhibitor; the base oil is 500SN base oil; the pour point depressant consists of a polymethacrylate pour point depressant, a fumarate pour point depressant and a polyalphaolefin pour point depressant according to the mass ratio of 1:6: 9; the anti-foaming agent is dimethyl silicone oil; the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to the mass ratio of 7:3: 2; the antioxidant corrosion inhibitor is zinc dialkyl dithiophosphate with secondary alcohol groups.

The composite additive is prepared from the following components in parts by mass: 9 parts of nano zinc molybdate, 23 parts of nano sepiolite, 4 parts of nano silicon dioxide, 5 parts of an adhesive, 4 parts of oleic acid, 1 part of lecithin and 130 parts of deionized water; the adhesive is composed of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum according to the mass ratio of 1:1: 1.

Similar to example 3, except that the binder consists of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum in a mass ratio of 1:1: 1.

Comparative example 3, an engine lubricating oil the engine lubricating oil comprises the following components in parts by mass: 85 parts of base oil, 0.2 part of pour point depressant, 0.03 part of anti-foaming agent, 5 parts of composite additive, 1.4 parts of tackifier and 0.3 part of antioxidant corrosion inhibitor; the base oil is 500SN base oil; the pour point depressant consists of a polymethacrylate pour point depressant, a fumarate pour point depressant and a polyalphaolefin pour point depressant according to the mass ratio of 1:6: 9; the anti-foaming agent is dimethyl silicone oil; the tackifier consists of rice bran oil, an ethylene-propylene copolymer and polyisobutylene according to the mass ratio of 7:3: 2; the antioxidant corrosion inhibitor is zinc dialkyl dithiophosphate with secondary alcohol groups.

The composite additive comprises the following components in parts by weight: 9 parts of nano zinc molybdate, 23 parts of nano sepiolite and 4 parts of nano silicon dioxide.

Similar difference to example 3 is that the composite additive is composed of the following components in parts by weight: 9 parts of nano zinc molybdate, 23 parts of nano sepiolite and 4 parts of nano silicon dioxide.

Test example I, abrasion resistance and antifriction Properties

1. Test materials: the engine lubricating oils prepared in example 1, example 2, example 3, comparative example 2 and comparative example 3.

2. The test method comprises the following steps:

in the four-ball friction machine experiment, under the conditions of normal temperature, load of 392N and 500r/min, the diameter of the grinding spot and the average friction coefficient are obtained after the experiment is carried out for 30 min.

3. The test results are shown in table 1.

Table 1: results of testing wear resistance and friction reduction performance

As can be seen from table 1, after the four-ball friction machine experiment, the wear-resistant and fuel-saving engine lubricating oil prepared by the invention has smaller wear-resistant spot diameter and average friction coefficient, which indicates that the engine lubricating oil of the invention has good wear-resistant and friction-reducing performances, wherein the best wear-resistant and friction-reducing performance of the embodiment 3 is the best embodiment of the invention; compared with comparative examples 2-3, the engine lubricating oil of the invention has more excellent wear resistance and antifriction performance.

Test example two, bench simulation test of engine

1. Test materials: the engine lubricating oils prepared in example 3, comparative example 1, comparative example 2, and comparative example 3.

2. The test method comprises the following steps:

(1) before an engine simulation bench experiment, testing various tribological properties (oil film strength, sintering load, wear scar diameter and average friction coefficient) of engine lubricating oil to be tested on a four-ball friction machine, then loading the engine lubricating oil to be tested into the engine, carrying out no-load running for 1 hour to clean the interior of the engine, then discharging the engine lubricating oil, disassembling an engine cylinder cover, a cylinder body and a piston, cleaning the piston ring by using petroleum ether, and testing the weight of the piston ring before the experiment on an analytical balance after drying;

(2) when an engine simulates a bench test, new engine lubricating oil to be tested is filled in the engine, the bench is opened, and the oil consumption per hundred kilometers of the idle running of the engine under a certain load is tested (the oil consumption is obtained by measuring the reduction of gasoline in an oil bottle when the engine runs for 10 hours under a certain load);

(3) after an engine simulation bench experiment, taking out engine lubricating oil and a piston ring, testing various tribological properties (oil film strength, sintering load, wear scar diameter and average friction coefficient) of the engine lubricating oil on a four-ball friction machine, cleaning the piston ring with petroleum ether, drying, testing the weight of the piston ring after the experiment on an analytical balance, and calculating the abrasion loss of the piston ring in the bench experiment. Finally, the new cylinder body, the piston and the piston ring are replaced, the engine is assembled, and the next group of engine oil is tested, wherein the process is the same as the above process.

3. The test results are shown in tables 2 and 3.

Table 2: comparison of tribological performance parameter changes before and after engine simulation bench test

As can be seen from Table 2, before the engine simulation bench test, the engine lubricating oil prepared by the invention has higher oil film strength, higher sintering load and lower wear-resisting spot diameter, which shows that the engine lubricating oil has excellent extreme pressure anti-wear performance, and compared with comparative examples 1-3, the engine lubricating oil has better extreme pressure anti-wear performance. Compared with comparative examples 1-3, after the engine simulation bench experiment, the engine lubricating oil prepared by the invention has the advantages of less oil film strength, smaller wear-resistant and fuel-saving wear-resistant and wear-resistant diameter, smaller reduction amplitude and smaller change of average friction coefficient. Therefore, the engine lubricating oil prepared by the invention can prolong the service life of the engine oil, thereby prolonging the oil change period of the engine oil when the engine oil is used on an engine.

Table 3: comparison of piston ring wear in engine simulation bench test

Item	Example 3	Comparative example 1	Comparative example 2	Comparative example 3
					Wear of gas ring (mg)	4.76	5.63	5.34	6.25
Oil Ring abrasion loss (mg)	1.45	1.94	1.72	2.18
					In total (mg)	6.21	7.57	7.06	8.43

As can be seen from Table 3, the engine lubricating oil produced by the present invention can reduce the amount of wear of the piston rings of the engine as compared with comparative examples 1 to 3, and therefore, the engine lubricating oil produced by the present invention can improve the internal lubrication of the engine and prolong the service life of the engine.

Test example three, traveling test

2. The test method comprises the following steps:

the common lubricating oil, the engine lubricating oil prepared in example 1, the engine lubricating oil prepared in example 2, the engine lubricating oil prepared in example 3, the engine lubricating oil prepared in comparative example 2 and the engine lubricating oil prepared in comparative example 3 are respectively used on automobiles of the same type and the same manufacturer to test the oil consumption in the driving experiment. The fuel consumption after driving for a certain distance at the speed of 70km/h on a specified road section (no traffic light, few driving vehicles and flat surface).

3. And (3) test results:

the test results are shown in table 4.

Table 4: fuel consumption comparison in Driving experiments

As can be seen from Table 4, the engine lubricating oil prepared by the present invention has lower fuel consumption per hundred kilometers than the conventional lubricating oil and comparative examples 2 to 3, wherein the fuel consumption per hundred kilometers in example 3 is the lowest and the fuel saving rate is the highest, and is the best example of the present invention. Therefore, the engine lubricating oil can obviously reduce the fuel consumption of the engine.

Claims

1. The engine lubricating oil capable of preventing abrasion and saving fuel oil is characterized by comprising the following components in parts by weight: 75-88 parts of base oil, 0.1-0.3 part of pour point depressant, 0.02-0.06 part of anti-foaming agent, 4-6 parts of composite additive, 1-2 parts of tackifier and 0.2-0.6 part of antioxidant corrosion inhibitor; the composite additive is prepared from the following components in parts by mass: 8-12 parts of nano zinc molybdate, 20-25 parts of nano sepiolite, 3-5 parts of nano silicon dioxide, 4-6 parts of an adhesive, 3-5 parts of oleic acid, 1-2 parts of lecithin and 150 parts of deionized water; the adhesive is composed of sodium carboxymethylcellulose, polyvinylpyrrolidone and xanthan gum according to a mass ratio of 12-16:4-7: 1-2.

2. The wear-resistant fuel-efficient engine lubricating oil of claim 1, comprising the following components in parts by weight: 85 parts of base oil, 0.2 part of pour point depressant, 0.03 part of anti-foaming agent, 5 parts of composite additive, 1.4 parts of tackifier and 0.3 part of antioxidant and corrosion inhibitor.

3. The wear-resistant, fuel-efficient engine lubricating oil of claim 1 or 2, wherein the base oil is a 500SN base oil.

4. The wear-resistant, fuel-efficient engine lubricating oil of claim 1 or 2, wherein the pour point depressant is one or a combination of a polymethacrylate pour point depressant, a fumarate pour point depressant, and a polyalphaolefin pour point depressant.

5. The wear-resistant, fuel-efficient engine lubricating oil of claim 1 or 2, wherein the tackifier is comprised of rice bran oil, an ethylene-propylene copolymer, and polyisobutylene in a mass ratio of 6-9:2-4: 1-2.

6. The wear-resistant fuel-efficient engine lubricating oil of claim 1, wherein the composite additive is prepared from the following components in parts by weight: 9 parts of nano zinc molybdate, 23 parts of nano sepiolite, 4 parts of nano silicon dioxide, 5 parts of an adhesive, 4 parts of oleic acid, 1 part of lecithin and 130 parts of deionized water.

7. The wear-resistant, fuel-efficient engine lubricating oil of claim 1, wherein the binder is comprised of sodium carboxymethylcellulose, polyvinylpyrrolidone, and xanthan gum in a mass ratio of 15:6: 1.

8. The method of preparing a wear resistant, fuel efficient engine lubricating oil according to any of claims 1-7, comprising the steps of: