CN115141673B

CN115141673B - Lubricating oil composition with high cleaning and self-cooling capacity suitable for automobile engine

Info

Publication number: CN115141673B
Application number: CN202210791419.8A
Authority: CN
Inventors: 兰建军; 夏昉
Original assignee: Hangzhou Xiaozhi Automobile Technology Service Co ltd
Current assignee: Hangzhou Xiaozhi Automobile Technology Service Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2023-09-22
Anticipated expiration: 2042-07-07
Also published as: CN115141673A

Abstract

The application belongs to the technical field of new lubricating oil materials. A lubricating oil composition with high cleaning and self-cooling capacity suitable for an automobile engine comprises the following components in percentage by weight: 0.5-3% of cooling additive, 8-15% of friction modifier, 2-4.5% of cleaning agent, 2-10% of one or more other lubricant additive components selected from defoamer, viscosity index improver and high-temperature antioxidant, and the balance of base oil; the friction modifier is fluorinated graphene. Because the lubricating oil composition is added with the cooling additive, the working temperature of an automobile engine in the running process of the automobile can be obviously reduced, and the running performance of the automobile is improved. Meanwhile, the engine lubricating oil adopted by the application adopts the friction improver containing the fluorinated graphene and the cleaning agent, so that the abrasion proportion caused by friction in an engine system can be obviously reduced, and meanwhile, the cleaning agent can keep the interior of the engine clean.

Description

Lubricating oil composition with high cleaning and self-cooling capacity suitable for automobile engine

Technical Field

The application belongs to the technical field of lubricating oil, and particularly relates to a lubricating oil composition with high cleaning and self-cooling capacities suitable for an automobile engine.

Background

The engine is a heart of an automobile, a plurality of metal surfaces in the engine move in a friction way, the parts move at a high speed and have poor environment, and the working temperature can reach 400-600 ℃ generally. The working environment of the engine is extremely severe, the temperature of the combustion chamber can reach 2000 ℃ in some cases, and the temperature of lubricating oil at the piston rings is also above 200 ℃. The maximum rotating speed of the engine crankshaft can reach 5000-6000 r/min, and the lubricating oil at the bearing position is sheared greatly. The engine air distribution system has strong sliding friction, if the abrasion exceeds the standard, the engine power is reduced, even the air valve is burnt, the engine load is in a state of frequent change due to frequent starting and stopping of the vehicle, and the oil sludge and carbon deposit are easy to generate. The difference of the external environment temperature can reach 70 ℃ according to different seasons, and the engine is required to have stable and reliable performance no matter cold start and long-time running. During vehicle operation, external dust particles and moisture enter the engine through the air intake system, which can create significant abrasive wear on the components.

In order to reduce the abrasion between the friction pairs moving relatively due to contact friction, it is generally necessary to add lubricating oil to impart good lubrication to the friction portions, and when the lubricating oil flows to the friction portions, an oil film is formed on the friction surfaces, thereby reducing the friction force between the friction members. For mechanical devices, the working efficiency can be improved and the power loss can be reduced by adding lubricating oil, but for engines, it is not enough to solve the lubrication problem only because:

1. when the engine works, dust sucked from air and metal crushed shoulders generated by friction of the machine parts are difficult to discharge after combustion, dirt is easy to form and is adsorbed on the inner wall, abrasion is increased, and normal operation of the engine is affected.

2. In the combustion process of the fuel, unsaturated olefin and colloid in the fuel are easy to adhere to the air inlet valve and the combustion chamber wall, and are thicker as the fuel is accumulated, and carbon deposition is formed after repeated heating; because the carbon deposition structure is similar to a sponge, a part of fuel injected into the cylinder at each time is adsorbed by the carbon deposition, so that the concentration of the mixed gas actually pressed into the cylinder becomes thin, the engine works poorly, and abnormal phenomena such as difficult starting, unstable idling, poor acceleration, rapid oiling tempering, excessive tail gas, increased oil consumption and the like occur.

3. Under the catalysis of high-temperature combustion and various mediums and metals, the lubricating oil is easy to generate oil sludge to block an oil way, so that the oil way is unsmooth, and the engine is tired and soft in power, so that the engine is loud in noise and vibration, and the normal operation of the engine is influenced.

It can be seen that if the dirt such as carbon deposit, oil sludge and the like is not cleaned in time, the normal operation of the generator is affected; the general cleaning is to remove the harmful substances by replacing engine oil periodically and then cleaning the engine oil by other special engine cleaning oil so as to ensure the safety of the vehicle. However, the cost of replacing engine oil and cleaning the engine is high at regular intervals, and although the conventional lubricating oil has a certain cleaning function, the cleaning performance is poor, and the cleaning cannot be effectively performed.

Meanwhile, the existing automobile engine lubricating oil has no obvious cooling function when the engine operates, the internal working environment temperature is very high, the operating efficiency of each part is reduced, and the normal operation of each part is obviously influenced.

Disclosure of Invention

The present application has been made in view of the above problems, and an object of the present application is to provide a lubricating oil composition having high cleaning and self-cooling ability suitable for an automobile engine, which is capable of cooling a transmission while cleaning the automobile engine and ensuring efficient operation of each component.

In order to achieve the above object, the present application adopts the following method:

a lubricating oil composition with high cleaning and self-cooling capacity suitable for an automobile engine comprises the following components in percentage by weight: 0.5-3% of cooling additive, 8-15% of friction modifier, 2-4.5% of cleaning agent, 2-10% of one or more other lubricant additive components selected from defoamer, viscosity index improver and high-temperature antioxidant, and the balance of base oil; the cooling additive is disodium hydrogen phosphate dodecahydrate, the cleaning agent is at least one of a phenol calcium salt cleaning agent, a calcium sulfonate cleaning agent or a salicylic acid calcium salt cleaning agent, the friction improver is fluorinated graphene, the fluorinated graphene is obtained by adopting a liquid phase stripping method, the lubricating oil composition can enable the internal temperature of an automobile engine to be reduced by 14.3-20.1%, and the reduction percentage of carbon deposition and oil sludge in a system reaches 69.2-90.1%.

The base oil is at least one of III-type hydrogenated base oil and poly alpha-olefin base oil.

The application has the following beneficial effects:

according to the application, the friction improver containing the fluorinated graphene and the cleaning agent are adopted for the engine lubricating oil, so that the abrasion ratio caused by friction in an engine system can be remarkably reduced, meanwhile, the cleaning agent can keep the interior of the engine clean, so that the generated insoluble substances are in a colloid suspension state, carbon deposit, paint film or oil sludge are not further formed, and the paint film and the carbon deposit which are adsorbed on the surfaces of the components can be washed and dispersed in oil, so that the engine and the metal surfaces can be kept clean.

Meanwhile, the lubricating oil composition suitable for the automobile engine is added with the cooling additive, so that the working temperature of the automobile engine in the running process of the automobile can be obviously reduced, and the running performance of the automobile is improved. Therefore, the lubricating oil composition of the present application can ensure that the engine is operated at a proper temperature value, and significantly improve the operation efficiency of each operating member.

When the automobile engine works, the carbon deposit is mainly generated because the carbon deposit covers high-temperature areas such as a cylinder cover, a spark plug, an oil sprayer, a piston top and the like, and solid carbon-shaped objects with larger thickness are formed. It is the deposition of substances such as smoke decomposed at high temperature on high temperature parts, which is the incomplete combustion or the engine oil is strung into the combustion chamber. Thus, the use of a cooling additive also reduces the occurrence of carbon deposits, while the amount of detergent required is reduced, i.e. the engine cleanliness will be higher with the same amount of detergent.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Detailed Description

The described embodiments of the application are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

A lubricating oil composition with high cleaning and self-cooling capacity suitable for an automobile engine comprises the following components in percentage by weight: 0.5-3% of cooling additive, 8-15% of friction modifier, 2-4.5% of cleaning agent, 2-10% of one or more other lubricant additive components selected from defoamer, viscosity index improver and high-temperature antioxidant, and the balance of base oil; the friction modifier is fluorinated graphene, and the fluorinated graphene is obtained by adopting a liquid phase stripping method. The liquid phase stripping method for obtaining the fluorinated graphene has two main outstanding advantages that the commercial fluorinated graphite raw material is adopted to replace the expensive graphene, and the method has simple and convenient requirements on technical equipment (most of the method is only needed by an ultrasonic cleaner), so that the method is easier for mass production.

Example 1:

the lubricating oil compositions for automobile engines in this example were formulated from the components in weight percent in table 1, and the performance index data are shown in table 5.

TABLE 1 raw material components and weight percentage of example 1

Example 2:

the lubricating oil compositions for automobile engines in this example were formulated from the components in weight percent in Table 2, and the performance index data are shown in Table 5.

TABLE 2 raw material components and weight percentage of example 2

Example 3:

the lubricating oil compositions for automobile engines in this example were formulated from the components in weight percent in Table 3, and the performance index data are shown in Table 5.

TABLE 3 raw material components and weight percentage of example 3

Example 4:

the lubricating oil compositions for automobile engines in this example were formulated from the components in weight percent in Table 4, and the performance index data are shown in Table 5.

TABLE 4 raw material components and weight percentage of example 4

Since the present application mainly researches the wear cleaning ability and self-cooling ability of lubricating oil, the experimental data of the following table 5 mainly discloses four indexes of the percentage decrease of the wear coefficient, the percentage decrease of the wear proportion, the percentage decrease of the carbon deposition and sludge amount in the engine and the percentage decrease of the internal temperature of the engine.

TABLE 5 Performance index data for lubricating oils of various examples

Comparison	Percent decrease in wear coefficient	Percentage decrease in wear proportion	Percent reduction in carbon deposition and sludge in an engine	Percent reduction in engine internal temperature
					Example 1	48.1	88.2	76.8	15.1
Example 2	52	92	88.9	19.2
					Example 3	46.3	85.7	69.2	14.3
Example 4	52.1	92.3	90.1	20.1

As can be seen from the data in Table 5, the lubricating oil of the formula can reduce the internal temperature of an automobile engine by about 20% due to the addition of the cooling additive, which is beneficial to the improvement of the working efficiency of each component, the reduction of the carbon deposition and the sludge in the engine and the reduction of the carbon deposition and the sludge in the system by about 90% due to the action of the cleaning agent, and basically achieves the effect of cleaning the engine. Meanwhile, the fluorinated graphene can reduce abrasion of the system, and also can reduce the generation of working garbage, so that the cleaning pressure of the system is reduced.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application.

Claims

1. A lubricating oil composition with high cleaning and self-cooling capacity suitable for an automobile engine comprises the following components in percentage by weight:

0.5 to 3 percent of cooling additive,

8-15% of friction modifier,

2 to 4.5 percent of cleaning agent,

2-10% of one or more other lubricant additives selected from defoamers, viscosity index improvers, high temperature antioxidants,

the balance being base oil;

the method is characterized in that:

the cooling additive is disodium hydrogen phosphate dodecahydrate;

the cleaning agent is at least one of a phenol calcium salt cleaning agent, a calcium sulfonate cleaning agent or a calcium salicylate cleaning agent;

the friction modifier is fluorinated graphene which is obtained by adopting a liquid phase stripping method,

the lubricating oil composition can reduce the internal temperature of an automobile engine by 14.3-20.1%, and the reduction percentage of carbon deposition and sludge in the system reaches 69.2-90.1%.

2. The lubricating oil composition of claim 1, wherein: the base oil is at least one of III-type hydrogenated base oil and poly alpha-olefin base oil.