CN-121991746-A - Energy-saving engine oil composition and application thereof

Abstract

The invention belongs to the technical field of lubricating oil, and particularly relates to an energy-saving engine oil composition and application thereof. The raw materials of the engine oil composition comprise base oil, a detergent, an ashless dispersant, a phenolic ester type amine antioxidant, an antiwear agent, a viscosity index improver, a pour point depressant, an ionic liquid additive and an antifoaming agent, wherein the ionic liquid additive is an ester type antiwear agent containing quaternary ammonium salt, and the chemical structural formula of the ionic liquid additive is as follows: The composition is prepared by selecting an engine oil complexing agent, a viscosity index improver styrene copolymer, a pour point depressant and an ionic liquid from group III base oil, PAO base oil or a mixture of the group III base oil and the PAO base oil. Has the characteristics of low phosphorus, low sulfur and low ash content. Besides meeting the normal lubrication condition of the engine oil, the wear resistance of the engine oil is improved, and a good energy-saving effect is achieved.

Inventors

• LIU YING
• Shao tengfei
• YANG CHAO
• SUN RUIHUA
• JI JIE

Assignees

• 中国石油天然气股份有限公司

Dates

Publication Date

20260508

Application Date

20241106

Claims (13)

1. 1. The energy-saving engine oil composition is characterized by comprising the following components of base oil, a detergent, an ashless dispersant, an antioxidant, an antiwear agent, a viscosity index improver, a pour point depressant, an ionic liquid additive and an antifoaming agent, wherein the ionic liquid additive is an ester antiwear agent containing quaternary ammonium salt, and the chemical structural formula of the ionic liquid additive is as follows:
2. 2. The engine oil composition of claim 1, wherein the base oil comprises a mixture of a group III mineral base oil and a polyalphaolefin synthetic base oil in a mass ratio of 68-80:5-10.
3. 3. The engine oil composition of claim 1, wherein the detergent is a magnesium salt of an alkyl salicylate.
4. 4. The engine oil composition of claim 1, wherein the ashless dispersant is a mixture of mono-polyisobutylene succinimide based dispersants, di-polyisobutylene succinimide based dispersants, and boronated polyisobutylene succinimide based dispersants.
5. 5. The engine oil composition according to claim 4, wherein the mass ratio of the mono-polyisobutylene succinimide-based dispersant, the di-polyisobutylene succinimide-based dispersant, and the boronated polyisobutylene succinimide-based dispersant is 0.2-0.4:0.2-5.5:2-3.
6. 6. The engine oil composition according to claim 1, wherein the antioxidant is a mixture of methyl 3, 5-di-tert-butyl-4-hydroxyphenyl acrylate and alkyl diphenylamine in a mass ratio of 1-2:0.1-1.
7. 7. The engine oil composition of claim 1 wherein the antiwear agent is a mixture of organomolybdenum and organoborate in a mass ratio of 0.5-2:0.1-0.5.
8. 8. The engine oil composition of claim 7, wherein the organo-molybdenum is molybdenum dithiocarbamate.
9. 9. The engine oil composition of claim 1, wherein the viscosity index improver is a styrene copolymer.
10. 10. The engine oil composition of claim 1, wherein the pour point depressant is a polymethacrylate.
11. 11. The engine oil composition of claim 1, wherein the anti-foaming agent is a complex anti-foaming agent.
12. 12. The engine oil composition according to any one of claims 1 to 11, wherein the engine oil composition comprises, in parts by weight, 70 to 90 parts of a base oil, 1.5 to 2.5 parts of a detergent, 2.5 to 8 parts of an ashless dispersant, 1.5 to 3 parts of an antioxidant, 1 to 2.5 parts of an antiwear agent, 7 to 10 parts of a viscosity index improver, 0.15 to 0.3 part of a pour point depressant, 2 to 5 parts of an ionic liquid additive, and 0.02 to 0.06 parts of an antifoaming agent.
13. 13. Use of an engine oil composition according to any one of claims 1 to 12 in a lubrication system for a light-duty gasoline and diesel engine oil.

Description

Energy-saving engine oil composition and application thereof Technical Field The invention relates to the technical field of lubricating oil, in particular to an energy-saving engine oil composition and application thereof. Background With the continuous development of the automobile industry and the increasingly stringent environmental protection requirements, higher requirements are placed on the performance of engine oils. On one hand, the engine technology is continuously improved, and the novel engine has more severe requirements on functions of lubricating, cleaning, cooling and the like of engine oil while improving power output. On the other hand, the tightening of environmental protection regulations is also an important factor for promoting the development of European standard light-load engine oil. In order to reduce the pollution of automobile exhaust emission to the environment, strict emission standards are formulated in various countries. Low emission and low oil consumption are the development trend of the automobile industry. The European standard C5 engine oil has lower sulfur, phosphorus and ash contents, can effectively reduce the blockage of a tail gas aftertreatment system, reduce the emission of particulate matters, and improve the fuel economy on the premise of not affecting the performance of the engine. In addition, consumer demands for performance and reliability of automobiles are continually increasing. They want the engine to be more durable, reducing maintenance costs. The European standard C5 engine oil can provide better protection for the engine and prolong the service life of the engine by virtue of excellent wear resistance, oxidation resistance and corrosion resistance. In summary, under the combined action of various factors such as engine technical progress, environmental regulations tightening and consumer demand improvement, the European standard C5 engine oil is generated and gradually becomes an important development direction of the automobile engine oil. Chinese patent CN 105524689A provides an engine oil special for meeting requirements of API SN and ILSAC GF-5 specification and a preparation process thereof, and mainly adopts molybdenum dialkyldithiocarbamate as a friction reducer to realize the low-viscosity and low-friction coefficient energy-saving engine oil composition. Chinese patent CN 107828485A provides a preparation technology for solving the problem that the heavy vehicle can be better and less in abrasion and fuel saving under the high-temperature and high-load environment. The above patent is only API specification or formulation design for heavy duty vehicle engine oils, the latest eurohexa specification and meeting the light load C5 engine oil is not reported. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides an energy-saving engine oil composition and application thereof. The composition is prepared by selecting an engine oil complexing agent, a viscosity index improver styrene copolymer, a pour point depressant and an ionic liquid from group III base oil, PAO base oil or a mixture of the group III base oil and the PAO base oil. Has the characteristics of low phosphorus, low sulfur and low ash content. Besides meeting the normal lubrication condition of the engine oil, the wear resistance of the engine oil is improved, and the energy-saving effect is achieved. In order to achieve the purpose of the invention, the technical scheme adopted is as follows: The energy-saving engine oil composition is characterized by comprising the following components of base oil, a detergent, an ashless dispersant, an antioxidant, an antiwear agent, a viscosity index improver, a pour point depressant, an ionic liquid additive and an antifoaming agent, wherein the ionic liquid additive is an ester antiwear agent containing quaternary ammonium salt, and the chemical structural formula of the ionic liquid additive is as follows: can be easily dissolved in mineral base oil, does not contain phosphorus element, and has higher abrasion resistance and heat stability. Preferably, the base oil comprises a mixture of group III mineral base oil and poly alpha-olefin synthetic base oil in a mass ratio of 68-80:5-10. Among them, group III mineral base oils have low volatility, high viscosity index, excellent additive sensitivity, improved thermal and oxidative stability, and better fuel economy. The poly alpha-olefin synthetic base oil has the advantages of high viscosity index, high flash point, high ignition point, low volatility, good heat and oxidation stability and good compatibility with most additives. Preferably, the detergent is a magnesium salt of an alkyl salicylate. Has low ash content, good abrasion resistance and good high-temperature stability. Preferably, the ashless dispersant is a mixture of a mono-polyisobutylene succinimide dispersant, a di-polyisobutylene succinimide dispersant, a boronated polyisobutylene succi