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 engine oil composition is prepared from the following raw material components: base oil, a clearing agent, an ashless dispersant, a phenolic ester type amine antioxidant, an anti-wear agent, a viscosity index improver, a pour point depressant, an ionic liquid additive and an anti-foaming agent, wherein the ionic liquid additive is a quaternary ammonium salt-containing ester anti-wear agent, 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 ionic liquid from the base oil which is III type base oil, PAO type base oil or a mixture of the III type base oil and the PAO type base oil. The catalyst has the characteristics of low phosphorus, low sulfur and low ash content. The normal lubrication working condition of the engine oil is met, the abrasion resistance of the engine oil is improved, and a good energy-saving effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil technology, and more specifically to an energy-saving engine oil composition and its application. Background Technology

[0002] With the continuous development of the automotive industry and increasingly stringent environmental protection requirements, higher demands are being placed on engine oil performance. On the one hand, engine technology is constantly advancing, and new engines, while increasing power output, place more stringent demands on the lubrication, cleaning, and cooling functions of engine oil. OEMs are upgrading their designated oils and raising energy-saving requirements. On the other hand, tightening environmental regulations are also a significant factor driving the development of European standard light-duty engine oils. To reduce the pollution caused by vehicle exhaust emissions, countries have formulated strict emission standards. Low emissions and low fuel consumption have become the development trend of the automotive industry. European standard C5 engine oil has lower sulfur, phosphorus, and ash content, effectively reducing clogging of exhaust aftertreatment systems, lowering particulate matter emissions, and improving fuel economy without affecting engine performance.

[0003] Furthermore, consumers are increasingly demanding higher performance and reliability from their vehicles. They want engines to be more durable and reduce maintenance costs. European Standard C5 engine oil, with its excellent anti-wear, anti-oxidation, and anti-corrosion properties, provides better protection for the engine and extends its lifespan.

[0004] In summary, driven by factors such as advancements in engine technology, tightening environmental regulations, and rising consumer demand, European standard C5 engine oil has emerged and is gradually becoming an important development direction for automotive engine oils.

[0005] Chinese patent CN 105524689 A provides an engine oil that meets the requirements of API SN and ILSAC GF-5 specifications and its preparation process. It mainly uses molybdenum dialkyl dithiocarbamate as a friction reducer to achieve a low viscosity, low friction coefficient, and energy-saving engine oil composition.

[0006] Chinese patent CN107828485 A provides a preparation technology for lubricating oil that can better reduce wear and save fuel in heavy vehicles under high temperature and high load conditions.

[0007] The above invention patents only cover API specifications or formulation designs for engine lubricants for heavy-duty vehicles. There are no reports on the latest Euro VI specifications that meet the requirements of light-duty C5 engine oils. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an energy-saving engine oil composition and its application. This composition comprises, in the case of Group III base oil, PAO base oil, or a mixture of both, selected engine oil compounding agents, viscosity index improvers (styrene copolymers), pour point depressants, and ionic liquids. It features low phosphorus, low sulfur, and low ash content. In addition to meeting the normal lubrication requirements of engine oils, it improves the anti-wear properties of engine oils and achieves energy-saving effects.

[0009] To achieve the objectives of this invention, the following technical solution is adopted:

[0010] An energy-saving engine oil composition, characterized in that the raw materials of the engine oil composition include the following components: base oil, detergent, ashless dispersant, antioxidant, anti-wear agent, viscosity index improver, pour point depressant, ionic liquid additive, and antifoaming agent; wherein the ionic liquid additive is an ester-based anti-wear agent containing quaternary ammonium salt, and its chemical structural formula is as follows:

[0011]

[0012] It is readily soluble in mineral base oils, contains no phosphorus, and possesses high anti-wear and thermal stability.

[0013] Preferably, the base oil comprises a mixture of Group III mineral base oil and polyalphaolefin synthetic base oil in a mass ratio of 68-80:5-10.

[0014] Group III mineral base oils possess advantages such as low volatility, high viscosity index, excellent additive responsiveness, improved thermal and oxidative stability, and better fuel economy. Polyalphaolefin synthetic base oils offer advantages such as high viscosity index, high flash point, high ignition point, low volatility, good thermal and oxidative stability, and good compatibility with most additives.

[0015] Preferably, the detergent is a magnesium alkyl salicylate salt. It possesses low ash content, good abrasion resistance, and excellent high-temperature stability.

[0016] Preferably, the ashless dispersant is a mixture of monoisobutylene succinimide dispersants, diisobutylene succinimide dispersants, and boronized polyisobutylene succinimide dispersants. It can effectively decompose soot and organic pollutants in oil products, while also possessing good thermal stability.

[0017] Preferably, the mass ratio of the monoisobutylene succinimide dispersant, the diisobutylene succinimide dispersant, and the boronized polyisobutylene succinimide dispersant is 0.2-0.4:0.2-5.5:2-3.

[0018] Preferably, the antioxidant is a mixture of methyl 3,-di-tert-butyl-4-hydroxyphenyl acrylate and alkyl diphenylamine in a mass ratio of 1-2:0.1-1. It possesses excellent high-temperature antioxidant properties, effectively inhibiting the formation of oxides and nitrates during oil aging and reducing piston deposits.

[0019] Preferably, the anti-wear agent is a mixture of organic molybdenum and organic borate esters in a mass ratio of 0.5-2:0.1-0.5. It improves the overall lubrication performance of engine oils, enabling them to provide good lubrication protection for mechanical components under different operating conditions, enhancing load-bearing capacity, and adapting to complex working conditions such as high loads and high speeds.

[0020] Preferably, the organic molybdenum is molybdenum dithiocarbamate.

[0021] Preferably, the viscosity index improver is a styrene copolymer. It possesses strong thickening ability, good shear stability, and also exhibits good low-temperature performance and thermal oxidation stability.

[0022] Preferably, the pour point depressant is polymethacrylate. It can effectively improve the pour point depressing effect of oils and also improve the viscosity index of oils.

[0023] Preferably, the antifoaming agent is a composite antifoaming agent. It can take into account antifoaming properties, oil solubility, and stability.

[0024] Preferably, the raw materials of the engine oil composition, by weight, include the following components: 70-90 parts base oil, 1.5-2.5 parts detergent, 2.5-8 parts ashless dispersant, 1.5-3 parts antioxidant, 1-2.5 parts anti-wear agent, 7-10 parts viscosity index improver, 0.15-0.3 parts pour point depressant, 2-5 parts ionic liquid additive, and 0.02-0.06 parts antifoaming agent.

[0025] Another object of the present invention is to provide the application of the above-described engine oil composition in the lubrication system of a light-load gasoline and diesel universal engine oil.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] This invention provides an energy-saving engine oil composition suitable for lubrication systems of European standard C5 series light-duty gasoline and diesel engine oils. It boasts excellent environmental performance due to its low sulfur, low phosphorus, and low ash content. Its low viscosity allows for smoother oil flow, reducing internal friction and enabling efficient operation, thus lowering fuel consumption and demonstrating excellent fuel economy. The high-quality base oils and additives in the engine oil form a robust oil film on the engine surface, preventing direct contact between metal parts, reducing wear and friction, and extending engine life. Furthermore, this engine oil mixture is widely applicable, suitable for various engine types and compatible with different driving environments. It also exhibits good high-temperature stability and excellent cleaning properties. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments.

[0029] Example 1

[0030] The formulation of this embodiment is shown in Table 1, and the structural formula of the ionic liquid is shown below:

[0031]

[0032] Table 1. Composition and proportion of energy-saving engine oil in Example 1

[0033]

[0034]

[0035] The performance test results of the energy-saving engine oil blended in this embodiment are shown in Table 2.

[0036] Table 2 Performance data of energy-saving engine oil in Example 1

[0037]

[0038]

[0039] As shown in Table 2, the energy-saving engine oil composition of this invention exhibits excellent viscosity-temperature properties, contains no phosphorus-containing additives, and demonstrates superior antioxidant performance, with an oxidation induction period of 131 minutes. This demonstrates stronger antioxidant properties than ordinary engine oils, effectively resisting oil deterioration at high temperatures and inhibiting the formation of oxides and nitrates. Fuel economy testing (M111) shows that the energy-saving engine oil, even after a certain period of heating and oxidation at high temperatures, exhibits stable performance and service life, significantly improving fuel economy. Detergent testing (VW TDI) demonstrates that the energy-saving engine oil effectively prevents deposit formation, reduces wear on engine components, and maintains stable oil performance over extended periods, thereby improving fuel economy. It can meet the lubrication needs of the engine.

[0040] Example 2

[0041] The formulation for this embodiment is shown in Table 3:

[0042] Table 3. Composition and proportion of energy-saving engine oil in Example 2

[0043]

[0044] Example 3

[0045] The formula for this embodiment is shown in Table 4:

[0046] Table 4. Composition and proportion of energy-saving engine oil in Example 3

[0047]

[0048] Comparative Example 1

[0049] The difference between this comparative example and Example 1 is that the ionic liquid is removed. The specific formulation is shown in Table 5 below:

[0050] Table 5. Composition and proportions of energy-saving engine oil in Comparative Example 1

[0051]

[0052]

[0053] Comparative Example 2

[0054] The difference between this comparative example and Example 1 is that the molybdenum dithiocarbamate anti-wear agent is removed. The specific formulation is shown in Table 6 below:

[0055] Table 6. Composition and proportion of energy-saving engine oil in Comparative Example 2

[0056]

[0057] Comparative Example 3

[0058] The difference between this comparative example and Example 1 is that methyl 3,5-di-tert-butyl-4-hydroxy-phenyl acrylate is replaced with ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, while the rest remain unchanged. The specific formulation is shown in Table 7 below.

[0059] Table 7. Composition and proportions of energy-saving engine oil in Comparative Example 3

[0060]

[0061] The performance tests of the energy-saving engine oils blended in Examples 2-3 and Comparative Examples 1-3 are shown in Table 8. The test methods are as described in Table 2.

[0062] Table 8 Performance data of energy-saving engine oil

[0063]

[0064]

[0065]

[0066] The above detailed description is a specific description of one of the feasible embodiments of the present invention. This embodiment is not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included within the scope of the technical solution of the present invention.

Claims

1. An energy-saving engine oil composition, characterized in that, The raw materials of the engine oil composition include the following components: base oil, detergent, ashless dispersant, antioxidant, anti-wear agent, viscosity index improver, pour point depressant, ionic liquid additive, and antifoaming agent; wherein, the ionic liquid additive is an ester-based anti-wear agent containing quaternary ammonium salt, and its chemical structural formula is as follows:

2. The engine oil composition according to claim 1, characterized in that, The base oil comprises a mixture of Group III mineral base oil and polyalphaolefin synthetic base oil in a mass ratio of 68-80:5-10.

3. The engine oil composition according to claim 1, characterized in that, The cleaning agent is magnesium alkyl salicylate.

4. The engine oil composition according to claim 1, characterized in that, The ashless dispersant is a mixture of monoisobutylene succinimide dispersants, diisobutylene succinimide dispersants, and boronized polyisobutylene succinimide dispersants.

5. The engine oil composition according to claim 4, characterized in that, The mass ratio of the monoisobutylene succinimide dispersant, the diisobutylene succinimide dispersant, and the boronized polyisobutylene succinimide dispersant is 0.2-0.4:0.2-5.5:2-3.

6. The engine oil composition according to claim 1, characterized in that, 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. The engine oil composition according to claim 1, characterized in that, The anti-wear agent is a mixture of organic molybdenum and organic borate in a mass ratio of 0.5-2:0.1-0.

5.

8. The engine oil composition according to claim 7, characterized in that, The organic molybdenum is molybdenum dithiocarbamate.

9. The engine oil composition according to claim 1, characterized in that, The viscosity index improver is a styrene copolymer.

10. The engine oil composition according to claim 1, characterized in that, The pour point depressant is polymethyl methacrylate.

11. The engine oil composition according to claim 1, characterized in that, The antifoaming agent is a composite antifoaming agent.

12. The engine oil composition according to any one of claims 1-11, characterized in that, By weight, the raw materials of the engine oil composition include the following components: 70-90 parts base oil, 1.5-2.5 parts detergent, 2.5-8 parts ashless dispersant, 1.5-3 parts antioxidant, 1-2.5 parts anti-wear agent, 7-10 parts viscosity index improver, 0.15-0.3 parts pour point depressant, 2-5 parts ionic liquid additive, and 0.02-0.06 parts antifoaming agent.

13. The use of the engine oil composition according to any one of claims 1-12 in the lubrication system of a light-load gasoline and diesel universal engine oil.

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