CN111363604A - Lubricating oil composition for suppressing knocking phenomenon and use thereof - Google Patents
Lubricating oil composition for suppressing knocking phenomenon and use thereof Download PDFInfo
- Publication number
- CN111363604A CN111363604A CN202010205673.6A CN202010205673A CN111363604A CN 111363604 A CN111363604 A CN 111363604A CN 202010205673 A CN202010205673 A CN 202010205673A CN 111363604 A CN111363604 A CN 111363604A
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- lubricating oil
- percent
- oil composition
- agent
- foaming agent
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/086—Imides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
Abstract
A lubricating oil composition for inhibiting the detonation phenomenon comprises the following components in percentage by mass: 80 to 81 percent of base oil, 0.01 to 0.05 percent of anti-foaming agent, 8 to 10 percent of viscosity index improver, 4.5 to 5.5 percent of detergent dispersant, 2.5 to 3.5 percent of antiwear agent and 1 to 2 percent of antioxidant corrosion inhibitor. The invention optimizes the formula of the lubricating oil composition, thereby reducing the quality of lubricating oil entering a combustion chamber and reducing compounds capable of causing spontaneous combustion, and further inhibiting the phenomenon of detonation.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to a lubricating oil composition for inhibiting a detonation phenomenon and application thereof.
Background
Lubrication can improve the friction state and reduce the friction resistance, and is an effective friction reducing measure. The lubricating is carried out at the contact position of the engine piston and the cylinder, so that the working condition of the piston can be effectively improved. The lubricating oil has the function of forming a layer of oil film on the working surfaces of the two to reduce the frictional resistance and ensure that the work is smoother. Although the lubricating oil has a plurality of advantages, the research at home and abroad finds that the lubricating oil can cause low-speed pre-ignition, thereby causing detonation. The lubricating oil can enter the combustion chamber in various ways. And in the process of piston movement, lubricating oil accumulated in the piston ring land gap is thrown into a combustion chamber. When the fuel spray hits the wall to dilute the lubricating oil film, the lubricating oil in the piston ring land gap is released after the viscosity and surface tension of the lubricating oil are reduced. The long paraffin contained in the lubricating oil has good reactivity, and can cause self-ignition and ignition of surrounding mixed gas to cause detonation in a compression stroke after entering a combustion chamber. Meanwhile, Ca detergent (such as calcium salicylate) in the lubricating oil can promote spontaneous combustion and abnormal combustion to cause detonation.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a lubricating oil composition for suppressing the knocking phenomenon and its application, which are intended to solve at least partially at least one of the above-mentioned technical problems.
In order to solve the problems, the invention adopts the technical scheme that:
as one aspect of the present invention, there is provided a lubricating oil composition for suppressing a knocking phenomenon, comprising the following components in percentage by mass: 80 to 81 percent of base oil, 0.01 to 0.05 percent of anti-foaming agent, 8 to 10 percent of viscosity index improver, 4.5 to 5.5 percent of detergent dispersant, 2.5 to 3.5 percent of antiwear agent and 1 to 2 percent of antioxidant corrosion inhibitor.
As another aspect of the present invention, there is also provided a use of the above-described knock-suppressing lubricating oil composition in the field of knock-suppressing lubrication.
Based on the technical scheme, compared with the prior art, the lubricating oil composition for inhibiting the knocking phenomenon has at least one or part of the following beneficial effects:
(1) according to the lubricating oil composition, the formula of the lubricating oil composition is optimized, so that the quality of lubricating oil entering a combustion chamber is reduced, and compounds capable of causing spontaneous combustion are reduced, so that the knocking phenomenon is inhibited;
(2) the base oil adopts mineral base oil of a mixture of high-boiling point and high molecular weight hydrocarbon and non-hydrocarbon so as to improve the flash point;
(3) the novel alkylidene imino succinimide is adopted as an ashless clean dispersant, and a calcium-based clean dispersant such as calcium salicylate and the like is not used, because Ca promotes spontaneous combustion and abnormal combustion, thereby causing knocking.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
As one aspect of the present invention, there is provided a lubricating oil composition for suppressing a knocking phenomenon, comprising the following components in percentage by mass: 80 to 81 percent of base oil, 0.01 to 0.05 percent of anti-foaming agent, 8 to 10 percent of viscosity index improver, 4.5 to 5.5 percent of detergent dispersant, 2.5 to 3.5 percent of antiwear agent and 1 to 2 percent of antioxidant corrosion inhibitor.
In an embodiment of the invention, the base oil is a mineral base oil;
preferably, the boiling point of the mineral base oil is 350-535 ℃, and the relative molecular mass of the mineral base oil is 250-1000;
more specifically, the mineral base oil of the embodiment of the invention is a mixture of high boiling point, high relative molecular mass hydrocarbons and non-hydrocarbons of petroleum, which is obtained by a series of processes; the main components of the mineral base oil comprise straight-chain alkane, isoparaffin, cycloparaffin and aromatic hydrocarbon of C20-C40, and non-hydrocarbon compounds such as oxygen-containing, nitrogen-containing and sulfur-containing organic compounds, colloid, asphaltene and the like, and almost no olefin is contained.
It is worth noting that in the examples of the present invention, mineral base oil is the main component of engine oil that can serve as a lubricating and friction reducing component. Too little addition can not play the roles of lubrication and antifriction; if the additive is added too much, the corresponding additive content is reduced, and the function of the additive for remedying the defects of the base oil cannot be exerted. In general, 80% to 81% base oil is preferred.
In an embodiment of the present invention, the anti-foaming agent includes one or more of a silicon-based anti-foaming agent, a non-silicon-based anti-foaming agent, and a composite anti-foaming agent;
preferably, the silicon-based anti-foaming agent comprises dimethicone;
preferably, the non-silicon type anti-foaming agent comprises one or more of acrylate, homopolymer of methacrylate and copolymer of methacrylate;
preferably, the compound antifoaming agent is a compound of silicone oil and a non-silicon antifoaming agent;
in the embodiment of the invention, the defoaming agent of the lubricating oil composition for inhibiting the knocking phenomenon is selected from dimethyl silicone oil by combining the principle of economic applicability.
It is to be noted that, in the examples of the present invention, too small an amount of the antifoaming agent is added to inhibit the foaming phenomenon of the lubricating oil from damaging the engine, and therefore the amount of the antifoaming agent is preferably 0.01% to 0.05%.
In embodiments of the invention, the viscosity index improver comprises one or more of polymethacrylate, olefin copolymer, hydrogenated styrene-diene copolymer;
preferably, the viscosity index improver comprises one or more of polymethacrylate, ethylene-propylene copolymer and hydrogenated styrene-isoprene copolymer;
in the embodiment of the invention, polymethacrylate with strong thermal oxidative stability, good low-temperature viscosity and good pumpability is preferably used as the viscosity index improver according to the requirements of the working environment of an engine.
It is worth mentioning that the usage amount of the viscosity improver generally accounts for about 20% of the additive content, and in the embodiment of the invention, 8% to 10% is preferred; the addition is too little, the viscosity of the lubricating oil is not enough, a lubricating oil film cannot be effectively formed, and the lubricating effect is influenced; the excessive addition of the additive increases the resistance due to the higher viscosity.
In embodiments of the invention, the detergent dispersant comprises one or more of an alkyleneiminosuccinimide, a polyisobutylene succinimide, a polyisobutylene succinate, a phosphosulfurized polyisobutylene polyoxyethylene ester;
preferably, the detergent dispersant comprises an alkylene imino succinimide.
More specifically, typical examples of detergent dispersants are petroleum sulfonates, alkyl phenates, salicylates, succinimides, succinates, and polymers. The first three are metallic detergent dispersants, the last three are ashless dispersants.
Since Ca promotes spontaneous combustion and abnormal combustion, leading to knocking, the present invention does not use a calcium-based detergent dispersant such as calcium salicylate, etc.
In the examples of the present invention, polyisobutylene succinimide, polyisobutylene succinate, and phosphosulfurized polyisobutylene polyoxyethylene ester can be used as the detergent dispersant. However, the preferred embodiment of the present invention is an alkylene imino succinimide, which is a preferred ashless detergent dispersant because of its ease of synthesis.
The added alkylene imino succinimide detergent dispersant has too low mass to effectively inhibit the deposition of impurities such as oil sludge residue in an engine, so 4.5-5.5% by mass of alkylene imino succinimide is required.
In an embodiment of the present invention, the antiwear agent is an extreme pressure antiwear agent;
the extreme pressure antiwear agent has various varieties, including chlorine-containing antiwear agents, sulfur-containing antiwear agents, phosphorus-containing antiwear agents, organic metal salt antiwear agents, borate antiwear agents, overbased sulfonate antiwear agents and the like. Although the antiwear agent containing sulfur and phosphorus has better performance at low speed and high speed of the engine, the sulfur element has influence on the emission of the engine, so the preferable antiwear agent containing phosphorus is selected as the extreme pressure antiwear agent.
Preferably, the phosphorus-containing antiwear agent comprises one or more of alkyl phosphite, phosphate ester, acidic phosphate ester amine salt and thiophosphate ester amine salt;
considering that acidic antiwear agents may cause corrosion of parts; preferably, the antiwear agent is an alkyl phosphite.
In addition, it is worth noting that the anti-wear additive is not added to the lubricating oil enough to separate the two working surfaces when subjected to localized high temperature and pressure. Excessive addition of the additive can generate new compounds with other impurities in an engine under the action of high temperature, high pressure and high shearing force, thereby causing the blockage of a lubricating oil path. Therefore, it is preferably 2.5% to 3.5%.
In embodiments of the present invention, the antioxidant corrosion inhibitor includes an amine-type antioxidant corrosion inhibitor;
the common antioxidant and anticorrosive agent includes phenol type and amine type. The amine type anti-oxidation and anti-corrosion agent has higher working temperature than the phenol type, better durability than the phenol type, and good effects of prolonging the induction period of the oil product and inhibiting the late oxidation of the oil product, so the amine type anti-oxidation and anti-corrosion agent is preferred.
Preferably, the amine type antioxidant and anticorrosive agent comprises one or more of phenyl- α -naphthylamine, dialkyl diphenylamine and alkylated diphenylamine;
preferably, the oxidation and corrosion inhibitor comprises phenyl- α -naphthylamine.
Wherein, the addition of the antioxidant corrosion inhibitor is too little, and the lubricating oil can be oxidized and deteriorated under the high-temperature environment in contact with air, thereby losing the lubricating and antifriction functions. Therefore, the amount of addition is preferably 1% to 2%.
As another aspect of the present invention, there is also provided a use of the above-described knock-suppressing lubricating oil composition in the field of knock-suppressing lubrication.
Example 1
A lubricating oil composition capable of inhibiting a knocking phenomenon is prepared from the following materials in percentage by mass:
80 percent of mineral base oil, 0.02 percent of methyl silicone oil antifoaming agent, 10 percent of polymethacrylate viscosity index improver, 5.0 percent of alkylene imino succinimide clean dispersant, 3.0 percent of ashless phosphorus type antiwear agent and 1.98 percent of amine type antioxidant corrosion inhibitor.
Example 2
A lubricating oil composition capable of inhibiting a knocking phenomenon is prepared from the following materials in percentage by mass:
80% of mineral base oil, 0.05% of methyl silicone oil antifoaming agent, 10% of polymethacrylate viscosity index improver, 5.5% of alkylene imino succinimide clean dispersant, 3.0% of ashless phosphorus type antiwear agent and 1.45% of amine type antioxidant corrosion inhibitor.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A lubricating oil composition for inhibiting the knocking phenomenon is characterized by comprising the following components in percentage by mass: 80 to 81 percent of base oil, 0.01 to 0.05 percent of anti-foaming agent, 8 to 10 percent of viscosity index improver, 4.5 to 5.5 percent of detergent dispersant, 2.5 to 3.5 percent of antiwear agent and 1 to 2 percent of antioxidant corrosion inhibitor.
2. The knock suppressing lubricating oil composition according to claim 1, wherein the base oil is a mineral base oil;
preferably, the boiling point of the mineral base oil is 350-535 ℃, and the relative molecular mass of the mineral base oil is 250-1000.
3. The knocking suppressing lubricating oil composition according to claim 1, wherein said anti-foaming agent comprises one or more of a silicon type anti-foaming agent, a non-silicon type anti-foaming agent and a composite type anti-foaming agent;
preferably, the silicon-based anti-foaming agent comprises dimethicone;
preferably, the non-silicon type anti-foaming agent comprises one or more of acrylate, homopolymer of methacrylate and methacrylate copolymer;
preferably, the compound antifoaming agent is a compound of the silicone oil and a non-silicon antifoaming agent;
preferably, the antifoaming agent is dimethicone.
4. The lubricating oil composition for suppressing knocking phenomenon according to claim 1, wherein said viscosity index improver comprises one or more of polymethacrylate, olefin copolymer, hydrogenated styrene-diene copolymer;
preferably, the viscosity index improver comprises one or more of polymethacrylate, ethylene-propylene copolymer and hydrogenated styrene-isoprene copolymer;
preferably, the viscosity index improver is polymethacrylate.
5. The lubricating oil composition for suppressing knocking phenomenon according to claim 1, wherein said detergent dispersant comprises one or more of alkyleneiminosuccinimide, polyisobutylene succinimide, polyisobutylene succinate ester, and phosphosulfurized polyisobutylene polyoxyethylene ester;
preferably, the detergent dispersant is alkylene imino succinimide.
6. The lubricating oil composition for suppressing knocking phenomenon according to claim 1, wherein said antiwear agent is an extreme pressure antiwear agent;
preferably, the extreme pressure antiwear agent comprises a phosphorus-containing antiwear agent;
preferably, the phosphorus-containing antiwear agent comprises one or more of alkyl phosphite, phosphate ester, acidic phosphate ester amine salt and thiophosphate ester amine salt;
preferably, the antiwear agent is an alkyl phosphite.
7. The knock suppressing lubricating oil composition of claim 1, wherein the corrosion and oxidation inhibitor comprises an amine corrosion and oxidation inhibitor;
preferably, the amine type antioxidant and anticorrosive agent comprises one or more of phenyl- α -naphthylamine, dialkyl diphenylamine and alkylated diphenylamine;
preferably, the antioxidant and corrosion inhibitor is phenyl- α -naphthylamine.
8. Use of a lubricating oil composition for knock suppression according to any one of claims 1 to 7 in the field of knock suppression lubrication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010205673.6A CN111363604A (en) | 2020-03-25 | 2020-03-25 | Lubricating oil composition for suppressing knocking phenomenon and use thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010205673.6A CN111363604A (en) | 2020-03-25 | 2020-03-25 | Lubricating oil composition for suppressing knocking phenomenon and use thereof |
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| CN111363604A true CN111363604A (en) | 2020-07-03 |
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| CN202010205673.6A Pending CN111363604A (en) | 2020-03-25 | 2020-03-25 | Lubricating oil composition for suppressing knocking phenomenon and use thereof |
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