Clutch boosting liquid as well as preparation method and application thereof

Abstract

The invention relates to the technical field of lubricating oil, in particular to clutch boosting liquid as well as a preparation method and application thereof. The clutch booster fluid is prepared from the following components in percentage by mass: 0.5 to 1.5 percent of nano friction reducing agent; 1%-3% of an antioxidant; 0.3%-0.7% of an anti-corrosion slow-release agent; 1%-5% of an anti-rubber swelling agent; 2%-5% of a viscosity regulator; 0.45%-0.75% of an acidity regulator; 0.005% to 0.015% of a defoaming agent; the balance is basic liquid; the pH value of the clutch boosting liquid is weakly alkaline. The friction coefficient of the clutch booster fluid provided by the invention is less than or equal to 0.062 N / m < 2 >, the clutch durability test passes 2 million times, the antifriction property, durability and service life are far better than those of the current common DOT3 brake fluid, and the requirements of large displacement, high power, large torque and long mileage of commercial vehicles can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating oils, and in particular to a clutch boosting fluid and a preparation method and application thereof. Background Art

[0002] In commercial vehicle transmission systems, clutch booster fluid is the core medium for transmitting force during clutch disengagement and engagement. It performs key functions such as energy transfer, lubrication protection, heat dissipation, sealing, and corrosion and rust prevention. Its performance directly impacts the proper functioning of the clutch system. Insufficient or degraded booster fluid can lead to decreased clutch performance and even threaten vehicle operating safety.

[0003] Currently, OEMs both domestically and internationally generally use the same brake fluid used in the braking system as clutch booster fluid. This choice is based on the fact that, while the clutch and brake systems operate under different conditions, both utilize the principle of incompressibility of liquids to transmit oil pressure to achieve their functions. Therefore, brake fluid can serve as the force transmission medium for clutch disengagement and engagement.

[0004] Brake fluids are primarily classified into three types: alcohol, mineral oil, and synthetic. Synthetic brake fluids are the mainstream in the market. These are based on substances such as ethers, alcohols, and esters, with additives such as lubricants, antioxidants, rust inhibitors, and rubber anti-swelling agents. They exhibit a high boiling point, good low-temperature fluidity, low water absorption, and adequate lubrication and sealing properties, but they are also somewhat corrosive. The replacement cycle for this type of brake fluid is typically 40,000 to 50,000 kilometers or three years.

[0005] Despite widespread use, brake fluids have significant shortcomings in commercial vehicle clutch systems: 1. Performance Mismatch: In international classification, DOT3 brake fluid (national standard HZY3) complies with the GB / T12981 "Motor Vehicle Brake Fluid" standard, which does not specify friction reduction performance and has a service life verified only through 85,000 stroke simulation tests. However, with technological upgrades in commercial vehicles, new-generation clutch systems must pass durability tests exceeding 2 million cycles, and the lifespan requirements of existing brake fluids fall far short of these standards. 2. Compatibility Issues: To improve friction reduction, domestic clutch master and slave cylinder production often uses oil-based lubricants to coat the cups. However, oil-based materials share the same polarity as the cups (rubber), leading to a "like dissolves like" phenomenon. This can cause cup swelling, leading to quality issues such as master and slave cylinder sticking and leakage, and ultimately increasing clutch system quality compensation costs for OEMs. Consequently, conventional brake fluids, in terms of friction reduction performance, compatibility with non-metallic materials, and service life, are no longer able to meet the demands of commercial vehicles for larger displacement, higher power, higher torque, and longer mileage. Summary of the Invention

[0006] The present invention provides a clutch boosting fluid and a preparation method and application thereof, so as to solve the problem in the related art that traditional brake fluid cannot meet the requirements of large displacement, high power, high torque and long mileage of commercial vehicles.

[0007] The present invention provides the following technical solutions: In a first aspect, the present invention provides a clutch boosting fluid, wherein the clutch boosting fluid is composed of the following components in percentage by weight: Nano friction reducer: 0.5%~1.5%; Antioxidant: 1%~3%; Antiseptic sustained-release agent: 0.3%~0.7%; Anti-rubber swelling agent: 1%~5%; Viscosity adjuster: 2%~5%; Acidity adjuster: 0.45%~0.75%; Defoaming agent: 0.005%~0.015%; The balance is base liquid; The pH value of the clutch power-assisting fluid is weakly alkaline.

[0008] In conjunction with the first aspect of the present invention, in some embodiments, the clutch boosting fluid is composed of the following components in percentage by weight: Nano friction reducer 0.7%~1.1%; Antioxidant: 1.7%~2.1%; Preservative sustained-release agent: 0.45%~0.65%; Anti-rubber swelling agent: 3.40%~3.90%; Viscosity adjuster: 3.00%~4.50%; Acidity adjuster: 0.48%~0.60%; Defoaming agent: 0.008%~0.012%; The balance is base liquid; The pH value of the clutch boosting fluid is 8-9.

[0009] In conjunction with the first aspect of the present invention, in some embodiments: The antioxidant is a hindered phenol antioxidant; and / or, The nano friction reducer is graphene powder; and / or, The acidity regulator is triethanolamine; and / or The antiseptic sustained-release agent is methylbenzotriazole; and / or, The anti-rubber swelling agent is dihydroxysuccinic acid; and / or, The viscosity modifier is polyethylene glycol monomethyl ether; and / or, The defoamer is a low-viscosity three-dimensional silicone defoamer.

[0010] In combination with the first aspect of the present invention, in some embodiments, the hindered phenol antioxidant is 2,6-di-tert-butyl-p-cresol.

[0011] In combination with the first aspect of the present invention, in some embodiments, the base fluid is composed of triethylene glycol monomethyl ether triester of borate and propylene glycol, wherein triethylene glycol monomethyl ether triester of borate accounts for 75% to 85% of the total mass of the clutch boosting fluid.

[0012] In conjunction with the first aspect of the present invention, in some embodiments, the kinematic viscosity of the base fluid at -40°C is less than 900 mm 2 / s.

[0013] In a second aspect, the present invention provides a method for preparing a clutch booster fluid, comprising the following steps: Prepare the ingredients for clutch booster fluid as described above; Mix triethylene glycol monomethyl ether triester of borate and propylene glycol and stir evenly to prepare a base liquid; Add nano friction reducer to the base fluid and disperse evenly at high speed; then add antioxidant, anti-corrosion slow-release agent, and anti-rubber swelling agent and stir evenly; finally add viscosity adjuster, acidity adjuster and defoamer and stir evenly; filter to remove impurities to obtain clutch booster fluid.

[0014] In a third aspect, the present invention provides application of the above-mentioned clutch boosting fluid in a hydraulically operated clutch.

[0015] In conjunction with the third aspect of the present invention, in some embodiments, the hydraulically operated clutch is an automobile clutch.

[0016] In conjunction with the third aspect of the present invention, in some embodiments, the automobile clutch is a commercial vehicle clutch.

[0017] In a fourth aspect, the present invention provides a clutch system, comprising a hydraulically operated clutch and the above-mentioned clutch boosting fluid, wherein the clutch boosting fluid is installed in the hydraulically operated clutch.

[0018] In a fifth aspect, the present invention provides an automobile, comprising a clutch system, wherein the clutch system comprises a hydraulically operated clutch and the above-mentioned clutch boosting fluid, wherein the clutch boosting fluid is installed in the hydraulically operated clutch.

[0019] In conjunction with the fifth aspect of the present invention, in some embodiments, the automobile is a commercial vehicle.

[0020] In conjunction with the fifth aspect of the present invention, in some embodiments, the commercial vehicle is a commercial vehicle having a brake fluid replacement cycle of 40,000 to 50,000 kilometers or 3 years.

[0021] Compared with the currently commonly used DOT3 brake fluid, the present invention has at least the following beneficial effects: 1. The friction coefficient of the clutch booster fluid provided by the present invention is ≤0.062N / m 2 , while the friction coefficient of DOT3 brake fluid is 0.245 N / m 2 The clutch booster fluid provided by the present invention has much better friction reduction performance than DOT3 brake fluid.

[0022] 2. The clutch durability test of the clutch booster fluid provided by the present invention has passed 2 million times, while the DOT3 brake fluid has only passed 610,000 times. The durability and service life of the clutch booster fluid provided by the present invention are better than those of the DOT3 brake fluid.

[0023] 3. The clutch booster fluid provided by the present invention has a kinematic viscosity of ≤930 mm at -40°C. 2 / s, so that the clutch boosting fluid can perform well under extreme working conditions. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] In a first aspect, the present invention provides a clutch boosting fluid, wherein the clutch boosting fluid is composed of the following components in percentage by weight: Nano friction reducer: 0.5%~1.5%; Antioxidant: 1%~3%; Antiseptic sustained-release agent: 0.3%~0.7%; Anti-rubber swelling agent: 1%~5%; Viscosity adjuster: 2%~5%; Acidity adjuster: 0.45%~0.75%; Defoaming agent: 0.005%~0.015%; The balance is base liquid; The pH value of the clutch power-assisting fluid is weakly alkaline.

[0026] The following is an analysis of the reasons for the performance improvement from the perspective of the clutch booster fluid composition: 1.Nano friction reducer Nano-friction reducers are the core component for improving friction reduction performance. Their nano-scale particles can form a uniform, dense lubricating film on the surface of the clutch friction pair, filling microscopic bumps through physical adsorption or chemical action, reducing direct contact between metals, thereby reducing the friction coefficient and friction loss. Nano-friction reducers give this clutch booster fluid excellent friction reduction performance, with a friction coefficient of less than 0.05N / m 2 .

[0027] 2. Antioxidant + acidity regulator Under the large-displacement and high-power operating conditions of commercial vehicles, the clutch system is prone to accelerated oxidation of the power-boosting fluid due to high temperature (such as frictional heat generated by frequent gear shifting), producing acidic substances (such as carboxylic acids), causing the liquid to thicken and become more corrosive. Antioxidants (such as hindered phenols and amines) can capture free radicals in the oxidation reaction and inhibit the oxidation chain reaction; acidity regulators (such as organic amines) neutralize the acidic products and maintain the pH of the clutch power-boosting fluid stable between 8 and 9. The two work synergistically to avoid the degradation of liquid performance caused by oxidation and improve durability. In the experimental results of the present invention, the antioxidant performance of the clutch power-boosting fluid was under the conditions of 70℃±2℃ and 168h±2h, with no visible pitting, pitting and colloidal precipitation, and the weight change of the cast iron sheet was less than ±0.02mg / cm 2 ; The weight change of aluminum sheet is less than ±0.03 mg / cm 2 .

[0028] 3. Antiseptic slow-release agent The clutch system of commercial vehicles contains a variety of metals (such as steel and aluminum), which are prone to electrochemical corrosion when in contact with liquids for a long time. Anti-corrosion slow-release agents (such as benzotriazole and molybdate) can form a passivation film on the metal surface, blocking the contact between corrosive media (such as water and oxygen) and the metal, while inhibiting the corrosion of harmful ions such as chloride ions. The use of anti-corrosion slow-release agents avoids system jams or leakage caused by corrosion of metal parts, and indirectly improves overall durability. In the experimental results of the present invention, the corrosion resistance of the clutch boosting fluid is under the conditions of 100℃±2℃ and 120h±2h, with no visible discoloration, pitting and surface roughness; the weight change of tinplate is less than ±0.06mg / cm 2 ; Steel sheet weight change is less than ±0.02 mg / cm 2 ; Cast iron sheet weight change is less than ±0.02mg / cm 2 ; The weight change of aluminum sheet is less than ±0.06 mg / cm 2 ; Brass sheet weight change is less than ±0.05 mg / cm 2 ; The weight change of copper sheet is less than ±0.05 mg / cm 2 ; Zinc sheet weight change is less than ±0.09 mg / cm 2 .

[0029] 4. Anti-rubber swelling agent Clutch systems contain rubber seals (such as O-rings and hoses). Anti-swelling agents (such as epoxy compounds and silane coupling agents) can adjust the compatibility between the fluid and the rubber, inhibiting excessive swelling or shrinkage of the rubber. This maintains the elasticity and dimensional stability of the seals, prevents hydraulic system failure due to leakage, and extends service life. Experimental results from this invention show that the volume increase of the clutch boosting fluid's rubber adaptability (EPDM rubber) is less than 2%.

[0030] 5. Viscosity adjuster + defoamer Commercial vehicles have complex operating conditions (alternating high and low temperatures), and the power-assisting fluid needs to maintain an appropriate viscosity within a wide temperature range (not thin at high temperatures and not thick at low temperatures). The viscosity of DOT3 brake fluid is greatly affected by temperature, which may cause the lubricating film to rupture at high temperatures (increased wear) or operation jamming at low temperatures (affecting separation / engagement efficiency). Viscosity modifiers ensure viscosity stability at different temperatures and reduce friction losses by regulating the intermolecular forces of the liquid. In the experimental results of the present invention, the kinematic viscosity of the clutch power-assisting fluid at 100°C is greater than 1.5mm 2 / s, no bubbles within 5 minutes.

[0031] Under high-torque, long-mileage operating conditions in commercial vehicles, the power steering fluid is prone to bubbles due to vigorous flow (such as frequent clutching). These bubbles can cause hydraulic transmission delays or pressure fluctuations (impairing the completeness of separation). Furthermore, localized high temperatures when bubbles rupture can accelerate fluid oxidation. Defoamers reduce the surface tension of the fluid, inhibiting bubble formation and accelerating bubble dissipation, thereby maintaining stable hydraulic system operation.

[0032] In summary, the clutch boosting fluid solves the problems of insufficient friction reduction, poor material adaptability and short life of DOT3 brake fluid in commercial vehicle scenarios through the multi-component collaborative design of "nano-friction reducer to reduce friction + antioxidant / acidity adjuster to delay oxidation + anti-corrosion slow-release agent to protect metal + anti-rubber swelling agent to be compatible with seals + viscosity / defoaming agent stabilization system", and ultimately achieves a significant reduction in friction coefficient and improvement in durability (2.3 million times).

[0033] In some embodiments of the present invention, the clutch boosting fluid is composed of the following components in percentage by weight: Nano friction reducer 0.7%~1.1%; Antioxidant: 1.7%~2.1%; Preservative sustained-release agent: 0.45%~0.65%; Anti-rubber swelling agent: 3.40%~3.90%; Viscosity adjuster: 3.00%~4.50%; Acidity adjuster: 0.48%~0.60%; Defoaming agent: 0.008%~0.012%; The balance is base liquid; The pH value of the clutch boosting fluid is 8-9.

[0034] Preferably, the pH value of the clutch boosting fluid is 8.5-9.0.

[0035] In some embodiments of the present invention: The antioxidant is a hindered phenol antioxidant; and / or, The nano friction reducer is graphene powder; and / or, The acidity regulator is triethanolamine; and / or The antiseptic sustained-release agent is methylbenzotriazole; and / or, The anti-rubber swelling agent is dihydroxysuccinic acid; and / or, The viscosity modifier is polyethylene glycol monomethyl ether; and / or, The defoamer is a low-viscosity three-dimensional silicone defoamer.

[0036] Using polyethylene glycol monomethyl ether as a viscosity adjuster can make the 100°C kinematic viscosity of the clutch power-assisting fluid greater than 1.5 mm² / s, ensuring the appropriate viscosity of the power-assisting fluid within a wide temperature range, avoiding high-temperature lubricating film rupture and low-temperature operating jams. At the same time, the -40°C kinematic viscosity of the clutch power-assisting fluid can be made ≤930 mm² / s, ensuring that the power-assisting fluid quickly fills the hydraulic pipeline in extremely cold environments and reduces low-temperature wear.

[0037] When used as a defoaming agent, the low-viscosity three-dimensional silicone defoamer can quickly adsorb on the surface of bubbles, reduce the surface tension of the liquid, effectively defoam and inhibit the generation of new bubbles, making the clutch power-assisting fluid bubble-free within 5 minutes.

[0038] The "phenolic hydroxyl group" contained in the molecular structure of hindered phenol antioxidants can effectively capture free radicals (such as ROO·) in oxidation reactions, interrupting the oxidation chain reaction. The core advantages of choosing 2,6-di-tert-butyl-p-cresol as a hindered phenol antioxidant are: High-temperature oxidation resistance: Commercial vehicle clutch systems are prone to high temperatures (up to 150°C or above) due to frequent gear shifting and high torque transmission. 2,6-di-tert-butylphenol (BHT) has a high boiling point (approximately 260°C) and can stably exist in the power steering fluid under high-temperature conditions and continue to play an antioxidant role, delaying the increase in acid value and viscosity caused by oxidation of the power steering fluid. (DOT3 brake fluid is prone to rapid oxidation and failure at high temperatures because it has no targeted antioxidants).

[0039] Good compatibility with base fluid: BHT is an oil-soluble additive with a high polarity match with the base fluid (triethylene glycol monomethyl ether triester, etc.), and can be evenly dispersed in the liquid to avoid a decrease in antioxidant efficiency due to precipitation.

[0040] In some embodiments, the acidity adjuster is triethanolamine, which is a weak organic base (pKa≈7.8). The core function of using triethanolamine as the acidity adjuster and controlling the pH to ≤9 is: Neutralizes acidic products: Oxidation of booster fluid generates carboxylic acidic substances (such as acetic acid and propionic acid), which corrode metal parts and accelerate the aging of rubber seals. The amino group (-NH2) of triethanolamine reacts with acidic substances to form stable ammonium salts, reducing the acid value of the fluid.

[0041] In some embodiments, methylbenzotriazole is selected as an anti-corrosion slow-release agent. Toluenetriazole is a highly effective corrosion inhibitor for metals such as copper and aluminum. The triazole ring in its molecule can combine with the oxide film (such as Al2O3, CuO) on the metal surface through coordination bonds to form a dense chemical adsorption film with broad-spectrum corrosion resistance and can synergize with antioxidants: the adsorption film can reduce metal ions (such as Fe 3+ ) catalyzes the oxidation reaction (metal ions accelerate the generation of free radicals), and forms a dual protection of "inhibiting oxidation and blocking corrosion" with the antioxidant BHT, further improving the durability of the power steering fluid.

[0042] In some embodiments, graphene powder is selected as a nano-friction reducer. The graphene in the clutch booster fluid has the following effects: 1. Graphene has extremely low interlayer sliding resistance (dominated by van der Waals forces), which can form a "rolling-sliding" composite lubricating film on the surface of the clutch friction pair (such as the pressure plate and the driven plate), converting the direct contact friction between metals into relative sliding between graphene sheets; 2. Graphene nanosheets can fill microscopic scratches or pits on the surface of the friction pair (which are prone to occur under the high-torque conditions of commercial vehicles). Through a "fill-cover" effect, they repair worn areas and reduce additional friction losses caused by excessive surface roughness. 3. Graphene has an extremely high thermal conductivity (approximately 5300 W / m·K), which can quickly dissipate frictional heat, preventing lubricating film failure caused by localized high temperatures and further maintaining the long-term stability of friction reduction performance.

[0043] In some embodiments, the anti-swelling agent is dihydroxysuccinic acid. Dihydroxysuccinic acid (also known as tartaric acid, HOOC-CHOH-CHOH-COOH) is an organic acid containing multiple hydroxyl groups. The core advantages of choosing it as an anti-swelling agent are: Adjusting polarity matching: The rubber seals in the clutch system (such as EPDM) are non-polar or weakly polar materials, while the base fluid (such as triethylene glycol monomethyl ether triester of borate) is a polar liquid. The addition of dihydroxysuccinic acid increases the overall polarity of the base fluid, increasing the polarity gap with the rubber, thereby inhibiting the base fluid from swelling the rubber. Stabilize the mechanical properties of rubber: Rubber swelling will lead to a decrease in hardness and elasticity. Dihydroxysuccinic acid inhibits rubber swelling, maintains the rubber's compression permanent set rate, and avoids hydraulic leakage caused by seal failure.

[0044] In some embodiments, the base fluid is composed of triethylene glycol monomethyl ether triester borate and propylene glycol, wherein the triethylene glycol monomethyl ether triester borate accounts for 75% to 85% of the total mass of the clutch boosting fluid. Preferably, the triethylene glycol monomethyl ether triester borate accounts for 77% to 80% of the total mass of the clutch boosting fluid; more preferably, the triethylene glycol monomethyl ether triester borate accounts for 78% to 79% of the total mass of the clutch boosting fluid.

[0045] In a second aspect, the present invention provides a method for preparing a clutch booster fluid, comprising the following steps: Prepare the ingredients for clutch booster fluid as described above; First, triethylene glycol monomethyl ether triester borate and propylene glycol are mixed evenly to prepare a base liquid; Add nano friction reducer to the base fluid and disperse evenly at high speed; then add antioxidant, anti-corrosion slow-release agent, and anti-rubber swelling agent and stir evenly; finally add viscosity adjuster, acidity adjuster and defoamer and stir evenly; filter to remove impurities to obtain clutch booster fluid.

[0046] In some embodiments, the stirring speed for high-speed dispersion is ≥500 rbm, in order to break up the graphene and avoid agglomeration.

[0047] In some embodiments, filtration is performed using a filter with a pore size of 5 μm or less to remove undissolved raw materials and impurities, preferably a filter with a pore size of 3-5 μm.

[0048] In a third aspect, the present invention provides the use of the aforementioned clutch booster fluid in a hydraulically operated clutch. By adding the aforementioned clutch booster fluid to a hydraulically operated clutch, users can achieve a mileage of 40,000 to 50,000 kilometers, or three years, without having to replace the clutch booster fluid. This also improves clutch operation, enhances torque transmission capacity, and provides smoother starting and shifting. It also reduces clutch system failures and ensures complete clutch disengagement.

[0049] In some embodiments, the hydraulically operated clutch is an automotive clutch; preferably, the automotive clutch is a commercial vehicle clutch. The clutch booster fluid provided by the present invention is designed specifically for commercial vehicle clutches and can be used in hydraulically operated clutches of ordinary automobiles or other mechanical equipment, which have lower requirements than commercial vehicle clutch booster fluid.

[0050] In a fourth aspect, the present invention provides a clutch system comprising a hydraulically operated clutch and the aforementioned clutch booster fluid, the clutch booster fluid being installed in the hydraulically operated clutch. The combination of a hydraulically operated clutch and the aforementioned clutch booster fluid results in a clutch system that offers significantly improved operating comfort and greater ease of use over the long term; significantly extended durability and reduced lifecycle costs; enhanced reliability and improved stability under complex operating conditions; and more efficient power transmission adapted to the large displacement and high torque requirements of commercial vehicles.

[0051] In a fifth aspect, the present invention provides a car, comprising a clutch system, comprising a hydraulically operated clutch and the above-mentioned clutch boosting fluid, wherein the above-mentioned clutch boosting fluid is installed in the hydraulically operated clutch. The pedal operation of the car adopting the above-mentioned clutch system is light and stable, and remains stable after long-term use; the boosting fluid replacement cycle and the life of the clutch core components are relatively long, and the maintenance cost is low; it has strong adaptability and efficient power transmission under extreme temperatures; it has high torque transmission efficiency and stable high torque bearing; it has guaranteed separation thoroughness and strong operational stability. Preferably, the car is a commercial vehicle; more preferably, the commercial vehicle is a commercial vehicle with a brake fluid replacement cycle of 40,000 to 50,000 kilometers or 3 years. The clutch boosting fluid provided by the present invention is designed for commercial vehicle clutches and can be used for clutches of ordinary cars that have lower requirements than commercial vehicle clutch boosting fluids.

[0052] The technical solution of the present invention is described in detail below through specific examples. The components used in the examples are as follows: The viscosity modifier is polyethylene glycol monomethyl ether (MPEG-200).

[0053] The defoamer used was FOAM BAN®1875 low-viscosity three-dimensional silicone defoamer, purchased from Mengqingxin Additive Trading (Shanghai) Co., Ltd.

[0054] Examples 1-2: Preparation of Automobile Clutch Booster Fluid 1. Prepare the raw materials according to the specific ingredients and mass percentages shown in Table 1.

[0055] 2. Evenly mix triethylene glycol monomethyl ether triester borate and propylene glycol to prepare a base liquid.

[0056] 3. Add nano friction reducer to the base liquid, stir at high speed for a period of time, then add antioxidant, anti-corrosion slow-release agent, anti-rubber swelling agent in turn, stir for a period of time, then add viscosity adjuster, acidity adjuster and defoaming agent, stir for 1 hour, filter through 5μm mesh, and you will get the automobile clutch booster fluid.

[0057] Table 1

[0058] Table 2

[0059] The performance of the clutch boosting fluids prepared in Example 1 and Example 2 was investigated. The test methods and test results are shown in Table 3.

[0060] Table 3 Comparison of physical and chemical simulation and bench test performance of clutch booster fluid and DOT3 brake fluid in the embodiment

[0061] A comparison of the data in Table 3 shows that the clutch booster fluid prepared in the present invention is significantly superior to DOT3 brake fluid in terms of friction reduction and durability: their friction coefficients are 0.047 N / m² (Example 1) and 0.059 N / m² (Example 2), respectively, both much lower than the 0.245 N / m² of DOT3 brake fluid; and both passed the durability test 2 million times, while DOT3 brake fluid only passed 610,000 times.

[0062] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0063] It should be noted that, in the present invention, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly specified.

[0064] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A clutch booster fluid, characterized by: The clutch booster fluid is composed of the following components in percentage by mass: Nano friction reducer: 0.5%~1.5%; Antioxidant: 1%~3%; Antiseptic sustained-release agent: 0.3%~0.7%; Anti-rubber swelling agent: 1%~5%; Viscosity adjuster: 2%~5%; Acidity adjuster: 0.45%~0.75%; Defoaming agent: 0.005%~0.015%; The balance is base liquid; The pH value of the clutch power-assisting fluid is weakly alkaline.

2. The clutch booster fluid according to claim 1, characterized in that: The clutch booster fluid is composed of the following components in percentage by mass: Nano friction reducer 0.7%~1.1%; Antioxidant: 1.7%~2.1%; Preservative sustained-release agent: 0.45%~0.65%; Anti-rubber swelling agent: 3.40%~3.90%; Viscosity adjuster: 3.00%~4.50%; Acidity adjuster: 0.48%~0.60%; Defoaming agent: 0.008%~0.012%; The balance is base liquid; The pH value of the clutch boosting fluid is 8-9.

3. The clutch booster fluid according to claim 1, characterized in that: The antioxidant is a hindered phenol antioxidant; and / or, The nano friction reducer is graphene powder; and / or, The acidity regulator is triethanolamine; and / or The antiseptic sustained-release agent is methylbenzotriazole; and / or, The anti-rubber swelling agent is dihydroxysuccinic acid; and / or, The viscosity modifier is polyethylene glycol monomethyl ether; and / or, The defoamer is a low-viscosity three-dimensional silicone defoamer.

4. The clutch booster fluid according to claim 3, characterized in that: The hindered phenol antioxidant is 2,6-di-tert-butyl-p-cresol.

5. The clutch booster fluid according to claim 1, characterized in that: The base fluid consists of triethylene glycol monomethyl ether triester borate and propylene glycol, wherein the triethylene glycol monomethyl ether triester borate accounts for 75% to 85% of the total mass of the clutch boosting fluid.

6. The clutch booster fluid according to claim 5, characterized in that: The kinematic viscosity of the base liquid at -40°C is less than 900 mm 2 / s.

7. A method for preparing a clutch booster fluid, characterized in that: The following steps are involved: Prepare the raw materials for the clutch booster fluid according to any one of claims 1 to 6; Mix triethylene glycol monomethyl ether triester of borate and propylene glycol and stir evenly to prepare a base liquid; Add nano friction reducer to the base fluid and disperse evenly at high speed; then add antioxidant, anti-corrosion slow-release agent, and anti-rubber swelling agent and stir evenly; finally add viscosity adjuster, acidity adjuster and defoamer and stir evenly; filter to remove impurities to obtain clutch booster fluid.

8. Use of the clutch boosting fluid according to any one of claims 1 to 6 in a hydraulically operated clutch.

9. A clutch system, characterized in that: The clutch system includes a hydraulically operated clutch and the clutch boosting fluid according to any one of claims 1 to 6, and the clutch boosting fluid is installed in the hydraulically operated clutch.

10. An automobile, characterized in that: The automobile includes a clutch system, which includes a hydraulically operated clutch and the clutch boosting fluid according to any one of claims 1 to 6, wherein the clutch boosting fluid is installed in the hydraulically operated clutch.

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