A reinforcing agent, hydraulic transmission oil and vehicle automatic transmission

Abstract

The present invention provides a reinforcing agent, a hydraulic transmission oil and a vehicle transmission. The reinforcing agent of the present invention comprises, by mass percentage, 10-15% of a dispersant; 70-80% of an ionic liquid; and the rest being a base oil; wherein the ionic liquid comprises a structure of Formula 1. The reinforcing agent of the present invention is not only simple in composition and environmentally friendly, but also, when used to prepare the hydraulic transmission oil, enables the hydraulic transmission oil to still have relatively excellent friction performance after multiple cycles.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oils, and in particular to a reinforcing agent, a hydraulic transmission oil and a vehicle transmission. Background Art

[0002] Hydraulic transmission oil is also called automatic transmission fluid (ATF) or automatic transmission oil. As a working medium, hydraulic transmission oil is often used in vehicle automatic transmissions consisting of a torque converter, a hydraulic coupling and a mechanical transmission. It plays a role in transmitting energy in the vehicle transmission through the kinetic energy of the liquid.

[0003] Friction performance is the core performance of hydraulic transmission oil, which mainly affects the shifting feel of engineering machinery drivers. The international OEM specifications use the SAE No2 friction tester to evaluate the friction performance of hydraulic transmission oil, mainly examining the maximum dynamic friction coefficient, mid-point dynamic friction coefficient, braking time, and friction cycle number of hydraulic transmission oil products.

[0004] However, there are currently no reinforcing agents for improving the friction properties of hydraulic transmission oils. Summary of the invention

[0005] The invention provides a reinforcing agent, which is not only simple in composition and environmentally friendly, but also can make the hydraulic transmission oil still have relatively excellent friction performance after multiple cycles when used for preparing the hydraulic transmission oil.

[0006] The present invention provides a hydraulic transmission oil. Since the hydraulic transmission oil comprises the above-mentioned reinforcing agent, it is not only simple in composition and environmentally friendly, but also still has relatively excellent friction performance after being circulated for many times.

[0007] The present invention provides a vehicle transmission. Since its working medium includes the above-mentioned hydraulic transmission oil, in actual application, it is not easy to have obvious jerkiness or slippage during gear shifting, and the service life is long.

[0008] The present invention provides a reinforcing agent, which comprises, by weight percentage:

[0009] Dispersant 10-15%;

[0010] Ionic liquid 70-80%;

[0011] The rest is base oil;

[0012] Wherein, the ionic liquid comprises a structure of Formula 1:

[0013]

[0014] Wherein, n is a positive integer selected from 4-9.

[0015] The reinforcing agent as described above, wherein the content by mass percentage includes:

[0016] Dispersant 12-14%;

[0017] Ionic liquids 74-78%;

[0018] The rest is base oil.

[0019] The reinforcing agent as described above, wherein the dispersant is selected from at least one of monosuccinimide, boronated succinimide and bissuccinimide.

[0020] The reinforcing agent as described above, wherein the ionic liquid is

[0021]

[0022] The reinforcing agent as described above, wherein the base oil is a Group I base oil.

[0023] The reinforcing agent as described above, wherein the kinematic viscosity of the base oil is 4.5-5.5 cSt.

[0024] The present invention also provides a hydraulic transmission oil, comprising the reinforcing agent as described above.

[0025] The hydraulic transmission oil as described above, wherein the mass percentage of the reinforcing agent is 0.8-1.2% based on the total mass of the hydraulic transmission oil.

[0026] The hydraulic transmission oil as described above, wherein the hydraulic transmission oil also includes No. 8 hydraulic transmission oil.

[0027] The present invention provides a vehicle automatic transmission, wherein the vehicle automatic transmission includes the hydraulic transmission oil as described above.

[0028] The present invention provides a reinforcing agent, which includes a specific content of an ionic liquid, a dispersant and a base oil, and the ionic liquid includes a structure of Formula 1. Since the ionic liquid constituting the reinforcing agent includes the structure of Formula 1, when the reinforcing agent is used to prepare a hydraulic transmission oil, the hydraulic transmission oil can still have relatively excellent friction performance after multiple cycles; and the ionic liquid also has the advantage of excellent solubility, and can be relatively well compatible with other components, further improving the friction performance of the hydraulic transmission oil after multiple cycles. It is worth mentioning that the reinforcing agent prepared using the ionic liquid not only has simple components and is convenient for industrial application, but also has relatively excellent environmental friendliness.

[0029] The hydraulic transmission oil of the present invention, because it includes the above-mentioned reinforcing agent, is not only simple in composition and environmentally friendly, but also still has relatively excellent friction performance after multiple cycles, and has relatively broad application prospects.

[0030] The vehicle automatic transmission of the present invention, since its working medium includes the above-mentioned hydraulic transmission oil, is not prone to gear shift slippage during actual application, is not prone to obvious jerkiness during gear shifting, and can provide a long life of effective gear shifting. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The first aspect of the present invention provides a reinforcing agent, which comprises, by weight percentage:

[0033] Dispersant 10-15%;

[0034] Ionic liquid 70-80%;

[0035] The rest is base oil;

[0036] Wherein, the ionic liquid comprises a structure of Formula 1:

[0037]

[0038] Wherein, n is a positive integer selected from 4-9.

[0039] The present invention does not limit the specific source of the ionic liquid, and the ionic liquid can be prepared by a preparation method commonly used in the art.

[0040] The present invention does not specifically limit the dispersant and the base oil, and they can be selected from the commonly used dispersants and base oils in the art. For example, the dispersant can be selected from at least one of a boronized dispersant and a non-boronized dispersant.

[0041] In the present invention, the reinforcing agent includes a structure of Formula 1. On the one hand, the main component of the reinforcing agent is the ionic liquid shown in Formula 1, so it can show excellent compatibility when combined with other components. On the other hand, when the reinforcing agent is used for hydraulic transmission oil, it can significantly reduce the ratio of the arresting time and μo / μd (maximum dynamic friction coefficient to midpoint dynamic friction coefficient) of the hydraulic transmission oil to enhance the friction performance of the liquid transmission oil. Among them, the shorter arresting time can significantly reduce the occurrence of shifting slippage during the operation of the mechanical device, and the smaller μo / μd ratio is conducive to reducing the probability of obvious frustration during the shifting process. In addition, when the reinforcing agent of the present invention is used, as the service life of the mechanical device increases, the arresting time and the ratio of μo / μd still have a good performance, so it also has a considerable effect on extending the service life of the mechanical device. The ionic liquid has good solubility and is a good solvent. It can be well matched with other components. When the reinforcing agent prepared by using the ionic liquid is applied to hydraulic transmission oil, the friction performance of the hydraulic transmission oil can be improved. The hydraulic transmission oil has a short arrest time, and it is not easy to have the phenomenon of gear shifting slip in engineering machinery applications. The ratio of μo / μd (maximum dynamic friction coefficient to midpoint dynamic friction coefficient) of the hydraulic transmission oil is low, and it is not easy to have obvious frustration during the gear shifting process. The number of cycles of the friction test is high, and the life of effective gear shifting is long during the use of engineering machinery. And the hydraulic transmission oil prepared by using the reinforcing agent has a small decrease in friction performance after multiple cycles.

[0042] It is worth mentioning that the reinforcing agent prepared using the ionic liquid not only has simple components and is convenient for industrial application, but also has excellent environmental friendliness.

[0043] The ionic liquid in the present invention can also passivate the metal activity, so the reinforcing agent can also improve the anti-corrosion and anti-rust performance of the hydraulic transmission oil.

[0044] Furthermore, when the reinforcing agent comprises, by mass percentage:

[0045] Dispersant 12-14%;

[0046] Ionic liquids 74-78%;

[0047] When the rest is base oil, the reinforcing agent can make the hydraulic transmission oil have more excellent friction performance and environmental friendliness.

[0048] In the present invention, the raw materials of the ionic liquid, the dispersant and the base oil can be further selected to further improve the compatibility of the raw materials and improve the friction performance and environmental performance of the hydraulic transmission oil.

[0049] In some embodiments of the present invention, the dispersant is selected from at least one of monosuccinimide, boronated succinimide and bissuccinimide.

[0050] In some embodiments of the present invention, when the structure of the ionic liquid is

[0051] When the reinforcing agent is added, the obtained reinforcing agent can make the hydraulic transmission oil have more excellent friction performance and environmental friendliness.

[0052] In some embodiments of the present invention, the base oil is a Group I base oil.

[0053] The present invention does not specifically limit the Class I base oil, and the Class I base oil commonly used in the art can be selected. In some embodiments, in order not to affect the flash point of the hydraulic transmission oil and further improve the friction performance and environmental performance of the hydraulic transmission oil, a Class I base oil with a kinematic viscosity of 4.5-5.5 cSt at 100°C can be selected.

[0054] In the present invention, kinematic viscosity is a measure of the internal friction of a liquid when it flows under gravity, and kinematic viscosity is the ratio of the viscosity of a liquid to the density of the liquid at the same temperature.

[0055] The reinforcing agent in some embodiments of the present invention can be obtained by uniformly mixing the raw materials according to the above composition. The present invention does not specifically limit the order of adding the raw materials, the stirring rate, and the mixing temperature.

[0056] The reinforcing agent of the present invention can not only make the hydraulic transmission oil have both relatively good friction performance and environmental protection performance, but also has simple preparation process, easy operation and wide application range.

[0057] A second aspect of the present invention provides a hydraulic transmission oil comprising the above-mentioned reinforcing agent.

[0058] In the present invention, a certain amount of reinforcing agent is mixed with hydraulic transmission oil to obtain hydraulic transmission oil. The present invention does not specifically limit the hydraulic transmission oil, and it can be any hydraulic transmission oil commonly used in the art.

[0059] Since the hydraulic transmission oil includes the above-mentioned reinforcing agent, the hydraulic transmission oil has both relatively excellent friction performance and environmental protection performance. In actual application, the braking time is short and the ratio of μo / μd (maximum dynamic friction coefficient to midpoint dynamic friction coefficient) is low. It still has high friction performance during long-term use and can be widely used.

[0060] In some embodiments of the present invention, in order to better balance the viscosity and friction performance of the hydraulic transmission oil and broaden the application occasions of the hydraulic transmission oil, the mass percentage of the reinforcing agent is 0.8-1.2% based on the total mass of the hydraulic transmission oil.

[0061] In some embodiments of the present invention, the hydraulic transmission oil further comprises No. 8 hydraulic transmission oil.

[0062] In the present invention, No. 8 hydraulic transmission oil is a hydraulic transmission oil commonly used in the art and is easily available. Using No. 8 hydraulic transmission oil to prepare hydraulic transmission oil can reduce the production cost of hydraulic transmission oil and further broaden the application occasions of hydraulic transmission oil.

[0063] The present invention provides a vehicle automatic transmission, which comprises the above-mentioned hydraulic transmission oil.

[0064] The vehicle automatic transmission of the present invention, since its working medium includes the above-mentioned hydraulic transmission oil, is not prone to gear shift slippage during actual application, is not prone to obvious jerkiness during gear shifting, and can provide a long life of effective gear shifting.

[0065] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0066] The base oil in each embodiment and comparative example is a commercially available Class I base oil, and the kinematic viscosity of the Class I base oil at 100° C. is 5.18 mm 2 / s;

[0067] The No. 8 hydraulic transmission oil in each embodiment and comparative example is a commercially available No. 8 hydraulic transmission oil product.

[0068] Example 1

[0069] The hydraulic transmission oil of this embodiment is obtained by mixing the reinforcing agent shown in Table 1 with No. 8 hydraulic transmission oil;

[0070] Wherein, based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent is 1.2%.

[0071] Table 1

[0072] name Mass percentage / % Ionic Liquids 70 Monosuccinimide 10 Group I base oil 20

[0073] The structural formula of the ionic liquid in Table 1 is

[0074]

[0075] Obtained from commercial sources.

[0076] Example 2

[0077] The composition of the hydraulic transmission oil of this embodiment is substantially the same as that of the hydraulic transmission oil of embodiment 1, except that the reinforcing agent shown in Table 2 is used to replace the reinforcing agent in embodiment 1.

[0078] Table 2

[0079] name Mass percentage / % Ionic Liquids 80 Boronated Succinimide 10 Group I base oil 10

[0080] Example 3

[0081] The composition of the hydraulic transmission oil of this embodiment is substantially the same as that of the hydraulic transmission oil of embodiment 1, except that the reinforcing agent shown in Table 3 is used to replace the reinforcing agent in embodiment 1.

[0082] Table 3

[0083] name Mass percentage / % Ionic Liquids 70 Bisuccinimide 15 Group I base oil 15

[0084] Example 4

[0085] The composition of the hydraulic transmission oil of this embodiment is substantially the same as that of the hydraulic transmission oil of embodiment 1, except that the reinforcing agent shown in Table 4 is used to replace the reinforcing agent in embodiment 1.

[0086] Table 4

[0087] name Mass percentage / % Ionic Liquids 80 Boronated Succinimide 7 Bisuccinimide 8 Group I base oil 5

[0088] Example 5

[0089] The composition of the hydraulic transmission oil of this embodiment is substantially the same as that of the hydraulic transmission oil of embodiment 1, except that the reinforcing agent shown in Table 5 is used to replace the reinforcing agent in embodiment 1.

[0090] Table 5

[0091] name Mass percentage / % Ionic Liquids 76 Monosuccinimide 14 Group I base oil 10

[0092] Example 6

[0093] The composition of the hydraulic transmission oil of this embodiment is substantially the same as that of the hydraulic transmission oil of embodiment 1, except that:

[0094] The structural formula of the ionic liquid in the reinforcing agent is

[0095] Obtained from commercial sources.

[0096] Example 7

[0097] The composition of the hydraulic transmission oil of this embodiment is substantially the same as that of the hydraulic transmission oil of embodiment 1, except that:

[0098] The structural formula of the ionic liquid in the reinforcing agent is

[0099] Obtained from commercial sources.

[0100] Example 8

[0101] The composition of the hydraulic transmission oil of this embodiment is substantially the same as that of the hydraulic transmission oil of Embodiment 1, except that the mass percentage of the reinforcing agent is 0.5% based on the total mass of the hydraulic transmission oil.

[0102] Comparative Example 1

[0103] The composition of the hydraulic transmission oil of this comparative example is substantially the same as that of the hydraulic transmission oil of Example 1, except that:

[0104] The structural formula of the ionic liquid in the reinforcing agent is

[0105] Obtained from commercial sources.

[0106] Comparative Example 2

[0107] The composition of the hydraulic transmission oil of this comparative example is substantially the same as that of the hydraulic transmission oil of Example 1, except that the reinforcing agent shown in Table 6 is used to replace the reinforcing agent in Example 1.

[0108] Table 6

[0109] name Mass percentage / % Ionic Liquids 85 Monosuccinimide 5 Group I base oil 10

[0110] Comparative Example 3

[0111] The composition of the hydraulic transmission oil of this comparative example is substantially the same as that of the hydraulic transmission oil of Example 1, except that:

[0112] The structural formula of the ionic liquid in the reinforcing agent is

[0113]

[0114] Obtained from commercial sources.

[0115] Performance Characterization

[0116] The friction performance of No. 8 hydraulic transmission oil, the hydraulic transmission oil in the embodiment and the comparative example was tested respectively by using SAE No2 friction tester and JASO M348 method, and the test was terminated when the stopping time exceeded 1 second.

[0117] 1. The specific test data of No. 8 hydraulic transmission oil are shown in Table 7. In Table 7, μo / μd is the ratio of the maximum dynamic friction coefficient to the midpoint dynamic friction coefficient.

[0118] Table 7

[0119]

[0120] 2. Product 1. Specific test data of the hydraulic transmission oil in the embodiments and comparative examples are shown in Table 8. In Table 8, μo / μd is the ratio of the maximum dynamic friction coefficient to the midpoint dynamic friction coefficient.

[0121] Table 8

[0122]

[0123]

[0124] It can be seen from Table 8 that the hydraulic transmission oil obtained in the embodiment of the present invention has relatively excellent friction performance, which is reflected in that after 5000 cycles, it still has a smaller ratio of the maximum dynamic friction coefficient to the midpoint dynamic friction coefficient, and after 5000 cycles, it still has a smaller stopping time.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reinforcing agent, characterized in that: According to the mass percentage, it includes: Dispersant 12-14%; Ionic liquids 74-78%; The rest is base oil; The ionic liquid is: The dispersant is selected from at least one of monosuccinimide, boronated succinimide and bissuccinimide; The base oil is a Class I base oil with a kinematic viscosity of 4.5-5.5 cSt at 100°C.

2. A hydraulic transmission oil, characterized in that: The reinforcing agent according to claim 1 is included.

3. The hydraulic transmission oil according to claim 2, characterized in that: Based on the total mass of the hydraulic transmission oil, the mass percentage of the reinforcing agent is 0.8-1.2%.

4. The hydraulic transmission oil according to claim 3, characterized in that: The hydraulic transmission oil also includes No. 8 hydraulic transmission oil.

5. A vehicle automatic transmission, characterized in that: The vehicle automatic transmission comprises the hydraulic transmission oil according to any one of claims 2-4.

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