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Manual transmission lubricating oil composition

A technology of lubricating oil composition and manual transmission, applied in lubricating composition, petroleum industry, etc., to achieve the effect of excellent low temperature performance, excellent shear resistance stability, and good antirust performance

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this composition cannot well meet the friction characteristics requirements of the current manual gearbox with synchronizer and the requirement for the viscosity shear drop of the gearbox oil under long-term use.

Method used

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  • Manual transmission lubricating oil composition
  • Manual transmission lubricating oil composition
  • Manual transmission lubricating oil composition

Examples

Experimental program
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Effect test

Embodiment 1-5

[0057] According to the latest SAE J306 vehicle gear lubricant viscosity classification for vehicle transmission including the viscosity specification requirements of manual transmission oil, the embodiments of manual transmission lubricating oil compositions with 75W / 80 and 75W / 85 viscosity levels are determined, wherein the embodiment Examples 1 to 3 are 75W / 80 viscosity grades, and Examples 4 and 5 are 75W / 85 viscosity grades. The specific components and product performance of the composition are shown in Table 2.

[0058] The preparation method of the manual gearbox lubricating oil composition of this example is as follows: first add base oil, viscosity index improver, and pour point depressant according to the ratio in the table, heat up to 70°C for heating and stirring, and after maintaining for 2 hours, lower the temperature to 40°C; add other ingredients and stir for 3 hours until the mixture is completely dissolved and becomes transparent.

[0059] Table 2

[0060] ...

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Abstract

The invention provides a manual transmission lubricating oil composition. The manual transmission lubricating oil composition comprises (a) at least one mineral oil and / or synthetic oil with high viscosity index, (b) at least one viscosity index improving agent, (c) at least one pour point depressant, (d) at least one phosphorus-containing antiwear agent, (e) at least one sulfur-containing extreme pressure agent, (f) at least one friction improving agent, (g) at least one clean dispersion agent, (h) at least one antioxidant, (i) at least one antirust agent, (j) at least one metal deactivator and (k) at least one anti-foaming agent. The manual transmission lubricating oil composition provided by the invention meets the vehicle gear oil viscosity level of 75W / 80 or 75W / 85, has excellent high-low temperature performances, anticorrosion performance, antirust performance and shearing-resistance performance, especially has excellent synchronizer friction performance, can be used for a manual transmission with a synchronizer, and can be completely suitable for the improvement of oil product performance requirement brought about by technique improvement of the manual transmission at present.

Description

technical field [0001] The invention relates to a lubricating oil for a manual transmission of an automobile, in particular to a lubricating oil suitable for a manual transmission in a low temperature state. Background technique [0002] For the lubrication of automobile manual transmissions, API GL-4 grade oils are generally used, also known as medium-duty vehicle gear oils, this grade of products is suitable for the lubrication of spiral bevel gears and hypoid gears with relatively slow working conditions. Since the bench device for evaluating products of this grade is no longer produced, the international common practice for its product design is to use the same compounding agent as the API GL-5 product, and the dosage is halved for preparation. If API GL-4 products are used in the manual transmission of the vehicle, it is mainly for the lubrication of the gears of the transmission, and there is no targeted method for evaluating oil products, and the performance of the oi...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N40/04
Inventor 水琳徐魏薛玉苓周轶张国茹章晶申宝武谭海港宋朝新
Owner CHINA PETROLEUM & CHEM CORP
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