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Lubricating oil composition for manual transmission of cargo truck with synchronizing ring

A technology of lubricating oil composition and manual gearbox, which is applied in the direction of lubricating composition, petroleum industry, etc., can solve the requirement of synchronizing ring friction performance without the wear amount of synchronizing ring accessories, affecting the design margin of the gearbox, and the failure of the gearbox, etc. problems, to achieve good energy-saving effect, improve fuel economy, and prolong service life.

Inactive Publication Date: 2014-11-19
安徽中天石化股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coupled with the ever-increasing requirements of users for vehicle power, economy, comfort, and social environmental protection, it is difficult to meet customer requirements if the vehicle manual transmission still uses API GL-4 grade vehicle gear oil. Manual transmission Although oil MT-1 has improved thermal oxidation stability and adaptability to sealing materials on the basis of GL-4, it has no requirements for the wear amount of the synchronous ring accessories and the friction performance of the synchronous ring
The friction characteristic is a key index of manual transmission oil with synchronous ring. When the friction characteristic value changes by more than 30%, it will directly affect the design margin of the gearbox, resulting in shifting tremors, screaming and harsh sounds, and even causing the gearbox to Various potential problems such as failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A special lubricating oil composition for a manual gearbox of a truck with a synchronizing ring, which comprises the following components by weight ratio:

[0030] 68 parts of hydrotreated base oil, 15 parts of synthetic oil PAO and 15 parts of polymethacrylate mixture with number average molecular weight of 19000~21000;

[0031] 0.7 parts of sulfurized isobutylene;

[0032] 0.3 parts of dialkyl dithiocarboxylate amine salt;

[0033] 0.3 parts of phosphite;

[0034] 0.2 parts of dithiocarbamate;

[0035] 0.15 parts of high base value calcium sulfonate;

[0036] 0.25 parts of polyisobutylene mono-succinimide;

[0037] 0.1 parts of zinc dialkyldithiophosphate.

[0038] In this example, the phosphorus content of phosphite is >6%, and its molecular formula (RO)P 2 -OH, where R is an alkyl group containing 18 to 33 carbon atoms; the sulfurized isobutylene has an S content greater than 40%, and has low odor; the dialkyldithiodouble ester amine salt has a P content great...

Embodiment 2

[0041] 70 parts of hydrotreated base oil, 12 parts of synthetic oil PAO and 16 parts of polymethacrylate mixture with number average molecular weight of 19000~21000;

[0042] 0.8 parts of sulfurized isobutylene;

[0043] 0.3 parts of dialkyl dithiocarboxylate amine salt;

[0044] 0.2 parts of phosphite;

[0045] 0.1 part of dithiocarbamate;

[0046] 0.2 parts of high base value calcium sulfonate;

[0047] 0.25 parts of polyisobutylene mono-succinimide;

[0048] 0.15 parts of zinc dialkyldithiophosphate.

[0049] In this example, the phosphorus content of phosphite is >6%, and its molecular formula (RO)P 2 -OH, where R is an alkyl group containing 18 to 33 carbon atoms; the sulfurized isobutylene has an S content greater than 40%, and has low odor; the dialkyldithiodouble ester amine salt has a P content greater than 8.5 %; the polyisobutylene monosuccinimide, the N content is greater than 1.5%; the dithiocarbamate, the S content is greater than 30%; the zinc dialkyldithiop...

Embodiment 3

[0052] 67.9 parts of hydrotreated base oil, 14 parts of synthetic oil PAO and 16 parts of polymethacrylate mixture with number average molecular weight of 19000~21000;

[0053] 0.8 parts of sulfurized isobutylene;

[0054] 0.2 parts of dialkyl dithiocarboxylate amine salt;

[0055] 0.25 parts of phosphite;

[0056] 0.25 parts of dithiocarbamate;

[0057] 0.15 parts of high base value calcium sulfonate;

[0058] 0.3 parts of polyisobutylene mono-succinimide;

[0059] 0.15 parts of zinc dialkyldithiophosphate.

[0060] In this example, the phosphorus content of phosphite is >6%, and its molecular formula (RO)P 2 -OH, where R is an alkyl group containing 18 to 33 carbon atoms; the sulfurized isobutylene has an S content greater than 40%, and has low odor; the dialkyldithiodouble ester amine salt has a P content greater than 8.5 %; the polyisobutylene monosuccinimide, the N content is greater than 1.5%; the dithiocarbamate, the S content is greater than 30%; the zinc dialkyl...

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Abstract

The invention relates to a lubricating oil composition for a manual transmission of a cargo truck with a synchronizing ring, which comprises the following ingredients by weight proportion: 60-80 parts of hydrotreatment base oil, 10-20 parts of synthetic oil PAO and 15-20 parts of polymethacrylate mixture with number-average molecular weight of 19000-21000, 0.5-0.8 parts of sulfurized isobutylene, 0.2-0.3 parts of dialkyl dithio ester amine salt, 0.2-0.5 parts of phosphite ester, 0.1-0.3 parts of dithiocarbamate; 0.1-0.3 parts of high base number calcium sulfonate, 0.1-0.3 parts of polyisobutylene succinimide, and 0.05-0.2 parts of zinc dialkyl dithiophosphate. The lubricating oil composition has good high temperature stability, excellent gear and bearing protection performance, and specific friction performance for specific synchronizer material; brings long-term oil change period, fuel economy and waste oil processing amount reduction, and has benefit for environmental protection and continuous development.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a special lubricating oil composition for a manual gearbox of a truck with a synchronizing ring. Background technique [0002] The gear shifting of the old-fashioned gearbox should use the "two-leg clutch" method, and the upshift should stay in the neutral position for a while, and the downshift should be in the neutral position, so as to reduce the speed difference of the gears. However, this operation is relatively complicated, and it is difficult for the driver to accurately grasp it. The emergence of the "synchronizer" has solved this problem. A new generation of manual transmission vehicles generally use a gearbox with a synchronizer, through which the gears to be meshed can reach a consistent speed and mesh smoothly. The synchronizer is a copper product, which has strict requirements on the corrosion resistance of the oil. The GL-5 gear oil with more sulfur and phosphorus e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/04
Inventor 高晓谋王成功
Owner 安徽中天石化股份有限公司
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