Multi-gear gearbox lubricating oil composition as well as preparation method and application thereof

By adding trimethylolpropane tris(1H-imidazolium-1-acetic acid) crosslinking agent to multi-speed transmission lubricating oil and optimizing the formula, the problems of load-bearing capacity and friction durability of wet clutch multi-speed transmissions are solved, achieving high efficiency of lubricating oil friction durability and extension of hardware life.

CN121991745APending Publication Date: 2026-05-08PETROCHINA CO LTD
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Patent Information

Application Number
CN202411575401.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing technologies have failed to effectively solve the problems of load-bearing capacity and friction durability of wet clutch multi-speed transmissions, resulting in insufficient hardware lifespan and driving range.

Method used

Trimethylolpropane tris(1H-imidazolium-1-acetate) is used as a crosslinking agent, combined with a specific proportion of viscosity index improvers, detergents, dispersants, extreme pressure anti-wear agents, rust inhibitors, antioxidants, metal passivators, and antifoaming agents, and blended with base oil to form a multi-speed transmission lubricating oil composition, which enhances the oil's anti-wear ability and reduces the coefficient of friction.

Benefits of technology

It improves the frictional durability and wear resistance of the lubricating oil, extends the service life of hardware and driving range, and meets the lubrication requirements of multi-speed transmissions.

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Abstract

The invention belongs to the field of lubricating oil, and particularly relates to a multi-gear gearbox lubricating oil composition as well as a preparation method and application thereof. The multi-gear gearbox lubricating oil composition is prepared from the following raw materials in percentage by mass: 2.0 percent to 4.5 percent of a viscosity index improver, 0.01 percent to 0.08 percent of a clearing agent, 4.5 percent to 7.0 percent of a dispersing agent, 0.3 percent to 1.0 percent of an anti-wear reagent at extreme pressure, 0.05 percent to 0.3 percent of an anti-rust agent, 0.3 percent to 1.5 percent of an antioxidant, 0.01 percent to 0.2 percent of a metal deactivator, 0.3 percent to 1.5 percent of a cross-linking agent, 0.01 percent to 0.03 percent of an anti-foaming agent and the balance of base oil. The cross-linking agent of the composition adopts trimethylolpropane tri (1H-imidazole-1-acetate), so that the wear resistance of an oil product is effectively enhanced, the friction coefficient is reduced, and the friction durability is improved, thereby achieving the effects of prolonging the endurance mileage and prolonging the service life of hardware.
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