Lubricating oil composition for electric vehicle gearbox and preparation method of lubricating oil composition

A lubricating oil composition and electric vehicle technology, applied in the field of lubricating oil, can solve the problem of oil-to-seal, low-temperature rheological electric electromagnetic compatibility, and can not provide anti-extreme pressure gear protection oil viscosity retention, Can not meet the problems of two-stage or multi-stage gearboxes, etc., to achieve excellent bearing and gear extreme pressure protection and anti-pitting corrosion protection, excellent thermal oxidation stability, and improve the effect of cleaning and dispersing performance
CN107828481AActive Publication Date: 2018-03-23JIANGSU LOPALTECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU LOPALTECH
Publication Date
2018-03-23

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Abstract

The invention discloses a lubricating oil composition for an electric vehicle gearbox and a preparation method of the lubricating oil composition. The composition is prepared from the following components in percentages by weight: 79.8 to 84.5% of base oil, 4 to 7% of polymethacrylate viscosity index improver, 10 to 13% of special complexing agent for transmission oil and 0.3 to 0.5% of pour pointdepressant, wherein the polymethacrylate viscosity index improver is a comb-shaped polymer, and a shear stability index of the polymethacrylate viscosity index improver KRL 20h is not greater than 28. The lubricating oil composition for the electric vehicle gearbox and the preparation method have the advantages that prepared oil maintains viscosity unchanged under long-term high-speed shearing force, provides reliable protection for the electric vehicle gearbox, has excellent shear stability, outstanding low-temperature rheological property, and capability of greatly increasing high-temperature thickening ability of the oil with low dosage, has good dispersibility, can reduce deposition of oil oxides, and can be used together with a special complexing agent for gearbox to improve cleaningand dispersion performance of the oil.
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Description

technical field

[0001] The invention belongs to the field of lubricating oil, and in particular relates to a lubricating oil composition for an electric vehicle gearbox and a preparation method thereof. Background technique

[0002] The electric vehicle industry is a rapidly developing emerging industry, with different levels of development at home and abroad. The industry is still immature and not standardized. The technology is constantly seeking improvement and breakthroughs, and relevant policies are also being adjusted. According to different technical routes, electric vehicles can be divided into traditional (oil-electric / gas-electric) hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), pure electric vehicles (AEV) and fuel cell vehicles (FCV). Electric vehicles will become the inevitable trend of the development of my country's automobile industry, and also the main direction of future transformation and development of the automobile industry. ...

Claims

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