Transmission liquid composition for stepless speed gear

Abstract

The invention provides a stepless variable device transmission fluide compound. It comprises following components with their percentage on base oil weight: (1) bicyclo alicyclic hydrocarbon base oil, (2) alkali metal salt detersive, 0.05- 3%, (3) ashless dispersant 1- 15%, (4) phenol or amine anti- oxidant, 0.01- 1%, (5) antiwear agent, 0.05- 2%, (6) friction improver. 0.05- 3%, (7) viscosity index improver, 0-20%, (8) antifoam agent, 0- 1000ppm. The transmission fluide is characterized by good viscosity-temperature characteristic and low- temperature flowability, high drag coefficient at normal temperature, good comprehensive performance, and satification for CVT use requirement.

Description

technical field

[0001] The invention relates to a lubricating oil composition, in particular to a CVT special-purpose transmission fluid composition with high viscosity index and high traction coefficient and excellent performance. technical background

[0002] In recent years, improving fuel economy, reducing emissions, and improving handling flexibility have become the development trend of automobile development, and the technology of continuously variable transmission (CVT for short) is one of the most promising. Common types of CVT for vehicles are: Belt CVT (Belt / Chain-CVT, B-CVT) and Ring CVT (Torodial-CVT, T-CVT). CVT technology has significant advantages in terms of fuel economy, overtaking acceleration, ride comfort, and cost. Therefore, more and more automatic transmissions of automobiles adopt CVT design.

[0003] The transmission of CVT power actually depends on the shearing force of the oil film in the contact area of ​​elastohydrodynamic lubrication (EHL). Th...

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