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Lubricant composition, method for producing lubricant composition, and continuously variable transmission

A lubricating oil composition and composition technology, applied in the direction of lubricating compositions, petroleum industry, transmission devices, etc., can solve the problems that are difficult to balance, and achieve the effects of high flash point, excellent low-temperature fluidity, and high traction coefficient

Active Publication Date: 2020-04-17
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For lubricating oil compositions used in traction-driven transmissions, from the viewpoint of ensuring high torque transmission capability, high temperature conditions are required (for example, if For automotive applications, a high traction coefficient of about 120°C is required. At the same time, in order to ensure low-temperature startability in cold regions such as North America and Northern Europe, low viscosity is required even at low temperatures (for example, about -40°C). Low temperature fluidity, but these properties are opposite properties, so it is difficult to balance

Method used

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  • Lubricant composition, method for producing lubricant composition, and continuously variable transmission
  • Lubricant composition, method for producing lubricant composition, and continuously variable transmission
  • Lubricant composition, method for producing lubricant composition, and continuously variable transmission

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Embodiment

[0079] Next, the present invention will be described more specifically by way of examples, but the present invention is not limited by these examples.

[0080] The properties and performance of the lubricating oil composition were measured by the following methods.

[0081] (1) Kinematic viscosity

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PUM

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Abstract

Provided are: a lubricant composition which has a good balance between a high traction coefficient and excellent fluidity at low temperatures at high levels, while having a high flash point, and whichcontains (a) a naphthenic synthetic oil having a flash point of 140 DEG C or higher and (b) an ester having a branched chain and 5-32 carbon atoms so that the content of the naphthenic synthetic oil(a) is 35% by mass or more but less than 80% by mass based on the total amount of the composition; a method for producing this lubricant composition; and a continuously variable transmission which uses this lubricant composition.

Description

technical field [0001] The present invention relates to a lubricating oil composition, a method for producing the lubricating oil composition, and a continuously variable transmission. Background technique [0002] Continuously variable transmissions, especially traction drive transmissions, are smaller and lighter than transmissions using gears, and can change gears without metal-to-metal contact, so they are less likely to generate noise. Therefore, traction-driven transmissions are being studied especially for applications centered on electric vehicles. [0003] For lubricating oil compositions used in traction-driven transmissions, a high traction coefficient is required under high temperature conditions (for example, about 120° C. for automotive applications) from the viewpoint of securing a large torque transmission capability, and at the same time , in order to ensure low-temperature startability in cold regions such as North America and Northern Europe, low-temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M111/02F16H15/00C10M105/04C10M105/32C10M105/34C10M105/38C10N20/00C10N20/02C10N30/02C10N30/06C10N40/04
CPCC10M169/04F16H15/00C10M111/02C10N2040/045C10N2030/74C10N2020/071C10N2030/02C10N2030/06C10M2203/045C10M2207/283C10M2207/2835C10M2207/2815C10M2207/2825C10M105/04C10M105/34C10M105/38C10M2203/04C10M2203/065C10M2207/2805C10N2040/04
Inventor 砂川洋二岩崎猛
Owner IDEMITSU KOSAN CO LTD
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