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Lubricating oil for non-stage transmission

A technology of continuously variable transmission and lubricating oil, applied in the direction of lubricating composition, petroleum industry, base material, etc., to achieve the effect of good low temperature fluidity and high traction coefficient

Active Publication Date: 2013-03-20
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Recently, however, due to increased awareness of environmental issues, countries are tightening fuel efficiency limits

Method used

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  • Lubricating oil for non-stage transmission
  • Lubricating oil for non-stage transmission
  • Lubricating oil for non-stage transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Preparation of Example 1 Fluid 4

[0112] The fluid A of Preparation Example 4 was mixed with the fluid 1 so that the content of the fluid A was 8 mass % of the total mass, and the fluid 4 was prepared. Table 2 shows the general properties of the fluid 4 and the measurement results of the traction coefficient.

Embodiment 2

[0113] Preparation of Example 2 Fluid 5

[0114] The fluid A of Preparation Example 4 was mixed with the fluid 1 so that the content of the fluid A was 15 mass % of the total mass, and the fluid 5 was prepared. Table 2 shows the general properties of the fluid 5 and the measurement results of the traction coefficient.

Embodiment 3

[0115] Example 3 Preparation of Fluid 6

[0116] The fluid A of Preparation Example 4 was mixed with the fluid 2 so that the content of the fluid A was 8 mass % of the total mass, and the fluid 6 was prepared. The general properties of the fluid 6 and the measurement results of the traction coefficient are shown in Table 2.

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Abstract

Provided is a lubricating oil for continuously variable transmissions characterized by that used as a base oil are a synthetic oil I having the following properties: (a) a traction coefficient at 120°C is 115 % or more of that of 2,4-dicyclohexyl-2-methylpentane, (b) a viscosity at -40°C is not higher than a viscosity (260 Pa·s) of 2,4-dicyclohexyl-2-methylpentane and (c) a viscosity index is 65 or higher and a synthetic oil II having a viscosity of 1 Pa·s or lower at - 40°C and that the above base oil has a specific property. The above lubricating oil is a lubricating oil for continuously variable transmissions which has a high traction coefficient even at high temperature and is endowed with a good low temperature fluidity and which is suited as a lubricating oil for continuously variable transmissions for automobiles.

Description

technical field [0001] The present invention relates to a lubricating oil for continuously variable transmissions, and more specifically, to a lubricating oil suitable for continuously variable transmissions for vehicles that has a high traction coefficient (traction coefficient) even at high temperatures and has good low-temperature fluidity Lubricating oil for continuously variable transmissions. Background technique [0002] Continuously variable transmission (hereinafter sometimes referred to as "CVT"), especially CVT for vehicles, is used in order to achieve sufficient power transmission due to severe operating conditions such as large torque transmission capacity and large temperature fluctuations. Lubricant for continuously variable transmissions It is required to have a high traction coefficient in the operating temperature range. Therefore, since the traction coefficient of lubricating oil generally decreases with the increase of oil temperature, the lowest value o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M105/04C10M169/04C10M171/00C10N30/02C10N40/06C10N20/00C10N30/00C10N20/02
CPCC10M171/002C10N2230/02C10M2203/045C10M105/04C10N2230/08C10N2220/032C10N2270/00C10N2240/045C10N2220/022C10N2020/02C10N2030/02C10N2030/08C10N2070/00C10N2020/017C10N2040/045
Inventor 关口浩纪吉田幸生小田纯弘坪内俊之古贺英俊
Owner IDEMITSU KOSAN CO LTD
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