Lubricating oil for non-stage transmission

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

Active Publication Date: 2010-03-31
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] The preparation of embodiment 1 fluid 4

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

Embodiment 2

[0113] The preparation of embodiment 2 fluid 5

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

Embodiment 3

[0115] The preparation of embodiment 3 fluid 6

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

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Abstract

A lubricating oil for non-stage transmissions characterized by comprising a base oil comprising a combination of a synthetic oil (I) having (a) a coefficient of traction at 120 DEG C of at least 115% of that of 2,4-dicyclohexyl-2-methylpentane, (b) a viscosity at -40 DEG C not higher than that of 2,4-dicyclohexyl-2-methylpentane (260 Pa s), and (c) a viscosity index of 65 or higher and a synthetic oil (II) having a viscosity at -40 DEG C of 1 Pa s or lower. It is further characterized in that the base oil satisfies specific properties. The lubricating oil for non-stage transmissions has a high coefficient of traction even at high temperatures and has satisfactory low-temperature flowability. It is hence suitable for use as a lubricating oil for non-stage transmissions for motor vehicles.

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 Applications(China)
IPC IPC(8): C10M105/04C10N20/02C10M169/04C10N30/00C10M171/00C10N20/00C10N40/06C10N30/02
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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