Lubricating oil composition for transmissions
    4.
    发明申请
    Lubricating oil composition for transmissions 有权
    用于变速器的润滑油组成

    公开(公告)号:US20060135378A1

    公开(公告)日:2006-06-22

    申请号:US11201345

    申请日:2005-08-10

    Abstract: A lubricating oil composition for transmissions comprises a lubricating base oil comprising (A) a lubricating base oil so adjusted to have a kinematic viscosity at 100° C. of from 1.5 to 5 mm2/s and a % CN of from 10 to 60 (B) a mineral lubricating base oil having a kinematic viscosity at 100° C. of from 10 to 50 mm2/s and a sulfur content of from 0.3 to 1 percent by mass and (C) a synthetic oil composed of carbon and hydrogen and having a number average molecular weight of from 2,000 to 20,000, in respective specific amounts and (D) an extreme pressure additive of from 0.05 to 2 percent by mass, based on the total amount of the composition, of comprising a phosphorus-based extreme pressure additive, a sulfur-based extreme pressure additive and/or a phosphorus-sulfur-based extreme pressure additive, wherein in the composition, the phosphorus content (P) is from 0.01 to 0.05 percent by mass, the total sulfur content (S) is from 0.05 to 0.3 percent by mass, and the P/S ratio is from 0.10 to 0.40. The lubricating oil composition has both excellent fuel economy performance and satisfactory durability for gears and bearings and furthermore excellent low temperature viscosity and oxidation stability.

    Abstract translation: 用于变速器的润滑油组合物包括润滑基础油,其包含(A)润滑基础油,其被调节为使得在100℃下的运动粘度为1.5至5mm 2 / s,和% (B)在100℃下的运动粘度为10〜50mm 2 / s的矿物润滑油基础油和硫 含量为0.3〜1质量%,(C)由碳和氢组成的数均分子量为2,000〜20,000的合成油,(D)极压添加剂为0.05〜 基于组合物总量的2质量%,包含磷基极压添加剂,硫基极压添加剂和/或磷硫基极压添加剂,其中在组合物中, 磷含量(P)为0.01〜0.05质量%,总硫含量(S)为0.05〜0.3质量% 屁股,P / S比为0.10〜0.40。 润滑油组合物具有优异的燃料经济性能和令人满意的齿轮和轴承的耐久性,并且还具有优异的低温粘度和氧化稳定性。

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