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Lubricant oil composition

A technology of lubricating oil composition and lubricating oil base oil, which is applied in the direction of lubricating composition, petroleum industry, base material, etc., and can solve the problems that are not disclosed or implied

Active Publication Date: 2008-10-08
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Document 7 does not disclose or suggest a method for preventing wear in a transmission having a slip control type wet clutch, especially in a continuously variable transmission in which metal pulleys contact a metal belt under severe conditions, or for preventing long-term wear of a slip control type wet clutch. Any solution for characteristic tremors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6 and comparative example 1-3

[0122] Lubricating oil compositions of Examples 1-6 and Comparative Examples 1-3 listed in Table 1 were prepared to evaluate (1) initial anti-chatter performance, (2) maintenance of anti-chatter performance, and (3) anti-chatter performance as follows. grinding performance. The results are also listed in Table 1. The proportion of base oil is based on the total mass of base oil, while the amount of each additive is based on the total mass of the composition.

[0123] (1) Initial anti-vibration performance

[0124] Evaluation of the initial anti-shock performance was carried out in accordance with JASO M349-98 with LVFA at a surface pressure of 1.5 MPa, and other conditions, thereby measuring d μ / dV in the range of 2 rpm to 200 rpm. The d μ / dV value is an index, and a positive number and a large value indicate excellent initial anti-chatter performance, while a negative number indicates extremely poor anti-chatter performance.

[0125] (2) Retention of anti-vibration perform...

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Abstract

Disclosed is a lubricant oil composition which has an excellent preventive property on the abrasion of a metal pulley or a metal belt and an excellent initial shudder preventing property, can exert a shudder preventing property for a prolonged period of time, and is suitable for use in a continuously variable transmission with a sliding-controlled wet clutch and a metal belt. A lubricant oil composition comprising (A) alkylsalicylic acid metal salts composed of 85-100 mol% of a monoalkylsalicylic acid metal salt, 0-15 mol% of a dialkylsalicylic acid metal salt and 40-100 mol% of a 3-alkylsalicylic acid metal salt, each based on the total amount of the composition, and / or a (per)basic salt thereof; (B) a specific nitrogen compound, and (C) a phosphorus-containing anti-abrasion agent in a lubricant base oil.

Description

[technical field] [0001] The present invention relates to lubricating oil compositions suitable for transmissions equipped with slip-controlled wet clutches, more particularly to continuously variable transmissions equipped with slip-controlled wet clutches and metal belts, especially wet starter clutches Composition, since the composition contains a specific salicylate detergent, the composition has excellent anti-wear performance of transmission metal pulleys and metal belts and excellent initial anti-chatter performance, and can maintain the anti-chatter performance for a long time . [Background technique] [0002] Recently, automatic transmissions have been required to be lightweight and downsized and to be improved in power transmission capability in relation to increased power output of an engine used in combination with the transmission. Therefore, lubricating oils for these transmissions are required to have improved lubricating properties, that is, properties to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M163/00C10M101/02C10M129/54C10M135/36C10M137/04C10M159/22C10N10/02C10N10/04C10N30/00C10N30/06C10N40/04
CPCC10M163/00C10M2203/10C10M2203/1006C10M2207/026C10M2207/144C10M2207/146C10M2207/262C10M2215/064C10M2215/28C10M2219/046C10M2219/104C10M2219/106C10M2219/108C10M2223/04C10M2223/041C10M2223/042C10M2223/043C10M2223/045C10M2223/047C10M2223/049C10M2229/041C10N2210/01C10N2210/02C10N2230/00C10N2230/06C10N2230/52C10N2230/74C10N2230/76C10N2240/04C10N2240/042C10N2240/045C10N2260/14C10N2010/02C10N2010/04C10N2030/00C10N2030/06C10N2040/04C10N2060/14C10N2030/52C10N2030/74C10N2030/76C10N2040/042C10N2040/045
Inventor 小松原仁松井茂树
Owner NIPPON OIL CO LTD
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