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Lubricating oil composition

A lubricating oil composition and composition technology, applied in the direction of lubricating compositions, petroleum industry, additives, etc., can solve problems affecting the retention of friction characteristics, not paying enough attention, affecting the wear prevention of lubricating oil compositions, etc. , to achieve excellent performance

Active Publication Date: 2016-09-28
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sufficient attention has not been given to the lubricating oil composition for a transmission disclosed in the above-mentioned patent document in terms of wear prevention and seizure prevention after deterioration in consideration of long service life characteristics.
[0004] With regard to deterioration, it has been found that in addition to the deterioration of the lubricating oil composition due to its oxidation after long-term use, compounds leached from the sealing material, i.e., the rubber material used in the transmission, adversely affect the wear prevention properties of the lubricating oil composition
Obviously this also adversely affects the retention of the frictional properties, especially the anti-shudder properties, which are required especially for automatic transmission oils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 11 and comparative example 1 to 8

[0143] Lubricating oil compositions of Examples 1 to 11 shown in Table 1 were prepared (prepared to have 5.5mm 2 / s 100°C Kinematic Viscosity) and the lubricating oil compositions of Comparative Examples 1 to 8 shown in Table 2 for comparison, and the evaluation involves when they were newly mined and after being subjected to the oxidation stability test and the rubber immersion test (1) wear resistance and (2) seizure prevention (extreme pressure). The results are also shown in Tables 1 and 2. The proportion of each base oil is based on the total mass of the oil, and the amount of each additive is based on the total mass of the composition.

[0144] (1) Abrasion prevention

[0145] The abrasion resistance was evaluated as follows: The wear scar diameter was measured by sliding the ball back and forth for one hour in the Shell four-ball test according to ASTM D4172 under the conditions of a load of 392N, a rotation speed of 1900rpm, and an oil temperature of 100°C.

[0146]...

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Abstract

Provided is a lubricating oil composition that, while having a low viscosity in order to increase fuel efficiency, has superior wear prevention characteristics, seize prevention characteristics, and the like, takes into consideration long service life characteristics, and has superior characteristics of preventing wear, seizing, and furthermore shattering that result from the elution of compounds from a sheet member after oxidation degradation and as a result of long-term use. The lubricating oil composition is characterized by having a kinetic viscosity at 40 DEG C of no greater than 30 mm<2> / s, and by having, in the lubricating oil base oil with respect to the entire quantity of the composition, (A) 100-500 mass ppm of a boron-containing ashless dispersant with respect to the amount of boron, (B) 300-800 mass ppm of a phosphorus-based additive with respect to the amount of phosphorus, (C) 1-4 mass% of an amide-based and / or an imide-based friction modifier, and (D) 100-300 mass ppm of an alkali metal and / or alkaline earth metal detergent with respect to the metal.

Description

technical field [0001] The present invention relates to lubricating oil compositions, and more particularly to lubricating oil compositions which, even after deterioration, have the same high load resistance as those lubricating oil compositions when they are new oils, that is, have a long working life, and are particularly useful It is suitable for transmission oil for automobiles, especially suitable for automatic transmission oil. Background technique [0002] It has been ruled that new fuel efficiency consumption rules will be imposed on domestic automobiles since 2015, and requests for improvements in fuel efficiency of automobiles have been increasing year by year. Lubricating oils for transmissions and internal combustion engines of automobiles have been required to contribute to energy saving, and lowering of the viscosity of lubricating oils is an example of contribution. Lowering the viscosity of lubricating oils to be used in, for example, transmissions can reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M163/00C10M133/16C10M135/36C10M137/02C10M137/04C10M139/00C10M159/20C10N10/02C10N10/04C10N20/00C10N20/02C10N30/00C10N30/06C10N40/04C10N40/25C10N40/30
CPCC10M163/00C10M2215/08C10M2215/086C10M2215/206C10M2215/28C10M2223/04C10M2201/085C10M2203/003C10M2207/262C10M2219/046C10M2219/106C10M2223/049C10N2010/02C10N2010/04C10N2030/06C10N2030/02C10N2030/10C10N2030/36C10N2030/54C10N2030/72C10N2060/14C10M141/10C10M141/12
Inventor 松木伸悟辰巳刚异相宏典栗原功伊东政朗
Owner JX NIPPON OIL & ENERGY CORP
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