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Fuel-efficient engine oil composition

A composition and oil technology, applied in the directions of lubricating compositions, petroleum industry, base materials, etc., can solve the problems of deteriorating fuel-saving effect, increasing friction in surrounding lubricating areas, lack of oil film strength, etc., and achieving excellent fuel-saving performance. Effect

Inactive Publication Date: 2015-11-25
JX NIPPON OIL & ENERGY CORP
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Problems solved by technology

[0003] However, not only in gasoline engines but especially in diesel engines, if the oil is excessively reduced in viscosity, it will cause a detrimental effect on the durability of the engine due to the lack of oil film strength, and increase the friction of the surrounding lubricated area, so it will cause as only the viscosity reduction will be significant Land degradation and fuel saving effects, etc.
In addition, reducing the viscosity of the surrounding lubricated area with a friction modifier will degrade its effectiveness due to contamination by soot (soot is a product of combustion generated in a diesel engine)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0117] (Examples 1 and 2, Comparative Examples 1 to 3)

[0118] Various engine oil compositions were prepared by blending a viscosity index improver and other additives in the amounts shown in Table 2 using base oils having properties shown in Table 1. The properties of other additives are shown in Table 3.

[0119] Table 2 shows the composition and properties of each engine oil and the evaluation results.

[0120] From the results shown in Table 2, it is clear that the engine oils of Examples 1 and 2, in which the B / A ratios were 0.78 and 0.79, respectively, can be expected to be excellent in fuel economy because the oils evaluated by the idling test compared with 5W-30 The torque reduction rate is 3.0-3.6%. Meanwhile, the engine oils of Comparative Examples 1 to 3 in which the B / A ratio is 0.88 to 0.94 have a torque reduction ratio of 1.9 to 2.3% as evaluated by the idling test compared with 5W-30, and thus cannot be obtained as obtained in Examples 1 and 2. The excellent...

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Abstract

As an engine oil composition having exceptional fuel-efficient performance, there is provided an engine oil composition characterized by containing, in a lubricant base oil having a saturated component of 70 mass% or above and a viscosity index of 90 or above, at least 4 mass%, based on the total amount of the engine oil composition, of a star-shaped polymer as a viscosity index improver, the ratio (B / A) of high-temperature, high-shear viscosity (B) at 1 × 107 / s shear velocity and 100ºC to high-temperature, high-shear viscosity (A) at 1 × 106 / s shear velocity and 100ºC being 0.85 or less.

Description

technical field [0001] The present invention relates to an engine oil composition having excellent fuel economy. Background technique [0002] In recent years, in order to deal with environmental problems such as global warming, engine oils effective in reducing fuel consumption are also required. Examples of techniques for improving fuel economy of engine oil include lowering its viscosity to reduce friction at fluid lubricated areas, and blending of friction modifiers to reduce friction at surrounding lubricated areas. [0003] However, not only in gasoline engines but especially in diesel engines, if the oil is excessively reduced in viscosity, it will cause a detrimental effect on the durability of the engine due to the lack of oil film strength, and increase the friction of the surrounding lubricated area, so it will cause as only the viscosity reduction will be significant Deterioration of the fuel saving effect and other issues. Furthermore, reducing the viscosity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M101/02C10M143/12C10N20/02C10N30/00C10N40/25
CPCC10M169/041C10M143/12C10M2205/06C10N2220/022C10N2220/029C10N2230/02C10N2230/68C10N2240/102C10N2020/02C10N2020/073C10N2030/02C10N2030/68C10N2040/252C10M143/14
Inventor 吉田悟
Owner JX NIPPON OIL & ENERGY CORP
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