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Lubricating oil composition and method for producing same

a technology of lubricating oil and composition, which is applied in the direction of lubricant composition, petroleum industry, additives, etc., can solve the problems of increasing the friction coefficient of detergent dispersants, difficult to reduce the intermetal friction coefficient, and often worsening of high-temperature detergency, etc., and achieves low calcium content and low friction coefficient.

Inactive Publication Date: 2017-06-08
IDEMITSU KOSAN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a lubricating oil composition with a low amount of calcium and a low friction coefficient, while ensuring high-temperature detergency. This is achieved by adding a molybdenum dialkyldithiocarbamate compound in a specific amount or more.

Problems solved by technology

However, when the blending amount of molybdenum is restricted as in the examples disclosed in PTL 1, there is a case where it becomes difficult to decrease the intermetal friction coefficient.
Furthermore, in an engine oil containing a molybdenum dialkyldithiocarbamate, in which the amount of a molybdenum component is a predetermine amount or more, the high-temperature detergency is frequently worsened.
For that reason, a large amount of a detergent dispersant may be blended, but detergent dispersants often increases the friction coefficient.
That is, in an engine oil in which the amount of a molybdenum component is a predetermined amount or more, and the amount of a calcium component is reduced, it is difficult to achieve both an improvement of high-temperature detergency and a decrease of friction coefficient that are compatible with each other.

Method used

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  • Lubricating oil composition and method for producing same
  • Lubricating oil composition and method for producing same

Examples

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examples

[0160]Next, the present invention is described by reference to Examples, but it should be construed that the present invention is by no means limited by these Examples.

[0161]Measurement methods and evaluation method of various properties in the present specification are as follows.

(1) Kinematic Viscosity:

[0162]The kinematic viscosity is a value as measured using a glass-made capillary viscometer in conformity with JIS K2283:2000.

(2) Viscosity Index:

[0163]The viscosity index is a value as measured in conformity with JIS K2283:2000.

(3) HTHS Viscosity at 150° C.:

[0164]The HTHS viscosity at 150° C. is a viscosity as measured using a TBS viscometer (tapered bearing simulator viscometer) by the method of ASTM D4683 under conditions of shear rate: 106 sec−1, rotational rate (motor): 3,000 rpm, rotor / stator clearance: 3 μm, and oil temperature: 150° C.

(4) Paraffin Component (% Cp) by Ring Analysis:

[0165]The % Cp expresses a proportion (percentage) of paraffin components as calculated by the...

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Abstract

The lubricating oil composition of the present invention is a lubricating oil composition containing a lubricating base oil, a metal-based detergent, a molybdenum dialkyldithiocarbamate compound, and a boron-containing compound, wherein the metal-based detergent contains a calcium salicylate and at least one selected from the group consisting of a calcium sulfonate and a magnesium-based detergent; the lubricating oil composition arbitrarily contains an ashless friction modifier; the content of a calcium atom is 0.12 to 0.16 mass % on the basis of the whole amount of the lubricating oil composition; the content of a molybdenum atom is 0.05 to 0.10 mass % on the basis of the whole amount of the lubricating oil composition; and a predetermined coefficient X is less than 0.050.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a lubricating oil composition, for example, a lubricating oil composition for internal combustion engine to be used in a gasoline engine.BACKGROUND OF THE INVENTION[0002]In recent years, the environmental regulation is strengthened, and fuel consumption reduction of automobile engines is required. Thus, a supercharged direct injection engine mounted with a direct injection mechanism and a supercharging mechanism is being introduced. In the supercharged direct injection engine, by increasing a torque at a low rotational speed, the displacement can be decreased while keeping a power, and therefore, the fuel consumption can be improved.[0003]Meanwhile, in engine oils that are used for automobile engines, various additives are generally blended. For example, for the purpose of decreasing an intermetal friction coefficient to improve the fuel consumption, it is known to blend a molybdenum dialkyldithiocarbamate. In addition, fo...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M169/04C10M135/18
CPCC10M169/04C10M2215/02C10M2207/262C10N2230/52C10M2219/044C10N2230/02C10N2230/06C10N2230/10C10N2240/10C10N2230/45C10M2219/066C10M2223/045C10M2227/00C10M2203/1006C10M2215/223C10M2207/283C10M2209/084C10M2207/023C10M135/18C10M169/048C10M2219/068C10M2227/061C10M2207/144C10N2010/12C10N2030/04C10N2030/06C10N2040/25C10N2010/04C10M163/00C10M2201/087C10M2203/1025C10M2207/026C10M2207/28C10M2215/04C10M2215/064C10M2215/08C10M2215/086C10M2215/26C10M2215/28C10M2219/046C10M2215/06C10N2030/02C10N2030/10C10N2030/44C10N2030/52C10N2030/54C10N2030/68C10N2060/14C10N2020/02C10N2030/45
Inventor TAMURA, KAZUSHIITO, KOKIKANEKO, TOYOHARUYAMAMORI, KAZUO
Owner IDEMITSU KOSAN CO LTD
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