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Lubricant oil composition for internal combustion engines and method for producing same, and method for preventing pre-ignition

A lubricating oil composition, a technology of pre-ignition, applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve problems such as adverse effects of increasing fuel consumption, engine failure, etc. Effect

Active Publication Date: 2021-06-04
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the occurrence of LSPI may adversely affect the improvement of fuel consumption or cause engine failure.

Method used

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  • Lubricant oil composition for internal combustion engines and method for producing same, and method for preventing pre-ignition
  • Lubricant oil composition for internal combustion engines and method for producing same, and method for preventing pre-ignition
  • Lubricant oil composition for internal combustion engines and method for producing same, and method for preventing pre-ignition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5、 comparative example 1～9

[0257] The base oils and various additives shown below were added in the blending amounts shown in Table 1, followed by sufficient mixing to prepare lubricating oil compositions. It should be noted that the dynamic viscosity of the lubricating oil composition at 100°C was adjusted to 7.8mm 2 / s.

[0258] Details of base oils and various additives used in Examples and Comparative Examples are shown below.

[0259] (ingredient (A))

[0260] ・"Base oil": Base oil classified as Group 3 in the API base oil category, dynamic viscosity at 40°C = 20.0mm 2 / s, 100℃ dynamic viscosity=4.5mm 2 / s, viscosity index=123.

[0261] (ingredient (B))

[0262] ・Component (B1) Calcium sulfonate: Calcium sulfonate, alkali value 300 mgKOH / g, calcium atom content = 11.7% by mass.

[0263] ・Component (B2) Magnesium sulfonate: Magnesium sulfonate, base value 400 mgKOH / g, content of magnesium atoms = 9.7% by mass.

[0264] ・Component (B3) Sodium sulfonate: Sodium sulfonate, base value 450 mgKOH / g...

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PUM

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Abstract

A lubricant oil composition for internal combustion engines, comprises a base oil (A), a metallic cleaner (B) comprising a calcium-based cleaner (B1), a zinc dialkyldithiophosphate (C) and a molybdenum-containing compound (D), wherein the content of the component (B1) is more than 100 ppm by mass and up to 600 ppm by mass in terms of calcium atom content relative to the whole mass of the lubricant oil composition, the content of the magnesium-based cleaner (B2) is less than 200 ppm by mass in terms of magnesium atom content relative to the whole mass of the lubricant oil composition, the content of the sodium-based cleaner (B3) is less than 200 ppm by mass in terms of sodium atom content relative to the whole mass of the lubricant oil composition, the ratio of the content of phosphorus atoms derived from the component (C) to the content of calcium atoms derived from the component (B1), i.e., [P / Ca], is 0.25 or more by mass, and the sulfated ash content is 0.7% by mass or less. According to a method for producing the lubricant oil composition for internal combustion engines, and a method for preventing pre-ignition by using the lubricant oil composition for internal combustion engines, it is possible to provide the lubricant oil composition for internal combustion engines, which has a satisfactory friction-reducing effect, can prevent the occurrence of LSPI in a spark-ignited internal combustion engine, and has reduced adverse effects on an exhaust gas purification device; the method for producing the lubricant oil composition for internal combustion engines; and the method for preventing pre-ignition by using the lubricant oil composition for internal combustion engines.

Description

technical field [0001] The present invention relates to a lubricating oil composition for an internal combustion engine, a method for producing the same, and a method for suppressing preignition. Background technique [0002] In recent years, in order to improve the fuel consumption (fuel consumption) of spark ignition internal combustion engines such as gasoline engines, the introduction of engines equipped with supercharging mechanisms such as turbochargers and superchargers has been promoted. In addition, through the direct injection of the engine equipped with a supercharging mechanism, the torque at a lower speed can be increased, and the exhaust gas volume can be reduced while maintaining the same output, so the fuel consumption can be improved and the mechanical loss can be reduced at the same time. proportion. [0003] However, in an engine equipped with a direct-injection supercharging mechanism, a phenomenon called Low-Speed ​​Pre-ignition (Low-Speed ​​Pre-Ignitio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M135/18C10M137/10C10N10/02C10N10/04C10N10/12C10N30/00C10N30/06C10N40/25
CPCC10N2040/25C10M2223/045C10N2030/45C10N2030/42C10N2010/12C10M2219/068C10N2030/02C10M2219/046C10M2209/084C10M2215/28C10M2207/026C10M2215/064C10N2030/06C10N2030/04C10M163/00C10N2010/02C10N2010/04C10N2060/14Y02T10/12C10N2030/041C10N2040/255C10M135/10C10M135/18C10M137/10C10M141/10C10M169/04C10M2203/003C10M2219/044
Inventor 清水保典石川元治
Owner IDEMITSU KOSAN CO LTD
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