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Lubricating oil composition for gas engines

A technology for lubricating oil composition and gas engine, applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve the problem that it is difficult to realize long-term oil change without oil change, difficult to increase metal cleaning agent, and difficult to improve the maintenance of base value. And other issues

Inactive Publication Date: 2016-11-16
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, metal cleaners are difficult to increase due to the restriction of sulfuric acid ash, etc. In addition, it is difficult to increase the base number or greatly improve the base number maintenance under the action of antioxidants alone
In addition, due to the high combustion temperature of gas engines, nitrogen oxides are easily produced, so gas engine oils are prone to NOx degradation, high-temperature oxidation degradation, and the base value tends to decrease easily.
Therefore, even if an attempt is made to prolong the life of gas engine oil by conventional methods applied to engine oil, it is difficult to achieve long-term no need for oil change

Method used

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  • Lubricating oil composition for gas engines
  • Lubricating oil composition for gas engines
  • Lubricating oil composition for gas engines

Examples

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Comparison scheme
Effect test

Embodiment 1～11、 comparative example 1～2

[0143] Lubricating oil compositions of Examples and Comparative Examples having the compounding ratios shown in Table 1 were produced, and properties of the lubricating oil compositions were measured. Moreover, the lubricating oil composition of each Example and the comparative example was evaluated according to the said evaluation method.

[0144] [Table 1]

[0145]

[0146] ※The ingredients in Table 1 are as follows.

[0147] (A) Base oil: GroupIII (API classification), hydrorefined mineral oil, kinematic viscosity at 100°C 4.1mm 2 / s, viscosity index 131, n-d-M ring analysis %Cp 87.6%, sulfur content 10 mass ppm or less

[0148] (B1) Metal cleaning agent: overbased calcium salicylate, TBN (perchloric acid method) 225 mgKOH / g, calcium content 7.8% by mass

[0149] (B2) Metal cleaner: overbased sodium sulfonate, TBN (perchloric acid method) 450 mgKOH / g, sodium content 19.5% by mass

[0150] (B3) Metal cleaning agent: basic calcium sulfonate, TBN (perchloric acid method...

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Abstract

This lubricating oil composition for gas engines contains (A) a base oil, (B1) overbased calcium salicylate, (B2) overbased sodium sulfonate, (C1) an amine-based antioxidant, and (C2) a phenol-based antioxidant, the total contained amount of the (C1) amine-based antioxidant and (C2) phenol-based antioxidant being 4 mass% or higher based on the total amount of the composition.

Description

technical field [0001] The present invention relates to a lubricating oil composition for a gas engine, in particular to an engine oil used in a gas heat pump. Background technique [0002] Gas engine heat pump systems and combined heat and power systems have been put into practical use for air conditioning of houses and buildings. In this system, a gas engine fueled by natural gas, liquefied petroleum gas (LPG), or the like is generally used. These systems are burdened by inspection and maintenance work, and therefore maintenance improvement such as simplification of inspection and extension of intervals between maintenance operations has become an important issue. [0003] In the past, various engine oils mainly used calcium-based cleaners and magnesium-based cleaners as metal cleaners. In addition, antioxidants were usually optimized to increase the initial base value and maintain the base value for a long time to prolong the service life. However, metal cleaners are di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M163/00C10M167/00C10M129/10C10M133/12C10M133/40C10M145/14C10M159/22C10M159/24C10N10/02C10N10/04C10N10/12C10N30/00C10N40/25
CPCC10M163/00C10M2207/026C10M2207/262C10M2209/084C10M2215/064C10M2219/046C10M2227/066C10M2203/1025C10M2207/289C10M2215/065C10M2215/221C10M2215/28C10M2219/082C10M2223/045C10M2227/09C10N2010/12C10N2020/02C10N2010/02C10N2030/02C10N2030/10C10N2010/04C10N2030/40C10N2030/08C10N2030/52C10N2040/255C10N2060/14C10M167/00C10M125/22C10M133/40
Inventor 山崎广隆
Owner IDEMITSU KOSAN CO LTD
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