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Lubricant oil composition for internal combustion engine

A technology of lubricating oil composition and internal combustion engine, applied in the direction of lubricating composition, petroleum industry, base material, etc., can solve the problems of fuel consumption, low-speed torque restriction, energy loss increase, etc., achieve cleanliness saving and improve LSPI inhibition performance Effect

Active Publication Date: 2018-08-31
JXTJ NIPPON OIL & ENERGY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once LSPI occurs, the energy loss increases, and the improvement of fuel consumption and the improvement of low-speed torque are restricted

Method used

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  • Lubricant oil composition for internal combustion engine
  • Lubricant oil composition for internal combustion engine
  • Lubricant oil composition for internal combustion engine

Examples

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Embodiment 1～8、 comparative example 1～5

[0205] Using the base oil and additives shown below, the lubricating oil composition of the present invention (Examples 1 to 8) and the lubricating oil composition for comparison (Comparative Examples 1 to 5) were prepared, respectively. In the table, "inmass%" means mass% based on the total base oil, "mass%" means mass% based on the total composition, and "mass ppm" means mass ppm based on the total composition .

[0206] (Base oil)

[0207] O-1: Class III base oil, kinematic viscosity (100℃) 4.15mm 2 / s, aromatic content 0.2% by mass

[0208] (Metal cleaner)

[0209] B1-1: CaCO 3 Overbasic salicylic acid Ca, Ca content 8.0% by mass, metal ratio 3.0, alkalinity (perchloric acid method) 225mgKOH / g, sulfur content 0.0% by mass

[0210] B1-2: CaCO 3 Overbased sulfonic acid Ca, Ca content 12.75% by mass, alkalinity (perchloric acid method) 325mgKOH / g, sulfur content 2.0% by mass

[0211] B2-1: MgCO 3 Overbased sulfonic acid Mg, Mg content 9.3% by mass, alkalinity (perchloric acid method) ...

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Abstract

According to the present invention, a lubricant oil composition for an internal combustion engine contains (A) a base oil having a kinematic viscosity of 2-8 mm2 / s at 100 DEG C and 10 mass% or less aromatic content, (B) a metal-based detergent including (B1) a metal-based detergent overbased by calcium carbonate and (B2) a metal-based detergent over-based by magnesium carbonate, and (C) molybdenumdithiocarbamate sulfide or oxymolybdenum dithiocarbamate sulfide; wherein, based on the total amount of the lubricant oil composition, the calcium content is 1500 or less ppm by mass, the magnesium content is 300 or more ppm by mass and the molybdenum content is 600 or more ppm by mass; and wherein the HTHS viscosity at 150 DEG C is 2.7 or less mPa.s.

Description

Technical field [0001] The present invention relates to a lubricating oil composition for internal combustion engines. Background technique [0002] In recent years, in order to reduce the fuel consumption of internal combustion engines for automobiles, especially gasoline engines for automobiles, it has been proposed to replace existing naturally aspirated engines with engines with lower displacement (supercharged small engines) equipped with superchargers. Program. The use of a supercharged small engine, with a supercharger, can maintain output while reducing the exhaust volume, achieving a reduction in fuel consumption. [0003] On the other hand, in a supercharged small engine, when the torque in the low-speed range is increased, ignition may occur in the cylinder earlier than a predetermined time (LSPI: Low Speed ​​Pre-Ignition). Once LSPI occurs, energy loss increases, and the improvement of fuel consumption and the increase of low-speed torque are restricted. The occurren...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M101/02C10M129/10C10M133/12C10M135/18C10M137/10C10N10/04C10N10/12C10N20/02C10N30/00C10N30/04C10N40/25
CPCC10M169/045C10M2203/1025C10M2207/026C10M2209/084C10M2215/064C10M2215/28C10M2219/022C10M2219/046C10M2219/106C10M2207/262C10M2219/068C10M2223/045C10N2020/04C10N2020/02C10N2030/04C10N2030/10C10N2030/42C10N2030/52C10N2030/06C10N2040/25C10N2040/255C10N2010/12C10N2010/04C10N2060/14C10M135/18C10M137/10C10M169/04C10M101/00C10M125/22C10M129/00C10M129/54C10M133/00C10M141/10C10M2201/084C10M2203/003C10M2207/023C10M2215/26
Inventor 星野耕治松田裕充金子丰治山守一雄
Owner JXTJ NIPPON OIL & ENERGY CORP
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