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Lubricating oil composition for internal combustion engine

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

Inactive Publication Date: 2021-03-09
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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  • Lubricating oil composition for internal combustion engine
  • Lubricating oil composition for internal combustion engine
  • Lubricating oil composition for internal combustion engine

Examples

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Embodiment

[0203] Hereinafter, based on an Example and a comparative example, this invention is demonstrated more concretely. However, the present invention is not limited to these Examples.

[0204]

[0205] Using the base oils and additives shown below, lubricating oil compositions of the present invention (Reference Examples 1-2, 7-8, Examples 3-6) and comparative lubricating oil compositions (Comparative Examples 1-5 ). In the table, "inmass%" means mass% based on the total amount of base oil, "mass%" means mass% based on the total amount of the composition, and "mass ppm" means mass ppm based on the total amount of the composition .

[0206] (base oil)

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

[0208] (Metal based cleaner)

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

[0210] B1-2: C...

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Abstract

The present invention provides a lubricating oil composition for an internal combustion engine, which contains (A) a kinematic viscosity at 100°C of 2 to 8mm 2 / s and a base oil having an aromatic content of 10% by mass or less, (B) comprising (B1) a metal-based cleaner overbasified with calcium carbonate and (B2) a metal-based cleaner overbasified with magnesium carbonate The metal-based detergent of the agent, and (C) sulfurized molybdenum dithiocarbamate or sulfurized oxidized molybdenum dithiocarbamate, based on the total amount of the lubricating oil composition, the calcium content is 1500 mass ppm or less, and the magnesium content is 300 The mass ppm or more, the molybdenum content is 600 mass ppm or more, and the HTHS viscosity at 150° C. is 2.7 mPa·s or less.

Description

technical field [0001] The present invention relates to lubricating oil compositions 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 the existing naturally aspirated engines with engines with a lower displacement (supercharged small engines) equipped with superchargers. plan. With a supercharged small engine, it is possible to reduce the exhaust gas volume while maintaining the output due to the supercharger, thereby reducing fuel consumption. [0003] On the other hand, in a supercharged small engine, when the torque in the low speed region is increased, ignition may occur in the cylinder earlier than the predetermined timing (LSPI: Low Speed ​​Pre-Ignition, Low Speed ​​Pre-Ignition). Once LSPI occurs, the energy loss increases, and the improvement of fuel consumption and the im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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