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Lubricating composition and method of lubricating an internal combustion engine

A lubricating composition and composition technology, applied in the field of internal combustion engines and diesel engines, can solve problems such as increased adhesive wear

Pending Publication Date: 2019-05-21
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reductions in HTHS viscosity and / or antiwear additives often lead to increased adhesive wear on metal-to-metal surfaces

Method used

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  • Lubricating composition and method of lubricating an internal combustion engine
  • Lubricating composition and method of lubricating an internal combustion engine
  • Lubricating composition and method of lubricating an internal combustion engine

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Experimental program
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Effect test

Embodiment Construction

[0175] A series of 10W-30 engine lubricants was prepared containing the additives described above as well as other conventional additives known to those of ordinary skill in the art. The amount (% by weight) of each additive is shown in Table 1 below, and the balance of the lubricating composition is base oil. The ability of lubricating compositions to resist adhesive wear protection was evaluated using ASTM WK53775. The lubricating compositions and test results are summarized in Table 1.

[0176] Table 1

[0177]

[0178] A series of 5W-30 engine lubricants was prepared containing the additives described above as well as other conventional additives known to those of ordinary skill in the art. The amount (% by weight) of each additive is shown in Table 1 below, and the balance of the lubricating composition is base oil. The ability of lubricating compositions to resist adhesive wear protection was evaluated using ASTM WK53775. The lubricating compositions and test resu...

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Abstract

A lubricating composition and a method of lubricating an internal combustion engine are disclosed. The lubricating composition contains oil of lubricating viscosity, one or more metal-containing, sulfur-free, alkyl-phenol based detergents, an alkaline earth metal sulfonate detergent, a polyisobutenyl succinimide dispersant, and a dispersant viscosity modifier having a number average molecular weight of at least 20,000. The lubricating composition of the present invention can be formulated to have lower HTHS viscosity, and reduced phosphorous content, while providing protection against adhesivewear.

Description

field of invention [0001] The disclosed technology relates to lubricants, particularly for internal combustion engines, including diesel engines. In particular, the disclosed technology relates to lower viscosity lubricating compositions that provide improved protection against adhesive wear. Background technique [0002] A common wear problem in internal combustion engines is adhesive wear, also known as stick-tear wear. Adhesive wear occurs when material from two mating metal parts transfers unevenly from one part to the other due to the inability of the lubricant to keep the two parts separated or to keep the temperature in the system low enough. In these cases, mated parts develop micro-welds that are then torn apart as the two parts move away from each other. Adhesive wear is typically addressed by increasing the viscosity of the lubricant and / or by increasing the amount of antiwear additives in the lubricating composition. [0003] Certain lubricating compositions, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M167/00C10N10/04C10N20/02C10N30/02C10N30/06C10N40/25C10N40/26
CPCC10M167/00C10M2203/1025C10M2205/02C10M2205/0285C10M2205/04C10M2205/173C10M2207/026C10M2207/027C10M2207/028C10M2207/144C10M2207/262C10M2215/064C10M2215/28C10M2219/044C10M2219/046C10M2219/087C10M2219/088C10M2219/089C10M2223/045C10N2020/04C10N2030/02C10N2030/40C10N2030/06C10N2030/42C10N2040/251C10N2040/252C10N2040/253C10N2040/255C10N2040/26C10N2040/25C10M2205/06C10M2205/08C10N2020/02C10N2010/04C10N2060/10C10N2030/04C10M133/56C10M159/18C10M159/22C10M159/24
Inventor J·G·卢普M·G·拉古兹
Owner THE LUBRIZOL CORP