Lubricant compositions for direct injection engines
a technology of lubricant composition and direct injection engine, which is applied in the field of lubricants, can solve the problems of adhesive wear, stick-tear wear, and common wear issue in internal combustion engines, and achieve the effect of reducing adhesive wear
Pending Publication Date: 2019-06-20
THE LUBRIZOL CORP
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Benefits of technology
The patent is about a way to decrease adhesive wear in a compression engine that uses a low phosphorus lubricant. The method involves adding certain ingredients to the lubricant: an oil, metal-containing detergents, polyisobutenyl succinimide dispersants, and a dispersant viscosity modifier. The resulting lubricant has reduced wear and tear.
Problems solved by technology
A common wear issue in internal combustion engines is adhesive wear, also known as stick-tear wear.
Adhesive wear occurs when material from two mated metal parts is transferred unevenly from one part to the other due to a lubricant's inability to maintain separation of the two parts or inability to maintain a low enough temperature in the system.
However, the reduction in HTHS viscosity and / or anti-wear additives generally causes an increase in adhesive wear on the metal to metal surfaces.
Method used
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[0131]A series of 10W-30 engine lubricants were prepared containing the additives described above as well as other conventional additives known to those of ordinary skill in the art. The amounts (wt %) of each additive are shown on table 1 below with the balance of the lubricating composition being the base oil. The lubricating compositions were evaluated for their ability to protect against adhesive wear using ASTM WK53775. The lubricating compositions and test results are summarized in Table 1.
TABLE 1Example 1Example 2Example 3Example 4Example 510W-3010W-3010W-3010W-3010W-30Group II Base OilxxxxxGroup III Base OilxGTL Base OilxxHV-dispersant0.7Other succinimide3.64.43.73.73.4dispersantZDDP 1 (C3 / C6)0.681.01.01.00.18ZDDP 2 (C6 2°)0.6High TBN Ca Sulfonate0.120.540.520.640.22Low TBN Ca Sulfonate0.670.360.500.580.87High TBN Mg Sulfonate0.380.38S-coupled Phenate0.50.840.29Methylene coupled phenate0.370.250.371 (Mg saligenin)Methylene coupled phenate0.452 (Ca salixarate)Ashless Antioxid...
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The disclosed technology provides a lubricating composition and a method of lubricating an internal combustion engine where the lubricating composition contains an 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 adhesive wear.
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 which provide improved protection against adhesive wear.BACKGROUND OF THE INVENTION[0002]A common wear issue in internal combustion engines is adhesive wear, also known as stick-tear wear. Adhesive wear occurs when material from two mated metal parts is transferred unevenly from one part to the other due to a lubricant's inability to maintain separation of the two parts or inability to maintain a low enough temperature in the system. In these cases, the mated parts develop micro-welds which are then torn away as the two parts move away from each other. Adhesive wear is often addressed by increasing the viscosity of the lubricant and / or by increasing the amount of anti-wear additives in the lubricating composition.[0003]Certain lubricating compositions,...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C10M133/56C10M159/22C10M159/24C10M159/18
CPCC10M133/56C10M159/22C10M159/24C10M159/18C10N2230/04C10N2230/02C10N2230/06C10N2210/02C10M2207/027C10M2207/028C10N2220/022C10M2207/144C10M2207/262C10M2215/28C10N2220/021C10N2230/42C10N2240/102C10N2240/105C10M2223/045C10M167/00C10M2203/1025C10M2205/02C10M2205/0285C10M2205/04C10M2205/173C10M2207/026C10M2215/064C10M2219/044C10M2219/046C10M2219/087C10M2219/088C10M2219/089C10N2020/04C10N2030/02C10N2030/40C10N2030/06C10N2030/42C10N2040/251C10N2040/252C10N2040/253C10N2040/255C10N2040/26C10N2040/25C10M2205/06C10M2205/08C10N2020/02C10N2010/04C10N2060/10C10N2030/04
Inventor LOOP, JOHN G.RAGUZ, MARY GALIC
Owner THE LUBRIZOL CORP