Reduced engine deposits from dispersant treated with copper

Abstract

The invention provides a lubricating composition containing an oil of lubricating viscosity and a dispersant treated with copper reagent. The invention further relates to methods of lubricating an internal combustion engine by supplying the described lubricating composition to the internal combustion engine. The invention further relates to the use of a dispersant treated with copper to reduce deposits on the inner surfaces of engine components.

Description

FIELD OF INVENTION[0001]The invention provides a lubricating composition containing a dispersant treated with copper to reduce the formation of high temperature insoluble solids formed during exposure of the composition to heat. The invention further relates to the use of the lubricating composition in an internal combustion engine. The invention further relates to a method of reducing insoluble deposits in an engine using said dispersant treated with copper and said lubricating composition.BACKGROUND OF THE INVENTION[0002]It is known that lubricants become less effective during their use due to exposure to the operating conditions of the device they are used in, including exposure to heat, oxygen, and partial combustion by-products generated by the operation of the device. For example, engine oil becomes less effective during its use, in part due to exposure of the oil to acidic and pro-oxidant by-products. These oxidized and acidic hydrocarbons of the lubricant can then go on to c...

AI Technical Summary

Benefits of technology

The present patent is about copper modified dispersants which are used to prevent the formation of deposits on engine components and the walls of glass tubes. These copper modified dispersants also help increase the oxidation induction times of the lubricant used in the tests. In simple terms, this patent is about a new technology that helps prevent the buildup of harmful substances on important engine parts.

Problems solved by technology

It is known that lubricants become less effective during their use due to exposure to the operating conditions of the device they are used in, including exposure to heat, oxygen, and partial combustion by-products generated by the operation of the device.

For example, engine oil becomes less effective during its use, in part due to exposure of the oil to acidic and pro-oxidant by-products.

These oxidized and acidic hydrocarbons of the lubricant can then go on to cause corrosion, wear and deposit problems.

These design specifications lead to greater oxidative stress on the lubricant and increased propensity to form high temperature deposits on key engine zones such as the piston ring zone.

Given the continual demands placed on the lubricant by the modern engine designs mentioned above, modern engine testing is necessarily becoming more severe.

For instance, the industry standard high temperature deposit test (Sequence IIIG) is a very severe piston cleanliness test with high sump temperatures and high load.

It is widely believed that lowering these limits in lubricants may have a serious impact on engine performance, engine wear, and oxidation of engine oils.

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