Method of operating internal combustion engine by introducing detergent into combustion chamber

Abstract

In a method of operating an internal combustion engine, a nitrogen-containing detergent composition is introduced into a combustion chamber of the engine wherein the detergent composition can improve the performance of both a fuel composition and a lubricating oil of the engine. The detergent composition contains (A) a reaction product of a hydrocarbyl-substituted acylating agent and an amine, (B) a hydrocarbyl-substituted amine, (C) a Mannich reaction product, (D) a high molecular weight polyetheramine, or (E) a mixture thereof.

Description

[0001] This application claims the benefit of U.S. Provisional Application Nos. 60 / 368354 filed 28 Mar. 2002 and 60 / 441012 filed 17 Jan. 2003.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention comprises a method of operating an internal combustion engine that comprises introducing a nitrogen-containing detergent composition into a combustion chamber during the operation of the engine. The method results in improved performance of a lubricating oil of the engine and also improves performance of a fuel composition when the detergent composition is present in the fuel composition. [0004] 2. Description of the Related Art [0005] Current and future performance requirements and exhaust emission requirements for internal combustion engines are necessitating new and improved lubricating oil formulations and methods of lubrication for engines. [0006] Longer intervals between engine oil drains lessen demands for disposal and effects on the environment, b...

AI Technical Summary

Benefits of technology

[0025] To achieve the foregoing objects in accordance with the invention, as described and claimed herein, a method of operating an internal combustion engine comprises introducing a nitrogen-containing detergent composition that comprises (A) a reaction product of a hydrocarbyl-substituted acylating agent and an amine; (B) a hydrocarbyl-substituted amine; (C) a Mannich reaction product of a hydrocarbyl-substituted hydroxy-containing aromatic compound, an aldehyde, and an amine; (D) a high molecular weight polyetheramine prepared by reacting one unit of a hydroxy-containing hydrocarbyl compound with two or more units of butylene oxide to form a polyether intermediate, and aminating the polyether intermediate by reacting the polyether intermediate with an amine or with acrylonitrile and hydrogenating the reaction product of the polyether intermediate and acrylonitrile; or (E) a mixture thereof into a combustion chamber of the engine during the operation of the engine wherein the detergent composition improves the performance of a lubricating oil of the engine.

Problems solved by technology

Formulating an engine lubricating oil with increased amounts of additives to meet increased performance requirements is not always possible due to limitations such as allowable sulfur, phosphorus and metal content as well as performance issues from high levels of additives such as seal compatibility with high levels of dispersants.

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