Metal-Free Engine Lubricant Composition for Wear and Emissions
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Solution Overview
Problem
Existing lubricant compositions fail to effectively address the issues of particulate emissions and wear between surfaces in internal combustion engines due to the use of zinc dihydrocarbyl dithiophosphates, which contribute to particulate matter in the exhaust emissions from internal combustion engines, and existing GMO compositions are limited in the form of glyceride compositions before problems with solubility, corrosion, compatibility with other components and demulsification may occur.
Innovation Solution
The use of a distilled mono-glyceride additive composition comprising an ester of a fatty acid and glycerol in which at least 70 % by weight of the additive is in the form of a mono-ester, and wherein at least 90 % by weight of the fatty acids in the mono-ester are C 16-20 fatty acids, and wherein the fatty acids are a mixture of oleic and linoleic acids, the anti-wear and/or friction modifying performance of a lubricant composition is improved by using a lubricant composition comprising an ester additive composition comprising an ester of a fatty acid and glycerol, which is free from metals, sulfur, and phosphorus, thereby reducing wear and friction in internal combustion engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zinc dihydrocarbyl dithiophosphates are used as anti-wear additives, then wear protection is improved, but particulate emissions increase
Solution Approach 1:
The invention extracts and removes zinc, phosphorus, and sulfur from the anti-wear additive composition, replacing traditional zinc dihydrocarbyl dithiophosphates with alternative friction modifiers that do not contain these harmful elements, thereby eliminating ash formation and particulate emissions while maintaining wear protection
Solution Approach 2:
The invention changes the chemical composition parameters of the anti-wear additive by specifying precise ranges for fatty acid chain lengths (C16-C22), unsaturation levels (1-3 double bonds), and glyceride composition (60-90% mono-glycerides, 5-30% di-glycerides, 0-10% tri-glycerides), creating a new class of metal-free, sulfur-free, phosphorus-free friction modifiers that maintain protective functions without harmful emissions
2Reliability
If glycerol mono-oleate compositions are used as friction modifiers, then friction reduction is improved, but solubility and compatibility problems occur
Solution Approach 1:
The invention applies local quality by creating distinct glyceride composition ranges for different functional requirements: mono-glycerides (60-90%) provide friction modification, di-glycerides (5-30%) enhance solubility and compatibility, and tri-glycerides (0-10%) provide additional lubricity, with the specific composition tailored to the base oil type and engine application
Solution Approach 2:
The invention uses composite glyceride materials comprising mixtures of mono-, di-, and tri-glycerides with specific fatty acid compositions (predominantly C16-C22 fatty acids with 1-3 double bonds), creating a composite friction modifier that combines the benefits of different glyceride types while maintaining stability and compatibility
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The lubricant composition exhibits improved anti-wear and friction modifying properties, reducing wear and friction on surfaces, enhancing fuel economy, and improving the power of internal combustion engines.
Implementation Method 1
OFMs typically have a polar head group which is attracted to the metal surfaces found in an engine, and a hydrophobic tail which helps to create a thin lubricating layer at the metal surface
Data Source
Figure 1
AI summary
A lubricant composition comprises an anti-wear and or/friction modifying additive which is an ester of a fatty acid and a polyol. At least 50 % by weight of the additive is in the form of a mono-ester, and is preferably a mono-glyceride. The lubricant composition may be used in an internal combustion engine.