Glyceride Anti-Wear Additives for Low Ash Lubricants
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Solution Overview
Problem
There is a need for alternative anti-wear and friction modifier compositions that do not contain zinc, phosphorus, or sulfur, which are typically found in existing lubricant and fuel additives, to reduce exhaust emissions and improve the performance of internal combustion engines.
Innovation Solution
The use of oil-soluble mono-, di-, or tri-glycerides of hydroxy polycarboxylic acids or their derivatives as anti-wear and friction modifiers in lubricant and fuel compositions, which are zinc-free, phosphorus-free, and sulfur-free, providing effective anti-wear and friction modification properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zinc dihydrocarbyl dithiophosphates (ZDDP) are used as anti-wear additives in lubricant compositions, then effective anti-wear protection is achieved, but ash is generated which contributes to particulate matter in exhaust emissions
Solution Approach 1:
The patent changes the chemical composition parameters of the anti-wear additive by replacing zinc dihydrocarbyl dithiophosphates with alternative compounds that have different combustion characteristics, specifically selecting additives that produce minimal or no ash upon combustion while maintaining anti-wear effectiveness
Solution Approach 2:
The invention extracts and removes the harmful zinc, phosphorus, and sulfur elements from the anti-wear additive composition, selecting alternative compounds that provide the necessary lubrication and wear protection functions without containing these problematic elements
2Reliability
If zinc and phosphorus containing additives are used to provide anti-wear properties, then effective lubrication is achieved, but the amount of zinc and phosphorus in exhaust emissions increases
Solution Approach 1:
The patent changes the elemental composition parameters by selecting anti-wear additives that contain alternative elements or are element-free, specifically avoiding zinc, phosphorus, and sulfur while maintaining the functional properties of wear protection and friction modification
Solution Approach 2:
The invention employs organic-based anti-wear additives that are designed to decompose completely during combustion, leaving no persistent metal residues, effectively replacing the longer-lasting but harmful zinc and phosphorus compounds
Data Source
AI summary
The use of an oil-soluble mono-, di-, or tri-glyceride of at least one hydroxy polycarboxylic acid, or a derivative thereof, as an anti-wear additive and/or friction modifier in a non¬ aqueous lubricant composition and/or in a fuel composition. Also, a non-aqueous lubricant composition and a fuel composition for an internal combustion engine which comprise at least one additive which is an oil-soluble mono-, di-, or tri-glyceride of at least one hydroxy polycarboxylic acid, or a derivative thereof.