Gaseous-Fueled Engine Lubricant Additives for Oxidative Stability
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Solution Overview
Problem
Engines operating under high load and temperature conditions face oxidative degradation and deposit formation, necessitating lubricants with enhanced oxidative stability and deposit control, particularly in gaseous-fueled and diesel engines.
Innovation Solution
A lubricating oil composition comprising a base oil and a lubricant additive with specific hydrocarbyl groups and functionalization, enhancing oxidative stability and deposit control, suitable for engines with sustained high load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lubricants are used in high load and temperature conditions, then the engine operates normally, but oxidative degradation and deposit formation occur leading to performance degradation
Solution Approach 1:
The patent modifies the chemical structure of lubricant additives by incorporating specific heteroatoms (nitrogen, oxygen, or sulfur) at defined positions in the molecular structure. This parameter change in the additive composition enhances oxidative stability and reduces deposit formation under high temperature and load conditions.
Solution Approach 2:
The invention uses composite lubricant formulations combining base oil with specially structured additives containing multiple functional groups (R1, R2, R3 hydrocarbyl groups with heteroatoms Y and Z). This composite approach creates synergistic effects that simultaneously improve oxidative stability and prevent deposit formation.
2Stability of the object's composition
If thickeners are added to maintain viscosity in specified range, then viscosity requirements are met, but the complexity of the lubricant composition increases
Solution Approach 1:
The patent designs lubricant additives that perform multiple functions simultaneously: they provide viscosity stabilization, oxidative protection, and deposit control through their multifunctional molecular structure containing hydrocarbyl groups and heteroatoms at specific positions. This eliminates the need for separate thickeners and other additives.
Solution Approach 2:
The invention merges the functions of thickeners, antioxidants, and deposit controllers into a single integrated additive molecule. The combined structure with R1, R2, R3 groups and heteroatoms Y/Z at defined positions creates one compound that accomplishes multiple lubricant performance requirements.
Data Source
AI summary
This disclosure describes a gaseous-fueled, low-speed, or medium speed engine lubricating oil composition. The composition includes a major amount of base oil; and a lubricant additive having the following structure:where each R1 is independently a hydrocarbyl group having 10-400 carbons; X is an alkyl, aryl, or heteroaromatic group having 1 to 10 carbons; Y is nitrogen, oxygen, or sulfur; each R2 is independently a hydrocarbyl group having 1 to 9 carbons; Z is nitrogen, oxygen, or sulfur; and each R3 is independently a hydrogen or hydrocarbyl group having 1 to 9 carbons with one or more nitrogen, oxygen, or sulfur functionalization, wherein p is 1 to 3, n is 1 to 20 and m is 0 to 3.