Acylated Polyalkylene Polyamine Friction Modifier for Lubricating Oils
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current lubricating oil compositions for power transmission fluids, such as automatic transmission fluids, face challenges in maintaining friction stability over time due to thermal and oxidative stresses, leading to additive degradation and changes in friction coefficients, which can result in inconsistent vehicle performance and clutch failure.
Innovation Solution
The use of a combination of oil-soluble thioalkyl phosphite ester compounds and polyalkylene polyamine-based friction modifiers, where the latter is acylated to enhance thermal and oxidative stability without compromising friction control, provides improved friction stability in lubricating oils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of friction modifier is increased to improve friction stability, then friction stability is improved, but the friction coefficients are lowered to undesirable levels
Solution Approach 1:
The patent applies parameter changes by acylating the polyalkylene polyamine friction modifier, which modifies the chemical structure and properties of the additive. This acylation process changes the parameters of the friction modifier to achieve both improved thermal/oxidative stability and maintained friction coefficients, resolving the contradiction between friction stability and friction coefficient control
Solution Approach 2:
The patent uses a composite approach by combining the acylated polyalkylene polyamine friction modifier with specific base oils and other additives in a formulated lubricating oil composition. This composite formulation allows the friction modifier to work synergistically with other components to maintain desirable friction coefficients while achieving improved friction stability through the acylation modification
2Reliability
If oxidation resistance is improved through additives, then friction stability is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple functions into a single friction modifier component. The acylated polyalkylene polyamine simultaneously provides friction modification, thermal stability, and oxidative resistance properties. This consolidation reduces formulation complexity compared to using separate additives for each function, while maintaining improved friction stability
3Reliability
If friction modifier concentration is increased to maintain friction control, then friction control is improved, but cost increases
Solution Approach 1:
The acylation modification changes the parameters of the friction modifier to improve its effectiveness and stability. This allows for reduced additive concentrations while maintaining or improving friction control performance, thereby reducing the quantity of substance required and lowering costs
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
This combination significantly improves the thermal and oxidative stability of friction modifiers, maintaining stable static friction levels over extended use, thereby enhancing the durability and reliability of power transmission fluids without the need for high additive concentrations, thus reducing development and usage costs.
Implementation Method 1
the acylated polyalkylene polyamine-based friction modifier has improved thermal and oxidative stability
Implementation Method 2
the acylated polyalkylene polyamine-based friction modifier has improved thermal and oxidative stability
Implementation Method 3
A lubricating oil composition comprises a base lubricating oil, at least one oil soluble thioalkyl phosphite ester compound and at least one acylated polyalkylene polyamine-based friction modifier
Implementation Method 4
maintaining stable static friction levels over extended use
Data Source
AI summary
Lubricating oil compositions having excellent friction stability comprise a base lubricating oil, an oil soluble source of phosphorus and a defined polyalkylene polyamine-based friction modifier that has been reacted with an acylating agent to convert at least one secondary amine group into an amide.