Glycerol Derivative Functional Fluid for Tractor Hydraulic Systems
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Solution Overview
Problem
Tractor hydraulic fluids face challenges in maintaining frictional properties at elevated temperatures and providing adequate anti-wear protection, especially at slow speeds, which can lead to brake system failures and gear damage.
Innovation Solution
A functional fluid composition comprising a major amount of lubricating viscosity oil, with specific amounts of glycerol carbonate or borated glycerol, and overbased sulfonate detergents, along with antiwear additives, is used to enhance friction retention and anti-wear properties, thereby improving brake and clutch performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic anti-wear agents are used in tractor hydraulic fluids, then anti-wear protection is provided, but the protection is insufficient at slow speeds
Solution Approach 1:
The patent changes the chemical parameters of the anti-wear agent by using glycerol carbonate or borated glycerol instead of conventional agents. These chemical parameter changes enable the fluid to maintain effective anti-wear protection specifically at slow speeds while preserving protection at higher speeds, thus resolving the speed-dependent performance limitation.
2Reliability
If the friction coefficient is reduced to improve brake performance, then brake capacity is improved, but friction retention at elevated temperatures deteriorates
Solution Approach 1:
The patent modifies the friction modifier parameters by selecting specific compounds (glycerol carbonate or borated glycerol) that maintain stable friction coefficients across a wide temperature range. This parameter optimization allows the fluid to provide adequate brake capacity while retaining sufficient friction at elevated temperatures to prevent brake system failure.
3Reliability
If multiple additives are used to meet exacting specifications, then all necessary functional characteristics are achieved, but the fluid composition complexity increases
Solution Approach 1:
The patent employs glycerol carbonate or borated glycerol as multi-functional additives that simultaneously provide anti-wear protection, friction modification, and temperature stability. This universal approach allows a single additive package to meet multiple functional specifications without requiring numerous separate additives, thereby reducing overall composition complexity while maintaining all necessary performance characteristics.
Data Source
AI summary
A functional fluid comprising a major amount of an oil of lubricating viscosity, and an oil soluble amount of glycerol carbonate or an oil soluble amount of a borated glycerol.