Hydroxycarboxylic Acid Friction Modifier for Engine Oil
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current automotive engine oils fail to effectively reduce friction in mechanical components, leading to increased energy consumption and decreased fuel efficiency, particularly in boundary and elastohydrodynamic friction regimes.
Innovation Solution
A lubricant composition comprising a base stock and a friction reducing additive with a specific chemical formula (R1[(AO)n—R2]m, where R1 has at least 2 active hydrogen atoms, m is at least 2, AO is an alkylene oxide residue, and R2 includes polyhydroxyalkyl or polyhydroxyalkenyl carboxylic acid residues, is used to reduce the coefficient of friction in engine oils and other lubricants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional friction reducing additives (organic, metal organic, or oil insoluble) are used in engine oils, then some friction reduction is achieved, but the reduction is insufficient particularly in boundary and elastohydrodynamic friction regimes
Solution Approach 1:
The invention changes the chemical parameters of the friction reducing additive by specifying a particular molecular structure with R1[(AO)n—R2]m formula where R1 has at least 2 active hydrogen atoms, m is at least 2, and R2 includes polyhydroxyalkyl or polyhydroxyalkenyl carboxylic acid residues. This structural parameter change enables the additive to effectively reduce friction in boundary and elastohydrodynamic regimes where conventional additives fail.
Solution Approach 2:
The friction reducing additive represents a composite molecular structure combining multiple functional groups: polyhydroxyalkyl/polyhydroxyalkenyl carboxylic acid residues (R2), alkylene oxide residues (AO), and a core structure with active hydrogen atoms (R1). This composite structure integrates the benefits of different chemical moieties to achieve superior friction reduction across multiple friction regimes simultaneously.
2Loss of energy
If engine oil viscosity is reduced to improve hydrodynamic losses, then fuel efficiency improves, but protection in boundary and elastohydrodynamic regimes may be compromised
Solution Approach 1:
The invention applies local quality by providing targeted friction reduction specifically in boundary and elastohydrodynamic regimes through the specialized additive structure, while allowing the base oil viscosity to be optimized for hydrodynamic losses. The additive acts locally at metal surfaces where boundary and elastohydrodynamic friction occurs, without requiring changes to the bulk oil viscosity.
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 significantly reduces friction losses in mechanical systems, improving fuel efficiency and extending the lifespan of components by minimizing wear and tear, with the additive capable of reducing the coefficient of friction by up to 50% as measured in mini-traction machine tests.
Implementation Method 1
The lubricant composition significantly reduces friction losses in mechanical systems... with the additive capable of reducing the coefficient of friction by up to 50%
Data Source
AI summary
The present invention relates to a lubricant composition containing a base stock and at least 0.01 wt % of a friction reducing additive which is a compound of the Formula (I):R1[(AO)n—R2]m (I)wherein R1 is the residue of a group having at least 2 active hydrogen atoms; m is at least 2; AO is an alkylene oxide residue; each n is independently from 0 to 100; and each R2 is independently H or R3, where each R3 is independently a residue of a polyhydroxyalkyl or polyhydroxyalkenyl carboxylic acid, a residue of a hydroxyalkyl or hydroxyalkenyl carboxylic acid and/or a residue of an oligomer of the hydroxyalkyl or hydroxyalkenyl carboxylic acid; and on average at least 0.5 of R2 groups are R3. The lubricant composition is suitable for use in an engine oil, a hydraulic oil or fluid, a gear oil and/or a metal-working fluid.