LTTM Engine Oil Base Stock for Wear Control and Fuel Efficiency
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Solution Overview
Problem
Current engine oil formulations face challenges in simultaneously achieving wear control, friction reduction, and maintaining fuel efficiency over a broad temperature range, particularly with the use of low viscosity engine oils, which often require high levels of antiwear and friction modifier additives that can lead to catalyst poisoning and deposit formation.
Innovation Solution
The development of low transition temperature mixtures (LTTMs) or deep eutectic solvents (DESs) as synthetic base stocks or additives, comprising a eutectic mixture of a hydrogen bond acceptor and a hydrogen bond donor, which form an equilibrium phase that prevents crystallization and provides improved wear control and friction reduction while maintaining fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high levels of antiwear and friction modifier additives are used in low viscosity engine oils, then wear control and friction reduction are improved, but catalyst poisoning and deposit formation occur
Solution Approach 1:
The patent changes the chemical composition parameters by using LTTMs/DESs with specific hydrogen bond donor-acceptor combinations, replacing traditional high-level additive packages. This parameter change achieves wear control through the unique eutectic mixture properties rather than through high concentrations of conventional additives, thereby avoiding catalyst poisoning
Solution Approach 2:
The patent employs composite material strategy by creating LTTMs/DESs that combine hydrogen bond donors and acceptors in specific ratios to form eutectic mixtures. These composite fluid structures provide both lubrication and wear protection functions inherently, eliminating the need for separate high-level additive packages that cause catalyst poisoning
2Reliability
If high levels of antiwear and friction modifier additives are used in low viscosity engine oils, then wear control and friction reduction are improved, but deposit formation occurs
Solution Approach 1:
The patent modifies the chemical composition by using LTTMs/DESs with specific hydrogen bond donor-acceptor ratios, replacing traditional additive packages. This parameter change achieves sustained wear protection without the deposit formation associated with high levels of conventional additives
Solution Approach 2:
The patent uses biodegradable LTTMs/DESs composed of renewable natural products instead of persistent synthetic additives. These eco-friendly eutectic mixtures provide effective wear control while being environmentally benign and avoiding long-term deposit formation issues
3Use of energy by moving object
If low viscosity engine oils are used to improve fuel efficiency, then fuel economy is improved, but wear protection capability is reduced
Solution Approach 1:
The patent creates multi-functional LTTMs/DESs that simultaneously provide low viscosity for fuel efficiency and effective wear protection. The eutectic mixtures of hydrogen bond donors and acceptors deliver multiple functions including lubrication, wear control, and friction reduction in a single substance, eliminating the trade-off between viscosity and protection
Solution Approach 2:
The patent changes the viscosity and protective properties by adjusting the composition ratios of hydrogen bond donors and acceptors in the LTTMs/DESs. This parameter optimization enables the lubricant to maintain low viscosity for fuel efficiency while providing sufficient wear protection through the unique eutectic mixture structure
4Stability of the object's composition
If traditional polar co-base stocks like esters or alkylated naphthalene are added to increase fluid polarity, then solubility of polar additives is improved, but the complexity of formulation increases
Solution Approach 1:
The patent merges the functions of base stock and polarity provider into a single LTTM/DES system. The hydrogen bond donor-acceptor eutectic mixtures inherently provide both lubrication base stock properties and high fluid polarity, eliminating the need for separate polar co-base stock additions and simplifying the overall formulation
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 use of LTTMs/DESs in engine oils enhances wear control and reduces friction effectively, maintaining or improving fuel efficiency without the drawbacks of traditional additives, such as toxicity and high cost, and offers a controlled release of additives triggered by heat or moisture.
Implementation Method 1
The at least first component and the at least second component form an intermolecular interaction between each other sufficient to prevent crystallization of the at least first component and the at least second component in the eutectic mixture
Implementation Method 2
The eutectic mixture comprises an equilibrium phase between the at least first component and the at least second component
Data Source
AI summary
A low transition temperature mixture (LTTM) or deep eutectic solvent (DES) useful as a lubricating oil base stock and lubricating oil including a eutectic mixture of at least a first component and at least a second component. The at least first component comprises a hydrogen bond acceptor and the at least second component comprises a hydrogen bond donor. The eutectic mixture includes an equilibrium phase between the at least first component and the at least second component. The equilibrium phase does not exhibit physical characteristics of the at least first component in an unmixed state and the at least second component in an unmixed state. The at least first component and the at least second component form an intermolecular interaction between each other sufficient to prevent crystallization of the at least first component and the at least second component in the eutectic mixture. The eutectic mixture is a liquid at 20° C.