Renewable Engine Oil Composition for Low Volatility and Fuel Economy
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Solution Overview
Problem
Existing lubricant compositions struggle to meet stringent performance requirements for low viscosity, low volatility, and low temperature properties, particularly in automotive engine oils, while also addressing environmental sustainability and supply chain constraints.
Innovation Solution
A lubricant composition using a renewable base oil with a saturated hydrocarbon mixture, characterized by specific branching characteristics, is synthesized through oligomerization and hydroisomerization of C14-C20 alpha-olefins, providing improved fuel economy, reduced Low Speed Pre-ignition (LSPI), and controlled viscosity and volatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the viscosity of the oil is reduced to enhance fuel economy, then fuel economy is improved, but volatility increases leading to increased evaporation and oil loss
Solution Approach 1:
The patent changes the chemical composition parameters of the base oil by using hydroisomerized oligomers with specific carbon numbers (C24-C40) and controlled branching characteristics (0.5-2.0 branches per molecule). This parameter change allows the oil to achieve lower viscosity for improved fuel economy while maintaining low volatility through the specific molecular structure that resists evaporation
Solution Approach 2:
The patent creates a composite base oil formulation by blending hydroisomerized oligomers with specific physical properties (viscosity 3-10 cSt at 100°C, density 0.74-0.78 g/cm³) with carefully selected additive packages. This composite approach allows the lubricant to simultaneously achieve low viscosity for fuel economy and low volatility for reduced oil loss
2Use of energy by moving object
If ultra low viscosity oils are used to improve fuel economy, then fuel economy is enhanced, but they are unable to meet stringent volatility requirements
Solution Approach 1:
The patent achieves ultra-low viscosity (3-10 cSt at 100°C) through controlled oligomerization and hydroisomerization processes that create molecules with specific branching characteristics. The controlled number of branches (0.5-2.0 per molecule) and carbon numbers (C24-C40) creates a unique parameter set that delivers both ultra-low viscosity for fuel economy and low volatility for reliability
Solution Approach 2:
The patent applies local quality by creating a base oil with non-uniform molecular structure - specifically distributed branching throughout the carbon chain rather than concentrated at ends. This local distribution of branches (0.5-2.0 per molecule across C24-C40 chains) creates regions of different fluidity that collectively achieve ultra-low viscosity while the overall molecular weight maintains low volatility
3Object-affected harmful factors
If renewable base oils are used to address sustainability, then environmental performance is improved, but meeting stringent performance specifications becomes challenging
Solution Approach 1:
The patent changes the feedstock parameter from conventional petroleum-based sources to renewable resources (vegetable oils, animal fats, algae oils). This parameter change in raw material origin improves environmental sustainability while the controlled chemical processing (oligomerization and hydroisomerization) maintains precise control over molecular structure to meet performance specifications
Solution Approach 2:
The patent discards conventional petroleum feedstocks and recovers/uses renewable resources as base oil feedstocks. By recovering and upgrading renewable oils through oligomerization and hydroisomerization processes, the patent transforms materials that would otherwise be considered alternative or secondary sources into high-performance lubricants meeting stringent specifications
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 achieves at least 0.3% better fuel economy improvement and 0.5% better fuel economy retention compared to conventional lubricants, while limiting additive metal concentration increase and preventing LSPI, with superior low temperature and volatility properties.
Implementation Method 1
A lubricant composition using a renewable base oil with a saturated hydrocarbon mixture, characterized by specific branching characteristics, is synthesized through oligomerization and hydroisomerization of C14-C20 alpha-olefins
Implementation Method 2
A lubricant composition using a renewable base oil with a saturated hydrocarbon mixture, characterized by specific branching characteristics, is synthesized through oligomerization and hydroisomerization of C14-C20 alpha-olefins
Data Source
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AI summary
Provided herein are lubricant compositions comprising renewable base oils as embodied by hydrocarbon mixtures with controlled structure characteristics in combination with lubricant additives that address performance requirements and stricter environmental and fuel economy regulations. The lubricant composition provides performance in the cold crank simulated viscosity (CCS) vs Noack volatility relationship, which allows for the formulation of lower viscosity engine oils with improved fuel economy, improved fuel economy retention, and retained LSPI prevention additionally conferring improved characteristics to other devices or apparatus requiring lubrication.