Polyalpha Olefin Engine Oil Lubricant for Fuel Economy
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Solution Overview
Problem
Current low viscosity engine oil lubricant compositions face challenges in simultaneously enhancing fuel efficiency while maintaining engine wear protection and reducing oil consumption, particularly due to increased volatility and oil consumption associated with low viscosity base oils.
Innovation Solution
The development of an engine oil lubricant composition that includes a polyalpha olefin base oil component with specific Noack volatility, combined with a Group II base oil and non-borated succinimide dispersant, along with a polymeric ethylene oxide friction modifier, to achieve improved fuel efficiency and desirable Noack volatility levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low viscosity base oil is used to improve fuel efficiency, then fuel economy is improved, but volatility and oil consumption increase
Solution Approach 1:
The patent employs a composite base oil formulation combining Group III base oil (50-90 wt%) with Group II base oil (10-50 wt%). This composite approach leverages the low viscosity of Group III for fuel efficiency while Group II contributes to volatility control, achieving both improved fuel economy and reduced oil consumption through synergistic material combination
Solution Approach 2:
The patent specifies precise parameter ranges for the base oil components: Group III base oil with viscosity at 100°C of 2-10 cSt and Group II base oil with viscosity at 100°C of 3-15 cSt. By controlling these viscosity parameters and their proportions, the formulation achieves optimal balance between fuel efficiency (lower viscosity) and volatility control (appropriate viscosity range), reducing both oil consumption and emissions
2Use of energy by moving object
If low viscosity base oil is used to improve fuel efficiency, then fuel economy is improved, but engine wear protection may deteriorate
Solution Approach 1:
The patent controls the viscosity parameters of base oil components (Group III: 2-10 cSt at 100°C, Group II: 3-15 cSt at 100°C) to maintain adequate lubrication film thickness despite low overall viscosity. This parameter optimization ensures fuel efficiency benefits from low viscosity while preventing engine wear through sufficient protective film formation
Solution Approach 2:
The combination of Group III and Group II base oils creates a composite lubricant that balances low viscosity (for fuel efficiency) with adequate wear protection. The Group II component specifically contributes to film strength and protective properties, ensuring engine protection is maintained even at reduced viscosity levels
3Use of energy by moving object
If non-borated succinimide dispersant with low molecular weight is used, then fuel economy is improved, but dispersant effectiveness may be reduced
Solution Approach 1:
The patent specifies a precise molecular weight range for the non-borated succinimide dispersant (peak molecular weight 4000-6000), optimizing the balance between fuel economy and dispersant effectiveness. This controlled molecular weight parameter ensures adequate dispersant performance while minimizing viscosity contribution for improved fuel efficiency
Solution Approach 2:
The patent uses different molecular weight ranges for different dispersant components: non-borated succinimide dispersant (peak MW 4000-6000) for fuel efficiency, and borated dispersant (peak MW 6000-10000) for enhanced dispersant effectiveness. Each component is optimized for its specific function, with the lower MW component contributing to fuel economy and the higher MW component ensuring adequate protection
Data Source
AI summary
Provided is an engine oil lubricant composition with improved fuel efficiency. The engine oil lubricant composition includes: a polyalpha olefin base oil component an amount of about 50 wt% to about 90 wt% based on a total weight of the engine oil lubricant composition, wherein the polyalpha olefin base oil component is a Group IV base oil and has a Noack volatility of about 12.5% to about 15%; a Group II base oil component in an amount of about 0.1 wt% to about 50 wt% based on the total weight of the engine oil lubricant composition. The engine oil lubricant composition has (i) a kinematic viscosity at 100°C of about 10 cSt or less, (ii) a high temperature high shear viscosity at 150°C of about 2.2 cP or less, and (hi) a Noack volatility of about 20% or less.