Low-Phosphorus Lubricant Composition for Ford 6.7L Valvetrain Wear Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for lubricating oil compositions that provide excellent anti-wear properties and fuel economy while maintaining phosphorus levels below 1000 ppm, particularly to pass stringent wear tests like the Ford 6.7L Power Stroke Diesel Engine Test, while adhering to the latest engine durability and emissions standards.
Innovation Solution
A specific ratio of unborated PIBSA-PAM dispersants to soap is incorporated into lubricant compositions, with a ratio of 6.65 or more, along with a lubricating oil composition comprising at least 50% base oil, 2-10% PIBSA-PAM, and 0.1-0.9% soap, to enhance anti-wear properties and meet the Ford 6.7L test criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lower viscosity lubricants are used to improve fuel economy, then energy consumption is reduced, but oil film thickness decreases leading to higher wear rates
Solution Approach 1:
The patent changes the chemical composition parameters of the lubricant by incorporating specific ratios of unborated PIBSA-PAM dispersants (2.0-6.00 mass%) and soap (0.1-0.9 mass%) with a ratio of 6.65 or more, enabling the lubricant to maintain protective functions at lower viscosities
Solution Approach 2:
The patent creates a composite lubricant system combining multiple additives (unborated PIBSA-PAM dispersants and soap detergents) in specific proportions to achieve synergistic effects that provide both fuel economy benefits and wear protection at low phosphorus levels
2Reliability
If ZDDP additives are used to prevent engine wear, then anti-wear properties are improved, but phosphorus levels increase above 1000 ppm
Solution Approach 1:
The patent extracts the phosphorus-containing ZDDP additive from the lubricant formulation and replaces it with phosphorus-free unborated PIBSA-PAM dispersants and soap detergents, achieving wear protection without exceeding phosphorus limits
Solution Approach 2:
The patent changes the chemical mechanism of wear protection by shifting from phosphorus-based boundary lubrication (ZDDP) to a different protective mechanism using unborated dispersants and soap that form protective films without contributing phosphorus to the combustion system
3Object-generated harmful factors
If phosphorus levels are reduced below 1000 ppm to meet emissions standards, then catalytic converter performance is improved, but valvetrain wear protection deteriorates
Solution Approach 1:
The patent introduces unborated PIBSA-PAM dispersants and soap detergents as intermediary substances that mediate between the need for low phosphorus levels and the need for wear protection, forming protective films on valvetrain components without contributing phosphorus to the exhaust system
Solution Approach 2:
The patent changes the protective mechanism parameter by transitioning from phosphorus-based protection to a soap and dispersant-based protection system that operates effectively at phosphorus levels below 1000 ppm while meeting emissions requirements
Data Source
AI summary
This invention relates to lubricating oil compositions containing less than 1000 ppm phosphorus, comprising or resulting from the admixing of A) one or more base oil(s), B) one or more dispersant(s), wherein said one or more dispersants comprise at least 2.0 mass %, based on the total mass of the lubricating oil composition, of one or more unborated poly(alkenyl)succinimides, in which the polyalkenyl is derived from polyisobutylene and the imide is derived from polyamine (“PIBSA-PAM”); and C) one or more detergent(s), wherein said one or more detergent(s) together provide soap to the lubricating oil composition in an amount of 0.1 to 0.9 mass %, based on the total mass of the lubricating oil composition; wherein the ratio of mass %, based on the total mass of the lubricating oil composition, of the one or more unborated PIBSA-PAM(s) to soap of the lubricating oil composition is 6.65 or more.