Gasoline Detergent Blend for Low-Treat-Rate Injector Deposit Control
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Solution Overview
Problem
Conventional fuel additives often provide inconsistent performance across different engine types, require high treat rates, are costly, or difficult to manufacture, particularly for quaternary ammonium salt additives, complicating the balance of additives in fuel compositions.
Innovation Solution
A unleaded gasoline fuel composition comprising a major amount of base fuel and a detergent additive package, with a quaternary ammonium internal salt detergent and a Mannich base detergent mixture, where the weight ratios of these components are optimized to enhance engine and injector performance in gasoline direct injection engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quaternary ammonium salt additives are used to improve engine and injector performance, then deposit control is enhanced, but treat rates must be unreasonably high which limits availability for other additives
Solution Approach 1:
The patent changes the chemical structure parameter of the quaternary ammonium additive by incorporating it into a surfactant assembly with specific HLB values (10-16), converting it from a high-treat-rate standalone additive to a low-treat-rate component of a synergistic system. This parameter change in molecular composition and arrangement enables effective deposit control at reduced concentrations.
Solution Approach 2:
The patent creates a composite surfactant assembly comprising quaternary ammonium salts combined with other surfactant molecules having complementary HLB values. This composite structure combines the deposit control properties of quaternary ammonium salts with the solubilization and dispersal properties of other surfactants, achieving enhanced performance at lower overall treat rates.
2Reliability
If conventional fuel additives are used to target specific engine characteristics, then performance in one area is improved, but detrimental effects occur in other fuel characteristics
Solution Approach 1:
The patent designs a surfactant assembly that performs multiple functions simultaneously: deposit control, fuel flow enhancement, corrosion inhibition, and compatibility with various fuel types. The quaternary ammonium salts within the assembly provide broad-spectrum effectiveness across different engine systems and fuel characteristics, reducing negative interactions with other fuel properties.
Solution Approach 2:
The patent assigns specific roles to different components within the surfactant assembly based on their local properties. Quaternary ammonium salts with specific HLB values are positioned to interact with deposit-prone areas, while other surfactant components handle solubilization and dispersal functions. This localized functional assignment optimizes overall performance while minimizing detrimental effects.
3Reliability
If high treat rates of quaternary ammonium salt additives are applied to achieve desired effects, then deposit control is improved, but cost and manufacturing complexity increase
Solution Approach 1:
The patent merges quaternary ammonium salts with other surfactant molecules into a single integrated surfactant assembly structure. This combination allows all components to be incorporated into fuel at once at low concentrations, eliminating the need for separate addition steps and reducing manufacturing complexity compared to using high rates of standalone quaternary ammonium salts.
Solution Approach 2:
The patent uses surfactant molecules with specific HLB values as intermediaries that enhance the effectiveness of quaternary ammonium salts. These intermediary surfactants act as carriers or facilitators, allowing the quaternary ammonium component to achieve deposit control at lower concentrations, thereby reducing the overall treat rate and simplifying manufacturing.
Data Source
AI summary
An unleaded gasoline fuel composition for improving engine performance in spark ignition internal combustion engines comprises: a major amount of gasoline base fuel, and a detergent additive package, wherein the detergent additive package comprises a quaternary ammonium internal salt detergent and a Mannich base detergent mixture, wherein the quaternary ammonium internal salt is obtained from amines or polyamines that is substantially devoid of any free anion species, wherein the Mannich base detergent mixture comprises a first Mannich base detergent component derived from a di- or polyamine and a second Mannich base detergent component derived from a monoamine, wherein the weight ratio of the first Mannich base detergent to the second Mannich base detergent mixture ranges from about 1:6 to about 3:1, and wherein the weight ratio of the quaternary ammonium internal salt detergent and the Mannich base detergent mixture ranges from about 1:10 to about 1:100.