Fuel Detergent Composition 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, and fail to balance multiple performance characteristics effectively in gasoline port fuel injection and direct injection engines.
Innovation Solution
A unleaded gasoline fuel composition comprising a detergent additive package with a quaternary ammonium internal salt detergent and a Mannich base detergent mixture, devoid of free anion species, in specific weight ratios, to enhance engine and injector performance in gasoline direct injection engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fuel additives are used to improve engine performance, then certain characteristics are improved, but the additives require high treat rates which limit the amount of other additives available
Solution Approach 1:
The patent combines quaternary ammonium internal salt detergent with Mannich base detergent to create a composite additive package. This composite approach allows the quaternary ammonium compound to provide effective deposit control at lower treat rates (1-50 ppm) while the Mannich base detergent provides additional cleaning and protective functions, thereby reducing the overall quantity of additives needed while maintaining or improving engine performance
Solution Approach 2:
The patent merges the functions of multiple additives into a single quaternary ammonium internal salt compound that provides both detergent and deposit control properties. This consolidation reduces the number of separate additives required and lowers the total treat rate needed to achieve effective engine protection and deposit control
2Reliability
If quaternary ammonium salt fuel additives are used to improve injector performance, then deposit control is enhanced, but the additives are costly and difficult to manufacture
Solution Approach 1:
The patent uses Mannich base detergent as an intermediary substance that works synergistically with the quaternary ammonium internal salt. The Mannich base component facilitates the effectiveness of the quaternary ammonium compound, allowing lower treat rates to achieve the same deposit control performance, thereby reducing the overall cost and manufacturing complexity of the additive package
Solution Approach 2:
The patent changes the chemical structure parameters of the detergent by using quaternary ammonium internal salts with specific hydrocarbon chains and functional groups. This structural optimization improves the additive's effectiveness per unit concentration, allowing lower treat rates to achieve effective injector performance and deposit control, thereby reducing manufacturing costs and complexity
3Reliability
If fuel additives are optimized for gasoline port fuel injection engines, then performance in that engine type is improved, but comparable performance in gasoline direct injection engines is not achieved
Solution Approach 1:
The quaternary ammonium internal salt detergent is designed with universal functionality that enables it to effectively control deposits in both gasoline port fuel injection and gasoline direct injection engines. The compound's amphoteric nature and specific molecular structure allow it to adapt to different fuel delivery systems and engine types, providing consistent performance across multiple applications without requiring separate additive formulations
Data Source
Figure 1
AI summary
A detergent additive package comprising 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.