Fuel-Soluble Synergistic Cleaning Mixture for High-Pressure Injectors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fuel additives are ineffective in reducing fuel injector deposits in gasoline engines operating at high fuel pressures, particularly in newer engine technology that operates at pressures 15 to 100 times higher than traditional engines, leading to performance issues and fouling of injectors.
Innovation Solution
A synergistic combination of a quaternary ammonium internal salt and a hydrocarbyl substituted dicarboxylic anhydride derivative is injected into the engine as a fuel-soluble cleaning mixture, effective at high pressures (500 to 7,500 psi), providing a significant clean-up performance by reducing existing deposits and maintaining injector cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional fuel additives are used in high-pressure gasoline engines, then the engine can operate at high fuel pressures, but the fuel injector deposits are not effectively reduced
Solution Approach 1:
The patent changes the chemical parameters of the fuel additive by using a synergistic combination of a quaternary ammonium internal salt (Formula I) and a hydrocarbyl substituted dicarboxylic anhydride derivative (Formula II) with specific molecular structures and ratios (1:4 to 4:1), which enables effective deposit reduction at high fuel pressures where conventional additives fail
Solution Approach 2:
The patent applies composite material principle by combining two different chemical compounds with complementary functions - the quaternary ammonium internal salt provides cationic character for interacting with deposits, while the dicarboxylic anhydride derivative provides anhydride groups for chemical reaction, creating a synergistic effect that achieves 30-100% clean-up performance
2Quantity of substance
If conventional detergents like hydrocarbyl substituted succinimides are used, then they can control deposit formation at low pressures, but they do not provide effective clean-up performance at high fuel pressures
Solution Approach 1:
The patent changes the chemical structure parameters from conventional succinimides to a novel combination of quaternary ammonium internal salt and dicarboxylic anhydride derivative, which fundamentally alters the mechanism of action to enable effective clean-up at high pressures while maintaining low treat rates
3Power
If high fuel pressures (500-7500 psi) are used in newer engine technology, then engine performance is improved, but injector fouling and performance degradation occur
Solution Approach 1:
The patent applies preliminary anti-action by incorporating the synergistic cleaning mixture into the fuel before injection, which proactively prevents deposit formation and actively cleans existing deposits on injector surfaces before they can cause performance degradation, allowing the engine to maintain optimal performance at high pressures
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 synergistic cleaning mixture achieves 30 to 100% clean-up of fuel injector deposits, as measured by long-term fuel trim, injector pulse width, and injection duration, at low treat rates, effectively addressing the limitations of conventional additives in high-pressure engines.
Implementation Method 1
combusting the fuel composition in the gasoline engine
Data Source
Figure 1
AI summary
The present disclosure relates to methods and fuel compositions for reducing fuel injector deposits in gasoline engines operated at high fuel pressures. The fuel compositions include hydrocarbons boiling in the gasoline range and a synergistic fuel injector cleaning mixture.