Acylated and Mannich Detergent Additives for GDI Injector Cleaning
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Solution Overview
Problem
Current gasoline additives designed for port fuel injection engines are inadequate for direct injection engines, leading to increased carbon deposits and higher emissions, which necessitate the development of new additives that can effectively clean and maintain GDI engines while reducing particle emissions.
Innovation Solution
A novel fuel additive composition comprising an acylated detergent, a Mannich detergent, and a polyether or polyetheramine, which are specifically formulated to reduce carbonaceous deposits in both port fuel injection and direct injection engines, with the acylated detergent being the reaction product of a hydrocarbyl-substituted acylating agent and a nitrogen-containing compound, and the Mannich detergent being the reaction product of a polyolefin, an aldehyde, and ammonia or an amine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PFI additives (Mannich compounds and polyetheramines) are used in GDI engines, then injector cleanliness is maintained to some extent, but deposit removal performance is insufficient and emissions remain high
Solution Approach 1:
The patent combines Mannich detergent, polyetheramine, and acylated detergent into a composite additive package that leverages the synergistic effects of each component. The Mannich detergent provides base cleaning, polyetheramine enhances deposit suspension, and acylated detergent delivers targeted carbon removal, together achieving superior performance that individual additives cannot accomplish alone.
Solution Approach 2:
The invention modifies the chemical composition parameters of fuel additives by introducing acylated detergents with specific molecular structures (containing carboxylic acid or sulfonic acid groups) and adjusting the ratios of different additive components to optimize their effectiveness for GDI engine conditions, which differ from PFI engine requirements.
2Productivity
If GDI engines operate with high fuel injection pressures (450-3000 psi) for improved fuel efficiency and power output, then engine performance increases, but carbon build-up on injectors accelerates due to proximity to combustion chamber
Solution Approach 1:
The additive package performs preliminary cleaning action by preventing carbon deposit formation on injector surfaces before they can accumulate to harmful levels. The detergents in the composition continuously clean the injector during operation, maintaining the high-performance conditions enabled by GDI technology without the deteriorating effect of carbon build-up.
3Object-generated harmful factors
If European emissions standards require particle emissions below 6×10^11 per km, then environmental compliance is achieved, but expensive gasoline particulate filters are needed that may interfere with operability and require servicing
Solution Approach 1:
The patent converts the harmful carbon deposits that normally accumulate in GDI engines into beneficial cleaned surfaces by using the additive package to dissolve and remove deposits chemically. This chemical cleaning approach transforms the problem of deposit formation into a solution where deposits are converted into soluble compounds that can be flushed away, eliminating the need for mechanical filters.
Solution Approach 2:
The invention replaces the mechanical particulate filter system with a chemical cleaning system. Instead of using a physical barrier (filter) to trap particles, the additive package uses chemical reactions (detergent action) to prevent and remove deposit formation, substituting a complex mechanical system with a simpler chemical solution.
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 additive composition effectively prevents or removes carbon deposits in gasoline engines, improving engine performance and reducing emissions, as demonstrated by plots showing the effectiveness of various detergent combinations in maintaining injector cleanliness and reducing particle emissions.
Implementation Method 1
The compositions comprise an acylated detergent, a Mannich detergent, and a polyether and/or polyetheramine... effectively prevents or removes carbon deposits in gasoline engines
Data Source
AI summary
Fuel additive compositions having at least one acylated detergent, at least one Mannich detergent, and at least one polyether and/or polyetheramine. The acylated detergent may be the reaction product of a hydrocarbyl-substituted acylating agent and a nitrogen containing compound having at least one amino group, that may optionally be quaternizable, and at least one oxygen or nitrogen atom capable of reacting with the hydrocarbyl-substituted acylating agent. The compositions are useful for reducing the formation of carbonaceous deposits and/or cleaning carbonaceous deposits in an engine, such as a gasoline direct injection engine.