Quaternary Ammonium Additive for Direct Injection Engine Emissions
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Solution Overview
Problem
Direct injection spark ignition engines produce particulate emissions, which are harmful to human health and the environment, and current systems do not effectively monitor or reduce these emissions, with upcoming legislation mandating lower particulate levels.
Innovation Solution
Incorporating a quaternary ammonium compound as an additive in gasoline fuel compositions to combust in direct injection spark ignition engines, reducing particulate emissions through its use as a fuel additive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct injection spark ignition engines are used to improve efficiency and reduce emissions, then engine performance is improved, but particulate emissions increase
Solution Approach 1:
The patent applies the principle of converting harm into benefit by using the quaternary ammonium compound to transform the harmful particulate emissions into a beneficial outcome. The additive modifies the combustion process to reduce particulate formation, and any particulates that are formed are converted into ash that can be effectively managed by the particulate filter, thereby protecting the environment while maintaining engine efficiency.
Solution Approach 2:
The patent applies parameter changes by introducing a quaternary ammonium compound as an additive that alters the chemical composition and combustion characteristics of the fuel. This changes the physical and chemical parameters of the combustion process, including flame temperature, burn rate, and particulate formation, thereby reducing harmful emissions while preserving engine performance.
2Object-generated harmful factors
If particulate filters are installed to reduce particulate emissions, then emissions are reduced, but maintenance and regeneration frequency increase
Solution Approach 1:
The quaternary ammonium compound changes the chemical composition of particulates through its combustion products. This parameter change in particulate composition reduces the frequency and complexity of filter regenerations required, as the modified particulates are more easily managed by the filtration system, thereby reducing maintenance time and operational interruptions.
3Object-generated harmful factors
If fuel additives are introduced to reduce particulate emissions, then emissions are reduced, but fuel composition complexity increases
Solution Approach 1:
The quaternary ammonium compound acts as an intermediary substance that mediates between the fuel and the combustion process. This single-purpose additive simplifies the overall approach compared to multiple additives, as it specifically targets particulate reduction through its unique chemical properties, thereby managing fuel composition complexity while achieving emission reduction goals.
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 use of a quaternary ammonium compound in gasoline fuel compositions effectively lowers particulate emissions from direct injection spark ignition engines, improving engine performance and extending the life of particulate filters, and increasing maintenance and regeneration intervals.
Implementation Method 1
combusting in the engine a gasoline composition comprising as an additive a quaternary ammonium compound
Data Source
AI summary
A method of reducing particulate emissions from a direct injection spark ignition engine, the method comprising combusting in the engine a gasoline composition comprising as an additive a quaternary ammonium compound.