Aqueous Composition for Intake Valve Deposit Reduction
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Solution Overview
Problem
Direct injection spark ignition engines face issues with intake valve deposits, leading to poor air-flow, increased emissions, and engine knock, which existing technologies have not effectively addressed, especially since there is no direct fuel washing mechanism to mitigate these issues.
Innovation Solution
Introducing an aqueous-based composition comprising water, a freezing point suppression agent, a surfactant, and an amine compound into the engine to create a washing action on the intake valves, reducing deposits and controlling engine knock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If direct injection spark ignition engines are used to improve fuel efficiency and power, then engine performance is improved, but intake valve deposits form leading to poor air-flow and increased emissions
Solution Approach 1:
An aqueous-based composition is introduced as an intermediary substance between the fuel system and intake valves. This composition contains surfactants and detergents that actively clean deposits from intake valves, mediating the harmful interaction between direct injection operation and valve contamination
Solution Approach 2:
The invention changes the chemical parameters of the fuel system by introducing an aqueous-based composition with specific chemical properties (surfactants, detergents, corrosion inhibitors). These parameter changes enable the composition to dissolve and remove deposits that would otherwise accumulate on intake valves
2Object-generated harmful factors
If port fuel injection is used to provide fuel washing on intake valves, then intake valve deposits are reduced, but the technology cannot be applied to direct injection engines
Solution Approach 1:
The aqueous-based composition is designed to perform multiple functions: it cleans intake valves like port fuel injection, while also being compatible with direct injection systems. The composition serves as both a cleaning agent and a fuel additive that can be introduced through the existing fuel system of direct injection engines
3Object-affected harmful factors
If water injection is used to control engine knock, then knock is reduced, but intake valve deposits are not effectively addressed
Solution Approach 1:
The invention merges two previously separate functions into a single aqueous-based composition: knock control (through water injection mechanisms) and intake valve cleaning (through surfactant and detergent chemistry). This combined approach simultaneously addresses both harmful effects
4Object-generated harmful factors
If existing aqueous-based compositions are used, then some deposit reduction is achieved, but freezing point issues and insufficient deposit removal occur
Solution Approach 1:
The invention uses a composite aqueous-based composition containing multiple components working together: surfactants for deposit removal, detergents for cleaning, corrosion inhibitors for protection, and freezing point depressants for temperature stability. This composite formulation achieves both effective deposit reduction and reliable freezing point control
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 method effectively reduces intake valve deposits by up to 50% and simultaneously controls engine knock, improving engine efficiency and reducing emissions in both direct injection and port fuel injection spark ignition engines.
Implementation Method 1
from 0 vol % to 10 vol % of surfactant
Implementation Method 2
Introducing an aqueous-based composition comprising water, a freezing point suppression agent, a surfactant, and an amine compound into the engine to create a washing action on the intake valves
Implementation Method 3
from 0 vol % to 40 vol % of freezing point suppression agent
Implementation Method 4
an amine compound in a blending amount of from 0 ppmw to 1000 ppmw
Data Source
AI summary
Method for reducing intake valve deposits in a spark ignition internal combustion engine which is fuelled with a gasoline fuel composition, wherein the method comprises introducing into the engine an aqueous based composition, wherein the aqueous based composition comprises (i) water, (ii) from 0 vol % to 40 vol % freezing point suppression agent, (iii) from 0 vol % to 10 vol % of surfactant, and (iv) an amine compound in a blending amount of from 0 ppmw to 1000 ppmw.