Combustion Chamber Electrode Liquid Detection System
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Solution Overview
Problem
Internal combustion engines face damage due to non-compressible liquids like water accumulating in cylinders, leading to increased pressure and potential destruction of engine components, as existing methods rely on visual inspection or complex sensor systems.
Innovation Solution
A simple liquid detection system using two electrodes installed in the combustion chamber, connected to a power supply and measurement unit, with a control unit that compares conductivity measurements to a threshold value to stop the engine's crankshaft rotation if excessive liquid is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual inspection or complex sensor systems are used to detect liquid in cylinders, then detection capability is provided, but device complexity increases and/or detection reliability is insufficient
Solution Approach 1:
The patent replaces complex optical sensors or visual inspection methods with a simple electrical conductivity measurement system. Two electrodes measure the conductivity of combustion chamber contents to detect liquid presence, substituting mechanical/optical detection with electrical measurement for improved reliability and reduced complexity
Solution Approach 2:
The invention detects liquid presence by measuring changes in electrical conductivity parameter of the combustion chamber contents. Liquid contaminants change the conductivity compared to normal combustion gases, providing a simple yet reliable detection mechanism that avoids complex sensor systems
2Ease of operation
If the engine is allowed to rotate freely for starting, then engine operation is maintained, but risk of damage from liquid-induced pressure strokes increases
Solution Approach 1:
The system performs preliminary detection of liquid contaminants in the combustion chamber before allowing the engine to rotate for starting. The conductivity measurement is taken in advance, and only after confirming no liquid presence does the system permit engine rotation, preventing damage while maintaining operational capability
Solution Approach 2:
The invention applies preliminary anti-action by detecting and preventing liquid-induced pressure strokes before they can occur. The conductivity measurement system identifies liquid presence early, blocking the harmful pressure stroke event before it damages engine components during starting rotation
3Device complexity
If simple detection methods are used, then device complexity is reduced, but detection precision and reliability deteriorate
Solution Approach 1:
The patent substitutes simple electrical conductivity measurement for complex detection systems, achieving both low complexity and high precision. The electrical measurement approach provides accurate liquid detection through conductivity changes while maintaining system simplicity
Solution Approach 2:
The invention achieves precise liquid detection by monitoring electrical conductivity parameter changes in the combustion chamber. This simple parameter measurement provides reliable differentiation between liquid contaminants and normal combustion gases, delivering high measurement precision with minimal system complexity
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
Effectively prevents engine damage by reliably detecting conductive liquids and stopping the engine before significant pressure buildup occurs, using a cost-effective and straightforward installation method.
Implementation Method 1
detect conductivity through two electrodes in the combustion chamber
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The invention concerns a liquid detection system of an internal combustion engine (1 ) to detect undesired liquid in at least one cylinder of the engine. The arrangement comprises two electrodes (2, 3) cylinder specifically installed in a combustion chamber (4) of the cylinder (5). The electrodes are connected to a power supply (6) and a measurement part (7) to detect conductivity through two electrodes (2, 3) in the combustion chamber (4).