Ignition Plug Positioning Zone for Semiconductor Wear Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ignition plugs with semiconductor elements experience rapid wear, leading to reliability issues and short lifespans, which affects the reliability of engine ignition, particularly in critical applications like military engines where rapid combustion is essential, and maintenance costs are high.
Innovation Solution
A method to determine the optimum positioning zone for an ignition plug with a semiconductor element by using a test tool to measure fuel flow rates at different locations within the combustion chamber, ensuring the semiconductor face is not fully covered between sparks, thereby minimizing wear, and a test tool with an absorbent end-piece to collect fuel for accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ignition plugs with semiconductor elements are used to generate sparks from low power voltages, then the ignition unit and connecting wires become lighter and more reliable, but the semiconductor elements wear rapidly leading to malfunctions and short lifespans
Solution Approach 1:
The patent applies preliminary action by determining the optimum positioning zone of the ignition plug before actual installation. Through test ignition tests and measurements of fuel collected at the semiconductor face, the method identifies positions where fuel coverage remains below the critical threshold even under maximum fuel flow conditions. This preliminary determination ensures that when the plug is installed in the determined zone, it automatically operates within safe parameters, preventing rapid wear before it occurs.
2Reliability
If the semiconductor element is positioned to ensure adequate fuel coverage for ignition, then ignition effectiveness is maintained, but the semiconductor element becomes fully covered with fuel between sparks causing excessive wear
Solution Approach 1:
The patent applies parameter changes by transforming the positioning problem from a geometric consideration to a fuel flow rate-based parameter. The method determines positions where the fuel coverage parameter remains below a critical threshold (e.g., 80-90% coverage) under maximum fuel flow conditions. By changing the approach from ensuring adequate coverage for ignition to controlling maximum coverage to prevent wear, the patent simultaneously achieves reliable ignition and extended element lifespan through parameter optimization.
3Productivity
If fuel flow rate is increased to ensure proper combustion, then combustion effectiveness is improved, but the semiconductor element becomes fully covered with fuel leading to rapid wear and malfunction
Solution Approach 1:
The patent applies feedback by using the results of test ignition tests to inform the positioning decision. The method measures the actual fuel collected at the semiconductor face during test operations and uses this feedback to determine whether the position is within the optimum zone. This feedback loop allows the system to account for actual fuel flow conditions and adjust positioning accordingly, ensuring that high fuel flow rates for effective combustion do not lead to excessive wear.
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 significantly extends the lifespan of ignition plugs by preventing excessive fuel coverage, enhancing reliability and reducing maintenance costs, especially in critical engine applications by ensuring the semiconductor element remains partially dry between sparks.
Implementation Method 1
The test tool (40) includes an end-piece (41) which contains an element (42) made of an absorbent material
Data Source
AI summary
A method for determining an optimum positioning zone of an ignition plug fitted with a semiconductor element in a combustion chamber is provided. The method includes: determining, using a test ignition plug, of an optimum fuel flow rate value intended to ensure optimum long-term operation of the ignition plug; successively measuring quantities of fuel collected at the surface of one end of a test tool positioned in the combustion chamber in successive test ignition tests; determining the fuel flow rate values corresponding to the measured quantities of fuel; comparing the fuel flow rate values and of the optimum fuel flow rate value, and determining the optimum positioning zone following the comparing.