Inductor-Integrated Spark Plug Connector for Ignition EMI Reduction
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Solution Overview
Problem
Conventional methods are ineffective in significantly reducing electromagnetic interference emissions in internal combustion engines due to ignition sparks.
Innovation Solution
A spark plug connector with an inductor integrated into the electrical wiring section adjacent to the high-tension lead, which transmits sparking voltage from the ignition coil to the spark plug, effectively reducing electromagnetic interference by positioning the inductor near the spark plug well or valve cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional interference suppression measures are used, then the structure remains simple, but electromagnetic interference emissions are reduced only marginally
Solution Approach 1:
The inductor is integrated directly into the electrical wiring section of the spark plug connector, merging the interference suppression function with the existing voltage transmission path. This combination achieves significant EMI reduction (10-30 dBmV/m) without requiring separate suppression devices or complex additional structures.
Solution Approach 2:
The inductor acts as an intermediary element in the electrical wiring section, selectively blocking high-frequency electromagnetic interference signals while allowing the sparking voltage to pass through. This mediator approach effectively reduces EMI emissions without fundamentally altering the connector's basic structure.
2Object-affected harmful factors
If an inductor is integrated into the electrical wiring section adjacent to the first end portion, then electromagnetic interference emissions are significantly reduced, but the manufacturing complexity increases
Solution Approach 1:
The inductor is merged with the electrical wiring section as an integrated component rather than a separate assembly step. This integration allows the inductor to be manufactured together with the connector body using conventional processes, maintaining manufacturing ease while achieving effective EMI suppression.
Solution Approach 2:
The inductor's position parameter is optimized by placing it adjacent to the first end portion of the connector body, where it can most effectively suppress EMI emissions. This parameter optimization achieves maximum interference reduction with minimal impact on manufacturing processes.
3Object-affected harmful factors
If at least two inductors are arranged adjacent to the first end portion, then electromagnetic interference emission reduction is enhanced, but device complexity increases
Solution Approach 1:
Multiple inductors are merged into the electrical wiring section as integrated elements, arranged adjacently to provide enhanced EMI suppression. This merging approach allows multiple inductors to function together as a unified suppression system without requiring complex individual control or separate mounting structures.
Solution Approach 2:
The electrical wiring section is segmented to include multiple inductors at different positions along the voltage transmission path. This segmentation allows each inductor to address specific frequency ranges or interference sources, enhancing overall EMI reduction while maintaining a relatively simple integrated structure.
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 solution significantly reduces electromagnetic interference emissions during ignition, achieving a 10 to 30 dBmV/m reduction in interference levels compared to conventional suppression methods.
Implementation Method 1
The electrical wiring section has at least one inductor—preferably directly—adjacent to the first end portion... The at least one inductor can also be called an electromagnetic interference suppression element
Data Source
AI summary
Spark plug connector with a connector body, which has a first end portion for inserting an end of a high-tension lead and a second end portion for receiving an end of a spark plug, wherein an electrical wiring section for transmitting a sparking voltage from the high-tension lead to the spark plug is arranged between the first end portion and the second end portion, and wherein the electrical wiring section has, adjacent to the first end portion, at least one inductor; internal combustion engine with at least one arrangement consisting of a spark plug and such a spark plug connector; and arrangement with a device to be driven mechanically and at least one such internal combustion engine for driving the device to be driven mechanically.