Spark Plug Dual Ground Electrode Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spark plugs with wide ground electrodes face challenges in achieving efficient ignition and flame propagation in internal combustion engines, particularly in prechamber gas engines, due to limited accessibility and electrode wear, which affects service life.
Innovation Solution
The design features two parallel, bar-shaped ground electrodes made of precious metals, spaced apart to form a spark gap, allowing for improved ignition and flame propagation, with adjustable spacing to extend service life and efficient metal utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wide ground electrodes are used, then electrode consumption area is large, but accessibility of spark gap and flame propagation are limited
Solution Approach 1:
The ground electrode is divided into multiple separate ground electrode sections (first, second, third sections) that are spaced apart from each other. This segmentation allows the spark gap to be accessible from multiple directions while maintaining a large total electrode consumption area across all sections, thereby resolving the contradiction between service life and spark gap accessibility.
2Productivity
If ground electrodes are spaced apart, then flame propagation is improved, but electrode consumption area is reduced
Solution Approach 1:
By segmenting the ground electrode into multiple spaced-apart sections, the patent achieves both flame propagation improvement (through better mixture accessibility) and service life extension (through increased total electrode consumption area across all sections).
Solution Approach 2:
The ground electrode sections are arranged in a three-dimensional configuration around the center electrode, utilizing spatial dimensions to provide both spacing for flame propagation and sufficient total surface area for extended service life.
3Duration of action of stationary object
If ground electrodes are made short, then service life is extended, but ignition temperature is reduced
Solution Approach 1:
The segmentation into multiple ground electrode sections increases the total effective electrode consumption area, allowing shorter individual sections that can be maintained at lower temperatures while collectively providing sufficient ignition capability and extended service life.
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
This configuration enhances ignition efficiency, extends spark plug service life, and optimizes precious metal usage, making it suitable for prechamber gas engines with robust and long-lasting performance.
Implementation Method 1
The two ground electrodes (11, 12) delimit the spark gap (10) together with the front face (7) of the center electrode (6).
Data Source
AI summary
A spark plug having a center conductor, an insulator surrounding the center conductor, a body surrounding the insulator, and a center electrode connected in an electrically conductive manner to the center conductor, wherein the center electrode delimits a spark gap with its front face. The spark plug has two bar-shaped ground electrodes that are connected in an electrically conductive manner to the body, that delimit the spark gap, and that are adjacent to one another and spaced apart from one another in the region of the spark gap.