Annular Ground Electrode Spark Plug for Better Heat Dissipation
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Solution Overview
Problem
Existing gas engine spark plugs have complex designs with numerous components and assembly challenges, which hinder optimal ignition, especially with lean combustion gas mixtures, and require optimization for reduced manufacturing costs and improved heat dissipation.
Innovation Solution
A gas engine spark plug design featuring a sleeve-shaped housing with a ground electrode that is annular or ring-section-shaped and directly connected to the spark plug housing, eliminating the need for a separate carrier body, allowing for improved heat dissipation and reduced component count, with a structurally simple and stable configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate carrier body is used to attach the ground electrode to the spark plug housing, then the ground electrode can be securely mounted, but the device complexity increases and manufacturing costs rise
Solution Approach 1:
The patent merges the carrier body function directly into the spark plug housing by integrating a carrier recess into the housing structure. The ground electrode is then directly attached to the housing through this recess, eliminating the need for a separate carrier body component. This integration reduces the total component count while maintaining secure mounting of the ground electrode.
2Ease of manufacture
If multiple components and joints are used in the spark plug design, then functional requirements can be met, but manufacturing costs increase and heat dissipation is reduced
Solution Approach 1:
The patent reduces the number of joints and components by integrating the carrier function into the housing and using direct attachment methods. Fewer joints mean reduced thermal resistance paths, allowing heat from the electrodes to dissipate more efficiently through the housing to the cooling medium, thereby improving heat dissipation efficiency while still meeting all functional requirements.
3Reliability
If a complex assembly structure is used, then reliable component attachment is achieved, but the number of welding joints increases and manufacturing costs rise
Solution Approach 1:
The patent extracts the carrier body as a separate component and integrates its function directly into the spark plug housing structure through a carrier recess. This eliminates the need for additional welding joints between separate carrier and housing components, reducing manufacturing complexity and cost while maintaining reliable attachment of the ground electrode through the 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
This design achieves efficient ignition with fewer components and joints, enhances heat dissipation, and reduces manufacturing costs, leading to improved service life and reliability of the gas engine spark plug.
Implementation Method 1
improved heat dissipation can be achieved, which extends the service life of the gas engine spark plug. With the proposed design, a thermal conductivity of approximately 50 W/(m*K) (watts per meter and Kelvin) can be achieved at the spark plug housing
Data Source
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AI summary
The invention relates to a gas engine spark plug (10), comprising a spark plug housing (18), a center electrode (36) and a ground electrode (38), wherein the ground electrode (38) is designed in an annular or annular segment shape and at least partially surrounds the center electrode (36) to the outside, wherein the ground electrode (38) is directly connected to the spark plug housing (18).