Auxiliary Chamber Engine Assembly With Threaded Partition and Spacer
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Solution Overview
Problem
Existing methods for producing engines with auxiliary chambers, such as casting or laser welding, result in increased production costs.
Innovation Solution
A method involving a partition member with a cylindrical body and hemispherical end portion, a spacer with matching threads, and a spark plug, allowing for easy assembly by screwing the threads together to form a spherical-shaped auxiliary chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If casting or laser welding is used to form the auxiliary chamber, then the auxiliary chamber can be formed with a shape close to spherical, but production costs increase
Solution Approach 1:
The partition member is divided into multiple segments (first partition member and second partition member) that can be assembled together using screw connections. This segmentation allows the spherical auxiliary chamber to be formed through simple assembly operations rather than complex casting or welding processes, reducing production costs while maintaining the desired spherical shape.
Solution Approach 2:
The auxiliary chamber is formed by nesting the first and second partition members together with the auxiliary chamber formation portion, creating a spherical cavity through assembly of nested components. This approach enables the spherical shape to be achieved through modular assembly rather than monolithic manufacturing, simplifying the production process.
2Shape
If the partition member is divided into two parts intersecting the cylinder central axis, then the auxiliary chamber can be formed, but the structural complexity increases
Solution Approach 1:
The partition member is segmented into first and second partition members that are connected through screw connections. This segmentation allows the complex spherical auxiliary chamber to be formed by assembling simpler individual components, reducing the manufacturing complexity of each part while achieving the overall complex shape through assembly.
Solution Approach 2:
The first and second partition members are prepared in advance with predetermined shapes and screw connection portions, allowing the auxiliary chamber to be formed by simple assembly operations. This preliminary preparation of components simplifies the overall manufacturing process compared to forming the complete structure in one operation.
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
Enables the production of engines with a spherical-shaped auxiliary chamber at reduced costs through simplified assembly operations.
Implementation Method 1
a first step of attaching the spacer to an inside of the body of the partition member by screwing the first external thread of the spacer and the internal thread of the body of the partition member to each other
Implementation Method 2
a second step of, after the first step, attaching the spark plug to the partition member by screwing the second external thread of the spark plug and the internal thread of the body of the partition member to each other
Data Source
AI summary
A method of producing an engine including a partition member, a spacer, and a spark plug includes: a first step of attaching the spacer to an inside of a body of the partition member by screwing a first external thread of the spacer and an internal thread of the body of the partition member to each other; and a second step of, after the first step, attaching the spark plug to the partition member by screwing a second external thread of the spark plug and the internal thread of the body of the partition member to each other.