Electromagnetic Fuel Injector Stroke Regulation via Inverted Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electromagnetic fuel injection valves face difficulties in regulating the stroke of the movable member, making it challenging to assemble and adjust the valve effectively.
Innovation Solution
The solution involves making the maximum outside diameter of the movable member smaller than the minimum inside diameter of the stationary core's through-hole, allowing the movable member to be assembled after the stationary core is fixed, which facilitates easier regulation of the stroke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable member is assembled into the metallic cylindrical-shaped vessel first and then the stationary core is fixed, then the assembly structure is stable, but it is difficult to regulate the movable member in stroke
Solution Approach 1:
The stationary core is fixed to the metallic cylindrical-shaped vessel in advance, creating a stable assembly structure beforehand. This preliminary action allows the movable member to be assembled later through the through-hole of the stationary core, enabling easy stroke regulation without compromising structural stability.
Solution Approach 2:
The conventional assembly sequence is inverted: instead of assembling the movable member first and then fixing the stationary core, the stationary core is fixed first and the movable member is assembled through its through-hole afterward. This inversion resolves the contradiction by enabling stroke regulation while maintaining structural stability.
2Ease of operation
If the stationary core is fixed to the metallic cylindrical-shaped vessel first and then the movable member is mounted through the through-hole, then the movable member stroke can be easily regulated, but the assembly process becomes more complex
Solution Approach 1:
The assembly process is segmented into distinct steps: first fixing the stationary core to the metallic cylindrical-shaped vessel, then separately assembling the movable member through the through-hole. This segmentation simplifies the overall process by breaking it into manageable stages, making stroke regulation easier while controlling complexity.
Solution Approach 2:
The stationary core is preliminarily fixed to the vessel with its through-hole positioned, creating a prepared structure that facilitates subsequent movable member assembly. This preliminary preparation reduces the complexity of the overall assembly process by establishing a clear assembly path.
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 approach simplifies the assembly and adjustment of the movable member's stroke, enhancing the assembly workability and reducing assembly errors, resulting in a more precise and efficient fuel injection valve.
Implementation Method 1
A cylindrical-shaped electromagnetic coil device is mounted to an outer periphery of the metallic cylindrical-shaped vessel and a magnetic path passing through the stationary core and the anchor is formed around the electromagnetic coil device
Data Source
AI summary
An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.