Fuel Injection Valve Support Structure Rotation Prevention
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Solution Overview
Problem
Existing fuel injection valve support structures complicate the shape of the elastic support member with continuous rotation-preventing pieces, increasing processing steps and costs.
Innovation Solution
A fuel injection valve support structure with an elastic support member that includes a base plate with a notch for the valve housing, elastic pieces for contact with the fuel supply cap, and a rotation-preventing protrusion on the synthetic resin formation part to prevent valve rotation without additional pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rotation-preventing pieces are continuously provided on the base plate of the elastic support member, then the fuel injection valve rotation is prevented, but the shape of the elastic support member becomes complicated and processing steps increase
Solution Approach 1:
The rotation-preventing function is extracted from the elastic support member and transferred to a separate rotation-preventing protrusion that is integrally formed with the fuel injection valve. This allows the elastic support member to maintain a simple shape while still achieving rotation prevention through the engagement between the protrusion and the base plate.
Solution Approach 2:
A rotation-preventing protrusion is introduced as an intermediary element between the fuel injection valve and the elastic support member. This protrusion engages with the base plate to prevent rotation, serving as a mediator that enables rotation prevention without requiring complex features on the elastic support member itself.
2Reliability
If rotation-preventing pieces are continuously provided on the base plate, then the fuel injection valve rotation is prevented, but the number of processing steps increases and material yield decreases
Solution Approach 1:
The rotation-preventing protrusion is integrally formed with the fuel injection valve body, merging the rotation-preventing function into the valve structure itself. This eliminates the need for separate processing steps to add rotation-preventing pieces to the elastic support member, thereby improving productivity and material yield.
Solution Approach 2:
The rotation-preventing function is extracted from the elastic support member and assigned to a protrusion on the fuel injection valve. This extraction simplifies the elastic support member manufacturing process while maintaining rotation prevention capability, thus improving overall production efficiency.
3Device complexity
If the elastic support member has a simple shape without continuous rotation-preventing pieces, then processing is simplified and cost is reduced, but the fuel injection valve rotation may occur
Solution Approach 1:
A rotation-preventing protrusion on the fuel injection valve serves as an intermediary element that engages with the simple base plate of the elastic support member. This allows the elastic support member to maintain structural simplicity while the protrusion provides the necessary rotation-preventing function through their engagement.
Solution Approach 2:
Instead of providing rotation-preventing features on the elastic support member, the solution inverts the approach by providing a rotation-preventing protrusion on the fuel injection valve itself. This inversion allows the elastic support member to remain simple while still achieving rotation prevention.
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 stabilizes the fuel injection direction, simplifies the elastic support member design, reduces processing complexity, and lowers production costs by eliminating the need for special rotation-preventing pieces.
Implementation Method 1
elastic pieces each extending from one end of the base plate and resiliently contacting the fuel supply cap
Data Source
AI summary
A fuel injection valve support structure simple in structure is provided which is capable of preventing a fuel injection valve from rotating about an axis of a valve housing thereof without providing a special rotation-preventing piece on an elastic support member. In this support structure, a base plate (15) of an elastic support member (S) is provided with a notch (19) which receives a valve housing (1). A rotation-preventing protrusion (20) which engages with the notch (19) to prevent rotation of a fuel injection valve (I) about an axis (A) of the valve housing (1) is formed on a synthetic resin formation part (6) which covers the valve housing (1) while protruding a coupler (14) to one side.