Injector Fixing Plates for Engine Head
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Solution Overview
Problem
Existing methods for fixing injectors to engine heads face challenges such as lateral thrust generation, increased dimensions, and high costs due to the use of special materials and space occupation, particularly when dealing with different injector configurations and internal fuel supply connectors.
Innovation Solution
A system utilizing two plates with central holes, screwed onto the engine head's lateral threaded holes, ensuring uniform pressure distribution and vertical load on the injector, allowing for easy adaptation with various injector types and reducing manufacturing costs and space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flange with lateral extensions is used to fix the injector, then the injector can be secured to the head, but lateral thrusts are generated on the injector body and the dimensions of the injector body must be increased
Solution Approach 1:
The fixing system is segmented into separate components: the injector body remains compact while the fixing function is provided by external plates with lateral extensions that attach to the head. This separates the injector's primary function from the fixing function, allowing the injector body to maintain smaller dimensions without compromising fixing reliability.
Solution Approach 2:
The plates act as intermediary elements between the injector and the head. Instead of the injector body directly engaging with the head through lateral extensions, the plates serve as mediators that provide the lateral extension function externally, thus avoiding the need to increase injector body dimensions.
2Reliability
If a bracket with ball joint and U-shaped extensions is used to ensure uniform pressure on the injector, then the injector can be properly secured, but the bracket is made of expensive special material and occupies remarkable space on the head
Solution Approach 1:
The system is divided into simple, separate components: standard plates and common screws instead of a single complex bracket. This segmentation allows each component to be manufactured using standard processes and materials, significantly reducing manufacturing costs while maintaining the uniform pressure distribution function.
Solution Approach 2:
The invention replaces expensive special material (sintered steel) with common, inexpensive materials for the plates and screws. These simple components can be easily manufactured and replaced if needed, reducing both initial manufacturing cost and long-term maintenance costs.
3Reliability
If a bracket with ball joint is used to fix the injector, then uniform pressure can be ensured, but the bracket occupies remarkable space on the head
Solution Approach 1:
The fixing function is segmented into two separate plates positioned on opposite sides of the injector, each engaging with recesses on the injector body. This segmentation allows for a more compact arrangement on the head surface compared to a single large bracket, reducing the overall space occupation while maintaining fixing reliability.
Solution Approach 2:
Instead of using a single bracket that occupies significant two-dimensional space on the head, the solution uses two thin plates that extend primarily in one dimension (laterally from the injector). This dimensional change reduces the footprint area on the head surface while maintaining the necessary fixing function.
4Reliability
If a flange with internal fuel supply connector is used, then the injector can be fixed to the head, but the solution is not adaptable to injectors with external fuel supply connectors
Solution Approach 1:
The plates are designed with a universal fixing mechanism that accommodates different injector types. The plates engage with recesses on the injector body and attach to the head, providing a standardized fixing interface that works with both internal and external fuel supply connector configurations. This universal design enhances adaptability while maintaining fixing reliability.
Data Source
Figure 1.1~1.4
Figure 2.1~2.2
Figure 3.1~3.2
AI summary
The present invention refers to a method for fixing an injector to the engine head of a vehicle. The injector (4) comprises two recesses (53) on the opposite sides, and the head comprises a first hole (43) for inserting the injector, and two threaded holes (24) that are lateral with respect to said first hole. The fixing system comprises two plates (21, 22) equipped with central hole (23), configured so that one of their borders (51) directly projects on a lower edge (52) of said recesses placed opposite to them, and so that their central hole (23) corresponds to a respective hole of said two lateral threaded holes (24) in order to be screwed on said head.