High Pressure Fuel Delivery Pipe Assembly Mounting Bracket
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Solution Overview
Problem
The high pressure fuel delivery pipe assembly for direct injection engines faces increased manufacturing costs and reduced positioning precision due to separately assembled fuel injector sockets and mounting bosses, leading to difficulties in assembly and potential fuel leakage.
Innovation Solution
A high pressure fuel delivery pipe assembly featuring a mounting bracket made of sheet metal with a mounting plate and reinforcement bracket, which includes a mounting hole, a through hole for the fuel injector socket, and a reinforcement rib, enhancing positional precision and stability by distributing the upward reaction force and resisting engine vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If mounting bosses are manufactured by cut-machining and separately assembled with the conduit, then the assembly structure is simple, but the manufacturing cost increases due to increased material cost and machining cost
Solution Approach 1:
The mounting boss and fuel injector socket are merged into a single integrated component. The mounting boss is formed with a through-hole that directly receives the fuel injector socket, eliminating the need for separate manufacturing and assembly operations. This integration reduces both material cost and machining cost while maintaining the simple assembly structure.
2Ease of manufacture
If mounting bosses are separately assembled with the conduit, then the manufacturing process is simple, but the positioning precision of component parts becomes very difficult to enhance
Solution Approach 1:
By integrating the mounting boss and fuel injector socket into a single component with a built-in through-hole, the positioning precision is significantly improved. The through-hole provides precise alignment features during assembly, ensuring accurate positioning of the fuel injector socket relative to the conduit. This eliminates positioning errors that would occur with separate assembly operations.
3Ease of operation
If fuel injector sockets are separately assembled with the conduit, then the assembly process is straightforward, but the mounting precision to the engine head becomes difficult to achieve
Solution Approach 1:
The integrated mounting boss with through-hole provides built-in positioning features that ensure precise mounting of the fuel injector socket to the engine head. The through-hole acts as a guide during assembly, maintaining accurate positioning throughout the assembly process and ensuring proper alignment with the engine head mounting surfaces.
4Device complexity
If separate assembly of fuel injector sockets and mounting bosses is used, then the component design is simple, but fuel leakage may occur due to poor positioning precision
Solution Approach 1:
The integrated design of the mounting boss with the fuel injector socket ensures precise positioning and secure mounting, preventing fuel leakage. The through-hole provides accurate alignment and the integrated structure eliminates gaps or misalignments that could occur with separate assembly, ensuring reliable sealing between the fuel injector socket and the conduit.
Data Source
AI summary
A fuel delivery pipe assembly for direct injection of fuel includes a fuel delivery pipe, a plurality of fuel injector sockets for containing a fuel injection valve, and a mounting bracket of sheet metal fixedly assembled with the fuel delivery pipe at a position adjacent each fuel injector socket. The mounting bracket has a mounting plate portion formed with a mounting hole for insertion of a bolt and a through hole for insertion of each fuel injector socket spaced from the mounting hole in the longitudinal direction of the delivery pipe. A reinforcement bracket is integrally assembled with the mounting bracket at the opposite side of the fuel injector socket in the longitudinal direction of the delivery pipe, and a reinforcement rib extended from an arm portion of the reinforcement bracket is provided on the mounting plate portion between the mounting hole and the through hole for the fuel injector socket.