Fuel Distribution Pipe Stiffness via Plate Restricting Member
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Solution Overview
Problem
Existing fuel supply devices for internal combustion engines face challenges in mass productivity due to complex machining requirements and displacement issues of fuel piping, which affect stiffness and efficiency.
Innovation Solution
A fuel supply device featuring a fuel distribution pipe supported by a restricting member formed from a plate material in a bowl shape, with a recess and through hole to avoid interference and enhance fixation, using fastening members to secure the restricting member to the support part, ensuring strong fixing while maintaining mass productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the fuel distribution pipe is formed into a long block shape to ensure stiffness, then the stiffness is improved, but the machining complexity increases and mass productivity deteriorates
Solution Approach 1:
The fuel distribution pipe is divided into a pipe body and a separate restricting member. The pipe body maintains a simple cylindrical shape for easy mass production, while the restricting member (formed from plate material) is separately attached to provide the necessary stiffness and displacement suppression functionality.
Solution Approach 2:
The stiffness-providing function is extracted from the pipe body and implemented as a separate restricting member. This allows the pipe body to be manufactured simply as a cylindrical pipe while the restricting member provides the necessary structural rigidity through its plate material construction and mounting configuration.
2Stability of the object's composition
If a separate restricting member is mounted on the support part to suppress displacement, then the displacement suppression is improved, but the device complexity increases
Solution Approach 1:
The restricting member serves multiple functions simultaneously: it suppresses pipe displacement, provides structural stiffness, and acts as a mounting interface for fastening to the support part. This multi-functionality reduces the need for separate components and simplifies the overall device structure.
Solution Approach 2:
The restricting member is designed to perform multiple roles: displacement suppression, stiffness provision, and fastening interface. By consolidating these functions into a single component, the device complexity is minimized while achieving the desired stability and structural performance.
3Productivity
If the fuel distribution pipe is made from pipe material for mass productivity, then the manufacturing efficiency is improved, but the displacement control deteriorates
Solution Approach 1:
The system is segmented into a pipe body made from pipe material for easy mass production and a separate restricting member made from plate material for displacement control. This segmentation allows each component to be optimized for its specific manufacturing process while working together to achieve both productivity and stability goals.
Solution Approach 2:
The restricting member acts as an intermediary between the simple pipe body and the support part. It provides the necessary displacement control and structural connection while allowing the pipe body to maintain its simple cylindrical form for mass production, thus mediating between manufacturing efficiency and positional stability requirements.
Data Source
AI summary
A fuel supply device for an internal combustion engine includes a plurality of fuel injection valves that are disposed side by side in an engine main body or in an intake system component forming part of an intake system, and a fuel distribution pipe that is connected in common to the fuel injection valves and supported via a support part provided on the intake system component or on the engine main body, wherein the fuel distribution pipe is formed from a pipe material, and a restricting member that is a separate member from the fuel distribution pipe is mounted on the support part at a position adjacent to the fuel distribution pipe so as to abut against the fuel distribution pipe to suppress displacement of the fuel distribution pipe from the support part. Thus, it is possible to suppress displacement of fuel piping while ensuring the mass productivity.