Motorcycle Canister Positioning for Short Communication Pipes
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Solution Overview
Problem
The existing motorcycle designs face challenges in easily mounting and handling the communication pipe connecting the canister and the combustion engine air intake passage due to cumbersome pipe operations and complex handling procedures.
Innovation Solution
The motorcycle configuration includes a canister positioned between the head pipe and the fuel tank, with the communication pipe supported by the throttle body and combustion engine, allowing for shorter pipe lengths and stable support, enabling easier installation and handling by positioning the canister above the combustion engine and between the main frame pieces, and incorporating a heat shield to protect it from radiator exhaust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the canister is disposed inside the fairing, then the canister is protected and integrated into the motorcycle body, but the communication pipe becomes long and difficult to handle during assembly
Solution Approach 1:
The canister is repositioned from the fairing (front lateral position) to the space between the head pipe and fuel tank (central upper position), changing its spatial dimension. This relocation shortens the communication pipe length and simplifies assembly operations while maintaining system integration.
Solution Approach 2:
The communication pipe is pre-assembled with the combustion engine as a unit before installation onto the motorcycle. This preliminary assembly action eliminates the need to handle and install the long communication pipe separately after engine mounting, significantly simplifying the assembly process.
2Stability of the object's composition
If the communication pipe is installed after the combustion engine is mounted, then the engine assembly remains intact, but the pipe installation becomes cumbersome and time-consuming
Solution Approach 1:
The communication pipe is pre-assembled with the combustion engine as an integrated unit before mounting onto the motorcycle. This preliminary action eliminates the need for separate pipe installation steps, reducing assembly time while maintaining engine assembly integrity.
Solution Approach 2:
The communication pipe installation is merged with the combustion engine assembly process. By integrating the pipe assembly into the engine unit beforehand, the pipe installation becomes a seamless part of engine mounting, eliminating time-consuming separate installation steps.
3Adaptability or versatility
If the canister is positioned far from the fuel tank and throttle body, then there is more space for other components, but the communication pipe length increases and handling becomes difficult
Solution Approach 1:
The canister is repositioned to utilize the vertical space between the head pipe and fuel tank, rather than being placed in the lateral fairing area. This dimensional change optimizes space utilization while minimizing communication pipe length to approximately 100mm.
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 configuration simplifies pipe handling, reduces installation complexity, and enhances cost-effectiveness by shortening pipe lengths, while ensuring stable support and protection from heat sources, thus improving the overall assembly and operational efficiency.
Implementation Method 1
a canister (69) containing an adsorbent which adsorbs fuel evaporative gas from the fuel tank (15)
Data Source
Figure 1
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Figure 3
AI summary
A motorcycle comprising a fuel tank (15) which is disposed between a head pipe (4) and a rider's seat, a combustion engine (E) which is disposed below the fuel tank (15), and a canister (69) which is disposed between the head pipe (4) and the fuel tank (15) wherein a check valve (74) is disposed on a communication pipe unit (72) which connects the canister (69) and an air intake passage (45) and both ends (120a, 120b) of a first communication pipe (120) are supported by the combustion engine (E) through a throttle body (44) and the check valve (74), respectively.