Canister Disposing Structure for Saddle Riding Vehicle
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Solution Overview
Problem
Existing canister disposing structures for saddle riding vehicles are prone to performance degradation due to dust and water ingress, and have complex piping configurations that increase costs and reduce durability.
Innovation Solution
A canister disposing structure where the canister is positioned under a tank cover that extends forward and upward, with a fresh air introducing port within the tank cover space, and a drain pipe merging with the supplied-fuel drain pipe to prevent exposure and simplify piping, while being supported by the fuel tank and vehicle body frame for enhanced durability and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fresh air introducing pipe is connected to the canister, then fresh air can be introduced into the canister, but dust and water may enter the canister through the pipe
Solution Approach 1:
The invention removes the fresh air introducing pipe from the system and instead opens the fresh air introducing port directly to the space formed by the tank cover. This extraction of the pipe eliminates the pathway for dust and water ingress while maintaining the canister's fresh air introduction function through the port opening.
Solution Approach 2:
The tank cover space acts as an intermediary chamber between the external environment and the canister. Fresh air is introduced through the port into this intermediate space, which then supplies air to the canister, preventing direct exposure to dust and water while maintaining airflow functionality.
2Reliability
If the drain pipe extends downward from the tank cover, then liquid can be drained from the canister, but the pipe becomes exposed to the outside environment
Solution Approach 1:
The invention merges the drain pipe with the supplied-fuel drain pipe, combining two drainage functions into a single piping system. This integration allows liquid drainage from the canister while routing the pipe through the fuel tank structure, preventing exposure to the external environment and simplifying the overall piping configuration.
3Reliability
If the canister is supported to the tank cover, then the canister is securely positioned, but the tank cover structure becomes more complex
Solution Approach 1:
The tank cover is designed to serve multiple functions: it covers the fuel tank, forms a space for the canister, provides the fresh air introducing port, and supports the canister weight. By making the tank cover a multi-functional component, the invention eliminates the need for separate support structures, reducing overall device complexity while maintaining secure canister positioning.
Data Source
AI summary
A canister includes a fresh air introducing port for introducing a fresh air into the canister. The fresh air introducing port is opened in a space formed by at least a tank cover. The canister is connected to a drain pipe for draining a liquid in the canister to the outside of the canister. The drain pipe extends rearward at a height same as or higher than a lower end of the tank cover. The drain pipe merges with a supplied-fuel drain pipe and extends to a lower portion of a vehicle. The supplied-fuel drain pipe drains a fuel around a fuel supply port of a fuel tank.