Straddle-Vehicle Rear Structure for Visible Fuel-Port Lighting
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Solution Overview
Problem
In straddle-type vehicles, positioning the lighting device below the fuel supply port leads to visibility issues and potential fuel adhesion, necessitating costly materials or protective members to prevent lens deterioration.
Innovation Solution
Position the lighting device above or beside a concave housing surrounding the fuel tank or battery, ensuring the lighting device is not below the fuel supply port, and design the fuel supply or charging port to be obliquely upward for easy access, using a simple structure that minimizes fuel adhesion and maintains visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lighting device is disposed below the opening and closing cover, then the lighting device can be positioned in the housing space, but the visibility of the lighting device deteriorates
Solution Approach 1:
The patent transitions the lighting device from a two-dimensional position (below the cover) to a three-dimensional position (above the cover on the rear surface), utilizing vertical space dimensionality to resolve the conflict between accessibility and visibility
2Ease of operation
If the lighting device is disposed below the opening and closing cover, then the housing space can be accessed, but the lighting device may be exposed to fuel and lens deterioration occurs
Solution Approach 1:
The patent extracts the lighting device from the fuel-exposed zone below the cover and relocates it to the fuel-safe zone above the cover, separating the lighting function from the fuel storage environment to eliminate the need for special fuel-resistant materials
3Illumination intensity
If the lighting device is positioned at a high position to ensure visibility, then visibility improves, but the device complexity increases
Solution Approach 1:
The opening and closing cover serves multiple functions: it provides access to the housing space, protects the lighting device from fuel exposure, and establishes the spatial relationship between the lighting device and fuel supply port, eliminating the need for additional protective structures
Data Source
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AI summary
A rear structure of a straddle-type vehicle, in which a fuel tank (35) or a battery is disposed below a seat, includes a lighting device (31) configured to illuminate a vehicle rear side, behind the fuel tank (35) or the battery, and a concave housing (41) surrounding a filler port (37) of the fuel tank (35) or a charging port of the battery. The lighting device (31) is positioned at least one of above the concave housing (41) and on a side of the concave housing (41).