Front Fender Step Parts Guide Wind to Engine
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Solution Overview
Problem
Existing front fender designs for saddle-type vehicles with raised front fenders and rear-mounted engines and radiators face issues with wind guidance, as the wind guide paths can become clogged with mud and debris, leading to increased weight and complexity.
Innovation Solution
A front fender with a reverse U-shaped section and step parts extending from the left and right end parts, forming a gradual height difference and angled extensions that guide wind efficiently to the engine and radiators, reducing clogging risks and maintaining a simple, lightweight structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wind guide path with an opened orifice is provided on the lower surface side of the front fender to guide wind to the engine, then wind guidance performance is improved, but the orifice is readily clogged by mud and debris requiring additional countermeasures that increase weight and part count
Solution Approach 1:
Instead of opening the wind guide orifice on the lower surface of the front fender (conventional approach), the invention inverts the approach by forming the wind guide path on the upper surface side of the front fender. The wind guide recess is formed on the upper surface, and the wind guide protrusion extends from the lower surface, creating a wind guide path that is not readily clogged by mud and debris while still effectively guiding wind to the engine and radiators.
2Reliability
If countermeasures are added to prevent clogging of the wind guide orifice by mud and debris, then reliability is improved, but weight and part count increase
Solution Approach 1:
The invention eliminates the need for additional countermeasures by inverting the wind guide path configuration. By forming the wind guide recess on the upper surface and the wind guide protrusion on the lower surface, the design inherently prevents clogging without requiring guards, covers, or other protective components that would increase weight and part count.
3Shape
If the front fender is raised to improve aesthetic appearance and aerodynamics, then vehicle appearance and wind flow are improved, but it becomes difficult to guide wind to the engine and radiators disposed on the rear side
Solution Approach 1:
The front fender is segmented into distinct functional zones: the wind guide recess on the upper surface for capturing and directing wind, the wind guide protrusion on the lower surface for channeling wind downward, and the stepped configuration that creates multiple flow paths. This segmentation allows the raised fender design to effectively guide wind to the engine and radiators while maintaining aesthetic appearance and aerodynamic performance.
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
The design effectively directs wind to the engine and radiators, enhancing cooling performance while minimizing weight and part count, improving rigidity and mud guard performance without increasing complexity.
Implementation Method 1
the step parts are formed to extend from a front part of the front fender toward an upper rear side along an upper edge contour line in side view of the front fender and then extend toward a lower rear side at a part near the front side of the fork tubes
Data Source
AI summary
A front fender that can guide a relative wind to an engine while suppressing increases in the weight and the number of parts. The front fender includes a main body part having a substantially reverse U-shaped section opened downward and step parts extending from left and right end parts of this main body part toward both lateral sides, at least at a part of the front fender on the front side relative to left and right fork tubes. The step parts are formed to extend from a front part of the front fender toward the upper rear side along an upper edge contour line in side view of the front fender and then extend toward the lower rear side at a part near the front side of the fork tubes.