Front Cowl Wind Inlet and Accommodation Layout
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Solution Overview
Problem
The existing design of saddle type vehicles faces challenges in forming a wind inlet portion for the screen above the accommodating portion on the front cowl while maintaining aerodynamic and cooling performance, and ensuring good visibility of side mirrors with a reduced number of parts.
Innovation Solution
The saddle type vehicle is configured with a pair of accommodating portions on the front cowl, where the lids are mounted for opening and closing movement by hinges on the inner walls, allowing the wind inlet portion to be formed centrally, enhancing aerodynamic and cooling performance, and the side mirrors are positioned to the left and right of the center, reducing the number of parts and improving visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the accommodating portion is positioned centrally on the front cowl, then the structure is simplified, but the wind inlet portion cannot be formed centrally above it, compromising aerodynamic and cooling performance
Solution Approach 1:
The front cowl is divided into multiple accommodating portions (first, second, third, and fourth accommodating portions) positioned at different locations (central, left, right sides) rather than a single central accommodating portion. This segmentation allows the wind inlet portion to be formed centrally between these distributed accommodating portions, resolving the contradiction between structural simplicity and aerodynamic performance.
2Reliability
If the wind inlet portion is formed centrally for aerodynamic performance, then cooling efficiency improves, but the structure becomes complicated due to waterproof requirements and multi-component assembly
Solution Approach 1:
Multiple accommodating portions (first, second, third, fourth) are merged into a unified front cowl structure with integrated lids and hinges. The wind inlet portion is formed by the spatial arrangement of these merged components, allowing central positioning for optimal cooling while maintaining structural integration and simplicity.
3Device complexity
If side mirrors are positioned centrally, then the number of parts is reduced, but visibility is compromised; if positioned laterally, visibility improves but requires additional mounting structures
Solution Approach 1:
The front cowl is designed with different functional zones: central accommodating portions for storage, lateral accommodating portions for mirror mounting, and a central wind inlet portion. This local differentiation allows side mirrors to be positioned laterally on the third and fourth accommodating portions for optimal visibility while integrating them into the overall streamlined structure, avoiding the need for separate mounting brackets.
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 allows for improved operability of the accommodating portions, reduced aerodynamic drag, and enhanced visibility of side mirrors, while maintaining a streamlined design and simplifying maintenance of electric components.
Implementation Method 1
A wind inlet portion for a screen is formed in order to moderate the pressure difference between an occupant and a front cowl which is generated upon high speed traveling of a motorcycle
Implementation Method 2
The wind inlet portion is sometimes used to cool a part disposed centrally in the vehicle widthwise direction
Data Source
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AI summary
A saddle type vehicle including a vehicle body frame, a steering shaft supported for rotation at a front end of the vehicle body frame and configured to steer a front wheel (3), a front cowl (40) disposed around the steering shaft and covering a front portion of a vehicle body, a pair of accommodation portions (49L, 49R) provided on the front cowl (40) and disposed in left and right pair and a wind inlet portion (39S) of a screen (39) provided so as to be erected uprightly from the front cowl (40) which is disposed between the left and right accommodation portions (49L, 49R).