Radiator Shroud Extending Portion for Wind Flow Guidance
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Solution Overview
Problem
Conventional shroud structures for saddle-ride vehicles, such as motorcycles, face inefficiencies in wind guiding due to turbulent airflow caused by the angle of the inner surface of the shrouds and the design of the terminal ends, which hinders effective wind regulation and cooling efficiency.
Innovation Solution
The shroud structure incorporates an extending portion that is partially bent and extended forward and inward from the main body front portion, forming a flow-regulating surface to guide wind efficiently to the radiator while also serving as a guide surface for the rider's leg, with inclined surfaces and strategically placed slits to minimize turbulence and crosswind resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the front ends of the shrouds simply expand outward, then the structure is simple and easy to manufacture, but the wind guiding efficiency deteriorates due to turbulent airflow hitting the inner surfaces
Solution Approach 1:
The shroud front end is divided into multiple functional sections: an extending portion that protrudes forward from the main body, and a terminal portion that is bent inward. This segmentation allows each part to perform its specific function - the extending portion guides wind flow while the terminal portion regulates airflow direction, preventing turbulence without requiring complex overall structure
Solution Approach 2:
The terminal portion of the front end is designed with a curved inward bend rather than a straight configuration. This curvature smoothly redirects the wind flow that has passed by the front forks, preventing abrupt changes in flow direction that would cause turbulence. The curved surface guides wind efficiently into the radiator while maintaining simple manufacturing processes
2Productivity
If the terminal portions of the front ends are bent inward, then wind regulation is improved, but the degree of bending in conventional designs is insufficient to achieve significant improvement in regulation efficiency
Solution Approach 1:
The inward bend is applied specifically to the terminal portion of the extending section, not the entire shroud structure. This localized application of the bending feature concentrates the wind regulation function where it is most needed - at the point where wind flow enters the shroud and needs to be directed toward the radiator - while keeping the rest of the shroud structure simple and easy to manufacture
3Productivity
If the shroud structure is designed to guide wind efficiently, then cooling performance improves, but the guide surface area for rider's leg movement is reduced
Solution Approach 1:
The extending portion of the shroud front end serves multiple functions simultaneously: it acts as a wind guide surface that directs airflow toward the radiator, and it provides a guide surface for the rider's leg during cornering. This multi-functionality allows the shroud to improve cooling efficiency while maintaining adequate leg guidance capability without requiring separate structures for each function
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 design enhances wind guiding efficiency, maximizes wind flow to the radiator, and facilitates leg movement by increasing the guide surface area without affecting the vehicle's performance, while also reducing crosswind resistance during cornering.
Implementation Method 1
forming a flow-regulating surface to guide wind efficiently to the radiator... to minimize turbulence
Data Source
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AI summary
Radiators (38) are disposed behind front forks (12) and a front fender (42) supported between the front forks (12), and sides of the radiators (38) are covered with shrouds (40). The shrouds (40) each include a main body front portion (52) expanding outward, and an extending portion (50) extending toward an inner side of a vehicle is provided in front of an outermost portion (70) of the main body front portion (52). A front end portion (60) of the extending portion (50) laterally overlaps the front forks (12). Since a traveling wind WD passing outside the front forks (12) directly enters the inside of the extending portion (50) to be guided, the traveling wind WD is prevented from becoming turbulent and wind guiding efficiency is improved. Moreover, a guide surface for leg is made larger by the extending portion (50).