Vertically Long Windshield Airflow Guide for Front Cowl Miniaturization
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Solution Overview
Problem
Saddle-ride type vehicles face challenges in miniaturizing the front cowl while maintaining air flow rate and avoiding weight increase, as enlarging the air introduction port to improve air flow results in increased weight due to the need for a wider cowl.
Innovation Solution
A vertically long windshield with an opening below its center and a guide member directs first traveling air along its back surface, with right and left side guide surfaces and notches to control air flow, and inclined edges and pieces to direct air inward, minimizing the need for a wider front cowl and ensuring efficient air introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air introduction port is enlarged to increase air flow rate, then the vacuum correction is improved, but the front cowl must be widened which increases its weight
Solution Approach 1:
The invention transitions from horizontal air introduction (enlarging the air introduction port width) to vertical air introduction (forming an air introduction passage extending in the vehicle width direction). This dimensional change allows sufficient air flow rate without increasing the front cowl's overall width, thereby avoiding weight increase while maintaining vacuum correction effectiveness
2Weight of moving object
If the front cowl is miniaturized to reduce weight, then the vehicle weight is reduced, but the air introduction capability is compromised
Solution Approach 1:
The invention creates a localized air introduction passage within the front cowl structure that extends in the vehicle width direction. This localized three-dimensional passage provides sufficient air introduction capability without requiring the entire front cowl to be enlarged, enabling miniaturization while maintaining air flow 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
This design allows for miniaturization of the front cowl, maintains air flow rate, and reduces windshield weight by optimizing windbreak performance and air flow direction, thereby correcting excessive vacuum on the windshield.
Implementation Method 1
a guide member is configured to allow first traveling air from the opening to flow along a back surface of the windshield
Implementation Method 2
the windshield stay is provided with right and left side guide surfaces for sandwiching the guide member and suppressing dispersion of the first traveling air in the vehicle width direction
Implementation Method 3
the notches have inclined edges provided above the notches and inclined in order to be heightened outward in the vehicle width direction, the front cowl has inclined pieces in positions behind the inclined edges, the inclined pieces being bent rearward of the vehicle along ridge lines substantially parallel to the inclined edges, and third traveling air flowing along the inclined edges is directed to the center of vehicle width by the inclined pieces
Data Source
AI summary
A saddle-ride type vehicle is capable of achieving miniaturization of a front cowl while ensuring a flow rate of air introduction. An opening penetrating through a longitudinal direction of a vehicle is formed below the center in a height direction of a vertically long windshield. First traveling air is passed through the opening formed in the windshield. A direction of the first traveling air is then changed by a guide member, and is moved upward along a back surface of the windshield. Excessive vacuum on the back surface of the windshield is corrected. Since an opening is formed in the windshield, it is not necessary to increase a width of the front cowl, and miniaturization of the front cowl can be achieved. Since the windshield is formed as a vertically long windshield, the opening can be formed to be vertically long, and an opening area can be ensured.