Movable Motorcycle Windscreen Airflow Management
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Solution Overview
Problem
Existing motorcycle windshield structures fail to provide optimal comfort at both high and low speeds due to inefficient air management, leading to negative pressure issues and discomfort for passengers, as they either exhaust air constantly at low speeds or require additional air introduction ports.
Innovation Solution
A vertically movable windshield with a varying mechanism that adjusts its position, angle, and shape, incorporating an air introduction port and exhaust system to control airflow, ensuring proper airflow management by altering the overlap area with the air introduction port and reducing the cross-sectional area of ventilation passages to alleviate negative pressure and enhance comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an air introduction port is provided to alleviate negative pressure, then passenger comfort is improved at high speed, but the structure becomes more complex
Solution Approach 1:
The air introduction port is integrated into the existing windshield structure in a way that serves multiple functions: it alleviates negative pressure at high speed, and its configuration allows it to remain dormant or inactive at low speed. This multi-functionality approach enables the same structural element to address comfort issues when needed without unnecessarily complicating the structure during normal operation.
2Productivity
If the windscreen covers a larger area of the air introduction port at lower position, then airflow control is improved, but the air introduction port visibility increases
Solution Approach 1:
The windscreen is designed with vertical movability, allowing it to dynamically adjust its position relative to the air introduction port. At high speed, the windscreen lowers to cover more of the air introduction port, optimizing airflow control. At low speed, the windscreen rises to minimize coverage, maintaining a cleaner external appearance. This dynamic adjustment resolves the contradiction between airflow management efficiency and appearance uniformity.
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 solution effectively manages airflow to reduce negative pressure at high speeds while minimizing unnecessary air introduction at low speeds, improving passenger comfort and maintaining a uniform external appearance.
Implementation Method 1
a negative pressure region is generated in the vicinity of a front of a driver or a passenger, and due to the negative pressure, the passenger sometimes feels that he/she is pulled toward the front direction
Data Source
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AI summary
A scooter type motorcycle comprising a vehicle body cover which covers a front part of a vehicle body and which is formed by a front cowling (112), a front meter panel (116), a rear meter panel (117) and a front panel (118), which are mutually coupled, a windscreen (113) disposed at a position above the front cowling (112) and capable of being vertically moved by a varying mechanism wherein a traveling air taken in at a front part of the vehicle body cover via an air introduction part is exhausted from air-exhaust parts provided on the front meter panel (116) and the front panel (118) and an overlap area between the windscreen (113) and the air introduction part in front elevational view of the vehicle changes in accordance with the vertical position of the windscreen (113).