Modular Motorcycle Intake Duct for Variable Sectional Area
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Solution Overview
Problem
Conventional intake duct structures for motorcycles have a fixed sectional area, making it impractical to adapt to different vehicle types, such as converting a mass-produced vehicle for public roads to a racing vehicle without modifying the frame.
Innovation Solution
A modular intake duct system comprising a separate front and rear intake duct that surrounds the steering head pipe, allowing for adjustment of the sectional area without altering the body frame, with fastening components and an oval-shaped support post for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the intake duct is formed as an integral part of the body frame, then the structural strength and rigidity are improved, but the adaptability to different vehicle types deteriorates
Solution Approach 1:
The intake duct is separated from the body frame as an independent component. This segmentation allows the intake duct to be designed and manufactured separately, enabling easy replacement and adaptation to different vehicle types without modifying the body frame structure, while still maintaining structural integrity through proper mounting arrangements.
2Ease of manufacture
If the intake duct sectional area is fixed, then the manufacturing simplicity is improved, but the adaptability to different steering angles and fork pitches deteriorates
Solution Approach 1:
The intake duct is designed with adjustable parameters including variable sectional area, different shapes, and configurable mounting positions. This allows the same basic duct structure to be adapted to different steering angles and fork pitches by changing geometric parameters rather than redesigning the entire system, maintaining manufacturing simplicity while achieving versatility.
3Adaptability or versatility
If the intake duct is made as a separate component, then the adaptability to different vehicle configurations is improved, but the device complexity increases
Solution Approach 1:
The separate intake duct component is designed with universal mounting features and standardized connection interfaces that can accommodate different vehicle configurations. This universality allows a single duct design to serve multiple functions across different vehicle types, reducing overall system complexity despite the component being separate from the frame.
Data Source
AI summary
An engine is mounted on a body frame extending from a steering head pipe toward a vehicle rear side slightly downward and an air cleaner is disposed above the engine. An intake duct device includes an intake duct which leads traveling air taken from a front surface of a cowling to the air cleaner so as to make the traveling air pass along both side surfaces of the steering head pipe. The intake duct is made of a separate component from the body frame, is two-divided into a front intake duct and a rear intake duct so as to surround the steering head pipe from front and rear sides, and is fixed to the body frame by fastening.