Resonator Chamber Integrated Into Head Box for Noise Reduction
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Solution Overview
Problem
Saddle-ride type vehicles face challenges in reducing the size of the front portion while maintaining effective noise silencing due to the need for a large resonator volume and space constraints for the resonator placement.
Innovation Solution
The resonator chamber is integrated into the head box, forming an inner and outer wall of the head pipe, allowing for compact placement without external protrusions, and is disposed on both sides to enhance volume and rigidity, with a communication hole for smooth airflow and reduced intake resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the resonator is disposed outside the head box, then the silencing effect can be obtained, but the size of the front portion of the vehicle body increases
Solution Approach 1:
The resonator is merged with the head box to form an integrated structure. The resonator forms an inner wall of the head box and an outer wall of the head pipe, combining two previously separate components into one unified structure that reduces overall size while maintaining silencing functionality
Solution Approach 2:
The resonator is nested within the head box structure. The resonator chamber is formed inside the head box in such a way as to continue to the intake passage, placing the resonator within the existing structural envelope rather than adding external volume
2Object-affected harmful factors
If the resonator volume is increased to enhance silencing effect, then the noise reduction performance improves, but the front portion size increases
Solution Approach 1:
The resonator utilizes the vertical space within the head box by positioning itself along the handlebar steering axis. The upper-lower length of the resonator is shorter than the head pipe, allowing the resonator chamber to develop volume in the vertical dimension rather than extending the front portion horizontally
Solution Approach 2:
The resonator forms both the inner wall of the head box and the outer wall of the head pipe, effectively using the space between these walls to create the resonator chamber volume without adding external dimensions
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 reduces the vehicle's front portion size while enhancing the silencing effect and improving airflow efficiency, allowing for effective noise reduction and engine performance.
Implementation Method 1
a resonator that forms a resonator chamber configured to reduce an intake noise
Data Source
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AI summary
A resonator structure of a saddle-ride type vehicle includes: a head box 20 that includes a head pipe 21 forming a handlebar steering axis C1 and forms an intake passage 20s through which air is taken from a front of the vehicle into an inside of the vehicle when the vehicle is travelling; an air cleaner box 40 that is connected to the head box 20 and allows the air to be taken into a power unit 10 of the vehicle; and a resonator 23 that forms a resonator chamber 23s configured to reduce an intake noise, wherein the resonator chamber 23s is formed inside the head box 20 in such a way as to continue to the intake passage 20s. The resonator chamber is for reducing intake noise, and the resonator structure achieves size reduction of a front portion of a vehicle body while enhancing a silencing effect of the resonator.