Motorcycle Air Intake Device with Segmented Ports
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Solution Overview
Problem
Conventional motorcycle air intake devices have limited air intake efficiency and engine performance due to restricted open areas, which cannot meet modern demands and compromise the rigidity of the motorcycle frame when trying to increase intake efficiency.
Innovation Solution
The design includes an air cleaner with a main intake port positioned between main frame pieces, an intake air introducing port rearwardly positioned within the main frame, an intake air discharge port opened rearwardly, and a sub intake port to increase air intake efficiency and reduce noise, using a connecting ring made of elastic material for secure air tightness and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the open area of the intake port of the air cleaner is increased to improve air intake efficiency, then the air intake efficiency is improved, but the rigidity of the motorcycle frame structure is adversely affected
Solution Approach 1:
The air intake system is divided into multiple independent intake ports (main intake port and sub intake port) located at different positions. This segmentation allows each port to contribute to air intake without requiring any single port to have an excessively large opening that would compromise frame rigidity.
Solution Approach 2:
The intake ports are positioned at different spatial locations and orientations (main intake port in the front, sub intake port on the side). This multi-dimensional arrangement increases the total effective intake area without requiring larger openings in any single location, thus maintaining frame structural integrity.
2Productivity
If the open area of the intake port of the air cleaner is increased to improve air intake efficiency, then the air intake efficiency is improved, but the air intake sound is not reduced
Solution Approach 1:
The air intake flow is divided into multiple streams through separate intake ports positioned at different locations. This segmentation of the air intake path helps to reduce turbulent noise by allowing air to enter through multiple smaller openings rather than one large opening, while still achieving the required total air intake volume.
Solution Approach 2:
The introducing passage acts as an intermediary structure that guides air from the intake ports through a controlled path to the air cleaner. This intermediary passage design helps to manage air flow smoothly and reduce noise generation during the intake process.
3Productivity
If multiple intake ports and passages are added to increase air intake efficiency, then the air intake efficiency is improved, but the device complexity increases
Solution Approach 1:
The motorcycle frame structure serves multiple functions: it provides structural support and simultaneously houses the introducing passage for air intake. This multi-functionality allows the air intake system to be integrated into the existing frame without adding separate complex structures, thereby reducing overall device complexity despite having multiple intake ports.
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 enhances air intake efficiency, improves engine performance, reduces intake noise, and maintains the structural integrity of the motorcycle frame while keeping manufacturing costs low by utilizing conventional parts.
Implementation Method 1
a connecting ring made of elastic material for secure air tightness
Data Source
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AI summary
In an air intake device for motorcycle, an air cleaner (36) having an front end formed with a main intake port (41) is disposed between a pair of left and right main frame pieces (1a, 1b) forming a main frame (1). An introducing passage (43) is formed within the main frame (1) for capturing an incoming wind. An intake air introducing port (40) of the introducing passage (43) is provided at a location rearwardly of the main intake port (41) in the main frame piece (1a, 1b). An intake air discharge port (39) is defined in an intermediate portion of a front portion of the main frame (1) with respect to a motorcycle widthwise direction so as to open rearwardly and to be fluid connected with the main intake port (41). A sub intake port (42) is provided in communication with the main intake port (41) so as to introduce an intake air (A) into the main intake port (41).