Air Cleaner Case Half Body for Motorcycle Engine Intake
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Solution Overview
Problem
The existing air cleaner structure in saddle-ride type vehicles complicates the arrangement and shape of the purified air passage to the engine body side, making it difficult to insert and remove the cleaner element from the vehicle's lateral side, and results in increased intake noise.
Innovation Solution
The air cleaner structure features a cleaner case with a cleaner element insertion/removal port, a purified air outlet, and an outside air suction port on the first case half body, allowing for easier element access and improved passage arrangement, along with an enlarged rear portion forming an L-shaped joint and a recessed outside air suction port to reduce noise and increase the non-purifying chamber volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the purified air outlet is provided in the other case half body to enlarge the passage leading purified air from the air cleaner to the engine body side, then the passage capacity is improved, but the cleaner case structure becomes complicated
Solution Approach 1:
The patent combines multiple functions (purified air outlet, outside air suction port, and cleaner element insertion/removal port) into a single case half body (the first case half body). This merging approach allows the passage capacity to be maintained while avoiding the structural complication that would arise from distributing these functions across both case half bodies.
2Device complexity
If the cleaner element insertion/removal port is opened unilaterally obliquely forward in the vehicle width direction, then the structure is simplified, but the cleaner element cannot be easily inserted and removed from the vehicle lateral side
Solution Approach 1:
Instead of opening the cleaner element insertion/removal port in the conventional oblique forward direction, the patent inverts the opening direction to face outward (laterally). This inversion makes the cleaner element accessible from the vehicle lateral side, significantly improving ease of operation and maintenance while keeping the structure relatively simple.
3Device complexity
If the outside air suction port is opened in the conventional position, then the structure is simple, but the intake noise increases
Solution Approach 1:
The patent applies local quality by creating a recessed portion at the specific location of the outside air suction port. This localized structural modification (the recess) serves to reduce intake noise without requiring complex changes to the overall cleaner case structure, thus balancing structural simplicity with noise reduction.
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 engine performance by improving the degree of freedom in air passage arrangement, simplifies cleaner element insertion and removal, reduces intake noise, and extends the service life of the cleaner element while ensuring air suction performance and sealability.
Implementation Method 1
an air cleaner having a cleaner element stored in a cleaner case
Data Source
AI summary
In a saddle-ride type vehicle in which a cleaner case of an air cleaner is configured with first and second case half bodies coupled to each other and arranged in a vehicle width direction, and is arranged in a space surrounded by a vehicle body frame, a first case half body is provided with: a cleaner element insertion/removal port opened outward so as to permit insertion and removal of a cleaner element therethrough; a purified air outlet connected with a connecting tube for guiding purified air to an engine body side; and an outside air suction port for introducing air from an outside into the cleaner case.