Vehicle Canister Dust Filter Drainage Design
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Solution Overview
Problem
Existing dust filters for vehicle canisters face issues with water infiltration during rain or washing, which can impair the filtration member's function by allowing water to accumulate and potentially damage the filtration system.
Innovation Solution
A dust filter design featuring a cover with a drainage channel and baffle plates that prevents water from entering through the drainage port, ensuring adequate drainage performance while keeping the filtration member dry, and includes a two-member structure for the cover that can be easily attached and detached for improved design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a drainage port is provided at the bottom of the case to drain water, then drainage performance is improved, but water infiltration into the case worsens
Solution Approach 1:
A cover member is introduced as an intermediary component between the drainage port and the case interior. The cover includes a drainage channel that receives water from the drainage port and directs it to an outlet, preventing water from directly entering the case while maintaining drainage functionality
Solution Approach 2:
The drainage path is extended into a three-dimensional tortuous channel within the cover member rather than a direct linear path. This multi-dimensional routing allows water to flow from the drainage port through the cover's internal channel to the outlet without accessing the case interior
2Ease of manufacture
If the cover structure is made integrated with the case, then manufacturing is simplified, but design flexibility and water protection worsen
Solution Approach 1:
The cover structure is divided into a separate cover member that can be independently designed and manufactured. This segmentation allows the cover to be optimized for water protection while the case is optimized for its primary function, and the two can be assembled through engagement features
3Ease of manufacture
If the drainage channel is made linear and direct, then manufacturing is easier, but water protection capability worsens
Solution Approach 1:
The drainage channel is designed as a tortuous, multi-dimensional path within the cover member rather than a simple linear channel. This complex routing prevents water from taking a direct path into the case while still allowing efficient drainage through the outlet
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 suppresses water infiltration into the dust filter, maintaining the filtration member's performance and preventing damage from water accumulation, even under conditions like rain or pressure washing.
Implementation Method 1
The outlet is located lower than the drainage port relative to a direction of gravity. Accordingly, the infiltration of water via the drainage port can be suppressed, while also ensuring adequate drainage performance of the dust filter
Data Source
AI summary
A dust filter is configured to filter air drawn into a vehicle canister. The dust filter includes a first portion including a first engaging portion and a second portion including a second engaging portion. The second portion is attached to the first portion by engagement of the second engaging portion with the first engaging portion. The first portion includes a filtration member and a case. The case includes an inner chamber within which the filtration member is disposed. The case includes a drainage port configured to drain liquid that has infiltrated the inner chamber. The second portion is attached to the first portion to form a cover that covers the drainage port together with the first portion. The cover has an outlet that opens to the outside at a position lower than the drainage port.