Canister With Nested Adsorption Chambers Reducing Welding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production of canisters with multiple adsorption chambers of varying cross-sectional areas is hindered by the need for complex molding and increased welding, leading to higher production costs due to increased welding portions.
Innovation Solution
A canister design featuring an outer case and an inner case with distinct adsorption chambers of different cross-sectional areas, where the inner case is inserted into the outer case, reducing the need for welding and simplifying the structure, thereby reducing production costs and ventilation resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple adsorption chambers with different cross-sectional areas are designed in a single canister case, then ventilation resistance is reduced and adsorption performance is improved, but the molding process becomes complex and welding portions increase leading to higher production costs
Solution Approach 1:
The canister is divided into an outer case and an inner case, where the inner case contains multiple adsorption chambers with different cross-sectional areas. This segmentation allows each case to be molded separately with simpler geometry, avoiding the complexity of molding a single case with varying cross-sections, while still achieving the desired ventilation resistance reduction through the multi-chamber design.
Solution Approach 2:
The inner case is inserted into the outer case, with the inner case containing the adsorption chambers. This nested structure allows the complex multi-chamber design to be achieved without requiring complex molding of a single case. The inner case can be molded separately with its specific chamber geometry, then assembled into the outer case, reducing overall molding complexity and welding requirements.
2Ease of manufacture
If the canister case is divided into multiple parts to accommodate complex adsorption chamber layouts, then molding becomes feasible, but welding portions increase and production time increases
Solution Approach 1:
The canister is segmented into an outer case and an inner case with adsorption chambers. This segmentation makes the molding process feasible for both parts individually, as each has a relatively simple geometry compared to a single complex case. The segmentation reduces the need for extensive welding while maintaining manufacturing feasibility.
Solution Approach 2:
The inner case is nested within the outer case, creating a hierarchical structure that reduces the number of welding joints required. Instead of welding multiple separate chambers to a single complex case, the nested design allows the inner case to be inserted into the outer case, minimizing welding portions and reducing production time.
3Reliability
If adsorption chambers with varying cross-sectional areas are implemented, then adsorption capacity and ventilation are improved, but the structural complexity and welding requirements increase
Solution Approach 1:
The adsorption chambers with varying cross-sectional areas are contained within the inner case, which is segmented from the outer case. This segmentation allows the complex multi-chamber structure to be realized within the inner case while keeping the outer case structurally simple. The result is improved adsorption capacity through varied cross-sections without proportionally increasing overall structural complexity.
Solution Approach 2:
The inner case containing the adsorption chambers is nested within the outer case. This nested structure isolates the structural complexity of the multi-chamber design to the inner case, while the outer case maintains a simple protective structure. This reduces the overall structural complexity compared to integrating all chambers into a single complex case.
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 design reduces production costs and ventilation resistance while allowing for a more compact and flexible canister configuration, enhancing the degree of freedom in external size and simplifying the inner case structure.
Implementation Method 1
The canister adsorbs the evaporated fuel to an adsorbent
Implementation Method 2
desorbs fuel from the adsorbent with taken-in air for purging
Data Source
AI summary
Provided is a canister that makes it possible to reduce production costs. One aspect of the present disclosure is a canister. The canister includes an outer case including a charge port that takes in an evaporated fuel, a purge port that discharges the evaporated fuel, and an atmosphere port open to the atmosphere, an inner case arranged inside the outer case, the inner case having an inner space to which the atmosphere port is connected, a first adsorption chamber arranged in the inner space of the inner case, and a second adsorption chamber arranged between the first adsorption chamber and the atmosphere port in a flow path of the evaporated fuel in the inner space of the inner case. A cross-sectional area perpendicular to a gas flow direction in the second adsorption chamber and a cross-sectional area perpendicular to a gas flow direction in the first adsorption chamber are different.