Multi-Circuit Protection Valve Stack Layout for Flexible APU Assembly
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Solution Overview
Problem
Existing air processing units for commercial vehicles face challenges in flexibility and design inflexibility, leading to higher weight and manufacturing costs due to modular systems with mixed metal and plastic casings, and inflexible assembly directions.
Innovation Solution
A multi-circuit protection valve unit designed as a stack or sandwich structure with metal interface and cover parts, allowing for flexible design and assembly, including a separate ECU attachment perpendicular to the main assembly direction, and incorporating plastic separators for reduced weight without compromising stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a modular air processing unit with separate air dryer part and priority device each comprising an own casing is used, then flexibility is improved, but total weight and manufacturing costs increase
Solution Approach 1:
The patent combines the air dryer part and priority device into a single integrated housing structure, eliminating the need for separate casings. This merging reduces the total weight while maintaining the functional flexibility of modular components within the unified housing, directly resolving the contradiction between flexibility and weight.
2Adaptability or versatility
If a modular air processing unit with separate air dryer part and priority device each comprising an own casing is used, then flexibility is improved, but manufacturing costs increase
Solution Approach 1:
By integrating multiple functional components into a single housing, the patent reduces the number of separate manufacturing processes, assembly steps, and sealing interfaces required. This merging simplifies production and reduces manufacturing costs while preserving the adaptive functionality of the system.
3Weight of moving object
If at least one casing part is made of plastic with valves and functional parts in a second plastic casing between metal casings, then weight is reduced, but design flexibility is limited by common assembling direction requirement
Solution Approach 1:
The patent segments the housing into multiple parts (first housing part, second housing part, third housing part) that can be assembled in different directions and configurations. This segmentation allows weight reduction through plastic materials while maintaining design flexibility by enabling various assembly orientations, directly resolving the contradiction between weight reduction and design flexibility.
4Ease of manufacture
If all parts are assembled in a common assembling direction, then manufacturing is facilitated, but design becomes inflexible
Solution Approach 1:
The patent introduces dynamic assembly capabilities by allowing different housing parts to be assembled in different directions (first assembling direction for inlet/outlet, second assembling direction perpendicular to first for ECU). This dynamic assembly approach maintains manufacturing efficiency while significantly improving design flexibility, resolving the contradiction between ease of manufacture and design flexibility.
Data Source
AI summary
A multi-circuit protection valve unit for an air processing unit of a commercial vehicle is provided. The multi-circuit protection valve unit includes a multi-circuit protection valve and an ECU assembled thereto. The multi-circuit protection valve includesan MCPV housing including an interface body part and a cover part, the interface body part and the cover part defining an interior space between them.Housing screws connect the interface body part and the cover part together, andfunctional parts are provided in the interior space. Asealing means and a separator means are provided between the interface body part and the cover part,thereby defining pneumatic passageways in said interior space.The interface body part includes pneumatic ports for connecting said multi-circuit protection valve unit to consumer circuits.The ECU is attached to said MCPV housing in an ECU mounting direction that is perpendicular to said an assembling direction.