Engine Casing Recess for Sealing and Fastening
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Solution Overview
Problem
Automotive manufacturers face challenges in packaging larger engines in smaller vehicle engine bays due to the difficulty in reducing the size of engine casings while maintaining structural and sealing requirements, particularly in designing casing components that can be used across various vehicle platforms.
Innovation Solution
The design incorporates a casing portion with a recessed sealing face that includes a sealant retention channel and openings for fasteners, allowing for reduced thickness and internal dimensions while maintaining sealing and structural integrity, utilizing as-cast or as-molded features to minimize manufacturing processes and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the engine casing size is reduced to improve packaging flexibility, then the packaging requirements are reduced, but the structural integrity and sealing capability of the casing joints deteriorate
Solution Approach 1:
The invention moves the sealing function from the external joint interface to an internal recess within the sealing face. By creating a recess that receives sealant and positioning fastener openings to extend into this recess, the design utilizes the third dimension (depth) of the sealing face to achieve sealing without increasing the external dimensions of the casing, thus reducing overall casing size while maintaining sealing capability
Solution Approach 2:
The fastener openings are nested within the recess structure, with the openings extending into the recess wall. This nesting arrangement allows the fastener holes to be positioned within the existing recess volume rather than requiring additional space in the sealing face, enabling reduced casing thickness while maintaining both fastening and sealing functions
2Volume of moving object
If the engine casing size is reduced to improve packaging flexibility, then the packaging requirements are reduced, but the structural integrity of the casing components deteriorates
Solution Approach 1:
By utilizing the depth dimension of the sealing face through recesses, the design achieves structural reinforcement without increasing the external footprint. The recesses and bearing portions create internal structural features that maintain strength while allowing reduced overall casing dimensions for better packaging
Solution Approach 2:
The invention concentrates structural reinforcement locally at the sealing face through recesses and bearing portions rather than uniformly thickening the entire casing. This localized quality enhancement provides necessary structural integrity at critical joints while keeping the rest of the casing compact for improved packaging
3Reliability
If traditional sealing and fastening methods are used, then reliable sealing and structural support are achieved, but the casing thickness and overall size increase
Solution Approach 1:
The invention utilizes the depth dimension of the sealing face by creating recesses that extend into the casing material. This allows sealant to be contained within the recess and fastener openings to extend into the recess wall, achieving reliable sealing and fastening within a compact thickness without requiring additional external space
Solution Approach 2:
The design merges the sealing function and fastening function into a single integrated recess structure. The recess simultaneously provides sealant retention and accommodates fastener openings that extend into its wall, combining multiple functions that traditionally required separate features and increased thickness
Data Source
AI summary
A machinery casing portion for an engine, the machinery casing portion having a first sealing face configured to engage a second sealing face of a second machinery casing portion so as to form a sealed joint therebetween in an assembled configuration, the machinery casing portion comprising: a recess configured to receive a sealant, the recess being provided adjacent to the first sealing face; and at least one opening configured to receive a fastener, wherein the opening at least partially extends into a wall of the recess.