Engine Block Top Deck Repair Using Overlapping Recessed Seals
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Solution Overview
Problem
Existing methods for repairing engine blocks, such as U.S. Pat. No. 5,222,295, are inadequate in addressing cracks that radiate from cylinder bores across the top deck and wear along edges of fluid passages, and do not provide effective sealing for shallow inserts, necessitating a more comprehensive and economically feasible solution for remanufacturing engine blocks.
Innovation Solution
The method involves removing material from the top deck of an engine block to create recessed areas around openings like cylinder bores and fluid passages, positioning seals with matching diameters within these areas, and inserting cylindrical or ring-shaped components to provide structural support and sealing, allowing for overlapping configurations to enhance stability and sealing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If material is removed from the top deck to create recessed areas for inserts and seals, then sealing capability and structural integrity are improved, but manufacturing complexity and time increase
Solution Approach 1:
The method performs material removal and creates recessed areas before final assembly of inserts and seals. This preliminary preparation ensures proper fit and sealing surfaces are established in advance, improving sealing capability while organizing the manufacturing process to reduce overall complexity
Solution Approach 2:
The engine block repair process is divided into distinct segments: material removal, recessed area creation, seal placement, and insert positioning. This segmentation allows each operation to be optimized independently, improving sealing capability while making the complex manufacturing process more manageable and systematic
2Reliability
If deep recessed areas are created to accommodate seals and inserts, then sealing efficacy is improved, but material removal and manufacturing time increase
Solution Approach 1:
Recessed areas are created only in specific locations where sealing is required, rather than uniformly across the entire top deck. The depth and extent of material removal are localized to match the specific sealing needs at each opening, improving sealing efficacy while minimizing unnecessary material removal and manufacturing time
Solution Approach 2:
The method removes slightly more material than the absolute minimum required to create adequately deep recessed areas that ensure proper seal seating. This partial excess action guarantees sealing efficacy by ensuring seals are fully seated and compressed, while avoiding the time waste of creating excessively deep recesses that would provide no additional sealing benefit
Data Source
AI summary
A method for manufacturing an engine block includes removing material from the top deck of the engine block surrounding a first opening to create a first recessed area, placing a first seal within the first recessed area, positioning a first insert within the first recessed area and against the first seal. The method may also include removing material from the top deck of the engine block surrounding a second opening to create a second recessed area that at least partially overlaps the first recessed area, placing a second seal in the second recessed area and positioning a second insert within the second recessed area and against the second seal.