Engine Block Top Deck Repair Using Segmented Recessed Inserts
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Solution Overview
Problem
Existing methods for repairing engine blocks, such as those described in U.S. Pat. No. 5,222,295, are inadequate for addressing cracks that radiate from cylinder bores and occur along edges of surrounding fluid passages, and there is a need for economically feasible and effective repair and remanufacture techniques.
Innovation Solution
A method involving the removal of material from the top deck of an engine block to create recessed areas around cylinder bores and fluid passages, followed by the positioning of a ring-shaped insert with radially extending arcuate segments to reinforce and repair the damaged areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If material is removed only from the cylinder bore area to repair cracks, then cracks within the cylinder bore are repaired, but cracks radiating from the cylinder bore across the top deck and wear along fluid passage edges are not addressed
Solution Approach 1:
The patent applies local quality by creating a recessed area with extended material removal that provides different zones for different repair needs: the central area addresses cylinder bore cracks while the extended peripheral areas address radiating cracks and fluid passage wear, allowing each zone to be optimized for its specific repair requirement
Solution Approach 2:
The repair area is segmented into multiple functional zones within the recessed area: a central zone for cylinder bore crack repair and extended peripheral zones for addressing radiating cracks and fluid passage wear, enabling targeted repair of different damage types in a single operation
2Adaptability or versatility
If a comprehensive recessed area is created to address all crack locations and fluid passage wear, then repair coverage is improved, but manufacturing complexity and material removal increase
Solution Approach 1:
The patent merges multiple repair functions into a single integrated recessed area structure, combining cylinder bore crack repair, radiating crack repair, and fluid passage wear repair into one unified geometric feature, simplifying the overall repair process while maintaining comprehensive coverage
Data Source
AI summary
A method for manufacturing an engine block, such as for an internal combustion engine, includes a step of removing material from a top deck of the engine block surrounding a cylinder bore to create a first removal area. Material is also removed from the top deck of the engine block surrounding at least one fluid passage to create a second removal area. An insert is positioned within a recessed area defined by the first removal area and the second removal area.