Adjustable Engine Repair Template for Precise Mounting Hole Alignment
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Solution Overview
Problem
Existing methods for repairing exhaust manifold bolt holes are inefficient and lack precision, requiring multiple templates and manual measurements, which can lead to inaccurate alignment and increased costs due to the need for engine-specific tools.
Innovation Solution
A single repair apparatus with adjustable guide carriages and alignment pieces that can be precisely aligned with engine mounting holes, allowing for the use of a universal template to drill out and re-tap broken or stuck bolts, facilitating repairs across various engine configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a customized template is used for each engine/exhaust manifold configuration, then repair precision is improved, but device complexity and storage requirements increase
Solution Approach 1:
The patent applies universality by designing a single template that can accommodate multiple engine and exhaust manifold configurations through adjustable guide carriages. Instead of requiring separate customized templates for each configuration, the universal template can be adapted to different bolt hole patterns by repositioning the guide carriages along the template surface, thereby reducing device complexity and storage requirements while maintaining repair precision.
Solution Approach 2:
The patent applies dynamics by incorporating adjustable guide carriages that can be moved to different positions on the template. This dynamic adjustment capability allows the same template to be configured for various engine types and exhaust manifold arrangements, eliminating the need for multiple static templates and reducing the overall complexity of the repair tooling system.
2Adaptability or versatility
If manual measurement and adjustment of template guides is used, then adaptability to different engines is improved, but measurement precision and repair accuracy deteriorate
Solution Approach 1:
The patent applies this principle by providing pre-manufactured guide carriages with built-in alignment features that eliminate the need for repeated manual measurements. The guide carriages are designed with precise positioning mechanisms and alignment pins that ensure accurate bolt hole alignment without requiring the mechanic to perform manual measurements, thereby maintaining both adaptability and precision.
Solution Approach 2:
The guide carriages are designed to self-align with the engine block and exhaust manifold through built-in alignment features such as tapered pins and reference surfaces. This self-alignment capability eliminates human measurement error and ensures consistent precision across different engine configurations without requiring skilled measurement techniques.
3Device complexity
If a fixed repair hole position on the template is used, then device simplicity is improved, but versatility to reach all bolt holes deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the template into a base structure and multiple independent guide carriages. The guide carriages can be positioned at different locations on the template to access various bolt holes across the engine and exhaust manifold. This segmentation allows a single template to provide versatile access to all bolt holes without requiring multiple fixed-hole templates, balancing structural simplicity with adaptability.
4Adaptability or versatility
If linkages are added to expand template reach, then versatility is improved, but tolerance error accumulates
Solution Approach 1:
The patent applies this principle by removing the problematic linkage mechanism from the template design. Instead of using linkages to expand reach, the design extracts the positioning function into separate, independently adjustable guide carriages that slide along the template. This eliminates the cumulative tolerance errors associated with linkage connections while maintaining the ability to reach all bolt holes through direct positioning of the guide carriages.
Data Source
AI summary
An improved apparatus for repairing broken mounting holes in engines, such as broken exhaust manifold mounting holes, is disclosed. The adjustable template can be readily mounted to different components on different types of engines and provides adjustable carriages that allow for the precise alignment of bushing and various repair tools to facilitate repair of broken mounting holes.