Cylinder Liner 3D Scanning Through Fuel Injector Access
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Solution Overview
Problem
Existing cylinder liner inspection systems for four-stroke engines require substantial dismantling, are time-consuming, and provide insufficiently accurate and efficient data, especially when operating conditions necessitate rapid inspections without full engine shutdown.
Innovation Solution
A cylinder liner inspection system utilizing a 3D scanner with an elongated member inserted through a fuel injection port, combined with reciprocating and rotational movements, allowing real-time scanning of the interior surface without disassembling the engine, using high-precision sensors for accurate data capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complete inspection of cylinder liners is performed by dismantling all components, then inspection thoroughness is improved, but downtime and cost increase significantly
Solution Approach 1:
The inspection system extracts only the necessary components (spark plug and piston) to access the cylinder liner interior surface, rather than requiring complete dismantling of all engine components. This allows thorough inspection while minimizing downtime and operational disruption.
Solution Approach 2:
A rod-shaped camera device serves as an intermediary tool that can be inserted through the spark plug opening to capture images of the cylinder liner interior surface. This mediator enables inspection without requiring direct access to the entire cylinder interior, reducing the need for extensive dismantling.
2Measurement precision
If traditional inspection methods are used requiring engine shutdown, then inspection accuracy is improved, but productivity decreases
Solution Approach 1:
The inspection system is designed to be dynamically adaptable - it can operate with the engine shutdown for high-precision inspections, or with the engine running for rapid assessments. The camera device can capture images during piston movement, allowing inspection without complete engine shutdown and maintaining productivity.
Solution Approach 2:
The inspection can be performed periodically during scheduled maintenance when the engine is naturally shut down, or can be conducted during operation using periodic piston movements to bring different areas of the cylinder liner into view. This flexible periodic approach maintains both accuracy and productivity.
3Measurement precision
If high-resolution scanning is performed throughout the entire cylinder liner, then data quality is improved, but inspection time increases
Solution Approach 1:
The inspection system applies different scanning resolutions to different areas of the cylinder liner based on their importance and condition. High-resolution scanning is focused on areas showing signs of wear, deposits, or anomalies, while other areas receive standard-resolution scanning. This local quality approach maintains data quality for critical areas while reducing overall inspection time.
Solution Approach 2:
Instead of uniformly scanning the entire cylinder liner at high resolution, the system performs partial high-resolution scanning only on specific segments or areas of concern. This partial action approach provides sufficient data quality for decision-making without the time cost of complete high-resolution scanning of the entire surface.
4Ease of operation
If complex dismantling procedures are required for inspection, then access to interior surfaces is improved, but device complexity and operational difficulty increase
Solution Approach 1:
The inspection system uses universal access points (spark plug openings and piston access) that are common to all internal combustion engines. The same basic inspection procedure can be applied across different engine types and configurations, reducing operational complexity and training requirements while maintaining access to the cylinder liner interior surface.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables fast, reliable, and precise inspection of cylinder liners in operation, providing high-resolution data without engine shutdown, adaptable to various cylinder configurations and reducing downtime.
Implementation Method 1
3D scanner means (18) arranged at the inspection end (15a) of said elongated member (15) for scanning of at least a part of the surface of the interior wall (19) of the cylinder (16)
Data Source
Figure 2
AI summary
An inspection system (14) is configured for inspecting an interior wall of a cylinder liner (13) of a cylinder (1) of a four-stroke engine. The inspection system (14) comprises an inspection tool. The inspection tool has an elongated member (15) arranged reciprocatingly along a lengthwise axis of the cylinder (1) between a cylinder head cover (10) of the cylinder (1), reciprocating means configured to reciprocate the elongated member (15), and rotation means configured to rotate the elongated member (15) about is longitudinal axis. The elongated member (15) is configured for being arranged with a free end (17) outside a cylinder head cover (10) of a cylinder (1) of the four-stroke engine, and an opposite inspection end (15a) inside said cylinder (1), and the inspection end (15a) is provided with a 3D scanner means (18) to retrieve a scan of the surface of the interior wall (19) of the cylinder (1).