Engine Combustion-Chamber Cleaning via Sealed Cleaning-Agent Injection
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Solution Overview
Problem
Existing methods for cleaning internal combustion engine combustion chambers are inconvenient, pose health risks due to toxicity, require multiple operators, and lack reproducibility and efficiency, with high costs for protective equipment and disposal.
Innovation Solution
A method involving a predetermined sequence of operations with specific tool usage for injecting cleaning product into engine cylinders, ensuring reproducibility and safety, using a tool that mechanically attaches to the engine for sealed injection and minimizes operator contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If aerosol spray is used for cleaning combustion chambers without specialized equipment, then the operation can be performed as an aftermarket service, but the health risk increases due to toxicity of the product and resulting spray and fumes
Solution Approach 1:
A sealed injection tool serves as an intermediary device between the cleaning product container and the combustion chamber. This tool includes a sealed container for holding the cleaning product, an injection needle for delivering the product, and a sealing mechanism that prevents exposure to toxic fumes and spray, thereby protecting operators while enabling aftermarket service operations
Solution Approach 2:
The injection tool creates a sealed, isolated environment for handling the toxic cleaning product. The sealed container and injection mechanism prevent the release of toxic fumes and spray into the workspace, effectively creating a protected atmosphere that eliminates health risks to operators during the cleaning operation
2Adaptability or versatility
If cleaning operation is performed without standardized procedure, then flexibility is maintained, but the reproducibility of the pressure injection method is poor
Solution Approach 1:
The method establishes preliminary preparatory steps including removing spark plugs and ignition coils, installing the sealed injection tool with specific sealing elements, and preparing the container with cleaning product before the actual injection. These predetermined preparatory actions ensure that the injection operation can be reproduced consistently across different engines and operators while maintaining flexibility in adapting to various engine types
Solution Approach 2:
The cleaning operation is segmented into distinct sequential phases: preparation phase (removing components, installing tool), injection phase (delivering cleaning product through sealed needle), and completion phase (removing tool, reinstalling components). This segmentation allows each phase to be standardized and reproduced reliably while maintaining overall flexibility in the complete cleaning process
3Reliability
If multiple operators are involved in the injection operation, then safety monitoring is improved, but the operation time and complexity increase
Solution Approach 1:
The sealed injection tool is designed to be self-contained and self-regulating. The tool automatically maintains sealing integrity, controls product delivery through its injection mechanism, and prevents exposure without requiring continuous monitoring or assistance from multiple operators. This self-service design enables a single operator to safely and effectively perform the entire cleaning operation, reducing operation time and complexity while maintaining safety through the inherent safety features of the sealed system
4Ease of operation
If cleaning product is injected without precise control, then the operation is simpler, but product waste increases and cleaning efficiency decreases
Solution Approach 1:
The uncontrolled manual spraying mechanism is replaced with a controlled injection system that uses mechanical pressure differential control. The sealed injection tool employs a needle valve or controlled opening mechanism that regulates the flow of cleaning product based on engine vacuum pressure, delivering precise amounts of product directly to the combustion chamber without waste, while maintaining operational simplicity through automatic pressure-based regulation
Data Source
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AI summary
The invention relates to a method for injecting a cleaning product into an engine combustion chamber, each cleaning phase of which (A; B) successively comprises engine preheating (A1; B1), disconnection of the battery and removal of the ignition circuit (A2, A3, A4; B2, B3, B4), then a first injection of the product (A7; B7) for a duration of 5 seconds per cylinder, a first cranking of the starter (A9; B9) for a duration of 5 seconds, a second injection of the product (A12; B12) for a duration of 5 seconds per cylinder, a rest period (A13; B13) of 30 minutes, a second cranking of the starter (A15; B15) for a duration of 10 seconds, reinstallation (A18, A19; B18, B19) of the spark plugs and ignition coils, and a phase of engine running at a steady speed (A21; B21) for a duration of 30 minutes, followed by several engine accelerations (A22; B22), before a final phase (C) of draining and checking.