Fuel Injector Functional Component Separation for Repair
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Solution Overview
Problem
The existing methods for checking and repairing injectors in internal combustion engines are inefficient due to the need to handle heavy and unwieldy high-pressure fuel accumulators, which requires transporting and assembling large components, leading to increased transport costs and labor for maintenance.
Innovation Solution
The method involves separating the functional components (nozzle, throttle plate, and servo valve) from the injector body, using a connecting piece to form an injector module that can be tested and repaired independently, allowing only the small components to be transported for maintenance, thus reducing the need to move the heavy injector body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the injector body with high-pressure fuel reservoir is transported to a central location for repair, then the functional components can be inspected and repaired, but the transport costs and effort increase significantly due to the heavy and unwieldy accumulators
Solution Approach 1:
The injector system is divided into two separate parts: the heavy injector body with the high-pressure fuel reservoir remains at the engine location, while the functional components (nozzle, throttle plate, control valve) are separated and transported independently for inspection and repair. This segmentation allows the repair process to focus only on the essential functional parts without moving the cumbersome accumulator.
Solution Approach 2:
The functional components are extracted from the injector body and removed from the heavy accumulator assembly. By taking out only the necessary functional parts (nozzle, throttle plate, control valve) for transport and repair, the patent eliminates the need to move the entire heavy injector body, significantly reducing transport effort and time.
2Loss of time
If the functional components are separated from the injector body and only the small components are transported, then transport costs and effort are reduced, but the complexity of reassembly increases
Solution Approach 1:
A universal connecting piece is designed that can be attached to the functional components and connected to multiple different injector bodies. This standardized interface simplifies the reassembly process, as the same connecting piece works across different injector units, reducing the complexity of reassembly despite the separation of components.
Solution Approach 2:
The connecting piece acts as an intermediary element between the functional components and the injector body. It provides a standardized interface that simplifies the connection and reassembly process, making the system more manageable despite the separation of heavy and light components.
Data Source
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AI summary
In a method for testing and repairing an injector (1) for injecting fuel into the combustion chamber of an internal combustion engine, wherein the injector (1) has a nozzle (3), a restrictor plate (4), a control valve (5) and a nozzle clamping nut (6) which holds said parts together and by way of which said parts are fastened to an injector body (7) of the injector (1), the functional components of nozzle (3), restrictor plate (4) and control valve (5) are separated from the injector body (7), a connection piece (8) which serves to connect the functional components (3, 4, 5) to a test bench is screwed to the functional components (3, 4, 5) with the aid of the nozzle clamping nut (6) to form an injector module (2), and the injector module (2) is connected to a test bench and is subjected to testing and afterwards possibly repairing.