Marine Engine Cover Partition for Fuel Splash Protection
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Solution Overview
Problem
In diesel engines, high-pressure fuel tubes are prone to leakage due to environmental factors, leading to fuel splashing and exposure of high-temperature components, which complicates the assembly process and increases costs, especially in engines with multiple cylinders.
Innovation Solution
A plate-like partition is integrated into the engine's cover to catch splashing fuel, preventing high-temperature components from exposure and eliminating the need for double-structured fuel tubes and heat insulation materials, thus simplifying the structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If double-structured fuel tubes and heat insulating materials are used to prevent fuel leakage exposure, then safety is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
A partition wall is introduced as an intermediary component between the fuel tube and the exhaust pipe. This partition wall catches and redirects fuel that leaks from the fuel tube, preventing it from reaching the exhaust pipe. The partition wall is integrated into the valve cover structure, providing a simple and effective solution that avoids the complexity of double-structured fuel tubes or heat insulating materials.
2Reliability
If double-structured fuel tubes are used for each cylinder, then fuel leakage prevention is improved, but manufacturing cost and assembly labor increase
Solution Approach 1:
The engine's valve cover structure is segmented into multiple regions by partition walls. Each partition wall is positioned to protect specific cylinders or groups of cylinders from fuel leakage. This segmentation approach allows the protective function to be distributed across multiple simple structural elements rather than requiring complex double-structured fuel tubes for each cylinder, thereby simplifying manufacturing and assembly.
3Reliability
If heat insulating materials are applied to exhaust pipes, then protection from fuel exposure is improved, but device complexity and assembly process complexity increase
Solution Approach 1:
The partition wall structure is merged with the valve cover as an integrated component. This combination eliminates the need for separate heat insulating materials on the exhaust pipe while still providing protection against fuel exposure. The partition wall serves both as a structural element of the valve cover and as a protective barrier, reducing the total number of parts and simplifying the assembly process.
Data Source
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AI summary
A marine engine includes an exhaust manifold, a valve cover (41), a top cover (10), and a fuel supply pipe (33). The exhaust manifold collects exhaust gases discharged from a plurality of cylinders. The valve cover (41) is a cover that covers all of a plurality of valves for air intake or air discharge to or from the cylinders. The top cover (10) is a cover that covers the valve cover (41). The fuel supply pipe (33) is arranged in a space between the valve cover (41) and the top cover (10), and allows a fuel to flow therethrough. The top cover (10) is provided with a partition (11) that is arranged so as to separate the side where the exhaust gas flows immediately after being discharged from the exhaust manifold from the side where the fuel supply pipe (33) is arranged.