Parallel Fuel Pump Attachment for Outboard Motor Maintenance
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Solution Overview
Problem
The existing fuel supply devices for engines require an increased number of steps for maintenance due to the perpendicular attachment of the fuel pump to the cylinder head unit, making it difficult to detach the fuel pipe from the delivery pipe.
Innovation Solution
The outboard motor design includes a parallel or substantially parallel attachment of the fuel pump to the cylinder head unit and the fuel pipe to the delivery pipe, allowing for easier detachment and maintenance of the delivery pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fuel pump is attached perpendicular to the cylinder head unit, then the fuel supply device is compact, but the fuel pipe cannot be detached from the delivery pipe while attached to the fuel pump, increasing maintenance steps
Solution Approach 1:
The fuel supply device is segmented into modular components (fuel pump, delivery pipe, fuel pipe) with standardized attachment interfaces. The fuel pipe is designed as a separate detachable component that connects to both the delivery pipe and fuel pump through quick-connect couplings, allowing independent maintenance of each segment without disassembling the entire system.
Solution Approach 2:
The attachment direction of the fuel pump is changed from perpendicular to parallel relative to the delivery pipe axis. This dimensional reorientation allows the fuel pipe to be accessed and detached from the delivery pipe in a linear manner, simplifying maintenance operations and reducing the number of steps required.
2Ease of manufacture
If the fuel pump attachment direction is perpendicular to the delivery pipe, then the design follows conventional layout, but the fuel pipe detachment requires multiple steps and tools
Solution Approach 1:
The fuel pipe is pre-equipped with quick-connect coupling mechanisms at both ends during manufacturing. These pre-installed interfaces are designed to engage and disengage rapidly, eliminating the need for complex assembly/disassembly procedures during maintenance and significantly reducing maintenance time.
Solution Approach 2:
The attachment system transitions from a fixed rigid connection to a dynamic detachable connection. The fuel pipe incorporates quick-release couplings that allow rapid attachment and detachment, enabling the system to adapt between operational and maintenance states efficiently.
Data Source
AI summary
An outboard motor includes a cylinder block, a cylinder head unit, a delivery pipe, a plurality of injectors, a fuel pump, and a fuel pipe. The cylinder block includes a plurality of cylinders. The cylinder head unit is connected to the cylinder block. The delivery pipe is attached to the cylinder head unit. The injectors are attached to the delivery pipe. The fuel pump is attached to the cylinder head unit. The fuel pipe is attached to the delivery pipe and the fuel pump. A first attachment direction of attaching the fuel pump to the cylinder head unit is parallel or substantially parallel to a second attachment direction of attaching the fuel pipe to the delivery pipe.