High-Pressure Fuel Pump Layout Flexibility via Segmented Attachment Plates
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Solution Overview
Problem
Conventional high-pressure fuel pumps have a fixed layout for components like suction joints, discharge joints, and electromagnetic suction valve mechanisms, limiting their positional flexibility and increasing production costs due to the need for multiple pump body models to accommodate different engine layouts.
Innovation Solution
The high-pressure fuel pump design features a pump body with a cylindrical or polygonal side surface portion where the suction joint, discharge joint, and electromagnetic suction valve mechanism are fixed internally, allowing for flexible layout arrangements without altering the pump body shape, and a method involving forging and machining to produce the pump body with reduced production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the boss portion is provided in the housing body to fix components, then the components are securely positioned, but the layout flexibility is reduced and production costs increase
Solution Approach 1:
The pump body is divided into a standard main body and separate attachment plates. The attachment plates are positioned at different locations on the pump body surface, allowing components to be attached at various positions without modifying the main pump body structure. This segmentation enables layout flexibility while maintaining stable component positioning through dedicated attachment surfaces.
Solution Approach 2:
Instead of positioning components radially around the plunger axis (conventional approach), the invention uses attachment plates distributed on the outer surface of the pump body in different spatial dimensions. This allows suction joints, discharge joints, and electromagnetic suction valve mechanisms to be positioned at various locations including side surfaces, enabling adaptable layouts for different engine configurations.
2Adaptability or versatility
If multiple pump body models are created to accommodate different engine layouts, then layout adaptability is improved, but production costs and management complexity increase
Solution Approach 1:
A single standardized pump body design serves multiple engine layout requirements through the use of interchangeable attachment plates. The attachment plates are distributed at multiple positions on the pump body surface and can be selectively used depending on the required component layout. This universal pump body design eliminates the need to create multiple pump body models for different applications, reducing production costs and simplifying manufacturing management.
3Ease of operation
If the component positions are fixed on the pump body, then assembly is simplified, but the degree of freedom for layout is reduced
Solution Approach 1:
The attachment system is segmented into the pump body and separate attachment plates. The attachment plates provide predetermined attachment positions with proper spacing and mounting holes, maintaining assembly simplicity. Meanwhile, different combinations of attachment plates can be used to achieve various layouts, preserving layout freedom for different engine configurations.
Data Source
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AI summary
Provide is a high-pressure fuel pump capable of improving the degree of freedom of layout of members to be attached to a pump body and a producing method thereof. Therefore, the high-pressure fuel pump includes the suction joint 51 that sucks fuel, the pump body 1 formed with the pressurizing chamber 11 that pressurizes the fuel sucked from the suction joint 51, and the discharge joint 12 that discharges the fuel pressurized in the pressurizing chamber 11. The pump body 1 is formed so that at least a part of the side surface portion thereof becomes a cylindrical portion 1a or a polygonal shape portion. At least one of the discharge joint 12 and the suction joint 51 may be fixed on the inner peripheral side InS with respect to the outermost peripheral portion of the cylindrical portion 1a or the polygonal shape portion of the side surface portion.