Parallel Bore High-Pressure Fuel Pump Assembly
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Solution Overview
Problem
Existing high-pressure fuel pumps are complex to manufacture and assemble due to the non-parallel orientation of the outlet valve bore and pressure relief valve bore, leading to increased machining difficulties and assembly challenges.
Innovation Solution
The outlet valve bore and pressure relief valve bore are designed to extend in geometrically parallel planes perpendicular to the longitudinal direction, allowing for easier machining and assembly, with optional configurations that reduce the number of parts and sealing points, and enhance the connection's pressure resistance by adjusting the cross-sectional area and connection length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the outlet valve bore and pressure relief valve bore are oriented in non-parallel planes, then the pump can accommodate complex internal contours and achieve compact design, but the machining difficulty and assembly complexity increase significantly
Solution Approach 1:
The patent applies asymmetry by positioning the outlet valve bore and pressure relief valve bore in non-parallel planes, creating an asymmetric spatial arrangement that enables compact internal contours while maintaining functional requirements. This asymmetric layout allows the pump housing to achieve a more compact design with optimized internal geometry.
2Volume of moving object
If the outlet valve bore and pressure relief valve bore are oriented in non-parallel planes, then compact internal contours are achieved, but the number of sealing points and components increases
Solution Approach 1:
The patent implements nesting by arranging the outlet valve bore and pressure relief valve bore in a nested configuration within the pump housing, where the bores are positioned in non-parallel planes to optimize space utilization. This nesting approach enables compact internal contours while reducing the overall volume of the pump housing.
3Ease of manufacture
If the outlet valve bore and pressure relief valve bore are oriented in parallel planes, then machining and assembly are simplified, but the internal contour complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the pump housing into distinct regions with separate bore arrangements. The outlet valve bore and pressure relief valve bore are positioned in parallel planes, allowing for segmented machining operations and simplified assembly processes. This segmentation enables easier manufacturing while maintaining functional integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design simplifies the manufacturing and assembly processes, reduces the number of components, and improves the reliability and pressure resistance of the high-pressure fuel pump connections.
Implementation Method 1
fuel flows from the high-pressure area into the low-pressure area when the pressure difference between fuel in the high-pressure area and fuel in the low-pressure area exceeds an opening pressure
Implementation Method 2
the pump housing comprises a pump body and a pump cover which are connected to one another, wherein the pump body and the pump cover delimit a damping region belonging to the low-pressure region, in which damping region a diaphragm damper is arranged
Data Source
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AI summary
The invention relates to a high-pressure fuel pump (10) with an outlet valve (37) and a pressure relief valve (22), wherein the outlet valve (37) is fixed in an outlet valve bore (37a) of the pump housing (12), wherein the pressure relief valve (22) is fixed in a pressure relief valve bore (22a) of the pump housing (12), and wherein the outlet valve bore (37a) and the pressure relief valve bore (22a) extend in geometrically parallel planes perpendicular to the longitudinal direction (LA) of the high-pressure fuel pump (10).