High-Pressure Pump Discharge Valve Structure for Compact Flow Control
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Solution Overview
Problem
Existing high-pressure pumps have complex configurations due to integrated tubular portions and stoppers, which can complicate manufacturing and increase radial size, limiting the accuracy and durability of valve opening/closing operations.
Innovation Solution
A high-pressure pump design featuring a valve and stopper configuration where the valve main body contacts the tubular portion's inner peripheral wall through its outer periphery, with primary and secondary passages formed separately from the tubular portion, allowing for simplified structure and reduced radial size, and an annular passage formed between primary and secondary passages to ensure smooth fuel flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the tubular portion and stopper are formed integrally in one piece, then the structure is simplified, but the radial size increases and manufacturing complexity increases
Solution Approach 1:
The patent divides the tubular portion and stopper into separate components. The tubular portion (41) and stopper (80) are formed separately and then assembled together, allowing each component to be optimized independently for size and manufacturing while maintaining structural simplicity through modular design.
2Device complexity
If the tubular portion and stopper are formed integrally in one piece, then the structure is simplified, but manufacturing complexity increases
Solution Approach 1:
By segmenting the tubular portion and stopper into separate manufacturable components, each can be produced using optimized manufacturing processes suitable for their specific geometric requirements, then assembled through standard joining methods, improving overall manufacturing feasibility.
Solution Approach 2:
The stopper is positioned within the tubular portion assembly, with the stopper main body (81) located inside the tubular portion (41), creating a nested configuration that simplifies the overall structure while maintaining separate manufacturability of each component.
3Ease of operation
If the valve moves over a long distance, then the valve opening/closing operation is more complete, but the accuracy and durability decrease
Solution Approach 1:
The movement limit surface (800) of the stopper is positioned to limit the valve's movement distance in advance. When the valve main body (71) contacts the movement limit surface (800), it prevents excessive travel, ensuring the valve operates within an optimized range that maintains both complete opening/closing functionality and high accuracy/durability.
Data Source
AI summary
A discharge valve includes: a valve main body that slidably contacts an inner peripheral wall of a tubular portion; and a primary passage that is formed at the valve main body and is located between the valve main body and the inner peripheral wall of the tubular portion. A stopper includes: a stopper main body that is formed separately from the tubular portion while the stopper main body is located on a side of the discharge valve that is opposite to the discharge valve seat; a movement limit surface that is configured to limit movement of the discharge valve in a direction away from the discharge valve seat; and a secondary passage that is formed at the stopper main body.