High-Pressure Pump Coil with Nested Cylindrical Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The responsiveness of the movable core in high-pressure pumps is reduced due to the positioning of the movable core's end surface relative to the coil, leading to decreased attractive force and increased power consumption in the electromagnetic driving unit.
Innovation Solution
The high-pressure pump design includes a coil with multiple inner cylindrical surfaces of increasing diameter, positioning the movable core's end facing the fixed core between the center of the smallest diameter inner cylindrical surface and the outer cylindrical surface, enhancing the attractive force and responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the movable core's end surface is positioned at a conventional location relative to the coil, then the structure is simple, but the attractive force is reduced and responsiveness decreases
Solution Approach 1:
The patent applies local quality by creating multiple inner cylindrical surfaces with different diameters within the coil structure. These surfaces are positioned at different axial locations to create localized variations in magnetic flux density. The movable core's end surface is specifically positioned to face the smallest diameter inner cylindrical surface, which generates the highest magnetic flux density, thereby maximizing the attractive force and improving responsiveness without requiring a complete redesign of the entire coil structure.
2Speed
If the movable core is positioned to maximize attractive force, then responsiveness improves, but power consumption increases
Solution Approach 1:
The patent reduces power consumption while maintaining high responsiveness by concentrating the magnetic flux generation at specific locations rather than uniformly across the entire coil. The multiple inner cylindrical surfaces with different diameters create localized high-density magnetic fields that act precisely where needed on the movable core. This localized approach requires less total energy input compared to uniform magnetic field generation, while achieving the same or better responsiveness.
3Speed
If a single uniform coil structure is used, then manufacturing is simple, but the magnetic flux density distribution is insufficient for high responsiveness
Solution Approach 1:
The patent implements the nesting principle by placing multiple inner cylindrical surfaces within the single coil structure. These nested cylindrical surfaces are positioned concentrically within the coil, with each surface having a different diameter. This nested configuration allows the creation of complex magnetic flux density distributions using a single integrated coil component, avoiding the need for multiple separate coil assemblies while achieving high responsiveness.
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 increases the attractive force on the movable core, improving responsiveness and reducing power consumption in the electromagnetic driving unit.
Implementation Method 1
The coil generates an attractive force between the fixed core and the movable core to move the movable core and the needle in a closing direction when the winding portion is energized
Data Source
AI summary
A high-pressure pump includes a pressurizing chamber forming portion, a suction passage forming portion, a seat member, a valve member, a cylindrical member, a needle, a movable core, a biasing member, a fixed core, and a coil including a winding portion. The coil generates an attractive force between the fixed core and the movable core when the winding portion is energized. The coil includes an outer cylindrical surface and multiple inner cylindrical surfaces that have different diameters. The multiple inner cylindrical surfaces are arranged in order of increasing diameter in a direction toward a pressurizing chamber. The movable core has an end surface that faces the fixed core, and the end surface of the movable core is located between a center, in an axial direction, of a smallest diameter one of the plurality of inner cylindrical surfaces and a center, in an axial direction, of the outer cylindrical surface.