High-Pressure Pump Coil Assembly for Stable Fuel Discharge
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Solution Overview
Problem
High-pressure pumps experience vibration and wear issues due to loose fitting coil assemblies, leading to poor continuity and unstable fuel discharge when attached to internal combustion engines, resulting in operation malfunctions.
Innovation Solution
The high-pressure pump design includes a coil assembly with both ends supported by a fixed core and a cylinder member, reducing vibration and wear through secure connections via the first and second connection portions, ensuring stable fuel discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the coil assembly is loosely fitted in the high-pressure pump, then the device complexity is reduced, but the reliability deteriorates due to vibration and wear issues
Solution Approach 1:
The coil assembly is nested within the cylinder member, with the coil positioned inside the cylinder and the yoke forming a magnetic circuit with the cylinder member. This nested structure provides secure mechanical support while maintaining electrical functionality, eliminating the loose fitting issue without requiring complex external mounting mechanisms.
Solution Approach 2:
The yoke acts as an intermediary component between the coil and the cylinder member, forming a magnetic circuit that connects the electromagnetic coil to the mechanical plunger system. This intermediary structure ensures stable force transmission and reduces vibration by providing a rigid magnetic path while maintaining design simplicity.
2Reliability
If the coil assembly is securely connected via first and second connection portions, then the reliability is improved by reducing vibration and wear, but the device complexity increases
Solution Approach 1:
The first connection portion and second connection portion are merged into the cylinder member structure, which simultaneously serves as both the mechanical support and the magnetic circuit component. This combining approach provides secure mechanical support at both ends of the coil assembly without requiring separate complex mounting structures.
Solution Approach 2:
The cylinder member serves multiple functions: it acts as the mechanical support structure for the coil assembly, forms part of the magnetic circuit through the yoke, and provides the structural framework for the overall pump mechanism. This multi-functionality reduces the need for additional dedicated connection components.
3Power
If the coil assembly is energized to form a magnetic circuit with the yoke, then the power output is improved for fuel pressurization, but the use of energy increases
Solution Approach 1:
The yoke is pre-positioned and mechanically connected to the plunger system before coil energization occurs. This preliminary mechanical arrangement ensures that when the coil is energized, the magnetic field is immediately effective in driving the plunger, maximizing power output efficiency and reducing energy loss during the activation process.
Solution Approach 2:
The electromagnetic coil system replaces traditional mechanical pressurization mechanisms. By using electromagnetic fields generated through coil energization, the system achieves high power output for fuel pressurization with potentially lower energy consumption compared to purely mechanical alternatives, while the yoke provides an efficient magnetic circuit path.
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 stabilizes fuel discharge and reduces operation malfunctions by minimizing vibration and wear of the coil assembly, enhancing the reliability of the high-pressure pump.
Implementation Method 1
The coil sub-assembly includes a connector, a terminal provided in the connector, a coil having a cylindrical shape and connected to the terminal... The first yoke is arranged between the coil and the pressure chamber in an axial direction of the coil, and the first yoke forms a magnetic circuit by energization of the coil.
Implementation Method 2
The first yoke is arranged between the coil and the pressure chamber in an axial direction of the coil, and the first yoke forms a magnetic circuit by energization of the coil. The second yoke is arranged such that the coil is between the second yoke and the pressure chamber in the axial direction of the coil, and the second yoke forms a magnetic circuit by energization of the coil.
Data Source
AI summary
A high-pressure pump includes a valve member that allows or blocks a flow of fuel to a pressure chamber. A needle is reciprocable inside a cylinder member. One end of the needle facing the pressure chamber is provided with the valve member. Another end of the needle is provided with a movable core that faces a fixed core in an axial direction of the needle. The high-pressure pump includes a coil assembly that includes a coil, a terminal connected to the coil, and first and second yokes that form a magnetic circuit on both sides of the coil in the axial direction. The coil assembly is between a first connection portion and a second connection portion. The first connection portion connects the coil assembly and the fixed core. The second connection portion connects the coil assembly and the cylinder member.