Electromagnetic Intake Valve Gap Layout for Fuel Pump Impact Protection
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Solution Overview
Problem
Existing fuel pumps with electromagnetic intake valves are vulnerable to damage from impact forces exceeding anticipated levels, particularly affecting the coil winding and magnetic circuit components.
Innovation Solution
The fuel pump design includes a magnetic circuit configuration with a yoke surrounding the coil winding portion, where the gap between the coil winding portion and a predetermined part is set to allow contact upon impact, minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic circuit configuration portion and coil winding portion are disposed protruding outward from the pump body, then the electromagnetic intake valve can be effectively configured, but the components become vulnerable to impact forces from collisions
Solution Approach 1:
The patent sets the gap dimension between the coil winding portion and the yoke such that they come into contact with each other first when an impact force is applied. This contact arrangement acts as a cushioning mechanism that absorbs impact energy before it can reach and damage other critical components of the electromagnetic intake valve, thereby protecting the system from collision damage while maintaining proper operational configuration
2Strength
If the gap dimension is reduced to allow contact between coil winding portion and yoke during impact, then damage to components is suppressed, but the magnetic circuit performance may be affected
Solution Approach 1:
The patent applies local quality by creating a specific contact interface between the coil winding portion and the yoke at a predetermined location. The gap dimension is carefully controlled to allow contact only under impact conditions at this specific location, while maintaining proper magnetic circuit performance during normal operation. This localized contact arrangement provides impact protection without compromising overall magnetic circuit functionality
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 configuration effectively prevents damage to the electromagnetic intake valve components by absorbing impact forces, ensuring the integrity of the fuel pump's operation.
Implementation Method 1
a coil winding portion formed by winding an electromagnetic coil around a bobbin and a magnetic circuit configuration portion constituting a magnetic circuit when a current flows through the electromagnetic coil
Data Source
AI summary
A fuel pump includes an electromagnetic intake valve including a coil winding portion formed by winding an electromagnetic coil around a bobbin and a magnetic circuit configuration portion constituting a magnetic circuit when a current flows through the electromagnetic coil. The magnetic circuit configuration portion includes a yoke disposed so as to surround the coil winding portion, and a predetermined part facing, across a gap, the coil winding portion in a radial direction of the electromagnetic intake valve. The dimension of the gap is set such that the coil winding portion and the predetermined part come into contact with each other first when an impact force directed from an outer side to an inner side in the radial direction of the electromagnetic intake valve is applied to the yoke or the coil winding portion.