Electromagnetic Pressure Valve Spring Design
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Solution Overview
Problem
Existing electromagnetic pressure regulating valves in automatic transmissions face challenges in achieving precise pressure adjustment due to variations in geometry and materials, leading to instability and potential contamination, with current adjusting mechanisms being complex, costly, and prone to friction issues.
Innovation Solution
The design incorporates a spring with regions of different diameters, including thickened and thinned regions, which allows for precise adjustment with minimal friction and sealing, eliminating the need for additional sealing elements and reducing assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional adjusting mechanisms (adjusting screws, adjusting bushes, or adjusting caps) are used to calibrate the pressure balance, then the pressure adjustment precision is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes the complex adjusting screw, adjusting bush, or adjusting cap from the system entirely. Instead, it uses a simple adjusting element (such as a ball or disc) that can be easily inserted into or removed from a recess in the magnet core, thereby simplifying the device while maintaining adjustment capability.
Solution Approach 2:
The magnet core is designed with a separate recess that can accommodate the adjusting element. This segmentation allows the adjusting element to be independently positioned and secured, simplifying both the adjustment mechanism and the overall device structure.
2Measurement precision
If adjusting screws are used to vary spring initial tension, then the pressure calibration is improved, but friction and securing against relative rotation become problematic
Solution Approach 1:
The patent eliminates the adjusting screw entirely, replacing it with a simple adjusting element that fits into a recess. This removes the thread interface that causes friction and relative rotation issues, while still allowing precise adjustment of the spring initial tension.
3Measurement precision
If adjusting bushes or adjusting caps are used for spring adjustment, then the pressure calibration is improved, but additional sealing elements are required to prevent contamination
Solution Approach 1:
The patent removes the need for separate sealing elements by designing the adjusting element and recess interface to be inherently sealable. The adjusting element fits tightly into the recess, preventing contamination without requiring additional sealing components.
4Manufacturing precision
If conventional adjusting mechanisms are implemented, then the pressure regulation precision is improved, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent simplifies manufacturing by removing complex adjusting mechanisms and replacing them with a simple adjusting element that can be easily manufactured and assembled. The recess in the magnet core and the adjusting element itself are simple geometric features that are easy to produce.
Solution Approach 2:
The design segments the adjusting function into a separate, simple element that can be manufactured independently and assembled into the magnet core, simplifying both manufacturing and assembly processes.
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 approach enables precise and cost-effective adjustment of pressure regulating valves, protecting the internal components from contamination and ensuring long-term stability and precision in operation.
Implementation Method 1
a magnet portion for actuating the valve portion for regulating the pressure of the working medium, in which the magnet portion has a magnet housing with a pole piece
Implementation Method 2
a pressure activation threshold to be overcome in the regulation is generated by a spring force of a spring located between the armature and the adjusting ball
Data Source
AI summary
An electromagnetic pressure regulating valve has a valve portion for conducting and regulating the pressure of an operating medium, such as oil, a magnet portion for actuating the valve portion for regulating the pressure of the operating medium and having a magnet housing, in which a magnet core is located that as needed exerts magnetic force on an armature, located in the magnet housing, a spring with a spring force generating a pressure activation threshold to be overcome upon regulation and located between the armature and an adjusting ball that is located in a pole piece of the magnet housing, and the spring has regions of different diameter.