Pressure Regulating Valve Precision Adjustment via Magnetic Feedback
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Solution Overview
Problem
Existing pressure regulating valves in fuel injection systems for internal combustion engines require precise adjustment of the closing force, which is challenging due to manufacturing tolerances and material properties affecting the air gap between the armature and valve housing, leading to high assembly effort and expense.
Innovation Solution
A pressure regulating valve that measures the force and travel of the armature to precisely adjust the magnetic force, allowing for precise pressure regulation independent of mechanical tolerances and material properties, using a force and travel measuring system to determine the optimal air gap and shim thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the air gap between the armature and valve housing is adjusted to achieve precise pressure regulation, then the manufacturing precision and assembly effort increase due to low manufacturing tolerances required
Solution Approach 1:
The patent replaces the traditional mechanical adjustment method with a magnetic field-based measurement and adjustment system. Force and travel sensors detect the armature position and magnetic force, allowing precise pressure regulation to be achieved through electronic feedback rather than mechanical tolerance control, thereby reducing assembly complexity
Solution Approach 2:
The patent implements a feedback mechanism where force and travel sensors continuously monitor the armature position and magnetic force. This feedback loop enables automatic adjustment of the air gap to maintain precise pressure regulation without requiring manual adjustment or tight mechanical tolerances, reducing assembly effort
2Manufacturing precision
If the air gap is precisely controlled through component geometry, then the manufacturing precision improves, but the device complexity increases due to the need for precise component adaptation
Solution Approach 1:
The patent replaces mechanical precision control with a magnetic measurement and control system. Force and travel sensors detect the actual armature position and magnetic force, allowing the system to compensate for component variations electronically rather than requiring precise mechanical adaptation, thereby reducing device complexity
Solution Approach 2:
The patent changes the control parameter from fixed mechanical geometry to adjustable magnetic field parameters. By controlling the current in the electromagnet coil based on sensor feedback, the system can dynamically adjust the magnetic force to compensate for component variations, simplifying the overall device design
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
Enables precise adjustment of the closing force without mechanical tolerances, reducing assembly effort and expense, while maintaining consistent operating conditions by regulating the current supply to the electromagnet.
Implementation Method 1
By means of the current supply, a magnetic field is created, which penetrates the armature of the electromagnet and causes a magnetic force to act on the armature bolt
Implementation Method 2
Detecting this spacing is done according to the invention by measuring a force generated by the magnetic circuit
Data Source
AI summary
A pressure regulating valve in a fuel injection system for internal combustion engines for regulating the pressure in a fuel reservoir in which the operating pressure is adjusted by the dimensioning of an adjusting disk, whose function-determining axial height is ascertained with high precision by a force measuring system and by a travel measuring system by way of ascertaining a spacing between an end face of a valve member of the pressure regulating valve and a reference face of a housing of the pressure regulating valve.