Solenoid Valve Contact Surface Angle for Brake Pressure Accuracy
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Solution Overview
Problem
In solenoid valves for hydraulic brake systems, production-related distortions in fiber-reinforced plastic components lead to inaccurate pressure settings due to varying magnetic forces caused by loose guidance and different component orientations, resulting in tilting of the armature and fluctuations in pressure setting accuracy.
Innovation Solution
The solenoid valve design features a contact surface on the valve element with a non-right-angled intersection angle relative to its central axis, compensated by projections or pads of defined heights and positions, which aligns the armature correctly during movement, ensuring consistent magnetic forces and improved pressure accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fiber-reinforced plastic components are used for the valve element, then manufacturing ease and cost are improved, but production-related distortions occur leading to inaccurate pressure settings
Solution Approach 1:
The patent applies preliminary action by pre-compensating for production distortions through a specifically designed contact surface geometry. The contact surface is angled relative to the central axis of the valve element, which anticipates and counteracts the distortion that occurs during fiber-reinforced plastic manufacturing, ensuring accurate pressure settings despite the manufacturing process limitations
2Ease of operation
If loose guidance is used for the valve element, then ease of assembly is improved, but component orientation varies causing armature tilting and pressure fluctuations
Solution Approach 1:
The patent applies asymmetry by designing the contact surface with a specific angle relative to the central axis of the valve element, rather than using a symmetric perpendicular arrangement. This asymmetric geometry compensates for orientation variations and prevents armature tilting, maintaining reliable pressure settings while allowing loose guidance for ease of assembly
3Device complexity
If conventional right-angled contact surface is used, then manufacturing simplicity is improved, but armature tilting occurs due to production distortions
Solution Approach 1:
The patent applies parameter changes by modifying the contact surface angle from the conventional 90 degrees to a specific non-right angle. This parameter change compensates for production distortions in fiber-reinforced plastic components, preventing armature tilting and ensuring accurate pressure settings while maintaining relatively simple manufacturing
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 compensates for production-related distortions, reducing armature tilting and variations in magnetic forces, resulting in enhanced pressure setting accuracy and uniform magnetic forces by maintaining a consistent relative position between the armature and valve element.
Implementation Method 1
can be actuated in the closing direction with respect to the valve seat by means of an electromagnetic actuator
Data Source
AI summary
A solenoid valve, for controlling a brake pressure of a wheel brake of a slip-regulatable hydraulic brake system for a motor vehicle, includes a valve element, valve insert, valve seat, spring device, electromagnetic actuator, and armature. The valve element is longitudinally movably positioned at least partially in the valve insert, positioned between the armature and the valve seat, and configured to interact with the valve seat. The spring device, in an assembled position, has a force component acting on the valve element in an opening direction with respect to the valve seat. The electromagnetic actuator is configured to act on the valve element in a closing direction with respect to the valve seat. The valve element has a contact surface operatively connecting the valve element and armature, and configured such that a central axis of the valve element and the contact surface form a non-rectangular intersection angle.