Adjustable Stop Damping Valve for Precise Throttle Cross Section
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Solution Overview
Problem
Maintaining the minimum throttle cross section of the damping valve device is crucial for achieving maximum damping force, but existing solutions either increase production costs or are inefficient due to production deviations.
Innovation Solution
An adjustable stop is designed to compensate for production tolerances, allowing for variable adjustment of the valve element's position relative to the piston rod, which can be achieved through a segment-like stop on the valve carrier or a stop sleeve supported on the piston, enabling precise alignment and deformation for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the dimensional accuracy of components determining the throttle cross section is increased, then the minimum throttle cross section is maintained more accurately, but the production costs increase significantly
Solution Approach 1:
The patent applies the dynamics principle by making the stop adjustable rather than fixed. The stop can be positioned at different locations along the valve carrier to compensate for production deviations. This dynamic adjustment capability allows the system to maintain accurate throttle cross sections without requiring high-dimensional accuracy in all components, thereby reducing production costs while achieving the desired precision in operation.
Solution Approach 2:
The patent employs parameter changes by allowing the stop position to be varied. By changing the position parameter of the stop along the valve carrier, the system compensates for variations in component dimensions. This enables maintenance of the minimum throttle cross section without requiring tight manufacturing tolerances on all parts, thus avoiding increased production costs.
2Reliability
If a fixed stop is used to limit valve element widening movement, then the throttle cross section is controlled, but production deviations cause inaccurate throttle cross section maintenance
Solution Approach 1:
The patent transforms the fixed stop into an adjustable stop that can be dynamically repositioned. This allows the stop to adapt to production deviations in the valve element and other components. By adjusting the stop position, the system maintains reliable throttle cross section control despite variations in manufacturing precision, effectively decoupling reliability from strict manufacturing precision requirements.
3Manufacturing precision
If the stop is made adjustable to compensate for production tolerances, then the throttle cross section accuracy is maintained, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the stop into adjustable segments or positioning it on a segmented valve carrier. This allows independent adjustment of the stop position without requiring complex mechanisms. The segmented approach enables simple repositioning to compensate for production tolerances while maintaining throttle cross section accuracy, adding minimal complexity to the device.
4Force
If the valve element diameter is made variable for damping control, then the damping force is optimized, but the valve element position becomes difficult to control accurately
Solution Approach 1:
The patent introduces the adjustable stop as an intermediary element between the valve element and the valve carrier. This intermediary stop provides a reference point that limits the widening movement of the variable diameter valve element. By adjusting the stop position, the system maintains accurate control of the valve element's maximum position, enabling optimized damping force while preserving positional control accuracy.
Data Source
AI summary
Damping valve device including a valve carrier having a circumferential annular groove in which a valve element, which can be changed in terms of diameter, forms a throttle point together with a flow guiding surface. The throttle point transitions from a through-flow position into a throttled position as a function of the flow rate of the damping medium, and at the same time the maximum widened position of the valve element which is determined by a stop is limited, the stop being designed to be adjustable.