Pilot Stage Damping Valve for Scalable Push-Pull Force Ratios
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Solution Overview
Problem
Existing damping valve devices for vibration dampers have insufficient damping force ratios between pull and push directions, which are not scalable for varying operational demands.
Innovation Solution
A pilot stage valve with two hydraulically separated control chambers and pressurized surfaces for different incident flow directions, allowing for a larger damping force difference and improved scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pilot stage valve with two hydraulically separated control chambers and pressurized surfaces is used, then the damping force ratio scalability is improved, but the device complexity increases
Solution Approach 1:
The pilot stage valve is divided into two hydraulically separated control chambers (first control chamber and second control chamber), each independently controlling different aspects of the damping force. This segmentation allows independent adjustment of damping characteristics for different flow directions, achieving scalability of damping force ratio while maintaining manageable complexity through modular design
Solution Approach 2:
The invention introduces a new dimension of control by adding the second control chamber with its own pressurized surface, moving beyond the conventional single control chamber design. This dimensional expansion in the hydraulic control architecture enables independent manipulation of damping forces in different directions, achieving superior adaptability without proportionally increasing overall device complexity
2Force
If pressurized surfaces of different size are provided at the main stage valve, then the damping force ratio is improved, but the installation space requirement increases
Solution Approach 1:
The pilot stage valve acts as an intermediary device that amplifies the control effect of hydraulic pressure. By using the pilot stage valve with its two control chambers, the system achieves large damping force ratios without requiring proportionally large pressurized surfaces at the main stage valve, as the pilot stage valve mediates the pressure distribution efficiently
Solution Approach 2:
The invention replaces direct mechanical sizing of large pressurized surfaces with a hydraulic control mechanism (pilot stage valve system). Instead of relying solely on large surface areas at the main stage valve to achieve the desired damping force ratio, the system uses hydraulic pressure multiplication and distribution through the pilot stage valve, reducing the required installation space
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
The solution achieves a significant increase in damping force levels between outward and inward piston movements, enhancing the damping performance and reliability of the vibration damper.
Implementation Method 1
The first pressurized surface and the second pressurized surface are loaded during an incident flow proceeding from one of the two working chambers
Implementation Method 2
a pilot stage valve for an actuation of a main stage valve with an incident flow proceeding from a working chamber on the piston rod side and from a working chamber remote of the piston rod
Data Source
AI summary
An adjustable damping valve device for a vibration damper comprises a damping valve housing in which a pilot stage valve for hydraulic control of a main stage valve is arranged. The damping valve housing is hydraulically connected to a working chamber on the piston rod side and a working chamber remote of the piston rod of a working cylinder of the vibration damper. The damping valve device has a check valve arrangement for the rectification of a control volume flow proceeding from the working chambers of the working cylinder to the pilot stage valve. A pilot stage valve body of the pilot stage valve has a first pressurized surface for an incident flow from the working chamber on the piston rod side and a second pressurized surface for an incident flow from the working chamber remote of the piston rod.