Vibration Damper Valve Control for Compression and Rebound Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration dampers for motorcycles face challenges in maintaining optimal response qualities on varying driving surfaces, particularly due to deviations in working piston displacement speed, leading to jerky load and loss of contact with the ground, which affects driving comfort and propulsion.
Innovation Solution
A vibration damper with a cylinder and axially movable piston, featuring a fluid communication passage and adjustable valve devices for independent setting of pressure and traction stage damping, allowing for adaptive response qualities through adjustable throughflow openings and an adjustment needle mechanism that reacts to pressure differences, enabling precise control of damping fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single adjustment device is used for damping, then the device complexity is reduced, but the adaptability to different displacement speeds is insufficient
Solution Approach 1:
The damping adjustment device is segmented into multiple independent adjustment devices (first adjustment device for compression damping, second adjustment device for rebound damping). Each adjustment device controls specific valve devices independently, allowing separate optimization of damping characteristics for different movement phases and displacement speeds without increasing overall structural complexity
Solution Approach 2:
The adjustment devices enable dynamic adaptation of damping characteristics by allowing independent adjustment of compression and rebound damping values. This dynamic configurability permits the damper to adapt to varying displacement speeds and driving conditions, optimizing performance across different operational scenarios
2Ease of operation
If damping work is increased to counteract high displacement speed, then the working piston can be controlled, but jerky load occurs affecting driving comfort
Solution Approach 1:
The first adjustment device changes the damping parameter by controlling the opening degree of valve devices (26, 27) through adjustment elements (30, 31). This allows continuous adjustment of compression damping force to match driving conditions, preventing excessive damping forces that would cause jerky load while maintaining control over the working piston at high displacement speeds
3Speed
If the working piston displacement speed is high on uneven surfaces, then the damper responds to terrain, but the wheel loses contact with ground reducing propulsion
Solution Approach 1:
The adjustment devices provide feedback control by allowing real-time adjustment of damping characteristics based on observed wheel behavior and terrain conditions. When the wheel approaches loss of contact, the rebound damping can be adjusted to maintain optimal wheel-ground contact, ensuring continuous propulsion while still responding to terrain variations
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 solution enhances driving comfort by reducing phases without propulsion force and maintaining control by adapting to high and low displacement speeds, ensuring better contact with the driving surface and improved responsiveness.
Implementation Method 1
two valve devices (26, 27) which are adjustable for changing throughflow openings for the pressure stage
Implementation Method 2
having an adjustment needle (48), which is provided to change a second throughflow opening (49) for the traction stage
Implementation Method 3
A vibration damper with a cylinder and axially movable piston, featuring a fluid communication passage and adjustable valve devices for independent setting of pressure and traction stage damping
Data Source
AI summary
A vibration damper for use particularly on wheeled vehicles. The damper has a cylinder formed to receive damping fluid and a working piston axially moveable therein, which piston is arranged on a piston rod formed with an axial passage and which divides the inner space of the cylinder into first and second working spaces. The vibration damper has a fluid communication axial passage for a fluid flow from the second working space to the first working space, and has a first adjustment device for adjusting the pressure stage damping and a second adjustment device for adjusting the traction stage damping. The first adjustment device has adjustable valve devices to change throughflow openings for the pressure stage, and the second adjustment device has a setting rod arranged in the axial passage of the piston rod for changing a first throughflow opening of a third valve device for the traction stage.