Bleed-Base Valve Assembly for Variable Damper Resistance
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Solution Overview
Problem
Current damper systems in automotive suspension lack the ability to provide variable and tunable resistance based on movement speed and direction, which affects the vehicle's ride comfort and handling by not effectively managing fluid flow between chambers.
Innovation Solution
The damper assembly incorporates a cylinder end assembly with a pressure tube, piston, reserve tube, and movable discs that control fluid flow between chambers, allowing for adjustable resistance by altering the fluid flow path and rate based on movement thresholds, using a check disc and orifice disc to regulate fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a damper system uses fixed fluid flow control, then the structure is simple, but the ability to provide variable resistance based on movement speed and direction is limited
Solution Approach 1:
The cylinder end assembly incorporates movable check discs and orifice discs that dynamically adjust fluid flow resistance based on movement speed and direction. The check disc moves between a first position (spaced from orifice disc) and a second position (abutting orifice disc), creating variable flow paths that adapt to changing operational conditions, thereby providing tunable resistance without requiring a completely complex system architecture
Solution Approach 2:
The system changes fluid flow parameters by altering the position of check discs and orifice discs relative to each other. When the check disc moves from the first position to the second position, it changes the opening size and fluid flow characteristics, enabling variable resistance adjustment based on movement thresholds while maintaining a relatively simple overall structure
2Ease of operation
If the damper assembly uses multiple movable discs to control fluid flow, then resistance can be adjusted based on movement thresholds, but the device complexity increases
Solution Approach 1:
The check disc and orifice disc arrangement operates autonomously based on fluid pressure and movement thresholds. The check disc automatically moves between positions in response to fluid flow conditions, providing self-regulating resistance control without requiring external actuation or complex control mechanisms, thus maintaining ease of operation despite multiple movable components
3Speed
If fluid flow rate is increased between chambers, then the damper responds faster to movement, but the resistance to movement decreases
Solution Approach 1:
The system dynamically adjusts the balance between response speed and damping force by moving the check disc between positions. At higher movement speeds, the check disc moves to positions that increase fluid flow rate for faster response. At lower speeds, the arrangement provides higher resistance through restricted flow paths, thereby maintaining the desired force-response characteristics across different operating conditions
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 enables the damper assembly to provide responsive force that adapts to movement speed and direction, enhancing vehicle ride comfort and handling by optimizing fluid flow resistance, thereby improving traction and reducing vertical acceleration of the vehicle.
Implementation Method 1
movement of the piston within a pressure tube of the dampener, e.g., when the damper is moved toward a compressed or extended position
Implementation Method 2
The check disc and the orifice disc limit a rate of such fluid flow by condoling a size an opening defined therebetween through which fluid may flow
Implementation Method 3
a spring positioned between the check disc and the cylinder end, the spring urging the check disc toward the first position
Data Source
AI summary
A damper assembly includes a pressure tube defining a first chamber and a piston movable within the first chamber. The damper assembly includes a reserve tube defining a second chamber. The damper assembly includes a cylinder end attached to the pressure tube, the cylinder end defining a passage in fluid communication with the first chamber and the second chamber. The damper assembly includes an orifice disc attached to the cylinder end and defining an opening in fluid communication with the passage. The damper assembly includes a check disc attached to the cylinder end, the check disc movable from a first position spaced from orifice disc to a second position abutting the orifice disc. Movement of the piston within the first chamber causes fluid flow between the first chamber and the second chamber via the passage of the cylinder end. The check disc and the orifice disc limit a rate of such fluid flow.