Controlled Damper Bypass Sleeve for Single-Direction Valve Flow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current CVRTD shock absorbers with internal valves face complexity due to the need to operate in both rebound and compression directions, leading to technical difficulties in design and functionality.
Innovation Solution
A damper assembly with a piston that divides the fluid compartment into rebound and compression chambers, featuring a proportional valve and check valves to regulate fluid flow in a single direction during both strokes, simplifying the design and enabling seamless control of damping force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an internal valve is used in a CVRTD damper, then the damping force can be controlled in real-time, but the design becomes very complex and technical difficulties arise due to operating in two directions
Solution Approach 1:
The internal valve is segmented into two separate one-way valves: a compression valve for compression stroke control and a rebound valve for rebound stroke control. Each valve handles only one direction of fluid flow, simplifying the design of each individual valve while maintaining real-time damping control capability through electronic solenoids that regulate fluid flow in their respective directions
Solution Approach 2:
Instead of using a single bi-directional valve as in conventional designs, the invention inverts the approach by using two unidirectional valves working in opposite directions. This inversion simplifies each valve's design since they only need to handle flow in one direction, eliminating the complexity of designing a valve that must operate reliably in both compression and rebound strokes
2Adaptability or versatility
If a single bi-directional valve is used, then the damper can control both compression and rebound strokes, but the valve design becomes extremely complex
Solution Approach 1:
The bi-directional valve function is segmented into two separate unidirectional valves. The compression valve handles fluid flow during compression stroke, while the rebound valve handles fluid flow during rebound stroke. This segmentation allows each valve to be simpler in design since they only need to control flow in one direction, yet together they provide complete bi-directional control capability
Solution Approach 2:
A common fluid passage serves as an intermediary that connects both the compression valve and rebound valve to the damper rod chamber. This intermediary passage allows fluid to flow between the valves and the chamber in both directions, enabling the two unidirectional valves to work together to control both compression and rebound strokes without requiring each valve to be bi-directional
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 provides a simplified and effective CVRTD damper assembly that can seamlessly control damping force in both compression and rebound strokes, addressing the complexity issues of internal valve designs and enhancing vehicle suspension stability.
Implementation Method 1
a proportional valve configured to regulate fluid flow between the cross-flow passage and an outlet passage based on an electrical control signal
Implementation Method 2
a first check valve configured to allow fluid flow from the compression chamber into the cross-flow passage while blocking fluid flow in an opposite direction
Implementation Method 3
a second check valve configured to allow fluid flow from the rebound chamber into the cross-flow while blocking fluid flow in an opposite direction
Implementation Method 4
a piston slidably disposed in the tube and dividing the fluid compartment into a rebound chamber and a compression chamber
Data Source
AI summary
A damper assembly comprises a tube defining a fluid compartment; and a piston slidably disposed in the tube and dividing the fluid compartment into a rebound chamber and a compression chamber. The piston defines a cross-flow passage and includes: a first check valve configured to allow fluid flow from the compression chamber into the cross-flow passage while blocking fluid flow in an opposite direction, a second check valve configured to allow fluid flow from the rebound chamber into the cross-flow while blocking fluid flow in an opposite direction, and a proportional valve configured to regulate fluid flow between the cross-flow passage and an outlet passage based on an electrical control signal. Fluid flow is directed through the proportional valve in a same direction during each of a compression stroke and a rebound stroke.