Vehicle Wheel Damping Device for Chattering Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Chattering phenomenon occurs in vehicles, particularly during high-speed cornering, due to wheel force fluctuations, leading to loss of control and potential falls, as existing damping devices fail to effectively manage these fluctuations.
Innovation Solution
A device with a first and second damping device, where the second damping device generates a phase-shifted damping force between 0 and 90 degrees relative to the wheel force, and the first damping device restricts periodic wheel force fluctuations by generating a damping force between 90 and 270 degrees phase-shifted, effectively counteracting wheel force fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damping force of the known damping device is increased to counteract wheel force fluctuations, then the chattering phenomenon is reduced, but the device complexity and weight increase significantly
Solution Approach 1:
The damping device is segmented into two independent damping devices with different phase characteristics. The first damping device provides primary damping force, while the second damping device provides phase-shifted damping force. This segmentation allows each component to be simpler while collectively solving the chattering problem effectively.
Solution Approach 2:
The damping characteristics of the two damping devices are dynamically optimized with different phase shifts (0-90 degrees for the second device relative to wheel force). This dynamic phase relationship allows the system to adapt to varying wheel force fluctuations without requiring excessive damping force from a single complex device.
2Device complexity
If a single damping device is used to restrict wheel force fluctuations, then the structure is simple, but it cannot effectively counteract the periodic fluctuations during high-speed cornering
Solution Approach 1:
The second damping device generates a damping force that is phase-shifted by 0-90 degrees relative to the wheel force, creating a periodic counter-action that specifically targets the fluctuation pattern during high-speed cornering. This periodic phase-shifted action complements the first damping device to effectively suppress chattering.
Solution Approach 2:
The phase shift parameter between the two damping devices is optimized to be 0-90 degrees relative to the wheel force. By changing the phase parameter rather than simply increasing damping force magnitude, the system achieves effective chattering control with simpler individual device structures.
3Speed
If the wheel force fluctuation amplitude is reduced to prevent slipping, then the cornering speed can be increased, but the damping force must be precisely phase-shifted to achieve this
Solution Approach 1:
The second damping device is configured with a predetermined phase shift (0-90 degrees) relative to the wheel force, providing preliminary phase-aligned counter-action before the wheel force fluctuations can cause slipping. This preliminary phase-shifted action prevents the need for complex real-time phase control during operation.
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 significantly reduces wheel force fluctuation amplitudes, preventing slipping and allowing higher cornering speeds by ensuring the wheel force remains above the minimum required, thus eliminating chattering and enhancing vehicle stability.
Implementation Method 1
a first damping device (16, 30) and a second damping device (16, 30), wherein the second damping device (16, 30) is designed to generate a second damping force which is phase-shifted to the wheel force between 0 and 90 degrees and the first damping device (16, 30) to restrict a largely periodic wheel force fluctuation amplitude
Implementation Method 2
generating a damping force which is phase-shifted to the wheel force between 90 and 270 degrees by the first damping device (16, 30), thereby limiting the wheel force fluctuation amplitude
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The device has damping unit that is operatively coupled to damping device for generating 0-90[deg] phase-shifted damping force. An amplitude unit generates 90-270[deg] phase shifted damping force which largely corresponds to multiple periods of wheel force fluctuation. The damping unit is designed for mechanical and/or electrical and/or magnetic and/or rheological and/or hydraulic and/or chemical generation of damping force. An independent claim is included for method for guiding wheel of vehicle.