Stabilizer Bar Clutch Control for Adaptive Stiffness
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Solution Overview
Problem
Conventional stabilizer bars with clutches cannot actively adjust stiffness in response to changing driving conditions, leading to degraded ride quality and steering stability due to limited clutch coupling and release capabilities, especially during turns and on irregular roads.
Innovation Solution
An apparatus and method that includes a steering angular velocity detection unit, steering angle detection unit, and control unit to determine vehicle turning and road conditions, controlling a ball-shaped clutch coupling member on a groove-shaped surface to adjust clutch coupling time and position based on instantaneous turning velocity and road conditions, allowing for adaptive stiffness adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the clutch is coupled only at a specific angle in conventional stabilizer bars, then the clutch structure is simple, but the stabilizer bar cannot actively adjust stiffness according to changing driving conditions, degrading ride quality and steering stability
Solution Approach 1:
The clutch coupling mechanism is transformed from a static, fixed-angle design to a dynamic, continuously adjustable system. The ball-shaped clutch coupling member moves along a groove-shaped surface, enabling the clutch to couple and release at various angles depending on driving conditions, thereby actively adjusting stabilizer bar stiffness in real-time
Solution Approach 2:
A ball-shaped clutch coupling member is introduced as an intermediary element that moves along a groove-shaped surface. This ball member acts as a mediator between the clutch components, enabling smooth coupling and release operations while preventing direct impact and noise, and allowing precise control of clutch engagement timing
2Speed
If the clutch couples rapidly without time control, then the response to turning is fast, but noise and vibration occur during clutch engagement
Solution Approach 1:
The control unit determines the optimal clutch coupling time period in advance based on detected turning information before actual clutch engagement occurs. This preliminary timing determination allows the system to prepare for smooth coupling by selecting an appropriate time window, preventing abrupt engagement that would cause noise and vibration
Solution Approach 2:
The ball-shaped clutch coupling member moving along the groove-shaped surface provides beforehand cushioning by gradually guiding the clutch components into engagement. This gradual coupling process cushions the impact that would otherwise occur during rapid clutch engagement, significantly reducing noise and vibration
3Stability of the object's composition
If the stabilizer bar maintains high stiffness, then steering stability during turns is improved, but ride quality degrades on irregular roads due to increased suspension stiffness
Solution Approach 1:
The stabilizer bar system is transformed from a static high-stiffness design to a dynamic system that actively adjusts stiffness levels. The clutch couples during turns to provide high stiffness for steering stability, and releases on irregular roads to allow low stiffness for comfortable ride, with the control unit managing transitions based on real-time driving condition detection
Data Source
AI summary
An apparatus for controlling a stabilizer bar including: a steering angular velocity detection unit configured to detect a steering angular velocity of a vehicle in operation; a steering angle detection unit configured to detect a steering angle of the vehicle; and a control unit configured to determine whether the vehicle is turning, based on the steering angular velocity information and the steering angle information of the vehicle, and perform clutch coupling by driving a clutch of a stabilizer bar having the clutch applied thereto, when it is determined that the vehicle is turning. The control unit decides a clutch coupling time period in response to an instantaneous turning velocity of the vehicle, and performs the clutch coupling in response to the decided clutch coupling time period.