Telescopic Stabilizer Bar for Vehicle Roll Control
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Solution Overview
Problem
The existing stabilization devices in motor vehicles, such as agricultural tractors, suffer from premature wear and structure-borne noise due to the rigid design of Panhard rods, which lead to undesirable sideways movement and the transmission of vibrations, causing shearing forces and noise issues.
Innovation Solution
A stabilization device with a deflatable stabilizer bar and a hydraulic compensating cylinder, actuated by a control unit using sensor inputs, allows for adjustable support during rolling and pitching movements, preventing excessive shearing forces and noise transmission by blocking or unblocking the deflection between bar segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid stabilizer bar (Panhart rod) is used to provide lateral support, then rolling stability is improved, but shearing forces increase causing premature wear and structure-borne noise
Solution Approach 1:
The stabilizer bar is designed with a telescopic mechanism allowing it to dynamically adjust its length. The bar segments can extend and retract relative to each other, transforming the rigid structure into a dynamic one that can adapt to varying road conditions, thereby reducing shearing forces while maintaining stability when needed.
Solution Approach 2:
The length parameter of the stabilizer bar is made variable through the telescopic mechanism. By changing the effective length of the bar according to driving conditions, the system optimizes the balance between providing lateral support and minimizing harmful shearing forces on mounting components.
2Stability of the object's composition
If a rigid stabilizer bar is used to prevent sideways movement, then lateral support is improved, but structure-borne noise transmission increases
Solution Approach 1:
The dynamic telescopic mechanism allows the stabilizer bar to flex and absorb vibrations rather than rigidly transmitting them. This dynamic behavior reduces the transmission of structure-borne noise from the vehicle chassis to the cab while maintaining lateral support functionality.
3Reliability
If the stabilizer bar is made telescopic to reduce wear and noise, then reliability is improved, but device complexity increases
Solution Approach 1:
The stabilizer bar is divided into multiple segments that can move relative to each other. This segmentation allows the bar to achieve telescopic functionality through relatively simple individual components rather than requiring a complex monolithic structure, making the increased complexity more manageable.
4Ease of operation
If the stabilizer bar length is dynamically adjusted to optimize performance, then ride quality is improved, but control system complexity increases
Solution Approach 1:
The telescopic stabilizer bar system is designed to operate automatically based on vehicle motion and road conditions, adjusting its length without requiring direct driver intervention. The system serves itself by utilizing the vehicle's dynamic conditions to trigger appropriate length adjustments, simplifying the control interface while maintaining optimized ride quality.
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 reduces wear and noise transmission by dynamically adjusting the stabilizer bar's length to prevent sideways movement and absorb vibrations, thereby extending the lifespan of components and improving the overall ride quality.
Implementation Method 1
The stabilizer bar has two bar segments which can be deflected relative to one another in the direction of its course, with a deflection occurring between the bar segments being able to be blocked by means of a fixing means. The fixing means has a hydraulic compensating cylinder connecting the rod segments, whereby a hydraulic compensating volume flow caused in the compensating cylinder can be interrupted by means of a blocking element to block the deflection occurring between the rod segments.
Data Source
Figure 1
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AI summary
The stabilization device (12) has multiple spring elements (14) for vibratory supporting a vehicle body (18) that is mobile arranged relative to a vehicle structure (16).A stabilizer bar (46) has two bar segments (52,54), which are deflected in direction of running to each other. A locking unit (56) is blocked between the bar segments.