Roll Block System for Damping Resonance Oscillations in Motor Vehicles
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Solution Overview
Problem
Existing methods fail to effectively counteract the resonance oscillation-induced jumping in motor vehicles, which can lead to loss of control and safety risks, especially at high speeds, as they either require complex and ineffective hydraulic interventions or rely on increasing rolling inertia or yaw stiffness.
Innovation Solution
A method involving a roll block system that detects resonance oscillations and actuates to dampen the rolling kinematic mechanism, using sensors and actuators to intermittently block the rolling motion of the front wheels, thereby reducing the oscillations before they become dangerous.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex hydraulic interventions are used to counteract resonance oscillations, then the effectiveness against jumping is improved, but the device complexity increases and implementation becomes difficult
Solution Approach 1:
The patent extracts the essential function of counteracting resonance oscillations from complex hydraulic systems and implements it through a simplified mechanical roll block system. The roll block directly blocks the rolling motion of wheels during resonance events, removing the need for complex hydraulic control mechanisms while maintaining effectiveness against jumping phenomena.
Solution Approach 2:
The patent replaces the proposed complex hydraulic intervention system with a purely mechanical roll block system. The roll block uses mechanical force to directly counteract the resonance oscillations by blocking wheel rolling motion, substituting complex hydraulic control with simple mechanical action that is easier to implement and maintain.
2Reliability
If rolling inertia is increased to reduce jumping, then the resistance to resonance oscillations is improved, but the weight of the vehicle increases
Solution Approach 1:
The roll block system is pre-positioned and ready to activate before resonance oscillations fully develop. Sensors detect early signs of resonance and trigger the roll block to intervene preemptively, preventing full jumping development without requiring excessive rolling inertia. This preliminary action allows effective resonance counteraction with minimal additional vehicle weight.
Solution Approach 2:
The system dynamically changes the rolling resistance parameter by activating the roll block only during resonance events. Instead of permanently increasing rolling inertia through added mass, the system temporarily increases rolling resistance when needed, achieving resistance to jumping without permanent weight increase.
3Reliability
If yaw stiffness is increased through reinforcement bars, then the prevention of jumping is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent transitions from static frame reinforcement (fixed yaw stiffness through reinforcement bars) to a dynamic system that adjusts rolling resistance in real-time. The roll block system activates only when resonance is detected, providing temporary increased resistance without permanent frame modifications. This dynamic approach prevents jumping without the manufacturing complexity of reinforced frames.
Solution Approach 2:
The roll block acts as an intermediary mechanism between the wheel and the ground, providing temporary increased rolling resistance during resonance events. Instead of modifying the frame structure itself (which would require complex manufacturing), the system introduces a separate mechanical intermediary that achieves the same protective function with simpler fabrication.
4Reliability
If shock absorber characteristics are modified to dampen jumping, then the damping capability is improved, but the device complexity increases and effectiveness remains limited
Solution Approach 1:
The patent extracts the essential damping function from complex shock absorber systems and implements it through a simple mechanical roll block. The roll block directly blocks the rolling motion that causes resonance, separating the resonance counteraction function from the suspension system's shock absorption function. This extraction achieves effective damping with minimal device complexity.
Solution Approach 2:
The patent replaces complex hydraulic shock absorber modifications with a simple mechanical roll block system. Instead of modifying shock absorber hydraulics to achieve better damping, the system uses direct mechanical blocking of wheel rolling during resonance, substituting complex hydraulic control with simple mechanical action that is both effective and easy to implement.
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 approach allows for the damping of resonance oscillations and subsequent jumping phenomena, preventing loss of control and enhancing safety by intervening automatically or through driver input, making the system operationally reliable and easy to implement.
Implementation Method 1
detecting a resonance oscillation which is triggered while driving the motor vehicle and generates an alternate jumping of the rolling kinematic mechanism
Implementation Method 2
actuating said roll block system (100) in presence of said active resonance signal... suitable to damp the resonance oscillations resulting in a progressive damping of the alternate jumping
Data Source
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AI summary
The present invention relates to a method of contrasting the jumping triggered by a resonance oscillation in a motor vehicle with three or four wheels. Such a motor vehicle comprises: - a forecarriage frame 16; - at least a pair of front wheels 10', 10' kinematically connected to each other and to the forecarriage frame 16 by means of a rolling kinematic mechanism 20; - a roll block system 100 suitable to block the rolling of the two front wheels 10', 10". Such a roll block system 100 acts directly or indirectly on said rolling kinematic mechanism. The method being characterized in that it comprises the operating steps of: - a) detecting a resonance oscillation which is triggered while driving the motor vehicle and generates an alternate jumping of the rolling kinematic mechanism, wherein said step a) of detecting generates selectively: an active resonance signal and a passive resonance signal; - b) actuating the roll block system in presence of said active resonance signal; - b') keeping said roll block system (100) neutral in presence of said passive resonance signal. The above step of actuating the roll block system is suitable to damp the resonance oscillations resulting in a progressive damping of the alternate jumping of the rolling kinematic mechanism and thus of the front wheels, until annulling said oscillations.