Vehicle Damping Control Adapting to Load Conditions
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Solution Overview
Problem
Existing vehicle damping systems fail to provide comfortable damping across all driving dynamics situations, especially under high loads, leading to wheel 'bottoming out' and reduced comfort, which can cause damage to vehicle components.
Innovation Solution
A device and method that adjust damping parameters based on both driving dynamics and loading conditions, using existing sensors to detect load status and interpolating between pre-set parameter sets for unloaded and loaded vehicle states, ensuring comfortable damping in all situations while preventing wheel bottoming out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If damping is increased to prevent wheel bottoming out under high load, then wheel suspension reliability is improved, but vehicle comfort deteriorates due to harsher damping
Solution Approach 1:
The damping characteristics are made dynamically adjustable based on detected loading conditions. The control system automatically transitions between different damping parameter sets (R1-Rn for unladen, RB1-RBn for laden) to optimize both comfort and reliability in real-time
Solution Approach 2:
The system changes damping parameters (force parameters) based on the detected loading state. When high load is detected, the system switches from soft damping parameters to hard damping parameters, preventing bottoming out while maintaining comfort when unloaded
2Reliability
If a fixed hard damping setting is used to prevent bottoming out under high load, then wheel suspension reliability is improved, but comfort deteriorates in normal driving conditions
Solution Approach 1:
The system dynamically adapts damping characteristics based on loading detection. The control unit switches between soft damping (for comfort in normal conditions) and hard damping (for reliability under high load), eliminating the need for a fixed hard setting
Solution Approach 2:
The system uses feedback from load detection (height sensors in steel suspension or pressure sensors in air suspension) to automatically adjust damping parameters, ensuring the optimal damping characteristic is always applied based on actual vehicle loading
3Object-affected harmful factors
If loading condition detection and parameter adaptation is added to existing damping systems, then damping comfort is improved across all loads, but device complexity increases
Solution Approach 1:
The system uses existing sensors (height sensors in steel suspension or pressure sensors in air suspension) for dual purposes: their original function and load detection for damping control. This avoids additional sensors and reduces complexity
Solution Approach 2:
Multiple sets of damping parameters (R1-Rn for unladen, RB1-RBn for laden) are pre-calculated and stored in memory. The control system only needs to select and apply the appropriate pre-prepared parameter set based on detected loading, simplifying real-time control
Data Source
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AI summary
The invention relates to a device for controlled damping of a vehicle, comprising a means for storing a set of controller parameters R1 to Rn for controlling the damping of the unloaded vehicle as a function of the dynamic driving situation thereof 1 to n, a means for detecting a loading condition b of the vehicle, a means for adapting the set of controller parameters R1 to Rn as a function of the detected loading condition b to a set of controller parameters R1b to Rnb, and a means for damping the vehicle as a function of the set of controller parameters R1b to Rnb as a function of the dynamic driving situation thereof 1 to n.