Vehicle Stabilizer Abnormality Detection via Roll Gradient Analysis
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Solution Overview
Problem
Components of stabilizer bar systems in vehicles, such as bushings and end links, often fail without being noticed, leading to unsafe driving conditions due to undetected degradation or failure, which can result in vehicle instability during lateral movements.
Innovation Solution
The use of centrally-located vehicle sensors and corner displacement sensors to monitor suspension system data, calculate a roll gradient, and set diagnostic notifications if the calculated roll gradient exceeds predetermined thresholds, thereby detecting abnormalities in stabilizer system components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stabilizer bar components (bushings, end links) are used without monitoring, then the vehicle maintains normal operation, but undetected degradation leads to unsafe driving conditions
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring suspension system data from sensors and comparing it against expected parameters. When degradation is detected through calculated roll gradient deviations, the system provides feedback via diagnostic notifications to alert operators of potential failures, enabling proactive maintenance before unsafe conditions develop.
Solution Approach 2:
The system performs preliminary detection of component degradation by monitoring suspension data and calculating roll gradients before actual failure occurs. By identifying trends and anomalies in the roll gradient data, the system alerts operators to potential issues with stabilizer bar components, allowing maintenance to be performed before the components fail and create unsafe driving conditions.
2Measurement precision
If diagnostic monitoring systems are added to detect stabilizer component failures, then early detection of abnormalities is achieved, but system complexity and cost increase
Solution Approach 1:
The diagnostic system leverages existing suspension displacement sensors already present in the vehicle for other functions. By repurposing these existing sensors to also monitor stabilizer bar component health through roll gradient calculations, the system achieves precise abnormality detection without adding dedicated monitoring hardware, thereby avoiding increased system complexity.
Solution Approach 2:
The patent makes existing suspension sensors serve multiple functions: their original purpose for suspension control plus the additional function of detecting stabilizer bar component degradation. The same sensors that monitor general suspension performance are also used to calculate roll gradients and detect abnormalities in stabilizer components, eliminating the need for separate dedicated monitoring equipment.
3Reliability
If roll gradient calculations are performed continuously, then early detection of component degradation is achieved, but processing requirements and energy consumption increase
Solution Approach 1:
The system performs roll gradient calculations periodically at predetermined intervals rather than continuously, balancing detection reliability with energy efficiency. The controller calculates the roll gradient at scheduled intervals based on available suspension data, ensuring sufficient monitoring frequency to detect component degradation while avoiding the excessive energy consumption of continuous real-time calculation.
Data Source
AI summary
Systems and methods to detect abnormalities within a stabilizer system for a vehicle. A method includes receiving suspension system data from one or more vehicle sensors, calculating a roll gradient from the suspension system data, determining whether the calculated roll gradient is greater than a predetermined roll gradient threshold, and setting a diagnostic notification if the calculated roll gradient is greater than the predetermined roll gradient threshold.