Vehicle Braking System Health Monitoring via Static Dynamic Segmentation
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Solution Overview
Problem
Current vehicle braking systems lack effective monitoring capabilities to detect issues such as fluidic leaks and air incorporation, which can affect braking performance and safety.
Innovation Solution
A vehicle braking system that includes a controller to monitor brake pedal inputs, brake actuation commands, and vehicle operation parameters, segmenting these into static and dynamic portions, and assessing the state of health of the braking system, with communication to both the driver and an off-board controller for evaluation and maintenance alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vehicle braking system includes monitoring capabilities to detect fluidic leaks and air incorporation, then the reliability and safety of the braking system is improved, but the device complexity increases
Solution Approach 1:
The braking event is segmented into static and dynamic portions, allowing separate evaluation of parameters during each phase. This segmentation enables detection of fluidic leaks during static braking and air incorporation during dynamic braking, improving reliability without requiring a completely new monitoring system
Solution Approach 2:
The system continuously monitors braking parameters and provides feedback to both the driver through on-board communication and off-board controllers. This feedback mechanism enables real-time detection of system degradation and maintains reliability through timely alerts while using existing communication infrastructure
2Measurement precision
If the system segments braking parameters into static and dynamic portions for separate evaluation, then the precision of detecting specific issues (fluidic leaks, air incorporation) is improved, but the complexity of data processing increases
Solution Approach 1:
Braking parameters are segmented into static and dynamic portions with distinct evaluation criteria. Static portion evaluation detects fluidic leaks by analyzing pressure stability, while dynamic portion evaluation detects air incorporation by analyzing pressure response characteristics. This targeted segmentation improves detection precision without requiring complex omnibus monitoring
Solution Approach 2:
Different evaluation methods are applied to different portions of the braking event based on their specific diagnostic value. The static portion is evaluated for pressure stability indicators of fluidic leaks, while the dynamic portion is evaluated for pressure response indicators of air incorporation, optimizing detection precision for each specific issue
3Reliability
If the system communicates braking parameters and state of health assessments to both on-board driver communication system and off-board controllers, then the safety and maintenance responsiveness is improved, but the loss of information and communication complexity increases
Solution Approach 1:
The communication system serves multiple functions: it communicates with the driver through on-board displays, transmits data to off-board controllers for remote monitoring, and stores parameters in memory for later analysis. This multi-functional communication architecture improves safety and maintenance responsiveness without requiring separate dedicated systems for each function
4Adaptability or versatility
If the system monitors both driver braking requests and autonomic braking commands, then the versatility and comprehensive monitoring coverage is improved, but the device complexity increases
Solution Approach 1:
The monitoring system is designed to handle both driver-initiated braking requests and autonomic braking commands through a unified control architecture. The controller evaluates parameters regardless of the braking source, enabling comprehensive monitoring coverage for mixed-autonomy operations without requiring separate monitoring systems for each braking mode
Data Source
AI summary
A vehicle braking system including a brake pedal in communication with a wheel brake, a brake actuation system, a braking system controller, an on-board driver communication system, and a controller is described. Parameters associated with a braking request, a brake actuation command and vehicle operation are monitored during each braking event, and segmented the into parameters associated with a static portion of the braking event and parameters associated with a dynamic portion of each braking event, evaluate the parameters associated with the static portion of the braking event and evaluate the parameters associated with the dynamic portion of the braking event, and assess a state of health of the braking system based upon the evaluation of the parameters. The assessment of the state of health of the braking system is communicated to a vehicle driver via the on-board driver communication system.