Wheel End Fault Detection via Sensor Cross-Validation
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Solution Overview
Problem
Conventional tire monitoring systems are prone to errors and lack robust detection of wheel end fault conditions, often misidentifying issues or failing to implement appropriate vehicle responses due to malfunctioning sensors and simplified monitoring techniques.
Innovation Solution
An enhanced wheel data processing unit that analyzes data from tire air temperature sensors and antilock brake system (ABS) wheel speed sensors to detect wheel end fault conditions, initiating a warning response, including potential engine shutdown, by validating temperature data and processing fault codes to determine the accuracy of sensor readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional tire monitoring systems use simplified monitoring techniques to measure pressure and signal alarms, then the system complexity is reduced and ease of operation is improved, but measurement precision and reliability deteriorate due to sensor malfunctions and false alarms
Solution Approach 1:
The patent combines multiple monitoring functions into a single integrated system that simultaneously monitors tire pressure, tire temperature, and wheel speed sensor fault codes. This merging allows the system to cross-validate data from different sensors, improving measurement precision while maintaining ease of operation through a unified monitoring interface.
Solution Approach 2:
The patent introduces an intermediary processing layer that analyzes fault codes from wheel speed sensors and correlates them with tire pressure and temperature data. This intermediary validation mechanism filters out false alarms caused by malfunctioning sensors while preserving true fault detections, thereby improving measurement precision without complicating the user interface.
2Device complexity
If conventional tire monitoring systems merely measure pressure and signal alarms when pressure is outside predefined bands, then the device complexity is minimized, but reliability deteriorates due to false alarms from malfunctioning sensors
Solution Approach 1:
The patent implements feedback loops where fault codes from wheel speed sensors are continuously monitored and used to validate tire pressure and temperature readings. When a sensor malfunction is detected through fault codes, the system adjusts its alarm generation logic accordingly, preventing false alarms while maintaining a relatively simple device architecture.
Solution Approach 2:
The patent performs preliminary validation of sensor readings by checking for wheel speed sensor fault codes before generating tire pressure alarms. This preliminary action filters out potentially erroneous data from malfunctioning sensors, improving reliability while adding minimal complexity to the existing monitoring system.
3Object-affected harmful factors
If the system initiates vehicle shutdown based on detected wheel end conditions, then safety is improved, but productivity decreases due to vehicle停运
Solution Approach 1:
The patent implements a graduated response system where vehicle shutdown is initiated only when wheel end fault conditions exceed predetermined thresholds. For less severe conditions, the system provides warnings and alerts without forcing complete vehicle shutdown, thereby maintaining productivity while still addressing safety concerns through proportional responses.
Data Source
AI summary
An enhanced wheel data processing unit may analyze tire air temperature data from a tire pressure monitoring system (TPMS) and antilock brake system (ABS) wheel speed sensor fault codes from an ABS controller within a vehicle. When the enhanced wheel data processing unit determines that the tire air temperature is above a predetermined threshold for a given tire and that an ABS wheel speed sensor fault code exists for the wheel end corresponding to the same tire, the enhanced wheel data processing unit may initiate a vehicle shutdown or derate procedure. The vehicle shutdown or derate procedure may include instructions to give an operator of the vehicle a warning indicator for a predetermined time period before shutting down or derating the engine power to the vehicle.