Vehicle Lateral Acceleration Sensor Good Check Controller
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Solution Overview
Problem
Current vehicle systems lack the ability to automatically determine when a sensor malfunction caused by electromagnetic interference has resolved, often requiring manual intervention to clear errors, which can lead to false alarms or missed malfunctions.
Innovation Solution
A controller with a malfunction monitoring module, failure handling module, and signal checking module that performs a 'good check' on sensors to determine if they have returned to normal operation, using drive cycle information and signal checks to reset systems and deactivate warning lights when malfunctions are cleared.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual intervention is required to clear sensor errors, then system reliability is improved by avoiding false automatic recoveries, but ease of operation deteriorates due to requiring technician access
Solution Approach 1:
The system performs self-diagnosis by automatically detecting when sensor signals return to acceptable ranges after malfunctions. The controller continuously monitors sensor outputs and autonomously determines when error conditions have resolved, eliminating the need for technician intervention to clear errors while maintaining reliable detection through programmed evaluation criteria.
Solution Approach 2:
The system implements continuous feedback monitoring of sensor signals against predefined acceptable ranges. When sensor outputs return within acceptable ranges after a malfunction, the system receives feedback about this condition and automatically responds by clearing error flags and resetting system states, creating a closed-loop automatic recovery mechanism.
2Measurement precision
If automatic good checking is implemented with smaller tolerances, then measurement precision is improved for detecting sensor recovery, but false good checks increase reducing reliability
Solution Approach 1:
The system establishes predefined acceptable signal ranges and evaluation criteria before sensor malfunction detection is needed. These predetermined thresholds and conditions are programmed in advance to guide the automatic evaluation process, ensuring consistent and reliable determination of when sensor signals have recovered without requiring real-time judgment calls that could lead to false positives.
Data Source
AI summary
A controller for indicating whether a previously-detected, acceleration-sensor malfunction no longer exists. The controller includes an electronic memory and an electronic processing unit connected to the electronic memory. The electronic processing module includes a malfunction monitoring module, a failure handling module, and a signal checking module. The signal checking module performs a signal check after the malfunction monitoring module generates the fault signal. The signal check includes executing a signal check function with a lateral acceleration signal. Also disclosed is a vehicle including the controller, and a method executed by the controller.