Steering Gear High Friction Detection via Sensor Correlation
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Solution Overview
Problem
The existing steering systems in vehicles fail to detect unacceptably high levels of friction caused by rust in the steering gear, leading to increased operational force requirements, potential power assist failure, and costly repairs, as the driver is not alerted to these issues in a timely manner.
Innovation Solution
A high friction detection system utilizing sensors to monitor vehicle and steering system parameters, a correlation block to compare these against normal values, and a trigger block to activate a warning when abnormal conditions are detected, employing the Mahalanobis-Taguchi System (MTS) for pattern recognition to identify rust-related abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If power assist is provided to the steering system, then the force required to steer the vehicle is reduced, but the driver is not aware of increased friction levels due to rust
Solution Approach 1:
The patent implements a feedback mechanism by installing sensors (torque sensor, angle sensor, speed sensor) that continuously monitor steering system parameters and provide this information to a control unit. The control unit processes the data and provides feedback to the driver through warning indicators when abnormal friction levels are detected, thus resolving the information loss caused by power assist
2Duration of action of stationary object
If rust is allowed to develop in the steering gear, then the steering system continues to operate, but the force necessary to operate the steering gear increases and may lead to failure
Solution Approach 1:
The patent applies preliminary action by detecting rust-related friction increases at an early stage through continuous monitoring of steering parameters. The system calculates friction levels using multiple sensor inputs and compares them against threshold values, providing early warning before the rust causes catastrophic failure, thus allowing preventive maintenance to be performed
3Measurement precision
If multiple sensors and correlation calculations are implemented to detect friction, then rust detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent employs a control unit that serves multiple functions: it receives data from multiple sensors, performs correlation calculations to detect friction patterns, stores normal parameter ranges, and generates warning signals. This multi-functional approach consolidates what could be separate complex systems into a single integrated unit, improving detection accuracy while managing overall system complexity
Data Source
AI summary
The system (10) is configured to detect high friction in a steering gear used with a vehicle. The system (10) has a speed sensor (17), a steering angle sensor (17, 108), a plurality of vehicle sensors (23, 112) to monitor vehicle parameters and a plurality of steering system sensors (17, 108) to monitor steering system parameters. A repository stores (27, 120) the normal operating values for the vehicle and steering system sensors (17, 108). A correlation block (21, 130) compares the vehicle and steering system values with the values in the repository (27, 120). A trigger block (15) receives signals from the speed and steering angle sensors, and activating the correlation block (21, 130) when the speed and steering angle sensors are in a select range. The correlation block (21, 130) sends a warning signal if the values from the repository (27, 120) and the signal from the speed and steering angle sensors (17, 108) exceed a predetermined value.