Electronic Steering Fault Range Display for Controlled Vehicle Operation
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Solution Overview
Problem
Electronic steering systems in vehicles face challenges in maintaining reliability and driver acceptance when a fault occurs, as previous methods often force unexpected speed reductions or limit vehicle operation without considering the specific driving situation, leading to unwanted driving situations.
Innovation Solution
An electronic steering system with redundant components that detects faults and adjusts the vehicle's range information based on the remaining operational range, considering factors like battery capacity, driving profile, and location, to inform the driver dynamically and continuously, allowing for controlled operation without sudden changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle operates with redundant steering system components after a fault, then the vehicle can continue to be operated, but the range is limited by the remaining operational capability of the non-faulty component
Solution Approach 1:
The system dynamically adjusts the displayed range information based on the fault status and remaining operational capability of steering system components. The control device continuously monitors the operational state and updates the range information to reflect the current safe operational limits, allowing the vehicle to operate within dynamically determined boundaries rather than fixed limitations.
Solution Approach 2:
The system changes the parameter of range information displayed to the driver based on the fault condition. When a fault is detected in one steering system component, the system calculates and displays a reduced range based on the remaining operational capability of the non-faulty component, thereby adapting the operational parameters to the current system state.
2Reliability
If the vehicle limits operation after a steering component fault, then safety is improved, but driver acceptance decreases due to unexpected speed reductions and operational limitations
Solution Approach 1:
The system provides continuous feedback to the driver through the output device about the adjusted range information based on the fault status. This transparent communication allows the driver to understand the operational limitations and plan accordingly, reducing surprise and frustration while maintaining safety through informed operation within the calculated range limits.
Solution Approach 2:
The system performs preliminary calculation and communication of the adjusted range to the driver before the vehicle reaches the operational limit. By informing the driver in advance of the reduced operational capability and the resulting range limitations, the driver can prepare and adjust driving behavior proactively rather than experiencing sudden unexpected restrictions.
3Reliability
If the system provides accurate range information based on steering component status, then operational safety is improved, but the complexity of the system increases due to fault detection and range calculation mechanisms
Solution Approach 1:
The control device performs multiple functions: it monitors the operational status of steering system components, detects faults, calculates the remaining operational range based on the non-faulty component's capability, and communicates this information to the driver. By consolidating these functions in a single control device, the system achieves the required safety and information accuracy without proportionally increasing overall system complexity.
Data Source
AI summary
The disclosure generally relates to a method for operating a vehicle with an electronic steering system and to an electronic steering system. A method for operating a vehicle with an electronic steering system includes detecting a fault in at least one of a first steering system component or a second steering system component, determining a first range of a vehicle based on the fault in the at least one of the first steering system component or the second steering system component, determining adjusted range information of the vehicle based on a comparison of the first range with a battery range of the vehicle, and substituting the battery range of the vehicle in an output device of the vehicle with the adjusted range information.