Drive Train Component Fault State Transfer Control
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Solution Overview
Problem
Current drive train safety systems for motor vehicles face challenges in efficiently transferring components into a safe state during faults, often requiring costly additional hardware and complex software that can lead to unnecessary resets and reduced vehicle comfort due to fault tolerance limitations.
Innovation Solution
A method that differentiates between two types of fault states, allowing passive mechanical prestress for less severe faults and active actuation for more severe faults, thereby reducing the need for additional safety hardware and minimizing unnecessary resets, using a control device with safety software that can independently detect and manage fault states to ensure timely safe state transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional safety hardware is provided for fault detection and safe state transfer, then processing safety is improved, but device complexity and cost increase
Solution Approach 1:
The control device is designed to perform multiple functions: normal control operations and safety monitoring. The control device includes a fault detection mechanism that can identify both first type faults (affecting safe state transfer) and second type faults (not affecting safe state transfer), eliminating the need for separate dedicated safety hardware while maintaining high processing safety
Solution Approach 2:
The control device monitors its own operational status and autonomously detects fault states. By implementing self-diagnostic capabilities within the existing control device, the system achieves safety monitoring without requiring external safety hardware, thereby reducing device complexity and cost while maintaining reliability
2Reliability
If the control device is reset frequently to achieve safe state, then processing safety is improved, but vehicle comfort deteriorates due to unnecessary resets
Solution Approach 1:
The fault detection and response mechanism is tailored to the specific type of fault detected. First type faults (affecting safe state transfer) trigger immediate reset and safe state transfer, while second type faults (not affecting safe state transfer) allow the control device to continue operating without reset. This differentiated approach ensures safety while minimizing unnecessary disruptions to vehicle operation and comfort
3Reliability
If the component is actively actuated into safe state, then processing safety is improved, but use of energy increases compared to passive mechanical prestress
Solution Approach 1:
The system dynamically selects the appropriate safe state transfer method based on the detected fault type. For first type faults, the system uses passive mechanical prestress to transfer the component to safe state, conserving energy. For second type faults, active actuation is employed when necessary. This dynamic adaptation optimizes energy consumption while maintaining processing safety
Data Source
AI summary
A method for actuating a component of a drive train of a motor vehicle. The component is mechanically prestressed into a safe state. The method has the steps: sensing a fault state; sensing whether the fault state is a first or second type of fault state; immediate interruption of the actuation of the component so that the component is passively transferred into the safe state by the mechanical prestress if the fault state, is of the first type of fault state, or actuation of the component in such a way that the component is actively transferred into the safe state if the fault state is of the second type of fault state.