Park-Steering Switch Logic Using Dual Velocity Thresholds
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Solution Overview
Problem
Conventional park-steering assistance systems require manual reactivation after exceeding a fixed velocity threshold, leading to inconvenience for drivers who briefly increase vehicle speed while searching for parking spaces.
Innovation Solution
Introduction of a second, lower velocity threshold value for temporarily deactivating and reactivating the system, along with additional threshold values to manage display and functionality, creating a hysteresis effect to prevent 'fluttering' and ensure optimal functioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed first velocity threshold value (e.g., 30 km/h) is used to deactivate the park-steering assistance system, then measurement accuracy is maintained, but driver convenience deteriorates when brief velocity increases occur during parking search
Solution Approach 1:
The velocity threshold is segmented into two distinct levels: a first velocity threshold value (e.g., 30 km/h) for complete deactivation and a second, lower velocity threshold value for temporary deactivation. This segmentation allows the system to differentiate between brief velocity excursions and sustained high-velocity operation, maintaining measurement accuracy while improving driver convenience during temporary speed increases.
Solution Approach 2:
The system dynamically adjusts its operational state based on velocity conditions. When the vehicle velocity exceeds the second threshold but remains below the first threshold, the system transitions to a temporarily deactivated state rather than full deactivation. This dynamic response allows the system to adapt to transient velocity changes while preserving the ability to reactivate automatically, thereby improving ease of operation without compromising measurement precision.
2Reliability
If the park-steering assistance system is deactivated when velocity exceeds the first threshold, then system reliability is maintained, but loss of time occurs when manual reactivation is required
Solution Approach 1:
The system performs a preliminary deactivation at the second velocity threshold rather than immediate full deactivation at the first threshold. This preliminary action prepares the system for potential automatic reactivation, reducing the time loss associated with manual reactivation. The system maintains a ready state that can quickly transition back to active operation when velocity conditions permit, thereby reducing the operational interruption time.
Solution Approach 2:
The system continuously monitors vehicle velocity and provides feedback to the control unit. When velocity drops below the first threshold after temporary deactivation, the system automatically reactivates through feedback-driven control. This feedback mechanism eliminates the need for manual reactivation in many cases, significantly reducing time loss while maintaining system reliability through continuous velocity-based monitoring.
3Ease of operation
If multiple velocity threshold values are introduced for temporary deactivation, then driver convenience is improved, but device complexity increases
Solution Approach 1:
The system changes the velocity parameter thresholds to create distinct operational zones. By defining a second velocity threshold value lower than the first threshold value, the system creates a intermediate zone for temporary deactivation. This parameter change approach improves driver convenience through more nuanced velocity-based control while keeping the complexity manageable by using clear, discrete threshold values rather than continuous adjustments.
Data Source
AI summary
A park-steering assistance system and method for operating a park-steering assistance system includes a switch-on and switch-off logic, which is provided to activate the park-steering assistance system as a function of a signal of a control element and to deactivate the park-steering assistance system as a function of a velocity value of the motor vehicle and as a function of a specified first velocity threshold value, a specified second velocity threshold value existing, which is lower than the first velocity threshold value, and the switch-on and switch-off logic being arranged to switch the park-steering assistance system from the activated state to a temporarily deactivated state or from the temporarily deactivated state to the activated state as a function of a comparison of the variables of the velocity value and the second velocity threshold value.