Map-Based Braking for Tight Turn Wheel-Road Contact
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Solution Overview
Problem
Existing vehicle control systems face challenges in optimizing braking during turns, especially in situations where tight corners and minimal braking distance are involved, leading to suboptimal braking performance.
Innovation Solution
The implementation of map-based braking, which utilizes a processor to receive vehicle operation information, retrieve upcoming turn data from either in-vehicle navigation systems or map data, and determine if the vehicle will maintain contact with the road surface at the current speed, issuing a braking instruction accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If object detection-based braking systems are used, then braking response time is reduced, but braking performance in tight corners with minimal braking distance remains suboptimal
Solution Approach 1:
The system retrieves upcoming turn information from map data or navigation system in advance of the turn, allowing the control system to calculate required braking distance and issue braking instructions before the vehicle reaches the critical point, ensuring optimal braking performance in tight corners
Solution Approach 2:
The system introduces map data and navigation information as intermediary elements between the driver's intent and the braking action, using this intermediate information to determine upcoming turns and calculate appropriate braking strategies rather than relying solely on direct object detection
2Stability of the object's composition
If map-based braking is implemented, then trajectory maintenance during turns is improved, but system complexity increases due to integration with navigation systems
Solution Approach 1:
The system uses the existing navigation system's map data for multiple purposes: both for providing turn information to the braking control and potentially for other navigation functions, thereby reducing the need for separate dedicated sensing systems and lowering overall system complexity
Solution Approach 2:
The navigation system's existing map data structure is leveraged to provide turn information without requiring additional dedicated sensors or complex external data sources, allowing the braking system to utilize already-available information infrastructure
Data Source
AI summary
Vehicle control using map-based braking includes receiving, while a driver is operating the vehicle to traverse a vehicle transportation network, vehicle operation information including at least a current speed of the vehicle, retrieving, from a planned path of an in-vehicle navigation system, an upcoming turn in a current road when the driver is using the in-vehicle navigation system, and retrieving from map data, the upcoming turn in the current road when the driver is not using tin-vehicle navigation system. Thereafter, it is determined whether, during the upcoming turn, wheels of the vehicle will maintain contact with a road surface at the current speed. A braking instruction is issued to a control system of the vehicle responsive to whether the wheels of the vehicle will maintain contact with the road surface at the current speed.