Coasting Destination Detection for Complete Vehicle Stop
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Solution Overview
Problem
Conventional driver assistance systems can only assist with coasting processes up to low speeds and do not reliably determine coasting destinations where the vehicle needs to stop, limiting their application spectrum.
Innovation Solution
The system determines a stopping position as the coasting destination and develops an action plan to decelerate the vehicle to a stop, using vehicle-to-infrastructure communication, digital map data, and sensor information to select measures from free-run and coasting operating modes, and suppresses crawl control activation below a threshold speed, with optional holding and takeover indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional driver assistance systems assist with coasting processes only up to low speeds, then the system complexity is reduced, but the application spectrum is limited
Solution Approach 1:
The driver assistance system is designed to perform multiple functions: it can assist with coasting processes at various speeds, determine different types of coasting destinations (including stopping positions), and provide multiple operating modes (free-run and coasting modes). This multi-functionality expands the application spectrum without proportionally increasing system complexity, as the system uses a unified control architecture that adapts to different operating conditions.
Solution Approach 2:
The system dynamically adapts its behavior based on current operating conditions. It can switch between free-run operating mode and coasting operating mode depending on the situation, and it determines coasting destinations dynamically using real-time data from digital maps, sensor information, and vehicle-to-infrastructure communication. This dynamic adaptation allows the system to handle a broader range of scenarios without requiring separate dedicated systems for each function.
2Adaptability or versatility
If the system determines stopping positions as coasting destinations, then deceleration to stop is enabled, but reliance on other assistance systems is reduced
Solution Approach 1:
The driver assistance system performs the function of determining stopping positions and managing deceleration to stop independently, without requiring other assistance systems such as radar-based systems. It uses its own integrated sensors, digital map data, and vehicle-to-infrastructure communication capabilities to identify stopping positions and execute the deceleration maneuver, thereby reducing reliance on external systems and enhancing system self-sufficiency.
Solution Approach 2:
The system uses digital map data and vehicle-to-infrastructure communication as intermediary information sources to determine stopping positions. These intermediaries provide advance information about upcoming stops, intersections, and traffic conditions, allowing the system to plan and execute deceleration to stop without needing real-time data from other assistance systems, thus reducing dependency while maintaining reliability.
3Ease of operation
If the system provides coasting assistance to complete stop, then comfort is enhanced, but the system must operate across a wider speed range
Solution Approach 1:
The coasting assistance function is segmented into different operating modes: free-run operating mode for higher speeds and coasting operating mode for lower speeds approaching the stop. This segmentation allows the system to optimize performance for each speed range while maintaining overall comfort. The system transitions smoothly between modes, providing continuous and comfortable deceleration to stop without requiring a single complex mode to handle the entire speed range.
Solution Approach 2:
The system changes operating parameters dynamically as speed decreases. It transitions from free-run mode to coasting mode at appropriate speed thresholds, and adjusts the deceleration profile to maintain comfort across the speed range. By adapting parameters such as clutch engagement timing, brake application rates, and gear selection based on current speed, the system provides comfortable coasting assistance to complete stop without being constrained by a fixed operating mode.
Data Source
AI summary
Method for operating a driver assistance system in a motor vehicle wherein an action plan comprising at least one measure for the targeted deceleration of the motor vehicle is determined, as well as predictive route data describing the distance to the coasting destination is determined when the driver ends the activation of the gas pedal and at least one potential coasting destination, which requires deceleration of the motor vehicle, is determined, and said measure is used for the longitudinal guidance of the motor vehicle, whereby the measures are selected from the measure group of at least one operation in a free-run operating mode and one operation in a coasting operating mode, whereby a stopping position is determined as the coasting destination and the action plan is determined for the deceleration of the motor vehicle to a complete stop at the stopping position.