Longitudinal Driver Assistance Speed Adaptation Timing
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Solution Overview
Problem
Existing longitudinally guiding driver assistance systems lack an intuitive and effective method for automatically adapting the vehicle's speed to new maximum speeds based on upcoming events, often leading to confusing prompts for the driver, such as suddenly changing from 100 km/h to 50 km/h when entering a built-up area.
Innovation Solution
A driver assistance system that includes a detection system for identifying relevant events ahead and a function unit to determine the optimal time for adjusting the speed, which initiates prompt information for automatic adaptation of the permissible maximum speed, taking into account location-specific data, current vehicle modes, and deceleration/acceleration strategies, ensuring the vehicle adjusts to the new speed seamlessly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the system automatically adapts speed to new maximum speeds based on upcoming events, then the system's automation and responsiveness improve, but driver confusion increases due to sudden unexpected speed changes
Solution Approach 1:
The system performs preliminary actions by detecting upcoming events (such as speed limit changes) in advance and calculating the optimal prompt time before the event occurs. This allows the system to prepare the driver with timely information before automatic speed adaptation is executed, preventing sudden unexpected changes and improving driver understanding while maintaining automation.
2Ease of operation
If the system provides timely prompt information to drivers, then driver understanding and acceptance improve, but the system complexity increases due to additional detection and timing functions
Solution Approach 1:
The function unit serves multiple functions: it detects upcoming events, calculates optimal prompt timing, and controls speed adaptation. By consolidating these functions into a single multi-functional unit rather than separate dedicated components, the system provides timely driver information while minimizing the increase in overall system complexity.
3Measurement precision
If the system calculates optimal prompt time based on event location and vehicle parameters, then the timing accuracy improves, but the computational requirements and processing time increase
Solution Approach 1:
The system performs preliminary calculations of optimal prompt timing based on detected event parameters (location, type) and current vehicle state (speed, acceleration). By pre-calculating these timing parameters when events are detected rather than computing them in real-time during execution, the system achieves high timing accuracy while minimizing processing delays.
Data Source
AI summary
A longitudinally guiding driver assistance system in a motor vehicle includes a detection system for detecting currently applying events and relevant events lying ahead, which require an adaptation of the permissible maximum speed, and a function unit which, when detecting a relevant event, while taking into account the location of the relevant event lying ahead, determines a location-dependent point in time, whose reaching causes the function unit to initiate an output of prompt information for permitting an automatic adaptation of the currently permissible maximum speed to a new permissible maximum speed. The function unit is designed, in the case of an activation of the longitudinally guiding driver assistance system, while taking into account a detected currently applying event, to initiate a first output of prompt information for permitting an automatic first setting of the currently applying permissible maximum speed as the new permissible maximum speed.