Longitudinal Guidance Control for Smooth Vehicle Turn-Off Deceleration
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Solution Overview
Problem
Conventional driver assistance systems for automated longitudinal guidance of a motor vehicle lack information about the driver's intended route, leading to uncomfortable behavior when a turning-off operation is required.
Innovation Solution
A driver assistance system that detects turning-off possibilities and adjusts the vehicle's speed accordingly, taking into account the driver's intended route and road conditions, using predefined deceleration rates and road types to optimize comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driver assistance system maintains constant speed without route information, then the system operation is simple, but the driving comfort deteriorates when turning-off is required
Solution Approach 1:
The system performs preliminary actions by detecting turning-off possibilities in advance and determining appropriate deceleration points before the vehicle reaches them. The control unit calculates required deceleration distances and initiates speed reduction maneuvers beforehand, ensuring comfortable stopping at junctions and entrances without requiring complex real-time decision-making
2Ease of operation
If the system reduces speed frequently for turning-off possibilities, then the driving comfort improves, but the productivity deteriorates due to unnecessary decelerations
Solution Approach 1:
The system continuously receives feedback from navigation data about upcoming turning-off possibilities and adjusts speed accordingly. The control unit monitors the vehicle's position relative to detected junctions, entrances, and exits, and dynamically modifies deceleration commands to achieve smooth stopping exactly where needed, avoiding both premature and delayed braking
Solution Approach 2:
The system dynamically adapts its behavior based on real-time conditions by adjusting deceleration profiles according to the specific turning-off possibility detected. Different deceleration strategies are applied depending on the type of intersection, current speed, and distance to the turning point, optimizing both comfort and efficiency for each situation
3Ease of operation
If the system detects turning-off possibilities in advance, then the driving comfort improves, but the loss of time increases due to early speed reduction
Solution Approach 1:
The system optimizes the balance between early detection and time loss by dynamically adjusting detection ranges and deceleration timing parameters. The control unit calculates optimal deceleration start points based on current speed, vehicle dynamics, and the specific characteristics of upcoming intersections, ensuring speed reduction begins at the ideal moment to maintain comfort while minimizing time loss
Data Source
AI summary
A driver assistance system for automated longitudinal guidance of a motor vehicle configured to detect at least one turning opportunity for the motor vehicle, and to reduce the speed of the motor vehicle in accordance with the at least one detected turning opportunity.