Adaptive Cruise Control Speed Adjustment via Route Data Validation
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Solution Overview
Problem
Existing motor vehicle speed adjustment systems fail to account for various influencing factors such as road width, visibility, and potential risks, and require inconvenient reference runs to update route information when new navigation data is issued.
Innovation Solution
A method where the navigation device is supplied with changed route information, and the cruise control system adjusts the vehicle's speed based on evaluation parameters from earlier traversals, allowing for dynamic adjustment between stored and changed target speeds, incorporating factors like lateral acceleration, yaw rate, and average speeds from other vehicles, with user input and weighting for data reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the cruise control system adjusts speed based solely on stored route information, then the system operation is simple, but the speed adjustment accuracy deteriorates because certain influencing factors such as road width, visibility, and construction risks cannot be detected
Solution Approach 1:
The system performs preliminary actions by collecting evaluation parameters from multiple vehicles during their traversals of route sections before using this data for speed adjustments. This advance data collection allows the system to account for influencing factors like road width, visibility, and construction risks without increasing the complexity of the cruise control operation itself
Solution Approach 2:
The system introduces an intermediary mechanism by using evaluation parameters collected from multiple vehicles as mediators between the route information and the cruise control system. These evaluation parameters convey information about road conditions, visibility, and risks without requiring the cruise control system to directly detect these factors, thus maintaining operational simplicity while improving accuracy
2Reliability
If changed route information is validated through reference runs, then the reliability of route information is improved, but the time consumption and convenience deteriorate
Solution Approach 1:
The system merges the validation process with normal driving activities by collecting evaluation parameters from multiple vehicles during their regular traversals of route sections. This combines the validation function with ordinary driving operations, eliminating the need for separate reference runs and reducing time loss while maintaining route information reliability
Solution Approach 2:
The system enables self-service validation by allowing multiple vehicles to automatically contribute their traversal data for validating changed route information. The validation process serves itself through the collective data from ongoing vehicle operations, eliminating the need for manual reference runs and reducing time consumption
3Measurement precision
If evaluation parameters from multiple vehicles are collected and processed, then the speed adjustment accuracy is improved, but the device complexity increases
Solution Approach 1:
The system applies universality by using a multi-functional data processing approach where the same evaluation parameters collected from multiple vehicles serve multiple purposes: validating changed route information, determining target speeds for different vehicles, and adapting to various driving styles. This universal data structure reduces overall system complexity despite handling multiple vehicles' data
Data Source
AI summary
Method for operating a motor vehicle (1), comprising a navigation device (2) having at least one stored item of route information describing a route section and a cruise control system (3) that adjusts an actual speed of the motor vehicle (1) to a stored target speed determined as a function of the stored item of route information by controlling a drive (5) or a braking device (6) of the motor vehicle (1), wherein the navigation device (2) is supplied with at least one changed item of route information relating to the changed route section, and the cruise control system (3) adjusts the actual speed of the motor vehicle (1) as a function of at least one evaluation parameter, on the basis of which a traversal of the changed route section (15) earlier in time is qualified, either to the stored target speed determined as a function of the stored item of route information or to a changed target speed determined as a function of the changed item of route information.