Distance to Empty Update via Partial Recalculation
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Solution Overview
Problem
Eco-friendly vehicles, such as electric and hydrogen fuel cell vehicles, face challenges in updating the distance to empty (DTE) on navigation maps in real time due to high computation requirements, leading to delays and reduced marketability of navigation systems.
Innovation Solution
A method and system that calculate the DTE based on all preset status information of a vehicle, with subsequent updates reflecting only changed status information, reducing computation time by recalculating only the affected areas and transmitting results from a remote server to the vehicle's audio video navigation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the DTE is recalculated based on all status information whenever the vehicle position or remaining energy changes, then the accuracy of the DTE is improved, but the computation time increases and real-time updating is not achieved
Solution Approach 1:
The patent segments the status information into multiple parameters (vehicle position, remaining energy, driving conditions, etc.) and identifies which specific parameters have changed. Instead of recalculating DTE based on all status information, the system only recalculates by considering the changed parameters, thereby reducing computation time while maintaining accuracy.
Solution Approach 2:
The patent applies partial action by performing recalculation only to the extent necessary - i.e., only when and only to the degree that status information has changed. The system determines the degree of change in status information and performs partial recalculation accordingly, avoiding unnecessary full recalculations and achieving real-time updating.
2Speed
If the DTE is updated frequently to reflect real-time changes, then the real-time display is improved, but the computation load increases and may cause system performance degradation
Solution Approach 1:
The patent implements periodic action by updating the DTE at specific intervals triggered by changes in status information rather than continuously. The system periodically checks for changes in vehicle position, remaining energy, and other status parameters, and only performs recalculation when changes are detected, thereby maintaining real-time display capability while reducing overall computation load.
Solution Approach 2:
The system performs partial recalculation based on the degree of change in status information. When changes are minor or localized, only partial recalculation is performed rather than a complete recalculation of all parameters, reducing computation load while maintaining update speed and real-time display performance.
Data Source
AI summary
Disclosed herein are a method and a system for displaying a distance to empty (traveling range) of a vehicle, capable of updating the distance to empty more quickly by reducing an amount of computation for calculating the distance to empty (traveling range) of the vehicle. The method includes calculating a distance to empty reachable with current energy of a vehicle based on status information of the vehicle and displaying the calculated distance to empty on a display; and recalculating a distance to empty by reflecting only changed pieces of the status information of the vehicle to update the distance to empty, and replacing the distance to empty displayed on the display with the updated distance to empty.