Vehicle DTE Display Using Low-High Range Estimation
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Solution Overview
Problem
Existing technologies for estimating the distance to empty (DTE) in electric vehicles face challenges in accuracy due to uncertainties in future driving conditions and over/under-representation of energy-consuming events, leading to varying predictions of minimum and maximum DTE.
Innovation Solution
An apparatus and method that display not only the current real-time DTE but also low and high DTE values, calculated based on current driving conditions and battery energy, irrespective of learning, to induce economical driving habits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a DTE is determined using past energy efficiency to resolve uncertainty in predicted future driving information, then reliability of DTE prediction is improved, but if future traffic conditions differ from past travel information, measurement precision of DTE deteriorates due to large error in energy efficiency calculation
Solution Approach 1:
The system dynamically adjusts the DTE calculation method based on driving condition similarity. When current conditions match historical patterns, it uses learned energy efficiency for reliable predictions. When conditions differ significantly, it switches to real-time measurement-based calculation to maintain precision, making the system adaptive to changing traffic conditions.
Solution Approach 2:
The system changes the calculation parameters based on condition matching results. It transitions between using historical energy efficiency parameters (when conditions match) and real-time energy consumption parameters (when conditions differ), optimizing both reliability and precision through parameter selection based on current context.
2Measurement precision
If a DTE is updated whenever an energy-consuming event occurs, then measurement precision is improved, but device complexity increases due to continuous event monitoring and updating
Solution Approach 1:
Instead of updating DTE for every single energy-consuming event, the system performs partial updates based on significant condition changes or at optimized intervals. This reduces the excessive computational burden while maintaining sufficient precision for practical use.
Solution Approach 2:
The system automatically determines when updates are necessary based on predefined thresholds and conditions, eliminating the need for complex continuous monitoring. It self-regulates the update frequency to balance precision requirements with system complexity constraints.
3Adaptability or versatility
If minimum DTE and maximum DTE are calculated based on learning recent driving conditions, then adaptability is improved, but in states where future driving conditions cannot be predicted, manufacturing precision of DTE prediction deteriorates due to large variations in MIN and MAX DTE
Solution Approach 1:
The system dynamically adjusts between adaptive learning-based predictions and conservative estimation ranges based on predictability of future conditions. When conditions are unpredictable, it provides wider but more reliable estimation ranges rather than precise but unreliable point predictions.
Data Source
AI summary
An apparatus provides information on a distance to empty (DTE) of a vehicle and an information providing method is performed thereby. The apparatus includes a display device configured to display DTE information of a vehicle and a controller configured to control operation of the display device. The controller determines low fuel efficiency-related information and high fuel efficiency-related information based on a current vehicle driving condition. The controller determines a low DTE value and a high DTE value based on the low fuel efficiency-related information, the high fuel efficiency-related information, and a current available battery energy. The controller also determines a current DTE value indicating a real-time DTE and controls operation of the display device to display the low DTE value, the high DTE value, and the current DTE value.