Vehicle Energy Control Using Road-Type Load Correction
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Solution Overview
Problem
Existing vehicle control devices fail to accurately calculate energy consumption during electric traveling, as they do not consider variations in traveling scenes such as road type, vehicle speed, and energy efficiency modes.
Innovation Solution
A control device equipped with a processor that estimates travel load based on road type, vehicle speed, or energy efficiency modes to correct the basic energy consumption values, using different correction efficiencies for each scenario, thereby enhancing the accuracy of energy consumption calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a basic energy consumption value is used without correction, then the calculation is simple, but the accuracy of energy consumption calculation deteriorates due to not considering differences in traveling scenes
Solution Approach 1:
The patent applies parameter changes by introducing correction coefficients that modify the basic energy consumption value based on traveling scene parameters. The processor changes the energy consumption parameter by multiplying the basic value with a correction coefficient selected according to road type, vehicle speed, or energy efficiency mode, thereby improving accuracy while maintaining calculation simplicity.
Solution Approach 2:
The patent implements local quality by applying different correction coefficients for different traveling scenes. Instead of using a single uniform calculation method, the system selects specific correction coefficients based on local conditions such as road type (expressway vs. general road), vehicle speed ranges, or energy efficiency modes, making the calculation adapt to local traveling characteristics.
2Measurement precision
If multiple correction coefficients are used for different traveling scenes, then the accuracy of energy consumption calculation is improved, but the complexity of the control system increases
Solution Approach 1:
The system manages multiple correction coefficients by parameter changes - each correction coefficient corresponds to specific parameter ranges (road type, speed ranges, energy efficiency modes). The processor selects the appropriate coefficient based on current parameter values, improving accuracy without requiring complex control logic.
Solution Approach 2:
The patent applies segmentation by dividing the traveling scenes into distinct categories or segments. The correction coefficients are segmented according to road type (expressway/general road), vehicle speed ranges (multiple thresholds), or energy efficiency modes. This segmentation simplifies the control system by creating discrete, manageable categories rather than continuous complex calculations.
3Measurement precision
If correction coefficients based on road type, vehicle speed, or energy efficiency mode are applied, then the accuracy of energy consumption calculation is improved, but the computational load increases
Solution Approach 1:
The system uses parameter changes to improve accuracy while managing computational load. Instead of complex real-time calculations, the processor selects pre-determined correction coefficients based on parameter thresholds (road type categories, speed ranges, energy efficiency modes). This approach improves accuracy through parameter-based selection rather than computationally intensive calculations.
Solution Approach 2:
The patent applies partial action by selectively applying correction coefficients only when needed for specific traveling scenes. The system calculates the basic energy consumption value first, then applies correction only based on the selected parameter category. This partial correction approach improves accuracy for relevant scenes while avoiding unnecessary computational overhead for all possible scenarios.
Data Source
AI summary
A control device for a vehicle is configured to control the vehicle configured to perform an electric traveling using one or more electric motors driven by electric power from a battery. The control device includes a processor. The processor is configured to execute a calculation process of calculating an energy consumed by the electric traveling in a section from a first point to a second point of a planned travel route of the vehicle. In the calculation process, the processor is configured to: estimate whether or not a travel load of the section is high, based on road type of the section; and correct a basic value of the energy consumed, based on a correction efficient that differs depending on whether or not the travel load of the section is high.