Effective Slope Calculation for Green Route Fuel Consumption
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Solution Overview
Problem
Current navigation systems fail to accurately calculate routes that minimize fuel consumption due to reliance on average slope values, which do not effectively represent the impact of slope on fuel consumption, leading to complex and inaccurate calculations.
Innovation Solution
The use of effective slope values, calculated using a general fuel consumption formula and lookup tables, to simplify and improve the accuracy of green route calculations by representing the actual fuel consumption impact of road slopes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If average slope values are used for route calculation, then the calculation process is simplified, but the accuracy of fuel consumption estimation deteriorates
Solution Approach 1:
The patent transforms the complex actual slope profile into a simplified effective slope parameter that captures the essential fuel consumption impact. By changing the parameter representation from detailed slope profiles to a single effective slope value, the system achieves both calculation simplicity and estimation accuracy. The effective slope is calculated using a formula that integrates the actual slope profile's impact on fuel consumption, then used in lookup tables for efficient route evaluation.
2Measurement precision
If detailed actual slope profiles are used for fuel consumption calculation, then the accuracy of fuel consumption estimation is improved, but the calculation complexity increases
Solution Approach 1:
The patent extracts the essential fuel consumption impact from the detailed actual slope profile by calculating an effective slope value. This extraction process separates the critical information (fuel consumption impact) from the detailed profile data, allowing accurate estimation without processing the entire detailed profile. The effective slope captures the net effect of the slope profile on fuel consumption, enabling simplified calculations that maintain accuracy.
3Speed
If effective slope values are calculated and stored in lookup tables, then the calculation speed is improved, but the memory requirements increase
Solution Approach 1:
The patent stores effective slope values in lookup tables with predefined intervals rather than storing all possible slope values. By using partial action (storing only necessary discrete values), the system achieves fast calculation through table lookup without the memory burden of storing continuous or exhaustive slope data. The lookup tables contain effective slope values for common slope scenarios, providing sufficient accuracy for route calculation while keeping memory usage manageable.
Data Source
AI summary
A method and system for calculating a green route using an effective slope is disclosed. A route calculation application calculates one or more routes from an origin to a destination. For each of the routes, the route calculation application calculates an associated fuel consumption value. The fuel consumption value is based on effective slope for segments in the route. The effective slope is a value that is based on the impact slope has on the fuel consumption of a vehicle traveling on the segment.