Fuel Cell Distance-to-Empty Calculation Excluding Stop Consumption
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Solution Overview
Problem
Conventional technologies are inadequate for accurately calculating the distance to empty in fuel cell vehicles due to differences in energy sources compared to electric vehicles.
Innovation Solution
A distance-to-empty presentation apparatus for fuel cell vehicles, which includes units for acquiring traveling speed, distance, fuel residual amount, and fuel consumption, calculates fuel efficiency during the fuel filling period and uses this to determine the distance to empty, excluding fuel consumption during vehicle stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional distance-to-empty calculation methods are used for fuel cell vehicles, then the calculation can be performed using energy consumption data, but the result is inaccurate because it includes fuel consumption during vehicle stops which is not necessary for traveling
Solution Approach 1:
The patent segments the fuel filling period into multiple time units and further divides each time unit into traveling periods and stop periods. By separating these periods, the system can calculate fuel efficiency based only on traveling periods, excluding stop period consumption from the distance-to-empty calculation.
Solution Approach 2:
The patent extracts and excludes the fuel consumption amount during stop periods from the calculation. The distance-to-empty calculation unit specifically uses fuel consumption amounts from traveling periods only, taking out the irrelevant stop period consumption to improve calculation accuracy.
2Productivity
If fuel consumption amount during all periods is used for calculation, then the calculation is simpler, but it includes unnecessary fuel consumption at vehicle stops leading to inaccurate distance to empty
Solution Approach 1:
The patent dynamically adjusts the calculation by identifying and separating traveling periods from stop periods based on real-time vehicle state. The system adaptively selects which fuel consumption amounts to include or exclude based on whether the vehicle is moving or stopped, making the calculation both efficient and accurate.
Solution Approach 2:
The system uses feedback from the vehicle state (traveling or stopped) to adjust the fuel efficiency calculation. By continuously monitoring vehicle operation status and feeding this information back into the calculation process, the system ensures only relevant fuel consumption data is used.
Data Source
AI summary
A distance-to-empty presentation apparatus of a fuel cell vehicle includes: a traveling speed acquisition unit configured to acquire a traveling speed of the fuel cell vehicle; a traveling distance acquisition unit configured to acquire a traveling distance of the fuel cell vehicle in a fuel filling period, the fuel filling period is a period from the time when the fuel is filled in the fuel cell vehicle previously to the time when the fuel is filled in the fuel cell vehicle this time; a fuel residual amount acquisition unit configured to acquire a fuel residual amount of the fuel cell vehicle; a fuel consumption amount acquisition unit configured to acquire a fuel consumption amount of the fuel cell vehicle; a fuel efficiency calculation unit configured to calculate fuel filling period fuel efficiency by using the traveling distance in the fuel filling period and a traveling period fuel consumption amount that is the fuel consumption amount during traveling preparation and during traveling in the fuel filling period, wherein the fuel filling period fuel efficiency is fuel efficiency in the fuel filling period; a distance-to-empty calculation unit configured to calculate a distance to empty of the fuel cell vehicle by using the fuel filling period fuel efficiency and the fuel residual amount; and a presentation device configured to present the distance to empty.