 Features / Functions
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 Evaluation Formula of Carbon Footprint * 1
In general, a vehicle's carbon dioxide emission or carbon footprint (E)
is in proportion to its fuel consumption. Therefore to be able to calculate
it we require key factors such as "travelling time T" and "travel
distance D" as well as the variation in speed "Fluctuating vehicle
speed".
The Eco-Drive plug-in calculates fuel consumption and carbon footprint
using a formula (1) based on results obtained from the UC-win/Road driving
log.
E: Amount of CO2 discharged during travel time (kg-C)
T: Travel time (sec)
D: Travel distance (m)
K: The number of the speed measurement point
δk: When a speed is higher than at the previous point; 1 , Other case;
0
vk: Running speed at "K" point (m/sec)
Kc: Emission factor CO2 0.00231 kg-C/petrol (cc) (Ministry of Environment,
1999)
*1 T.Oguchi, M.Ktakura and M.Taniguchi" Carbon Dioxide emission model
in actual urban road vehicular traffic conditions", Journal of Infrastructure
Planning and Management (JSCE), No.695/IV-54, pp.125-136
Major strength
- During driving, speedmeter, accelerator and brake condition, and fuel consumption
are on screen real time and helps environmentally friendly driving.
- Outputs driving log simultaneously and displays Eco-Drive Analysis Viewer.
- Eco-Drive Analysis Viewer shows the figure of T: Travel time, D: Travel
distance, Q: fuel consumption and E: carbon footprint. Also makes graphs
of acceleration, speed, fuel consumption per hour, cumulative fuel consumption,
carbon footprint per hour, cumulative carbon footprint.
- Users can change each parameter in the evaluation formula of carbon footprint
as well.
- You can output the result as CSV file and use the result.
- Besides Eco-Drive Analysis Viewer, it has a function of showing "Eco-Driving
Ranking". It makes ranking based on
fuel consumption and carbon footprint and displays the result.
(In this case, the items shown are different from Eco-Drive Analysis Viewer
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The screen of "Calculation carbon footprint |
 The screen of Eco-Drive plug-in |
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"Eco-Drive" Ranking |
Validation Example
A simple experiment was conducted to calculate the carbon footprint generated
under the two different driving conditions of sudden starting and stopping
and one of driving more ‘gently'. A ‘virtual' car was driven through
one of Forum 8's 3D City Models using the UC-win/Road 3D Virtual Reality
software system with the Eco-Drive plug-in. The conditions were as follows;
(1) Drive a course of distance 1km, (2) Must stop at an intersection, (3)
No speed limit, (4) Try several different type of driving from gentle to
rough.
The following results were obtained:
| Case Name |
Travel Distance(km) |
Fuel Consumption(L) |
Carbon Footprint(kg-C) |
Driving Condition |
TEST-1
|
1.018 |
0.180 |
0.415 |
Hard driving with
sudden starts and sudden stops |
TEST-3
|
1.018 |
0.147 |
0.339 |
TEST-4
|
1.025 |
0.102 |
0.237 |
Driving seldom with sudden stars and sudden stops |
| TEST-5 |
1.02 |
0.098 |
0.226 |
Conclusion :
Driving hard with sudden stops and starts results in an increase in both
fuel consumption and carbon footprint. On the other hand, when driving
more gently, the results of both fuel consumption and carbon footprint
tend to decrease. |
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Related Information 
Experience driving simulation for an ecological drive check ('09.08.06)