1. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
Institut français
des sciences et technologies
des transports, de l’aménagement
et des réseaux
Ecodriving: a simple matter of
energy use?
O. Orfila, COSYS-LIVIC
2. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
A definition of ecodriving
Few energy reaches
the wheel and we are
spoiling it
Ecodriving is a
good way to use
our leftovers
3. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
Ecodriving definition proposal
• Ecodriving is a set of driving technics, dealing with all driving tasks,
aiming at minimizing the energy losses and/or emissions rate of the
driven vehicle, from an origin to a destination, without trading-off
safety nor total travel time.
• Note: Ecodriving is a multi objective optimization process.
4. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
Ecodriving effectivness
Wengraf I.: Easy on The Gas, The effeciteveness of ecodriving, RAC Foundation, London,
2012, pp.16-17
Experimental: 20 weeks
before and after ecodriving
course (with golden rules)
Isuzu Motors: Fuel
economy challenge: One
trip before, one trip after
5. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
Some of the ecodriving research
questions
• Can ecodriving famous golden rules, taken
one by one:
• Reduce the energy used by the concerned
vehicle?
• Reduce the emissions rates of the concerned
vehicle?
• Improve road safety for the concerned vehicle?
• Reduce congestions?
• Increase comfort?
• Reduce traffic noise?
• And what about a whole network?
6. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
Practical obstacle
• Driving constrained by traffic conditions
• Other drivers may dislike to have an ecodriver in
front of them
• No incitation to ecodrive:
• Human habits are difficult to change (Learning
aspects)
• Almost no benefit from car insurance compagnies
• Driving trainers are more concerned about safety
• Limited knowledge about ecodriving impact
7. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
IFSTTAR ecodriving research
methodology
• Ecodriving optimization• Ecodriving modelling
• Ecodriving assistance
systems
• Impact of ecodriving
Smart and Green ACC
ddriver
Tdriver
V
d
Vi
g
SAGA Mode
Target Speed
Target Acc.
ErrorFlag
Accuracy
Dyn. Limit
Func. Limit
70
Vdriver
eHorizon
Fuel use in congested urban
traffic
Fuel use in nearly congested
interurban roads
δ
ωmax2
Olivier Orfila, Guillaume Saint Pierre, Cindie Andrieu. (2012) « Gear Shifting Behavior
Model for Ecodriving Simulations Based on Experimental Data », EWGT2012
H. T. Luu, 2011, Développement de méthodes de réduction de la consommation
en carburant d’un véhicule dans un contexte de sécurité et de confort : un
compromis entre économie et écologie. Thèse de doctorat, Université d’Evry
Orfila O., Saint Pierre G., Messias M. (2014), « Development of an ecodriving
assistance application for nomadic devices performing real-time and post trip
coaching for road vehicles », TRA 2014, Paris, La Défense.
O. Orfila, 2011, Impact of the penetration rate of ecodriver on traffic and fuel
consumption, YR2011, Copenhaguen
8. Institut français des sciences et technologies des transports, de l’aménagement et des réseaux
www.ifsttar.fr
Thanks !!!
Ifsttar
14-20 Bld. Newton
Cité Descartes
Champs sur Marne
77447 Marne-la-Vallée Cedex 2
France
Tél. +33 (0)1 81 66 80 00
www.ifsttar.fr
communication@ifsttar.fr
