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

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

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 thedriven vehicle, from an origin to a destination, without trading-offsafety nor total travel time.

• Note: Ecodriving is a multi objective optimization process.

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 weeksbefore and after ecodrivingcourse (with golden rules)

Isuzu Motors: Fuel economy challenge: One trip before, one trip after

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 concernedvehicle?

• Improve road safety for the concerned vehicle?

• Reduce congestions?

• Increase comfort?

• Reduce traffic noise?

• And what about a whole network?

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

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.

Error Flag

Accuracy

Dyn. Limit

Func. Limit

70

Vdriver

eHorizon

Fuel use in congested urbantraffic

Fuel use in nearly congestedinterurban roads

δ

ωmax2

Olivier Orfila, Guillaume Saint Pierre, Cindie Andrieu. (2012) « Gear Shifting BehaviorModel 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

Institut français des sciences et technologies des transports, de l’aménagement et des réseaux

www.ifsttar.fr

Thanks !!!

Ifsttar

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Cité Descartes

Champs sur Marne

77447 Marne-la-Vallée Cedex 2

France

Tél. +33 (0)1 81 66 80 00

www.ifsttar.fr

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