Thursday9March17

LCVSpecificdynamicboundaryconditionsforweaklymotorizedvehicles

Note:“weaklymotorized”heremeansvehicleswitharesultinglowpower-weightratio,notunder-poweredvehicles

TNO95%

urban 15,5

rural 16,8

motorway 15,5

v×apos[m²/s³] meanv[km/h]

urban 17,3 27,4

rural 20,8 74,3

motorway 17,8 105,3

0

5

10

15

20

25

30

0 20 40 60 80 100 120 140

95percentilev×apos

meanv[km/h]

current "PC" limit

95%

urban

rural

motorway

TNO urban

TNO Rural

TNO motorway

JUSTIFICATIONOFSPECIFICBOUNDARYCONDITIONSFORWEAKLYMOTORIZEDVEHICLES

•  Weaklymotorizedvehiclesexhibitlimiteddrivingdynamics,henceaggressivedrivingdoesnotmanifestitselfthroughlargevaluesofv×apos

•  Findingsfrom70tripssampledbyTUGrazand20tripsofTNO’sproposal“DrivingboundaryforN1(16June2016inBrussels)”:

Currentv×aposlimitscomparedtoLCVtrips

0,075×vk+15,26 -0,097×vk+28,04

rural

JUSTIFICATIONOFSPECIFICBOUNDARYCONDITIONSFORWEAKLYMOTORIZEDVEHICLES

0

5

10

15

20

25

0 20 40 60 80 100 120

95percentilev×apos

meanv[km/h]

v×aposlimitcurvesforweaklymotorizedvehicles

current "PC" limit

95%

urban

rural

motorway

TNO urban

TNO Rural

TNO motorway

15,5

16,8

15,5

v×apos[m²/s³]

meanv[km/h]

17,3 27,4

20,8 74,3

17,8 105,3

Assumption:TNOmeanv[km/h]sameasthemeanvofTUGraz‘sdataforallofTNO‘stripdatapoints

0,075×vk+15,26 -0,097×vk+28,04

rural

Availabilityofdata:70tripssampledbyTUGraz20tripsofTNO’sproposal

PROPOSALSTRUCTUREOFAMENDEDV×APOSLIMITCURVESFORWEAKLYMOTORIZEDVEHICLES

Tripinvalid

Yes

Yes

No

Tripvalidintermsofthedynamicevaluation

StartRDEtripevaluation

PMRTM≤44W/kg

The95Percentile(v×apos)valueperspeedbinis

<amendedlimitsforLCVs

The95Percentile(v×apos)valueperspeedbinis

<currentlimits

Yes

Tripinvalid

No No

DeterminationofPMRTMàRDEPowertomassratio:Ratedenginepowerdividedbythevehicle‘sactualtestmass(TM)

JUSTIFICATIONOFSPECIFICBOUNDARYCONDITIONSFORWEAKLYMOTORIZEDVEHICLES

•  ForthepurposeofRDE,avehicleshouldbeconsideredasweeklymotorized,ifPMRTM≤44W/kg.

TheWLTCclass2PMRlimitof34W/kgisinapplicablefortheRDEevaluation,astheRDEPMRTMismeasuredusingtheactualtestmassandnotthecurbmassofthevehicle.

•  TheTNOinvestigationincludesvehicleswithPMRsfrom22W/kgupto44W/kg

PMRTMdistinction-commonlyandweaklymotorizedvehicles

PMRof44W/kg

Typical PMR distribution in a vehicle fleet

JUSTIFICATIONOFSPECIFICBOUNDARYCONDITIONSFORWEAKLYMOTORIZEDVEHICLES

Reg.(EC)No692/2008,ANNEXIIIA,Appendix7ashouldbeamendedasfollows:Toparagraph4thefollowingpointshouldbeadded:

“Distinctionbetweencommonlyandweaklymotorizedvehicles

TheachievabledrivingdynamicsinaRDEtriparebasedonthepower-to-massratio(PMRTM)ofavehicle.TheRDEPMRTMisdefinedbytheratedenginepowerdividedbythevehicle‘sactualRDEtestmass(TM).

•  TodeterminetheoverallexcessofdrivingdynamicsduringtheRDEtripforvehicleswhichhaveaPMRTM≤44W/kg,theverificationofv×apos_[95]describedin4.xshallbeused.

•  TodeterminetheoverallexcessofdrivingdynamicsduringtheRDEtripforvehicleswhichhaveaPMRTM>44W/kg,theverificationofv×apos_[95]describedin4.yshallbeused.”

JUSTIFICATIONOFSPECIFICBOUNDARYCONDITIONSFORWEAKLYMOTORIZEDVEHICLES

Reg.(EC)No692/2008,ANNEXIIIA,Appendix7ashouldbeamendedasfollows:Toparagraph4thefollowingpoint(4.x)shouldbeadded:4.x Verificationofv×apos_[95]perspeedbin(withvin[km/h])for

vehicleswithaPMRTM≤44W/kg

•  If<74,6km/hand(v×apos)k_[95]>(0,075×vk+15,26)*isfulfilled,thetripisinvalid.

•  If>74,6km/hand(v×apos)k_[95]>(-0,097×vk+28,04)*isfulfilled,thetripisinvalid.

*ThelimitcurvesarebasedonthetripssampledbyTUGraz