Verfication of road test normality Parameter Analysis TF Normalisation

Transcription

1 Verfication of road test normality Parameter Analysis TF Normalisation

2 Indicators to be analysed with existing PEMS trips and other driving data Following parameters are yet identified for the analysis: Velocity (v) Positive acceleration (a pos ) Percent idling time on total time Number of idling events above 90 seconds duration v * a pos RPA D P 3s Road gradient Positive altitude change per km GSI-follow rate ( section 6.2.3) In the analysis each parameter shall be calculated l per total t trip and also for urban, road and motorway part of each trip. Road categories are per default <60km/h, km/h and >90 km/h. If map based allocation is available, this is preferred. For all parameters following values shall be calculated for the trip segments listed in a) if not a different unit is defined below: average 50% percentile 95% percentile

3 Acceleration / Dynamics: P95%(v*a pos ) ACEA-analysis : Indicator: P95% (v*a pos ) Calculation-rules: smoothing v-signal by using T4253H-Algorithm a pos > 0,1m/s² a=dv/2s, dv= (v i+1 -v i-1 ) Analysis of following trips and other data: WLTC and WLTC-Database TUG Trips JRC Trips ACEA-Round-Robin-Trips HBEFA database Version 1 categorisation urban/rural/motorway: by map

4 Acceleration / Dynamics: P95%(v*a pos ) Analysis of WLTC and WLTC-Database P95%(v*a pos ) of WLTP-Database in speed-classes P95%(v*a pos) ) of WLTC Increasing values for P95%(v*a pos ) for higher average speed Source: WLTP-Database

5 Acceleration / Dynamics: P95%(v*a pos ) Analysis of TUG Trips 2 vehicles 3 (subjective) driving styles (soft, normal, aggressive) 2 Routes (Alter, Ries) Vehicle A Vehicle B Vehicle A Vehicle B P95% P95% Source: IVT, TU-Graz

6 Acceleration / Dynamics: P95%(v*a pos ) Analysis of JRC Trips * 5vehicles 3 (subjective) driving styles (soft, normal, aggressive) 5 Routes (Arona, Luxembourg-Delphi, Milano, Romagnano, Sacromonte) V001 V002 V003 V004 V005 V002 P95% P95% V001 V003 V004 V005 *Problem: partially poor quality of gps-data Source: JRC

7 Acceleration / Dynamics: P95%(v*a pos ) Analysis of HBEFA-Cycles Analysis of passenger-car cycles 2 areas: urban and rural 4 levels of service (traffic situation): stop and go freeflow Access Distributor Trunk-National MW-National HBEFA - Urban HBEFA - Rural 50 Local Access Local Local-sin. 45 Trunk-City P95% Distributor Distr-sin. Trunk P95% MW-City 40 MW Stop+Go Stop+Go 35 )_95% (v*a pos ) )_95% (v*a pos ) v_mean v_mean Source: HBEFA/IVT,TU-Graz

8 Acceleration / Dynamics: P95%(v*a pos ) Analysis of ACEA-Round-Robin-Test 3 vehicles 2 (subjective) driving styles (normal, aggressive) 4 Routes (Wolfsburg, Neckarsulm, Steyr, Stuttgart) P95%(v*a pos ) of WLTP-Database in speed-classes

9 Road grade Database: EU28 road grade distribution weighted by mileage per country ACEA-analysis: Cumulative share of distance driven 100% 80% EU28 road grade distribution e.g.total trip Determine Calculation-rules for grade evaluation depending on the source used (GPS, ) 1.) Smoothing z-signal by using [ ]-Algorithm 2)categorisation 2.) urban/rural/motorway: by map 3.). 60% Area of valid tests 40% Road test grade normality can be sufficiently characterised by 4 points 20% 1.) 25% percentile of distance < [ ] % 1 2.) 75% percentile of distance < [ ] % 1 0% 2.) 95% percentile of distance <[ [ ]% ) max. road grade < [ ]% Road grade [%] 1 ) Alternative method : cumulated altitude difference Source: Daimler, Navtech, Hucho-Aerodynamik des Automobils

10 Shifting (for manual gearbox) General requirements Unusual gear shifting should be excluded. [evaluation to elaborated based on GSI & WLTP?] ACEA-analysis: 0,8 2 types of experiments A) Follow GSI 0,6 B) Ignore GSI Cumulative share of time driven 1,2 Follow GSI (n=13) Ignore GSI (n=4) 1 0,4 Area of valid tests Determine Calculation-rules for Shifting evaluation 1.) compare actual with desired d gear 2.) exclude idling, pushed clutch 3.) analog description for automatic vehicles Road test shifting normality can be sufficiently characterised by 1 value 1.) follow rate [ ]% 0, GSI follow rate [%] Source: BMW

11 Appendix

12 Appendix - Acceleration / Dynamics Analysis of HBEFA-Cycles Analysis of passenger-car cycles 2 areas: urban and rural 4 levels of service (traffic situation): stop and go freeflow Speed Limit [km/h] area road type >130 Motorway-Nat. X X X X X X X TrunkRoad / Primary-Nat. X X X X X X Distributor / Secondary X X X X X X Rural Distributor / Secondary (sinuous) X X X X X X Local / Collector X X X X Local l/c Collector (sinuous) X X X X Access-residential X X X Motorway-Nat. X X X X X X Motorway-City X X X X X X TrunkRoad / Primary-City X X X X X Urban TrunkRoad / Primary-Nat. X X X X X Distributor / Secondary X X X X Local / Collector X X Access-residential X X X x 4 Levels of service (LOS): freeflow / heavy / saturated / stop&go Source: IVT, TU-Graz