RDE Regulation WGAE 10 05 2011 RDE Regulation

RDE Regulation WG-AE 10. 05. 2011 RDE Regulation Page 1 Random Cycle, Cycle Generation Random selection out of the short trip pools (urban, rural, highway) Random Combination of short trips in between each category Raw curve �modification needed to ensure driveability

RDE Regulation WG-AE 10. 05. 2011 RDE Regulation Page 2 Random Cycle, Cycle Generation Step 1: the speed at the beginning and at the end of each short trip is set to zero to ensure driveabilty.

RDE Regulation WG-AE 10. 05. 2011 RDE Regulation Page 3 Random Cycle, Cycle Generation Step 2: no stops between the highway short trips. Constant speed phases > 80 km/h are inserted to combine the short trips.

RDE Regulation WG-AE 10. 05. 2011 RDE Regulation Page 4 Random Cycle, Cycle Generation Step 3: stop phases between the short trips of each 8 sec. are inserted to ensure the driveability.

RDE Regulation WG-AE 10. 05. 2011 RDE Regulation Page 5 Random Cycle, Cycle Generation Beschleunigungsreserve 116 d Limitation Curve – 116 d MTMT 8 1 2 3 Beschleunigungsreserve [m/s²] 7 6 2 4 3 5 4 6 Vehicle specific limitation curve 5 FZG Grenzkurve 6 FZG Grenzkurve + Reserve Limitation curve used for the preselection of short trips (curve includes a reserve for driveability) 5 1 4 3 Curve covering all short trips 2 1 0 0 25 50 75 100 125 Geschwindigkeit [km/h] 150 175 200

RDE Regulation WG-AE 10. 05. 2011 Page 6 • Random Cycle • Cycle Generation

RDE Regulation WG-AE 10. 05. 2011 Page 7 RDE Regulation Boundary Conditions Random Cycle, Boundary Conditions Rationale Vehicle specific limitation curve (acceleration in dependence of speed) Ensure driveability in dependence of vehicle parameters (weight, engine power) Minimum cycle length Measurement accuracy Maximum cycle duration Reduction of dyno workload Definition of urban rural and highway parts Representativeness e. g. Vmax: low 60 km/h, mid 100 km/h, high 140 Defined mix out of low mid and high speed trips e. g. Representativeness each phase 300 +/- 30 sec Preconditioning Standardisized conditions Environmental conditions (temperature, altitude) e. g. Standardisized conditions. Limitation of conditions to be realized by today laboratories. temperature range 10°C to 30°C Content of constant speed phases Representativeness of urban and highway driving conditions Limitation of the pool of trips per category e. g. urban: 100 trips, rural 100 trips, highway 100 trips Exclusion of trips that cannot be easily linked to others Amount and duration of stop phases Representativeness e. g. low </= 4 stops, mid </= 2 stops, high speed: none, no stop between rural and highway