1. RDE Regulation 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

2. RDE Regulation 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.

3. RDE Regulation 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.

4. RDE Regulation Random Cycle, Cycle Generation
Step 3: stop phases between the short trips of each 8 sec. are inserted to ensure the driveability.

5. RDE Regulation Limitation Curve – 116d MT
Random Cycle, Cycle Generation
Limitation Curve – 116d MT
Vehicle specific limitation curve
Limitation curve used for the preselection of short trips (curve includes a reserve for driveability)
Curve covering all short trips

6. Random Cycle
Cycle Generation

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
e.g. Vmax: low 60 km/h, mid 100 km/h, high 140
Representativeness
Defined mix out of low mid and high speed trips e.g. each phase 300 +/- 30 sec
Preconditioning
Standardisized conditions
Environmental conditions (temperature, altitude) e.g. temperature range 10°C to 30°C
Standardisized conditions. Limitation of conditions to be realized by today laboratories.
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
e.g. low </= 4 stops, mid </= 2 stops, high speed: none,
no stop between rural and highway