1. RDE COM Meeting 16.12.2011 ACEA Page 1 Random Cycle Generator

2. RDE COM Meeting 16.12.2011 ACEA Page 2 Random Cycle Generator Scheme

3. RDE COM Meeting 16.12.2011 ACEA Page 3 Main principle Speed time Vmax < 60 km/hVmax 60 – 100 km/hVmax 100 km/h rural

4. RDE COM Meeting 16.12.2011 ACEA Page 4 Rel. Frequency [%] Random Cycle Duration Statistical Distribution

5. RDE COM Meeting 16.12.2011 ACEA Page 5 Work Plan Testing

6. RDE COM Meeting 16.12.2011 ACEA Page 6 Work Plan Testing Random Cycle / PEMS Testing a_mean_pos [m/s²] NOx [g/km] Comparison NOx emissions of diesel hot start tests

7. RDE COM Meeting 16.12.2011 ACEA Page 7 First Experiences I.Practicability - System readiness about 50% (10 weeks basis) - Modifications needed on cars - IUVP critical - Stationwagon cars and SUV’s most suitable - legalization from authority II.Sources of errors 1.Device issues 1.PEMS-tests not reproducible 2.No plausibility check possible 3.Need to ensure correct operation of PEMS before every test 2.Ruggedization III.Safety - R isk of CO-exposure - Mounting of equipment - Risk of burning due to accessible pipes - Drive on public roads with Helium and Hydrogen bottles PEMS

8. RDE COM Meeting 16.12.2011 ACEA Page 8 Timeline

9. RDE COM Meeting 16.12.2011 ACEA Page 9 Timeline

10. RDE COM Meeting 16.12.2011 ACEA Page 10 Timeline Lab procedure: First prototype of Random Cycle available in mid Jan 2012. Generator is based on a Matlab tool to be used by everyone. Total new approach in the emission legislation (No experience). Driveability information so far limited to fixed RDE cycles (one time effect). Prototype allows to “simulate” PEMS road testing @ lab by choosing similar profile, check comparability to road measurement Road procedure: PEMS measurements in principle known for HD, but application for PC new. First experiences exists for some weeks show already the need for further investigation. Very few (<10) PEMS measurement results in the database.