• Dr. Behrning indicated that the presentation is not representing an official national German view but is based on his and TUV’s experience and discussions with stakeholders, in order to provide a view of how Germany deals with D-F.
• Procedure is to deduct the difference of the diesel-mode emission (each substance) from the one measured in the D-F mode.
• There is no national approval system. Each vehicle has to be inspected (based on German 70 StVZO)
• CNG-LPG D-F mode is possible according to ECE R67 or R.110. Emissions based on R.49, ESC, ELR & ETC
• European reference fuels are used.
• About 60% of German diesel engines are failing the initial emissions test so it is difficult to find one to convert in order to test on D-F.
• This would be a transition before having something on the European level.
Discussion
• It is difficult to certify an engine if they don’t know what the baseline diesel engine emissions are.
• Need a way to prove system performance and then move to harmonization.
• Germany is more interested in certifying systems to Euro 6 and not any lesser levels. The certifications regarding D-F also are dealt with on a state-by-state basis.
• Systems can’t be low cost, low performance and high benefit.
• There also must be a way to determine how the D-F system itself performs.