Wrong reference trailers DBvol and DCvol
The reference trailers for the volume oriented trailers of the types DB and DC are wrong. If you simulate for example a trailer of the vehicle group 622V with the exact properties given in the Masterexcel for the reference trailer, the efficiency ratio deviates from 1. Thus must be incorrect. You can see in the file "reference_trailer.csv" that the masses don't match with the masses in the Masterexcel.