Download GFV 33-03e

1.
Purpose
This regulation provides a harmonized method for the classification,
evaluation and approval of:

dual fuel retrofit systems to be fitted in heavy duty road vehicles with
compression ignition engines to permit to use of LPG or NG (compressed
natural gas/bio-methane/liquefied natural gas) in dual-fuel mode;

dual fuel retrofitted engines to be fitted in heavy duty road vehicles
equipped with compression ignition engines

1
reserved1
This paragraph is reserved for future requirements for non-road mobile machinery, agricultural and
forestry tractors engines, approved according regulation No. 96.