DIFF Subgroup
F02D 19/027 Full Title
Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures (the non-fuel substances being gaseous F02D21/00) > peculiar to engines working with gaseous fuels
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.