Diesel engines; diesel engines except for land vehicles; diesel engines for machines and stationary plants; diesel injection devices; diesel machines; diesel motors; diesel turbine engines except for land vehicles; diesel fuel injection apparatus and devices for land vehicles and for vehicles other than land vehicles; diesel fuel injection apparatus and systems for internal combustion engines; diesel fuel injection pumps; fuel conversion apparatus and devices for internal combustion engines; fuel feed apparatus and devices for engines; fuel injectors for engines and motors; pneumatic fuel injectors for engines and motors; fuel systems for internal combustion engines and motors; engine fuel injection apparatus; fittings for diesel engines and motors; fittings for diesel fuel injection devices and apparatus; gas injection apparatus, devices, systems and components therefor for engines and motors for land vehicles and for vehicles other than land vehicles