Abstract: The device comprises a control system (100) commanded by sensing means consisting of at least one optic fibre transmitting a radiation to at least one radiation detector, said sensing means co-operating with a rotating element driven by the engine, which consecutively intercepts the receipt of the radiation. The control system (100) determines the beginning and duration of injection at the injectors (11) incorporated in the fuel-transfer circuit (10), which circuit comprises two pipes, namely a fuel inlet pipe (19) and a fuel outlet pipe (20) which are interconnected and in heat exchange relation and are located at the back of each injector in order to obtain a closed transfer circuit and to ensure continuous circulation of fuel at the back of each injector, thus avoiding in-line vaporization of said fuel.

Abstract: Method of and apparatus for preparation of a combustible mixture of different mixing ration for a main combustion chamber and for a subsidiary combustion chamber for an internal combustion engine. In such apparatus there are a main suction channel terminating into the main combustion chamber and a subsidiary suction channel terminating into the subsidiary combustion chamber, both combustion chambers being separated from their suction channels by suction valves. The fuel is injected via an injection nozzle into the suction tract of the engine and the formed combustible mixture is sucked into the main combustion space of the engine. Simultaneously a part of the fuel is taken away from the injected fuel jet by a stream of sucked-in air, forming a combustible mixture which is sucked into the subsidiary combustion chamber of the combustion engine.