Abstract: Method for driving an electromagnetic actuator in a diaphragm carburettor for control of air/fuel ratio foresees at least the following steps: associating an electromagnetic actuator in a diaphragm carburettor for control of air/fuel ratio with the current generation device in an internal combustion engine; driving the aforementioned electromagnetic actuator with pulses suitable for generating the force necessary to actuate the actuator; generating said drive pulses of the actuator in the moments when the current pulses of the aforementioned current generator are such that the maximum current is available during the cycle of the motor.

Abstract: A diaphragm carburettor comprises a diaphragm dosager (2) provided with a diaphragm (3) that separates a first chamber at constant pressure (4) from a second fuel dosaging chamber (5) intercepted by a valve controlled by the diaphragm, said valve being operatively connected with said diaphragm (3), the aforementioned carburettor also foreseeing an electromagnetic actuator (1) associated with said diaphragm (3) to control the opening and closing of said valve, where said actuator (1) also comprises at least one mobile coil (6) directly fixed to the diaphragm, and a fixed magnetic field generator (7) suitable for guiding said coil (6).

Abstract: A diaphragm carburettor comprises a diaphragm dosager (2) provided with a diaphragm (3) that separates a first chamber at constant pressure (4) from a second fuel dosaging chamber (5) intercepted by a valve controlled by the diaphragm, said valve being operatively connected with said diaphragm (3), the aforementioned carburettor also foreseeing an electromagnetic actuator (1) associated with said diaphragm (3) to control the opening and closing of said valve, where said actuator (1) also comprises at least one mobile coil (6) directly fixed to the diaphragm, and a fixed magnetic field generator (7) suitable for guiding said coil (6).

Abstract: Method for automatic control of air/fuel ratio ? in an internal combustion engine equipped with catalyst comprises the following steps: measuring the temperature of the exhaust gases, or of the catalyst; keeping the engine at a constant feed and speed whilst the air/fuel ratio ? is varied with increases or decreases; selecting a value of ? for the operation of the engine that: a) is close to the inversion of slope of the temperature curve TSC of the exhaust gases according to ?; and b) has excess fuel with respect to the air/fuel stechiometric ratio (?<1).

Abstract: Method for driving an electromagnetic actuator in a diaphragm carburettor for control of air/fuel ratio foresees at least the following steps: associating an electromagnetic actuator in a diaphragm carburettor for control of air/fuel ratio with the current generation device in an internal combustion engine; driving the aforementioned electromagnetic actuator with pulses suitable for generating the force necessary to actuate the actuator; generating said drive pulses of the actuator in the moments when the current pulses of the aforementioned current generator are such that the maximum current is available during the cycle of the motor.