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An electronic magneto ignition for internal combustion engines has a permanent magnet mounted on the engine fly wheel and rotating therewith. A magnetic field coil has a primary winding and a secondary winding in which ignition current and ignition voltage, respectively, are produced during the pass

An electronic magneto ignition for internal combustion engines has a permanent magnet mounted on the engine fly wheel and rotating therewith. A magnetic field coil has a primary winding and a secondary winding in which ignition current and ignition voltage, respectively, are produced during the passage of the permanent magnet. A switching transistor is connected in parallel with the primary winding and in parallel with a diode poled opposite to the emitter-collector path of the transistor. An electronic control circuit blocks the switching transistor at the desired ignition time so that the primary circuit is interrupted and the high voltage for the combustion of the fuel is produced in the secondary winding. In the electronic control circuit, a parallel circuit consisting of a first control coil, which has a resistor in series therewith, and a thyristor is connected from the base to the emitter of the switching transistor. Another resistor is connected from the collector of the switching transistor, as a feedback resistor, to the control electrode of the thyristor. A second control coil has a potentiometer connected in parallel, the potentiometer having a movable tap so that a portion of the voltage applied to the resistor is fed to the control electrode of the thyristor. The first control coil is arranged at an angle from the ignition coil and the second control coil is arranged at an angle from the first control coil, as viewed in the direction of rotation of the fly wheel.

대표청구항 ▼

An electronic magneto ignition for an internal combustion engine which has a rotating fly wheel with a permanent magnet mounted thereon, comprising: a magnetic ignition coil mounted adjacent the fly wheel and including a primary winding and a secondary winding for producing an ignition voltage, in r

An electronic magneto ignition for an internal combustion engine which has a rotating fly wheel with a permanent magnet mounted thereon, comprising: a magnetic ignition coil mounted adjacent the fly wheel and including a primary winding and a secondary winding for producing an ignition voltage, in response to rotation of the permanent magnet therepast; a switching transistor including a base, an emitter and a collector, the emitter-collector circuit connected across said primary winding; a first diode connected in parallel to said primary winding and poled opposite the emitter-collector circuit of said transistor; and an electronic control circuit for blocking said switching transistor at a desired ignition time to interrupt the circuit of said primary winding and cause a high ignition voltage in said secondary winding for igniting the fuel mixture of the internal combustion engine, said control circuit comprising a first control coil mounted adjacent the fly wheel spaced at a first angle from said ignition coil in the direction of rotation of the fly wheel, a first resistor connected in series with said first control coil, said first resistor and said first control coil series combination connected across the base-emitter circuit of said transistor, a thyristor including a control electrode, and a controlled conduction path connected in parallel with the first resistor-first control coil combination, a second resistor connected as a feedback resistor between said collector and said control electrode, a second control coil mounted adjacent the fly wheel, a third resistor connected in parallel with said second control coil, said third resistor including a tap connected to said control electrode for applying a portion of the voltage induced in said second control coil to said control electrode, a Zener second diode connected between said base and said collector of said transistor, and a third diode connected between said first control coil-first resistor combination and said base of said first resistor.