Abstract: An engine stopping device for stopping an internal combustion engine provided with an ignition system energized by a generator driven by the engine. The stopping device comprises a switch for making ineffective at least one of the elements of the ignition system, an actuator for actuating the switch into the operated state and a retaining device for retaining the switch in the operated state until the engine is brought to a standstill. Although it takes time for the engine to be brought to a standstill, the operator just has to give the actuator one touch operation, such as pressing a button, and may release the actuator before the standstill. Subsequent starting of the engine requires no extra operation.

Abstract: A voltage regulator for use with a polyphase magneto generator and in combination with a rectifier circuit provided to rectify the output of the generator to charge a battery, comprises at least two thyristors having the anodes respectively connected to the output terminals of the generator having phases adjacent to each other, having the cathodes connected to the negative output terminal of the rectifier circuit, and having the gates connected to each other. A trigger device is adapted to supply gate signals to the gates of the thyristors when the voltage of the output terminal having a phase in advance of the phases of the output terminals to which the anodes of the thyristors are connected exceeds a predetermined value. As the battery terminal voltage is excessive the thyristors are rendered conductive to short-circuit the output of the generator.

Abstract: An ignition system for a multiple cylinder internal combustion engine comprises a power supply, a plurality of ignition coils, a plurality of control circuits, each provided in association with a respective one of the ignition coils for controlling the primary current of the associated ignition coil, and a plurality of signal sources producing signals in turn and in time with the rotation of the engine, each of the signal sources provided in association with a respective one of the control circuits, and adapted to produce a signal in advance of the ignition timing of the associated ignition coil. Each of the control circuit includes a gate turn-off thyristor connected in series with the primary winding of the associated ignition coil.

Abstract: An ignition system for a multicylinder internal combustion engine comprising a turn-on signal source for producing a turn-on signal a plurality of times per revolution of the engine output shaft, a plurality of trigger signal sources each producing a trigger signal once per revolution, and a plurality of gate circuits enabled by the trigger signal to permit the application of the turn-on signal to the associated one of a plurality of capacitor discharge ignition circuits. Thus each ignition circuit operates once per revolution. The turn-on signal is produced at angles varying with the engine speed, and various ignition angle characteristics can be obtained.

Abstract: Disclosed herein is an ignition system for an internal combustion engine including a capacitor charged by charge power source, a thyristor for discharging the capacitor through the primary of an ignition coil and a magneto AC generator including a signal generating winding for supplying a gate signal to the thyristor. The ignition system is characterized in that rate of change of the magnetic flux interlinked with the signal generating winding has at least two successive local maximum points, so that at least two successive peaks of the same polarity appears in the voltage induced in the signal generating winding by the magnetic flux variation. The waveform of the voltage induced is utilized for ignition angle advance.

Abstract: A flywheel magneto generator is disclosed, which includes a flywheel rotor, a stator disposed in the flywheel rotor and a signaling stator disposed outside said flywheel rotor. The flywheel rotor comprises a bowl-like flywheel, a plurality of arcuate permanent magnets engaged at the ends thereof with each other and aligned on the inner surface of the peripheral wall of the flywheel, and securing means for securing the magnets to the flywheel. The invention is characterized in that the securing means comprises a single wedge-like magnetic member interposed between the opposing ends of a pair of the permanent magnets and a screw coupling for coupling said wedge-like magnetic member to the peripheral wall and for urging said wedge-like magnetic member radially outwardly. The screw coupling is provided with an extending member of a magnetic material extending through the peripheral wall of the flywheel, magnetically insulated from the peripheral wall and having an outer end exposed outside the flywheel.

Abstract: An automatic voltage regulator for an excited AC generator comprising at least one controlled rectifier for conducting the field current of the generator, a trigger signal supplying means for supplying a trigger signal to the controlled rectifier when the controlled rectifier is forward biased, a voltage detection circuit for detecting the output voltage of the generator, an inhibiting circuit for inhibiting turn-on of the controlled rectifier when the instantaneous value of the voltage detection circuit exceeds a predetermined voltage, characterized in that the voltage detection circuit comprises a phase shifting circuit receiving and shifting the phase of the output voltage of the generator. The amount of phase shift may be selected so that the inhibiting operation terminates and hence the turn-on of the controlled rectifier is effected at any angle within a wide range to adjust to the load being energized.

Abstract: An ignition system for an internal combustion engine wherein ignition timing is retarded when the engine speed exceeds a predetermined value. The ignition angle retardation is effected by an angle retarding circuit for by-passing at least part of an AC ignition signal. The angle retarding circuit is actuated responsive to an output of a phase-advanced signal generating circuit for generating an AC signal in advance in phase of the ignition signal. The utilization of the phase-advanced signal generating circuit enables the ignition angle to be varied over a wide angle.

Abstract: An ignition system for an internal combustion engine having an AC generator compriss an ignition coil energized by an output from the generator. At an angle in advance of ignition timing, a first thyristor connected across the generator output terminals is turned on to permit a short-circuit current therethrough. A capacitor is charged by an output from the generator, and is discharged through a second thyristor which is triggeed at the ignition angle. The discharge current is reversely applied to the first thyristor and the first thyristor is turned off. Interruption of the short-circuit current through the first thyristor leads to a large current through the primary of the ignition coil, causing a high voltage in the secondary with resultant spark in the ignition plug.

Abstract: An ignition system for an internal combustion engine having an AC generator comprises an ignition coil energized by an AC output from the generator. A first thyristor is connected in series with the primary of the ignition coil and permits and interrupts the current through the primary. The first thyristor is turned on at a first angle in advance of ignition. A capacitor is charged by an AC output from the generator, and is discharged when a second thyristor conducts to apply a reverse voltage across the anode and cathode of the first thyristor. The second thyristor is triggered at a second angle.

Abstract: A device for preventing an overrunning operation of an internal combustion engine, provided in a capacitor discharge type ignition system comprising a magneto generator including an ignition power coil and at least one loading coil and an ignition circuit including a capacitor arranged to be charged from said ignition power coil of said magneto generator, an ignition coil and a discharging thyristor so arranged that energy from said capacitor is discharged through the primary side of said ignition coil when said discharging thyristor is triggered in time with said internal combustion engine, said device comprising an ignition failing thyristor provided so as to shunt said discharging thyristor whereby a discharge current from said capacitor is prevented from flowing through said ignition coil and also means to prevent a hysteresis on repetition of failure and success to ignite said engine. The ignition failing thyristor is adapted to be triggered by a voltage responsive to the revolution number of the engine.

Abstract: A signal source for use in a breakerless ignition system for an internal combustion engine provided outside a bowl-like flywheel of a flywheel type magneto generator, but cooperating with at least one of a plurality of permanent magnets in said magneto generator. The signal generator comprises timing pole means with one end thereof connected to a pole piece of the permanent magnet and with the other end radially extending through and exposed exterior of the cylindrical wall of the bowl-like flywheel in a spaced relationship from the magnet and signal coil means disposed closely adjacent to and outside of said bowl-like flywheel so that said coil means is interlinked with magnetic flux through said timing pole means.

Abstract: A voltage regulator for a magneto AC generator comprising a battery charging generator coil and a loading generator coil, said voltage regulator comprising a first voltage divider to detect a voltage proportional to a terminal voltage of a battery; a second voltage divider to detect a voltage proportional to an output voltage of the loading generator coil; and a controlled rectifier arranged to short-circuit the battery charging generator coil and adapted to be conductive when either of the voltages detected by the first and second voltage dividers is greater than a predetermined value, the battery charging and loading generator coils being arranged to be magnetically bonded with each other.

Abstract: A breakerless ignition system for an internal combustion engine comprising an ignition power supply, a capacitance discharge type ignition circuit including a capacitance, an ignition coil and a first semiconductor switching means to discharge the capacitance through the ignition coil on the primary side thereof, and an ignition signal source to trigger the first semiconductor switching means to be turned on, the ignition system further comprising an ignition inhibiting means including a second semiconductor switching means arranged so that it periodcally prevents the ignition power from being applied to the ignition circuit when the speed of the engine becomes less than a predetermined value and also when the intake vacuum pressure of the engine exceeds a predetermined value.

Abstract: A capacitance discharge type breakerless ignition system for an internal combustion engine, comprising ignition coil means including a main and an auxiliary primary coils and a secondary coil, capacitance means including two capacitances connected to said main and auxiliary primary coils, respectively to be charged by a charging voltage and at least one ignition plug connected to said secondary coil, time constants of said connections of said main primary coil and said corresponding capacitance and of said auxiliary primary coil and said corresponding capacitance when said capacitances are simultaneously discharged through said main and auxiliary primary coils being different from each other whereby said ignition plug is sparkingly discharged for a longer continuation time.

Abstract: An ignition system for an internal combustion engine comprising a power supply, and an ignition circuit including an ignition coil having a primary coil portion connected to said power supply and a secondary coil portion connected to at least one ignition plug, said ignition plug disposed within an operating chamber of said engine and a contact breaker connected to said primary coil portion, said ignition system characterized by comprising means to override said ignition circuit and means to periodically effect the operation of said overriding means.

Abstract: A signal source for use in a breakerless ignition system for an internal combustion engine, comprising a stator having a plurality of normally igniting signal coils arranged so that they produce respective ignition timing signals at respective ignition points slightly different from each other, said normally igniting signal coils being operatively associated with a breakerless ignition system so that the ignition timing signals are supplied thereto and having said respective ignition timing signals selectively applied in response to increase in the revolution number of an internal combustion engine, said signal source characterized by further comprising a starting signal coil positioned to produce a starting signal at the ignition point advanced in phase relative to some of said normally igniting signal coils relatively retarded in phase and operated when said engine is started at a relatively lower speed, said starting signal coil operatively associated with said breakerless ignition system so that said star

Abstract: In an ignition system for an internal combustion engine comprising a power source, an ignition coil including a primary coil portion and a secondary coil portion with said primary coil portion supplied with a primary current from said power source and switching means to break said primary current in time with revolution of the engine whereby a high voltage is induced across said secondary coil portion of said ignition coil, a device for preventing the engine from revolving at more than the predetermined speed including a semiconductor controlled switching element connected in parallel to said primary coil portion of said ignition coil; and a control circuit to control said semiconductor controlled switching element so that it is non-conductive upon said engine revolving at less than the predetermined r.p.m. for normal operation of the ignition system and so that said semiconductor controlled switching element is conductive upon the engine revolving at more than said predetermined r.p.m.

Abstract: A signal generator for use in a breakerless ignition system for an internal combustion engine, comprising a magnet rotor rotatable in synchronism with said internal combustion engine and a stator including a plurality of signal coils and a comb-like magnetic core member disposed adjacent to said rotor and having a plurality of teeth-like core portions around which said signal coils are wound, respectively, and a common yoke magnetically connected to said core portions, said signal coils constructed so that incremental voltages are established thereacross from the most advanced position toward the most retarded position and said signal coils divided into at least two series connections of at least alternate signal coils. Each series connection of signal coils has a diode connected in series to the corresponding series connection and the series connections of signal coils are arranged in a parallel manner.

Abstract: A flywheel type magneto generator for a rotary engine comprising a stator including generating coil and a rotor including a flywheel connected to the output shaft of the rotary engine and magnet field mounted on the flywheel, characterized by said flywheel of said rotor having balance weight mounted thereon whereby the output shaft of the rotary engine is balanced in weight.