JPS6165274U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the ignition timing control device of this invention, FIG. 2 is a diagram showing the relationship between rotational speed and ignition timing to explain the operation of the ignition timing control device. FIG. 4 is a partial circuit diagram of another embodiment of the ignition timing control device of this invention. 1... Ignition power supply coil, 2... Diode, 3... Capacitor, 4... Thyristor, 5... Ignition coil, 9
...Signal power generation coil, 14...Advance angle calculation circuit, 15...
Power supply circuit, 20...integrator circuit, 26...transistor. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Amendment April 29, 1980 The scope of claims for utility model registration is amended as follows.

[Claims for Utility Model Registration] An ignition power supply coil provided in a magnet generator, a capacitor charged to a certain polarity by the ignition power supply coil, and a capacitor that conducts upon receiving a signal from the gate at the ignition timing of the engine. a thyristor that discharges the electric charge to the primary coil of the ignition coil to generate a high voltage in the secondary coil and discharge sparks to the ignition plug; a signal generator coil that generates an engine ignition signal in synchronization with the magnet generator; In response to the output signal of this signal generator coil, the ignition timing is retarded when the engine starts and in the low speed rotation range, and the circuit that fires the thyristor receives the output of the ignition power supply coil or signal generator coil and controls these voltages. Integrating circuit whose voltage increases depending on the peak value and number of outputs,
A switching element that turns off when the output of the integration circuit is below a certain value and turns on when it exceeds a certain value; when this switching element is on, it becomes operational and receives the signal from the signal generator coil to adjust the engine rotational speed. An ignition timing control device comprising an advance calculation circuit that calculates the ignition timing according to the rotation speed and fires the thyristor so that the ignition timing is advanced when the rotation speed exceeds a certain value.

Claims (1)

[Scope of utility model registration request] An ignition power supply coil installed in a magnet generator, a capacitor charged to a certain polarity by this ignition power supply coil, receives a signal to the gate at the ignition timing of the engine, conducts it, and transfers the charge of the capacitor to the primary of the ignition coil. A thyristor that generates a high voltage in a coil and generates a high voltage in a secondary coil to discharge sparks to a spark plug, a signal generator coil that generates an engine ignition signal in synchronization with the magnet generator, and an output signal of this signal generator coil. When starting the receiving engine and in the low-speed rotation range, the ignition timing is retarded, and the voltage increases according to the output of the circuit that fires the thyristor, the ignition power supply coil, or the signal generation coil, and the voltage peak value and number of outputs. a switching element that is turned off when the output of this integration circuit is below a certain value and turned on when it exceeds a certain value; and a switching element that is activated when the switching element is turned on and receives the signal from the signal generator coil. An ignition timing control device comprising an advance calculation circuit that calculates the ignition timing according to the engine speed and fires the thyristor so that the ignition timing is advanced when the engine speed exceeds a certain level.