SU1509559A1 - Electronic ignition system - Google Patents

Abstract

This invention relates to electrical equipment for gasoline reciprocating internal combustion engines, in particular, to an ignition system. The aim of the invention is to simplify the ignition system. For this purpose, a current transformer 13 is introduced into the ignition system with a controlled inductive drive 1 on transistors 2 and 3 and a trigger on transistors 8 and 9, controlled by a trigger pulse sensor. The flow in the inductive current accumulator causes a pulse in the secondary winding of the transformer 13, which is fed to the trigger input and switches it to the initial closed state. In this case, the resistor 17 serves as a load for the transformer 13. Diode 15 ensures that the reverse voltage is not transmitted to the base of the transistor 8 after locking the key. 2 Il.

Description

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The invention relates to electronic circuits of internal combustion engines, in particular, to thyristor electronic ignitions from induction-. energy storage devices.

The disadvantage of these ignition systems is their relative complexity, as well as the relative difficulty of their integral performance due to the presence of a capacitor in them.

The purpose of the invention is to simplify the device.

Fig. 1 is a diagram of an electronic ignition system; in FIG. 2, temporary data for the system operation.

The ignition system includes an inductive drive 1, the power transistor switch assembled on transistors 2 and 3 is connected to the primary winding circuit of a transformer whose transistor 2 and 3 are connected to its secondary winding circuit through a rectifying diode 4 The primary winding of the ignition coil 7 is included in the capacitor circuit 5. The trigger is assembled on transistors 8 and 9, between the collector of transistor 9 and its. the load resistor 10 of the diode 11 is turned on, and the common point of this diode with the collector of transistor 9 is connected via a resistor 12 to the input of a transistor switch (transistors 2, 3). As an element of fixing the set by an inductive drive 1 of a given magnetic energy, a circuit is used that includes a current transformer 13, the primary winding of which is connected in series with the primary winding of the inductive drive 1, and the secondary windings of this current transformer, in parallel with which the shunt is turned

At the time of the opening of the chopper 20, a thyristor 6 is opened through the capacitor 1, through which the storage capacitor 5 is discharged, and the ignition coil 7 forms a spark. At the same time, through the capacitor 19 and the diode 18, the flip-flop switches to the state in which the transistor 8 is closed and the transistor 9 is open. The signal of the open transistor 9 through the resistor 12 opens the power transistor switch, as a result of it through the primary windings of the inductive storage device 1 and the current transformer 13 starts a linearly increasing current. This current is transformed in the current transformer into its secondary winding, forming a linearly increasing voltage across the resistors 14 and 17. This co-arrangement of the circuit is maintained until the Zener diode 16 is opened. After this Zener diode (or in another diode version) is opened, the trigger switches to - the transistor 8 is open, the transistor 9 is closed. In this case, the magnetic energy of the inductive storage begins to decrease, as a result of which a current is transformed in its secondary winding, which through diode 4 again

35

It charges the capacitor 5. In this state, the circuit remains until the next breaker 20 opens. At the subsequent contact spread, the cycles are repeated.

The resistor 17 serves as a load transformer 13 current. The diode 15 serves to suppress the reverse voltage to the base of the transistor 8 directly after locking the key 2 and 3. Resistance 14 serves to limit and amplitude the voltage across the secondary resistor 14 through the first d-lc, j, "11"

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15 and through the second diode (or 40

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16 and the first diode 15 through a resistor

The 17 offset is connected to the second power bus. The base of the transistor 8 is also connected via a control circuit formed by a diode 18 and a capacitor

19, with contacts, with the breaker 20. A breaker 20 is also connected via a control circuit formed by a capacitor 21 and a diode 22 to the control electrode of the thyristor 6,

moment lock transistor switch 2 and 3.

Claims (1)

H, and FIG. 2 shows graphs of timing diagrams of signals of the ignition system. The graphs respectively show the voltage on the converter 20; the voltage across the collector of transistor 9; the primary current of the inductive storage 1; voltage across capacitor 5. Formula of invention An electronic ignition system containing an inductive drive on Electronic ignition system works as follows At the time of the opening of the chopper 20, a thyristor 6 is opened through the capacitor 1, through which the storage capacitor 5 is discharged, and the ignition coil 7 forms a spark. At the same time, through the capacitor 19 and the diode 18, the flip-flop switches to the state in which the transistor 8 is closed and the transistor 9 is open. The signal of the open transistor 9 through the resistor 12 opens the power transistor switch, as a result of it through the primary windings of the inductive storage device 1 and the current transformer 13 starts a linearly increasing current. This current is transformed in the current transformer into its secondary winding, forming a linearly increasing voltage across the resistors 14 and 17. This co-arrangement of the circuit is maintained until the Zener diode 16 is opened. After this Zener diode (or in another diode version) is opened, the trigger switches to - the transistor 8 is open, the transistor 9 is closed. In this case, the magnetic energy of the inductive storage begins to decrease, as a result of which a current is transformed in its secondary winding, which through diode 4 again 0 e moment lock transistor switch 2 and 3. H, and FIG. 2 shows graphs of timing diagrams of signals of the ignition system. The graphs respectively show the voltage on the converter 20; the voltage across the collector of transistor 9; the primary current of the inductive storage 1; voltage across capacitor 5. Formula of invention An electronic ignition system containing an inductive drive on the transformer, the first output of the primary winding of which is connected to the first output output of the transistor switch, the second output output of which is connected to the first power bus, the secondary winding of the transformer through a rectifying diode and a storage capacitor connected to the primary circuit of the ignition coil, the thyristor, the anode of which is connected to the point the connection of the cathode of the rectifying diode and the storage capacitor, and the cathode to the common connection point of the output of the secondary winding of the transformer and the output of the primary winding ignition coils, a thyristor control circuit connected between the chopper contacts connected to the first and second power lines through a resistor, and a thyristor control electrode, a trigger control circuit connected between the chopper contacts and the trigger input whose output is connected to the input of a transistor switch, a zener diode connected to the trigger input, characterized in that, for the sake of simplicity, a first diode, a shunt resistor, a bias resistor and a current transformer, the first 0 the output of the primary winding of which is connected to the second output of the primary winding of an inductive storage transformer, the first output of the secondary winding is connected to the first control terminal of the shunt resistor and to the cathode of the first diode, the anode of which is connected to the second output of the zener diode and the first output of the bias resistor, the second output of which is the second conclusion 0 of the shunt resistor is connected to the second terminals of the secondary and primary windings of the transformer, current, connected to the second power bus. U JCII1:  I L MP la