RU1838665C - Combination electronic ignition system - Google Patents

Abstract

Usage: in electronic ignition devices of internal combustion engines. SUMMARY OF THE INVENTION: comprises a storage capacitor, a pulse charge circuit, a main electronic switch and an ignition coil. The first input of the capacitor is connected to the output of the pulse charge circuit, its second input to the output of the switch, and its output to the first input of the ignition coil, the second input of which is connected to the output of the additional electronic switch, the input of which is connected to the output of the chopper needle circuit. A feature of the invention is the introduction of a switch and a delay circuit, which improves the conditions of combustion of the combustible mixture and thereby increase the efficiency in the ignition system. 2 ill. O &

Description

 The invention relates to electronic ignition devices for internal combustion engines, in particular for automobiles.

The purpose of the invention is to increase the efficiency of the action of a spark on a combustible sphyx by preliminary electrostatic treatment of the spark gap of a candle before a spark arises.

By electrostatically treating the spark gap of a candle until a spark is formed around the electrode, a zone of electrically conductive ionized gas is created. Formed with ndKpa falls into the ionized mixture zone and due to the turbulence of the compressed gas

stretches far beyond the spark gap. When the voltage rises to 12 kV, a plasma forms between the electrodes. It provides a powerful flame front that propagates intensively in the volume of the combustion chamber, which is capable of igniting a larger charge of fuel than an instantaneous localized spark. The result is a more complete combustion of the mixture, it is possible to reduce the ratio of fuel to air, to reduce

TOXICITY.

The proposed device is significantly different from the described prototype in that it combines positive features

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prototype for the formation of sparks of increased duration and elements of plasma sparking. Using an additional electronic switch in dynamic mode, the low-voltage coil of the ignition coil is connected to the on-board power supply 1.0 ms before the spark. As a result, due to the increase in current in the low-voltage winding, the EMF arising in the high-voltage winding creates a voltage of 3.0 kV in the spark gap. This is how the ionization of the air-fuel mixture occurs in the area of the spark plug electrodes. After a delay of 1.0 ms, a spark is generated by the thyristor circuit with a storage capacitor, during which overvoltages in the circuit block an additional electronic switch, interrupting the current from the power source in the low-voltage coil of the ignition coil. The resulting EMF forms the inductive phase of the spark, supporting its burning. Thus, the scheme for increasing the duration of the spark in the proposed device is a significant difference from the prototype.

Figure 1 is a functional diagram of the device; Fig. 2 is a voltage plot on the electrodes of a candle created by a device.

The combined electronic ignition system contains a storage capacitor 1, the first input of which is connected to the output of a pulse charge 2. The main electronic switch 3 is also connected to the storage capacitor 1 by its output. The output of the storage capacitor 1 is connected to the ignition coil 4, The second input of the ignition coil 4 is connected to the output of the additional electronic switch 5, the input of which is connected to the output of the signal conditioning circuit of the breaker 6. The output of the latter is connected to the delay circuit 7, connected th its outlet with a basic electronic switch 3.

The device operates as follows.

At the end of the previous sparking, the storage capacitor 1 is charged from a pulsed charge 2. After the signal about the opening of the contacts of the chopper arrives through the signal conditioning circuit of the chopper 6 and the additional electronic switch 5, the low-voltage coil of the ignition coil 4 is connected to the voltage source of the on-board DC network (battery torus or generator). At the same time, it starts

delay circuit 7, which forms the time interval of the electrostatic processing of the spark gap of the candle. When an increasing current flows in the low-voltage winding of the ignition coil 4 in its high-voltage winding, which is connected to the candle through a distributor, a high voltage emf is formed. After the set time interval has elapsed

the delay circuit 7 opens the main electronic switch 3 and the discharge capacitor 1 is discharged through the low-voltage winding of the ignition coil 4. This forms the capacitive phase

sparks. During sparking in the low-voltage winding of the ignition coil 4, a reverse polarity high voltage pulse is generated (relative to the connection via the additional electronic switch 5) of polarity, which turns off the main 3 and additional 5 electronic switches. The storage capacitor 1 is recharged from the pulse charge 2. An additional electronic switch 5 interrupts the flow of current from the on-board network in the low-voltage winding of the ignition coil 4, which causes the formation of an EMF in the high-voltage winding and a decreasing oscillatory process. So

the inductive phase of the spark is formed and its burning is maintained for a long period of time, which is facilitated by the electrostatic preparation of the spark gap,

The spark-generating voltage diagram obtained on the oscilloscope screen by connecting it to a part of the high-impedance divider shunting the spark gap is shown in Fig. 2.

Claims (1)

Claims A combined electronic ignition system comprising a storage capacitor, a first input of which is connected to an output of a pulse charging circuit; the second input is with the output of the electronic switch, and the output is with the first input of the ignition coil, and the chopper signal generating circuit, characterized in that, in order to increase efficiency 0 the action of the spark on the combustible mixture, an additional electronic switch and a delay circuit are introduced, the output of which is connected to the input of the main electronic switch, the input is connected to the first output of the circuit breaker signal generation circuit, the second output of which is connected to the input of the additional electronic switch connected to its second output ignition coil input. 6 3 t / uak # in A Figure 1