RU1838664C - Electronic ignition device - Google Patents

Abstract

Usage: in the engine ignition systems. SUMMARY OF THE INVENTION: the device includes a key control unit, an electronic key, an ignition coil, an electric power source and a voltage converter, consisting of an alternating voltage auto-generator with a transformer at the output and a current suppressor, the input of which is connected to the secondary winding of the transformer, and the output is Converter with an output - converter, shunted by capacitor, switch. A feature of the invention is the introduction of a second output terminal of the converter and switch, which allows to increase the energy and duration of the spark discharge. 2 ill.

Description

The invention relates to electronic ignition devices with an induction coil for internal combustion engines (ICE) and can be used in motor vehicles.

The purpose of the invention is to provide increased energy up to multiple (and as a consequence, duration) spark discharge using any standard ignition coil with a low and high primary winding. It is achieved by increasing the spark current by introducing an additional power supply into the short-circuit of the primary winding, which is a direct-to-constant-voltage converter.

The invention is illustrated in the functional diagram in FIG. 1. The set of all essential features of the invention

constitute a ignition coil. 1, an electronic key 2, a key control unit 3, a power supply 4, a dc-to-dc converter 5, available in the prototype device. The novelty of the technical solution is that the output of the converter 5 is included in the circuit not of the secondary (high voltage), as in the prototype, but of the primary winding of the coil 1, moreover, in series and in accordance with the source 4. In addition, it is possible to exclude the source 4 from the primary winding circuit (using switch 6), and then the current in this circuit will be created only by converter 5. In this case, any standard ignition coil with a low and high resistance primary winding will be applicable, but practically sufficient in all cases the output voltage of the converter does not exceed 40 V.

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The voltage suppressor .5, in particular, consists of a self-oscillating blocking oscillator 7 with an output winding 10 of a transformer, a current rectifier 8 and a capacitor 9.

Figure 1 shows a functional diagram of an electronic ignition device; Fig. 2 is a schematic diagram of an oscillator with overcompensated stabilization of the output voltage in an electronic ignition device.

An example of a specific embodiment of the device is illustrated in the diagram of Fig. 2, It operates as follows. After turning on the power source 4 (the switch is not shown), the blocking generator 7 self-excites, and an alternating voltage arises at the output winding 10 of its transformer, which is rectified by diode 8, and the ripple voltage at the output of the rectifier is smoothed by capacitor 9. The voltage to This capacitor is the output voltage of the converter. Since it is connected in series to the primary winding of the ignition coil 1 in accordance with the voltage of source 4, when the electronic switch 2 is open, when energy is accumulated in the spark discharge coil, the current in the winding is determined by their sum. It is essential that the source of energy in this case is mainly a capacitor and only partly a low-power blocking generator 7. Therefore, the capacitance of the capacitor must be large enough so that the voltage across it decreases slightly during storage. At time intervals when key 2 is closed, the capacitor is recharged from the blocking generator. The required output power of the converter is equal to the power spent on sparking divided by the duty cycle of the pulses opening the electronic key. Otherwise, the described device is similar to any transistor ignition system with metered energy storage in the short circuit. Dosing is carried out using the key control unit 3, which opens and closes the key 2 at the required time. Without it, if the key is opened for too long, the capacitor will be useless to discharge, and due to a decrease in the voltage across it, the rupture current in the primary coil circuit. With a short key opening time, this current may turn out to be significantly less than optimal.

The voltage converter uses a blocking oscillator with overcompensated stabilization. As can be seen from the diagram in figure 2 during its operation, when the transistor 11 is open, the rectifier 8 is closed and vice versa, so that the capacitor 9

charged by reverse pulses. In the base circuit of the transistor 11, these voltage pulses (taking into account the transformation coefficient) act in accordance with the voltage of the power supply, and their total value is limited by the zener diode 12. Due to this, with a decrease in the voltage of the source 4, the back-up pulses generated by the blocking will increase to a larger amplitude , and when

This will increase the voltage across the capacitor. Thus, over-compensated voltage stabilization at the output of the converter is implemented.

Claims (1)

Formula invented and An electronic ignition device comprising a voltage converter that includes first and second input and first output terminals, an ignition coil that includes a primary winding, the first terminal of which is connected to a first output terminal of the converter, and a secondary winding, the first terminal of which is the output of the device, an electronic key and a key control unit, each of which has three input terminals. A power supply, the positive terminal of which is connected to the first input terminal of the voltage converter, the negative terminal of which is connected to the second input and first terminals of the voltage converter, electronic key and key management unit, different in order to increase the energy and duration of the spark discharge by increasing the spark current, the second output terminal of the voltage converter is connected, which is connected to the second input terminal an electronic key, a switch, the first and second output terminals of which are connected respectively to the plus and minus terminals of the power supply, the input terminal of which is connected to the second terminal of the primary winding of the ignition coil, the second input terminal of the key control unit is connected to the positive terminal of the power supply, and a third of its input terminal connected to a third input terminal of an electronic key, the primary and secondary windings of the ignition coil being connected in series. cpv & j