The device of spark ignition of the fuel mixture
The invention relates to the field of thermal power, propulsion, and electronics in the part of the circuit. The technical result consists in the possibility of creating a device of spark ignition of the fuel mixture with a universal scheme that allows unlimited to increase the capacity of a periodic spark discharge, as well as to improve the efficiency of using accumulated in the intervals between the discharges of energy, to simplify the design of the device and to reduce its weight and size. The device of spark ignition includes sequentially connected to the power source key, the primary winding of the boost pulse transformer and the capacitor. Parallel to the primary winding and the condenser is the key. In series with the secondary winding of the step-up transformer connected to the electrodes of the spark gap, capacitor connected-drive, connected through a switch with a current source or a separate charger. 2 Il.
The present invention relates to the field of thermal power, propulsion, and electronics in the part of the circuit.
Known to us is who or gaseous fuel with air in internal combustion engines, including a constant current source, an ignition coil, which is the step-up transformer, circuit breaker (key) and the distributor (see, for example, A., Khodasevich, T. I. Khodasevich “Guide to the installation and repair of electronic equipment hire. Issue 1. Electronic ignition system”, M., Publishing house “ANAL-COM, 2001, pp. 14-16, Fig. 2.1). Spark, burn the mixture is formed in the spark gap (spark gap) of spark plug equipped with two electrodes. Differing sufficient reliability, and associated widespread in the automotive industry it is this device, the latter has a number of disadvantages. These include, first of all, the transformation of all energy for the formation of sparks to a voltage capable of penetrating spark gap. This is a consequence of the decrease in efficiency, because the ionized gap significantly increases the electrical conductivity. In this regard the most part accumulated in the coil energy is lost in the internal resistance of the source of a spark. For this reason, to obtain large spark energy is irrational to increase the size and weight of the ignition coil or to generate a gap of a sequence of digits. Another disadvantage of devices of this type is the high energy of the emitted radio interference, against which further reduces the energy of the sparks, as well as a noticeable reduction in power spark when heated coil.
In modern devices, ignition breaker contacts are replaced by contactless systems. While retaining the basic principle of the formation of sparks due to the magnetic energy accumulated in the ignition coil in the intervals between the pulses of the discharge (see, for example, the above source, page 33, Fig. 5.1). The disadvantages of these devices are the same with the above.
Also known device of spark ignition, referred to as a condenser. They have increased spark energy at the expense of the capacitor, accumulating the charge in the intervals between the pulses and the discharge transistor or thyristor key in the primary winding of the ignition coil. Schematic of capacitor devices are very diverse (see, for example, the above source, page 83, Fig. 6.6 and 6.7; page 89, Fig. 6.14) when you save the main principle of the transformation of the entire stored energy to a voltage of 20-30 kV able to penetrate the spark gap of the spark at high compression in the engine cylinders. To nedostupova due to insufficient speed of combustion and the desired today reduce exhaust gas emissions. In addition, the application of current of capacitor devices for ignition energy high power burners (gas, fuel oil and others) is possible only with the use of low-intermediate firing burners, which complicates their design. For direct ignition powerful burners requires increasing spark energy in hundreds and thousands of times that in devices of the above type is unattainable. The same applies to launch missile systems.
Closest to the present invention is a capacitor ignition device, comprising sequentially connected to the power source key, the primary winding of the boost pulse transformer and the capacitor. Parallel to the primary winding and the capacitor also has the key. With the secondary winding of the step-up transformer connected to the electrodes of the spark gap (see, for example, the above source, page 30, Fig. 4.4). Inherent in this device the drawbacks of a fully coincide with those for the above capacitor device of spark ignition of the fuel mixture.
The present invention is to create a device of spark ignition of the fuel mixture with
The technical result of the invention is to increase the efficiency of using accumulated in the intervals between the discharges of energy by simplifying the structure of the device, reducing its weight and size, to increase the efficiency of internal combustion engines and improve their environmental performance, lower power radiation interference, and also to simplify the design of burners.
This technical result is reached due to the fact that the device of spark ignition of the fuel mixture, comprising sequentially connected to the power source key, the primary winding of the boost pulse transformer and a capacitor mounted in parallel to the primary winding and the capacitor key and United with the secondary winding of the step-up transformer to the electrodes of the spark gap in series with a secondary winding connected to the capacitor drive connected through the switch with the power source or a separate charger.
The essence of the invention consists in the following.
In the prototype, all accumulated in the capacitor energy is simultaneously used for ionization of the spark gap and the formation of sparks. When ionization of the spark between the pressure device. In addition, the current in the spark gap is smaller than in the primary winding of the transformer, in many times, how much the number of turns of the secondary winding of the transformer is greater than the number of turns of the primary winding. The current in the spark gap in internal combustion engines thus less than in the primary winding, approximately 100 times.
A desired increase spark energy can be achieved by direct discharge (not transformer) accumulated in the capacitor energy in the ionized spark gap. The use of direct discharge in the spark gap is known through the use of third-ionizing electrode, for example in devices that form the flash. However, the application of ionizing electrode is not always valid, especially when using spark high power. During operation of internal combustion engines the third ionisation electrode is not used, which is probably related with the complexity of the design of the candle and the actual device because of the need for additional wires and high temperatures in the cylinders. But if it would be possible to use ionizing electrode, obviously the emergence of additional problems. When in the Mitigation can be achieved by increasing the time of actual discharge. Without the specified mitigation, i.e., when the hard discharge comes a rapid destruction of the capacitor, and therefore, becomes unreliable operation of the entire device. In the present invention for the formation of sparks used the direct discharge with the appropriate solution to mitigate it with the exception of the third ionizing electrode. Thus, the transformer combines ionizing and power functions. Because the energy radiated interference depends on the voltage in the circuits of the discharge, the direct discharge of the capacitor when the voltage across two orders of magnitude smaller than existing devices, ignition, reduces interference to a level that does not require special measures to combat them.
A device that implements the present invention shown in Fig.1.
The current source 1 is connected in series United key 2, the primary winding 3 enhancing pulse transformer 4 and the capacitor 5. Parallel to the primary winding 3 of a transformer 4 and the capacitor 5 switch 6. With the secondary winding 7 of the transformer 4 are connected to the electrodes 8 and 9 of the spark gap 10.
In series with the secondary winding 7 of the transformer 4 is connected to the capacitor drive 11. To the second current source).
In Fig.2 depicts a device having a separate charging device 13 (all other positions of Fig.2 the same names and numbering of the positions of Fig.1), through which the key is connected to the capacitor drive 11.
The device of spark ignition of the fuel mixture according to the present invention operates as follows. The device is essentially cyclical in three phases in each cycle. Consider the operation of the device shown in Fig.1. In the first phase at the bottom of the keys 2 and 12. Thus the capacitors 5 and 11 are charged to the full voltage of the source 1. In the second phase of the keys 2 and 12 unlock. In the third phase at the bottom of the key 6. The capacitor 5 is discharged through the key 6 and the primary winding 3 a step-up transformer 4. In accordance with the transformation ratio in the secondary winding 7 of the transformer 4 inductives the high-voltage impulse, the ability to break the spark gap 10 between the electrodes 8 and 9. The resulting spark ionizes spark gap 10, creating a circuit for capacitor discharge drive 11 through the secondary winding of the transformer.
There is a discharge of the capacitor of the memory 11 in the spark gap 10. The inductance of the secondary winding 7 of the transformer 4 outline is adequate Fig.2, goes well. The only difference lies in the fact that the capacitor 11 is charged a separate charger 13.
As keys 2 and 12 when the constant current source can be used thyristors, transistors, relay contacts. When the AC power source as keys 2 and 12 use diodes. As the key 6 may be applied to the thyristor, transistor, relay contacts or the contacts of the manual switch.
Since the capacitor discharge drive creates a transformer constant component of the magnetic flux in the core, the latter should have a gap, accelerating the demagnetization of the core during the pause between cycles of discharge. The volume of the transformer core must meet the discharge power, depending on the capacity of the capacitor 11, the voltage and frequency of periods of “charge-discharge”. The proposed device allows you to receive discharge capacity of tens of kW and average power in units of kW and at a frequency of cycles of discharge in tens of Hz, which may be necessary for the ignition of a powerful energy burners and firing of the rocket engines in short-term mode, and when used in installations electro-shock in the long mode. In engines tens of watts.
The device of spark ignition of the fuel mixture, comprising sequentially connected to the power source key, the primary winding of the boost pulse transformer and a capacitor mounted in parallel to the primary winding and the capacitor key and United with the secondary winding of the step-up transformer to the electrodes of the spark gap, characterized in that in series with a secondary winding connected to the capacitor drive connected through the switch with the power source or a separate charger.
FIELD: transport engineering; electronic ignition system.
SUBSTANCE: invention relates to electronic ignition systems with capacitive energy storages. According to invention, multispark electronic ignition is provided by device containing electric breaker contacts, inductance coil, variator, self-excited oscillator built around bipolar transmistor, rectifier energy storage, diode and thyristor switches, thyristor switch control circuit and starting circuit and contact chatter protection circuit. At supply of car system voltage, self-excited oscillator is started and attains self-oscillation mode of operation. Voltage within the limits of 390 V is removed from secondary winding of self-excited oscillator and through rectifier said voltage charges capacitive storage. Diode and thyristor switches provide oscillatory process of discharging of energy storage through primary winding of inductance coil, and spark forming oscillating voltage is obtained at secondary winding.
EFFECT: provision of reliable sparking at changes of supply voltage within wide range, provision of multispark operation owing to multiperiod oscillatory discharge of reservoir capacitor.
3 cl, 1 dwg
FIELD: technology for producing electric equipment used in aircrafts, in particular ignition device of aviation gas-turbine engines and liquid rocket engines, possible use for manufacturing products with usage of foamed plastics facing increased heat resistance and heat requirements.
SUBSTANCE: during production of electric equipment encased in packed or sealed cover, internal hollow of electric equipment cover is filled with fine-dispersed foamed plastic powder, cover is aged under increased temperature during the time, sufficient for foaming and solidification of foamed plastic, cover with electric equipment elements and solidified foamed plastic located within is cooled down, packed or sealed with installation of structural lid. In accordance to invention, cover with foamed plastic is aged at increased temperature and then cooled down, both under excessive pressure of gaseous substance surrounding the cover being heated.
EFFECT: increased heat resistance and strength of electric equipment encased in packed or sealed cover.
SUBSTANCE: invention relates to field of transport and can be used for combustible mixtures ignition by means of electric spark, in particular in capacitive ignition systems for ignition system control, installed on aircraft engine, for ignition system technical condition evaluation in intervals between aircraft engines start-ups. Aircraft engines capacitive ignition system control device includes discharge current sensor, comparator, discharge current amplitude voltage check value setting device, time interval meter, actuator. Discharge current sensor output is connected to comparator first input, discharge current amplitude voltage check value setting device output is connected to comparator second input. Time interval meter output is connected to actuator. Control device additionally includes ambient environment pressure measuring transducer, containing serially connected ambient environment pressure sensor, amplifier, ambient environment pressure control voltage setting device, second comparator, univibrator, logical device "AND". Ambient environment pressure measuring transducer output is connected to second comparator first input. Ambient environment pressure control voltage setting device output is connected to second comparator second input, comparator output is connected to univibrator input, which output and second comparator output is connected to logical device "AND", by output connected to time interval meter input.
EFFECT: technical result is increasing of aircraft engines capacitive ignition system serviceability control reliability.
1 cl, 1 dwg