Method of and device for stabilized multispark electronic ignition

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

 

The invention relates to systems of spark ignition with capacitive energy storage.

The known method of the spark plugs without subsequent accumulation of energy with induction conversion of electrical energy, which consists in converting electrical energy to low voltage by means of the induction coil. When opening, the electrical contacts of the circuit breaker in the primary winding of the induction coil is formed of a positive pulse with an amplitude of about 300 C. the Changing magnetic field of the primary winding crosses the coils of the secondary winding and induces in it an EMF order 20000-24000 Century the Distributor in turn brings the high voltage current to the wires of the spark between the electrodes of the spark discharge occurs.

A device for implementing this method, containing the electrical contacts of the circuit breaker, the coil inductance with the primary and secondary windings and the variator. When closed electrical contacts, the current flows from the power source through a regulator to limit the current and primary winding of the induction coil. When opening, the electrical contacts of the circuit breaker in the primary winding of the induction coil is formed of a positive pulse with an amplitude of about 300 C. the Changing magnetic field of the primary winding crosses the coils of the WTO the primary winding and induces in it an EMF value 20000-24000 Century The distributor in turn brings the high voltage current to the wires of the spark between the electrodes of the spark discharge occurs [1].

The disadvantage of the described method and device dependence is sparking from the supply voltage on-Board network, the unidirectionality of spark, lack of reliability sparking, which leads to unstable operation of the cold engine, incomplete combustion of a rich mixture when the engine warms up, the complicated start a warm engine.

An object of the invention is to provide a reliable sparking when changing the power supply in wide ranges and ensuring multi-strike mode due to the multi-period oscillatory discharge storage capacitor.

The essence of the invention or the solution of the technical problem is that the method is stable multispark electronic ignition on-Board network, consisting in the conversion of electrical energy to the low voltage electricity, high voltage, when the supply of the on-Board voltage trigger oscillator and make the transition into self-oscillation mode, with the secondary winding of the oscillator relieve tension in the range of 390, which through rectifier charges the capacitive drive electrogene the GII, and with the help of diode and thyristor key provide an oscillatory process of discharge of the energy storage device through the primary winding of the induction coil, the secondary winding of the receive sparkle-forming voltage of the oscillating type.

The method is implemented on the device stable multispark electronic ignition, containing the electrical contacts of the circuit breaker, the coil inductance with the primary and secondary windings and the variator, which additionally has an oscillator made on the bipolar transistor with high gain current (750), rectifier, power storage, an induction coil, a diode key, electronic key, the control circuit of the thyristor key and the drive circuit and protection against contact bounce.

In comparison with the prototype of the inventive method and device of the multi-strike ignition have the following salient features.

The method of forming the voltage on the primary winding of the induction coil using oscillator; managing cumulative discharge of the capacitor.

The device oscillator with a wide range of variation of the supply voltage, is performed on the bipolar transistor with high gain current (750); rectifier; drive e is truenergy; induction coil; a diode key; thyristor key; the control circuit of the thyristor key; the drive circuit and protection against contact bounce.

The drawing shows a diagram of the device stable multispark electronic ignition.

The description of the device and its operation.

When power on-Board network on the device stable multispark electronic ignition starts the oscillator 1 and the transition in the mode of self-oscillations. For a more reliable running oscillator 1 and the stable operation is applied bipolar transistor of opposite conductivity with a large static current transfer ratio (h21). With the secondary winding of the oscillator is taken high voltage through the rectifier unit 2 is supplied to the energy storage device 3. At the opening of the breaker contacts, the start circuit 8 outputs a signal to turn on the thyristor 5 key. Thyristor key 5 is opened and connects the energy storage device 3 to the primary winding of the induction coil 6. The energy accumulator 3 and the primary winding of the induction coil 6 form a resonant circuit. Gradually decreasing the amount of current through the winding at the end of the first quarter of the period has a maximum value, and the voltage at the energy storage device 3 at this point in time is zero. All the energy of the drive 3 (less the Ohm heat loss) is converted into the magnetic field of the induction coil 6, that is, trying to preserve the value and direction of the current, begins to recharge the energy storage device 3 through the open thyristor key 5. As a result, by the end of the second quarter period of the current and the magnetic field of the induction coil 6 is equal to zero, and the drive 3 is charged up to 85% (voltage) from baseline with the opposite polarity. With current termination and change of polarity on the energy accumulator 3 thyristor key 5 closes and opens diode 4 key. Start another process of discharging of the energy accumulator 3 through the primary winding of the induction coil 6, the direction of the current through which is the opposite. At the end of the period of oscillation of the energy accumulator 3 is charged in the original polarity to a voltage equal to 70% of the original. In this time of thyristor key 5 and a diode key 4 are closed. The voltage of the energy accumulator 3 through the ignition coil 6 is supplied to a control circuit 7, which generates an enable signal to the thyristor 5 key. Thyristor key 5 is opened and the entire process described above is repeated. The process is repeated as long as the drive 3, losing in each cycle of approximately 25% of the energy is discharged almost completely. The frequency of the oscillating circuit is about 3.5 kHz, which allows you to get a spark with a series of 7-9 samostoyatelnuyu. Such alternating spark discharge promotes efficient combustion of the working mixture with minimal erosion of candles that differs from a simple extension aperiodic discharge induction drive. The accuracy of the energy in the drive when the supply voltage from 5.5 V to 15 V and a frequency of sparking 20 Hz - not less than 5%.

Sources of information

1. Softelegance, Vpolicy, Cssential. "Design and operation of the car "Moskvich" and "Zhiguli". Ed. The DOSAAF USSR, 1985, P.77-86.

1. How stable multispark electronic ignition, based on the conversion of electric energy low-voltage electricity, high voltage, wherein when applying the on-Board voltage trigger oscillator and make the transition into self-oscillation mode, with the secondary winding of the oscillator relieve tension in the range of 390, which through rectifier charges the capacitive power storage, and with the help of diode and thyristor key provide an oscillatory process of discharge of the energy storage device through the primary winding of the induction coil, the secondary winding of the receive screenresolution voltage of the oscillating type.

2. Device for stable electron multi-strike is wow ignition, containing the electrical contacts of the circuit breaker, the coil inductance with the primary and secondary windings and the variator, characterized in that it further has an oscillator made on the bipolar transistor with high gain current (750), which through rectifier energizes the drive power, and a diode key, electronic key, the control circuit of the thyristor key and the drive circuit and protection against contact bounce provide an oscillatory process of discharge of the energy storage device through the induction coil.



 

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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.

1 dwg

FIELD: transport.

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

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