The ignition system of internal combustion engines
(57) Abstract:The invention relates to the automotive industry, particularly to ignition systems in vehicles with internal combustion engines and can simplify the design of the ignition system and to ensure reliable starting of the engine by increasing the capacity and duration of the discharge. The ignition system contains the power supply, voltage Converter, a storage capacitor connected to the primary winding of the ignition coil, and the switching element, forming a resonant circuit, the oscillating circuit is connected block feedback, its output is connected to the amplification device and the signal, the block feedback is arranged to control the operation of the switching element. 1 Il. The invention relates to the automotive industry, namely, to ignition systems in vehicles with internal combustion engine.In classical ignition system when the circuit breaker the current flowing through the primary winding of the ignition coil, increases exponentially. At the time of tripping of the breaker in the second winding of the ignition coil generates the I during the current flow. The disadvantages of the classical system is that when increasing the rotation speed of the engine the amount of energy stored in the ignition coil is reduced, and the amount of current flowing through the primary winding of the ignition coil, depends on the source voltage, resulting in reduced power of the spark discharges, especially when the engine is running.Known ignition system of an internal combustion engine, comprising a power source, an ignition coil, the primary winding of which forms with the capacitive element of the oscillating circuit, and block the formation of pulses whose frequency is equal to or an integer times smaller than the resonance frequency of the circuit, see RF patent N 2069791, 1993, CL F 02 P 15/10. However, the proposed ignition system complicated to perform, as it requires the necessity of introducing an electronic key containing high voltage and low voltage transistors, and an auxiliary pulse shaping. This system is unreliable in operation.The closest technical solution is the ignition system according to the patent of Russian Federation N 2004835, 1992, CL F 02 P 15/00, including ignition coil, a switching element, and the shaper feedback signals.ka. In addition, limited capacity and duration of the spark, which does not ensure reliable starting of the engine.The technical task of the present invention is to simplify the design of the system, obtaining a powerful and long spark formation, ensuring reliable operation of the internal combustion engine regardless of the characteristics of the fuel mixture, climatic conditions, parameters and technical condition of the spark plugs, as well as ensuring more complete combustion of the fuel mixture, which will improve the environment by reducing the inflow into the atmosphere of harmful toxic gases.The technical problem is achieved by the fact that the ignition system containing a power source, an ignition coil with primary and secondary windings, a switching element, a signal amplification and signal conditioning, the angle sensor, additionally established after the power supply voltage Converter connected with the storage capacitor, forming with the primary winding of the ignition coil of the oscillatory circuit, which is connected to the input of the feedback, and the output from the amplification device and the signal, the block feedback is made with a chance to view the topics ignition internal combustion engine.The ignition system includes a power source 1, which is connected through a transformer 2 voltage accumulating capacitor 3, which, in turn, through the wire 4 is connected with the primary winding coil 5 ignition. To the connecting wire 4 is connected block feedback 6, output 7 is associated with the device 8 amplification and shaping of the signals from the sensor 9 of the angle of rotation. With regard to the execution of a block feedback, it is characterized by running them functional significance, can be performed in various ways and is not the defining moment of the invention and characterized the function performed in connection with the difference from the prototype. Block feedback can be accomplished in various ways, for example to enable the trigger.The device 8 amplification and generation of signals through the switching element 10 is connected with the storage capacitor 3. In the ignition system formed resonant circuit comprising a storage capacitor 3, the leads 4, the primary winding coil 5 ignition, the vehicle weight and the switching element 10.The ignition system operates as follows. When Postup is tsya switching element 10, resulting in the oscillatory process, causing the primary sparks. At the same time with the oscillating circuit unit 6 feedback is signal output 7 block 6 feedback starts the device 8 amplification and signal conditioning the specific operation of the switching element 10, which, in turn, maintains the desired duration of decaying oscillatory process in the oscillating circuit 2-3. As an example, we can explain the operation of the unit feedback as follows. Block feedback through the amplification device and signal controls the operation of the switching element by controlling the duration or the number of pulses generated, for example, by a trigger. The duration or the number of control pulses is determined by the parameters of the signals taken from the oscillating circuit and defined, in turn, the characteristics of the oscillating circuit, taking into account the capacity of the drive, the inductance of the ignition coil and q depend on the values submitted resistance (active and reactive component) of the external circuit - high voltage wire, the condition of the spark plugs and characteristics of progenator 3 provides a significant increase in the duration and power of the discharge in the spark plugs.Increase the duration and power of the discharge in the spark plug allows you to create conditions for the stable operation of the engine due to more complete combustion of the fuel mixture with different concentrations, which reduces the emission of harmful gases into the atmosphere. In addition, in the proposed system, an alternating current flowing through the spark plug, prevents the transfer of metal from one electrode to another, which, in turn, reduces the erosion of the electrodes, which reduces their lifespan, which upsets the steady operation of the engine, leading to deterioration of the ecological characteristics of the engine.The proposed ignition system by reducing front of sparks, increase the power and duration of the discharge helps ensure reliable starting of the engine in almost any weather, reduce dependence engine reliability against leakage voltage and the state of the gap in the candlelight.The use of this ignition system provides the ability to use candles with increased interelectrode gap, which allows to obtain the effect of a powerful spray that, in turn, improves the economic and environmental characteristics of the engine. The proposed system sage is jihane internal combustion engines, containing the power source, an ignition coil with primary and secondary windings, a switching element, a signal amplification and signal conditioning, the angle sensor and actuator feedback, characterized in that the ignition system after the power supply inputs of the voltage Converter connected with the storage capacitor, forming with the primary winding of the ignition coil through the switching element oscillating circuit associated with unit feedback, with unit feedback, coupled with its output to the amplification device and signal, configured to control the operation of the switching element.
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