The ignition system of internal combustion engines

 

(57) Abstract:

The invention relates to the automotive industry, namely, to ignition systems in vehicles with internal combustion engines, and helps to ensure reliable starting of the engine, to reduce the dependence of the reliability of the engine from the leakage voltage and the state of the gap in the spark. The ignition system includes a power source, an ignition coil, an angle sensor, the power amplification and generation of the control signal, the switching element block feedback voltage Converter that is installed after the power source and connected with the storage element forming with the primary winding of the ignition coil through the switching element oscillating circuit for half-wave direct chain of overcharging, forming with the primary winding of the ignition coil and the cumulative element of a closed oscillatory circuit current reverse half-wave, with unit gain and provide a control signal made of separate interconnected schema-matching and schema formation, the second input of which is connected to the unit feedback. 2 Il.

The invention relates to Avtomobilist the x2">

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 secondary winding of the ignition coil generates a high voltage, the magnitude of which is proportional to the amount of energy stored in the ignition coil during current flow. A disadvantage of the classical system is that with increasing engine speed, the amount of stored energy in the ignition coil is reduced, because the amount of current flowing through the primary winding at the time of disconnection is reduced and depends on the source voltage, resulting in reduced power of the spark discharges when the engine is running. In addition, the use of transistors as switching elements causes insufficient slew rate of the high-voltage pulse, and low reliability when possible breakdown voltage value and the failure of the switching element.

Known ignition system of internal combustion engine, comprising a power source, an ignition coil, the savings element, and the unit pulse shaping, see patent N 2069791, 1996 to the closest technical solution is the ignition system according to the patent N 2004835, 1992, CL F 02 P 15/00, including the power source, an ignition coil, a switching element, a signal amplifying and shaping the signals and block feedback signal.

The technical task of the present invention is to provide a powerful managed for the duration of the process sparking, ensuring stable and 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 improves the environment by reducing emissions of harmful toxic gases.

The technical problem is achieved by the fact that the ignition system of an internal combustion engine, containing a power source, an ignition coil with primary and secondary windings, the angle sensor, the power amplification and generation of the control signal, the switching element and actuator feedback additionally established after the power supply voltage Converter connected with the storage element forming with the primary winding of the ignition coil through the switching element celebate cumulative element of a closed oscillatory circuit current reverse half-wave, in this unit gain and provide a control signal made of separate interconnected schema-matching and schema formation, the second input of which is connected to the actuator feedback, the voltage Converter configured to provide stabilization of the output voltage regardless of the ambient temperature and supply voltage.

In Fig. 1 presents a functional diagram of the ignition system of the internal combustion engine of Fig. 2 - circuit overcharge (an example of one of the possible options).

The ignition system includes a power source 1, set behind the Converter 2 output voltage thermal stabilization mode and the output voltage, which is connected with the storage element 3. Cumulative element 3 one output connecting wire 4 is connected with the primary winding of the ignition coil 5, and the other output through the switching element 6 as with the primary winding of the ignition coil 5, thus forming a closed oscillatory circuit current iAvedirect half.

The voltage Converter 2 is made with the possibility of stabilizing the output voltage of the driver is correctly put the chain 7 overcharging cumulative element 3, forming the primary winding of the ignition coil 5 and the cumulative element 3 a closed oscillatory circuit current iarr.the opposite half.

In the simplest embodiment, the circuit overcharge can have only one semiconductor diode 13, creating a path for the flow of current iarr.overcharging the opposite half wave of the oscillation process. Because depending on type switching element and the duration of the control pulse continuity oscillatory process without a separate chain of overcharging can be difficult.

The voltage Converter ignition system must give a sufficiently stable output voltage in the starting mode at low voltages and temperatures. At rated voltage and maximum revs high voltage Converter can be reduced, because the power of the spark and its duration should be reduced by increasing the velocity of gas compression and heating of the air mixture, and reducing the time of combustion. Based on these requirements, the Converter can be performed, for example, on the basis of the blocking generator or push-pull transformer converters with thermocompensation e.g. the signals in the ignition system is made of two interconnected self-schemas: schema-matching 9 and the circuit-formation 10.

In the proposed system the ignition unit 11 feedback is configured to adjust the duration of the signal and its input is connected at point a with connection wire 4, and the output - circuit formation 10.

Pattern-matching 9 block 8 of amplification and generation of signals connected to the sensor 12 of the angle of rotation. To the circuit-formation 10 may be connected to the sensor anti-theft device (not shown).

The ignition system operates as follows. From the power source 1 starts Converter 2 voltage to ensure stable output voltage, charging of the cumulative element 3. When the engine is running with parametric sensor 12 angle synchronous speed of the motor shaft (not shown) receives the electrical signal on the schema-matching 9 block 8 amplification and generation of the control signal, which provides the coordination and pre-amplification of an electrical signal and transmits the circuit-formation 10, where conversion is performed, the summation and amplification of an electrical signal to the amplitudes and shapes required for reliable starting of the switching element 6. Cumulative element 3 sovmescheny.spalnya circuit, forming a decaying oscillatory process. The signal from the parametric sensor 12 angle starts switching element 6, forming the primary sparks. Appearance of electric process oscillatory circuit through the circuit block 11 feedback also connected to the oscillatory circuit sends a signal to the second input of the circuit-formation 10 and thus re-cycled starts switching element 6, i.e., continuously forming a decaying oscillatory process. The duration of the oscillatory process is determined by the control unit 11 of feedback. Circuit 7 overcharging cumulative element 3 provides the possibility of the existence of intrinsically oscillatory process, which is due to more complete discharge of the cumulative element 3 provides a significant increase in the duration and the discharge power.

Increase the duration and power of 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 and poisonous gases into the atmosphere. In addition, in the proposed system, an alternating current flowing through Swersey electrodes, reducing the term of their service that violates the stable operation of the engine, resulting in deterioration of its environmental performance.

The proposed ignition system by reducing front of sparks, increase and duration of the discharge helps ensure reliable starting of the engine under almost any weather conditions, reducing the dependence of the reliability of the engine from leaking voltage, and 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, which in turn improves the economic and environmental characteristics of the engine. The proposed ignition system are not critical to the use of low resistance and high resistance ignition coils.

The ignition system of an internal combustion engine, containing a power source, an ignition coil with primary and secondary windings, the angle sensor, the power amplification and generation of the control signal, the switching element and actuator feedback, characterized in that the ignition system is additionally established after the power source be Gania through switching element oscillating circuit for half-wave direct, and the chain of overcharging, forming a primary winding of the ignition coil and the cumulative element of a closed oscillatory circuit current reverse half-wave, with unit gain and provide a control signal made of separate interconnected schema-matching and schema formation, the second input of which is connected to the actuator feedback, which is arranged to control the operation of the switching element, and a voltage Converter configured to provide stabilization of the output voltage regardless of the ambient temperature and supply voltage.

 

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