RU198504U1 - Capacitor Ignition Module on Complementary Transistors - Google Patents

Abstract

The utility model relates to condenser ignition systems for internal combustion engines. The capacitor ignition module on complementary transistors for the internal combustion engine contains the first terminal for connecting to the positive terminal + E of the vehicle on-board network, the second terminal for connecting to the negative -E terminal of the vehicle's on-board network; the first and second output terminals for connection to the terminals of the primary winding of the ignition coil, a pulse voltage converter, a pulse shaper, a diode, a capacitor and a switch. New is the introduction of the second key, the input of which is connected to the second plate of the capacitor, and the output is connected to the second information input of the first key, the output of which is connected to the information input of the second key.

Description

The utility model relates to automotive electronics, in particular to capacitor ignition systems, and can be used in ignition systems of internal combustion engines to increase the efficiency of ignition and combustion of an air-fuel mixture in an internal combustion engine, including during its start-up and operation on all modes.

A known ignition device for an internal combustion engine (US Pat. US No. 4688538, IPC F02P 3/08, publ. 07/25/1987), containing a pulse voltage converter, the first input of which is connected to the first input of the pulse shaper and the first terminal of the ignition device for the internal combustion engine to connect to the positive terminal + E of the car's on-board network, the second inputs of the pulse voltage converter and the pulse former are connected to the second terminal of the ignition device for the internal combustion engine to connect to the negative –E terminal of the car's on-board network, the output of the pulse former is connected to the information input of the key, input which is connected to the output of the pulse voltage converter and the first plate of the capacitor, the second plate of which is connected to the first output terminal of the ignition device for an internal combustion engine, to connect to one of the terminals of the primary winding of the ignition coil, the second output press of the ignition device for connection to the second terminal of the primary winding of the ignition coil is connected to the key output, the second terminal of the ignition device for an internal combustion engine, and through a diode to the second output of the pulse voltage converter.

The disadvantage of the known ignition system is the small amplitude of the bipolar inductive phase of the spark discharge with a duration not exceeding 0.3 ms, which is negatively manifested when starting the engine and operating at idle.

A known ignition device for an internal combustion engine (US Pat. No. 5404859, IPC F02P 3/08, publ. 11.04.1995), containing a pulse voltage converter, the first input of which is connected to the first input of the pulse shaper and the first terminal of the ignition device for the internal combustion engine , for connection to the positive terminal + E of the vehicle on-board network, the second inputs of the pulse voltage converter and the pulse shaper are connected to the second terminal of the ignition device for the internal combustion engine, for connection to the negative –E terminal of the vehicle on-board network, the first output of the pulse former is connected to the information input key and the information input of the pulse voltage converter, the output of which is connected to the first plate of the capacitor, the second plate of which is connected to the anode of the first diode and the first output terminal of the ignition device for an internal combustion engine, to be connected to one of the terminals primarily th winding of the ignition coil, the second output terminal of the ignition device, for connection to the second terminal of the primary winding of the ignition coil, is connected to the cathode of the first diode and to the output of the key, the second terminal of the ignition device for an internal combustion engine, and through the second diode to the second output of the pulse voltage converter ...

The disadvantage of this ignition system is the small amplitude of the unipolar inductive phase of the spark discharge, with a duration not exceeding 0.6 ms, which is negatively manifested when starting the engine and operating at idle.

The closest to the utility model is an ignition system for internal combustion engines (US Pat. No. 5074274, IPC F02P3 / 04, publ. 02.21.1991), containing a pulse voltage converter, the first input of which is connected to the first input of the pulse shaper and the first terminal of the ignition system for an internal combustion engine, for connection to the positive terminal + E of the car's on-board network, the second inputs of the pulse voltage converter and pulse generator are connected to the second terminal of the ignition system for the internal combustion engine, for connecting to the negative –E terminal of the car's on-board network, the first output of the pulse former connected to the information input of the pulse voltage converter, the first output of which is connected through the first diode to the input of the key and to one of the plates of the storage capacitor, the second plate of which is connected to the anode of the second diode and to one of the output terminals of the ignition system for the internal engine about combustion for connection to one of the terminals of the primary winding of the ignition coil, the second output terminal of the ignition system for an internal combustion engine, for connection to the second of the terminals of the primary winding of the coil is connected to the cathode of the second diode, the second output of the pulse voltage converter, the second terminal of the ignition system for the engine internal combustion and the output of the key, the control input of which is connected to the second output of the pulse former.

The disadvantage of this ignition device for an internal combustion engine, like the previous ones, is the short duration of the unipolar inductive component of the spark discharge, not exceeding 0.6 ms, and, accordingly, the low reliability of arson in various operating modes of internal combustion engines and various alternative types of fuel under normal and powerful modes.

The problem to be solved by the claimed utility model is to create a capacitor ignition module based on complementary transistors for internal combustion engines with increased duration and power of the spark discharge.

The technical result is an increase in the reliability of the ignition of the air-fuel mixture at various operating modes of internal combustion engines and various alternative fuels under normal and powerful modes.

The technical result is achieved due to the fact that in the capacitor ignition module on complementary transistors for internal combustion engines, containing a pulse voltage converter, the first input of which is connected to the first input of the pulse shaper and the first terminal of the capacitor ignition module on complementary transistors for connection to the positive terminal + E the vehicle on-board network, the second input of the pulse voltage converter and the second input of the pulse former are connected to the second terminal of the capacitor ignition module on complementary transistors for connection to the negative –E terminal of the vehicle electrical system, the first and second outputs of the pulse former are connected, respectively, to the information input of the pulse converter voltage and the first information input of the key, the first output of the pulse voltage converter is connected to the first plate of the storage capacitor, the first input of the key and the third output a pulse former, the second plate of the storage capacitor is connected to the first output terminal of the capacitor ignition module on complementary transistors, to connect to one of the terminals of the primary winding of the ignition coil, the second output terminal of the capacitor ignition module on complementary transistors, to connect to the second of the terminals of the primary winding of the ignition coil , connected to the output of the key, the second terminal of the capacitor ignition module on complementary transistors and through a reverse-connected diode with the second output of the pulse voltage converter, while the second key is introduced, the input of which is connected to the second plate of the storage capacitor, and the output to the second information input of the first key , the output of which is connected to the information input of the second key.

The capacitor ignition module on complementary transistors is characterized by the fact that the first switch contains an N-channel transistor, the source of which is connected to the anode of the zener diode, one of the terminals of the first resistor and the input of the switch, the output of which is connected to the drain of the N-channel transistor, the gate of which is connected to the cathode of the zener diode , the second terminal of the first resistor and through the second resistor to the first information input of the key, the second information input of which is connected through the diode and the third resistor to the gate of the N-channel transistor.

The capacitor ignition module on complementary transistors is characterized by the fact that the second switch contains a P-channel transistor, the source of which is connected to the cathode of the zener diode, one of the terminals of the first resistor and the input of the switch, the information input of which is connected through a reverse-connected diode and the second resistor to the anode of the zener diode, the second the terminal of the first resistor and the gate of the P-channel transistor, the drain of which is connected to the output of the key.

The essence of the proposed capacitor ignition module on complementary transistors for internal combustion engines is to increase the amplitude and duration of the current during the formation of the first inductive phase of the spark discharge, by forming the discharge current of the storage capacity through the primary winding of the ignition coil at a given time, and forming the second inductive phase of the spark discharge the opposite direction, by interrupting the discharge current of the storage capacity through the primary winding of the ignition coil at the moment it reaches its maximum value.

The introduction of the second key and its connections with the first key, the pulse shaper and the common bus made it possible to organize a trigger on two complementary transistors, which can be in two stable states - open or closed, which corresponds to the simultaneous flow of current or no current through the transistors.

A feature of this technical solution of the capacitor ignition module on complementary transistors is that when the trigger is triggered at a given moment in time according to a signal from the pulse former, a sharp magnetic flux occurs, formed by the discharge current of the storage capacitor through the primary winding of the ignition coil, which leads to the emergence of EMF in the secondary winding of the ignition coil, the breakdown of the spark gap and the formation of the secondary current of the first high-energy inductive phase of the spark discharge. At the moment of reaching the maximum value of the discharge current of the storage capacitor through the primary winding of the ignition coil or the minimum value of the voltage across the storage capacitor, an avalanche-like switch off of the trigger is formed and, accordingly, the disappearance of the current in the primary winding of the ignition coil. A sharp change in the magnetic flux caused by the disappearance of the current in the primary winding of the ignition coil induces an EMF of the opposite sign in the secondary winding of the ignition coil, relative to the EMF in the secondary winding when the trigger is turned on, which leads, respectively, to a repeated breakdown of the spark gap of the spark plug and a change in the direction of the secondary current the second inductive phase of the spark discharge.

The second inductive phase of the secondary current of the spark discharge, due only to the parameters of the secondary circuit of the ignition coil, regardless of the parameters of the open primary circuit, ensures effective maintenance of the combustion process of the air-fuel mixture, since has a significantly longer duration at a lower current amplitude as compared to the first high-energy inductive phase of the secondary spark discharge current, but exceeds the energy parameters of the inductive phase of the spark discharge of traditional transistor ignition modules.

FIG. 1 shows a block diagram of a capacitor ignition module on complementary transistors for internal combustion engines, containing the first terminal 1 of the capacitor ignition module on complementary transistors for connection to the positive terminal + E of the vehicle's on-board network, the second terminal 2 of the capacitor ignition module on complementary transistors for connection to the negative -E terminal of the vehicle's on-board network, a pulse voltage converter 3, a pulse shaper 4, a diode 5, a storage capacitor 6, the first key 7, the second key 8, output terminals 9 and 10, respectively, of the capacitor ignition module on complementary transistors, for connection, respectively , to the first and second of the terminals of the primary winding 11 of the ignition coil 12 (Fig. 3 and Fig. 4).

FIG. 2 shows a block diagram of a capacitor ignition module on complementary transistors for internal combustion engines, containing a pulse voltage converter 3, the first 3-1 input of which is connected to the first 4-1 input of the pulse shaper 4 and the first 1 terminal of the capacitor ignition module on complementary transistors for connection to positive terminal + E of the vehicle on-board network, the second input 3-2 of the pulse voltage converter 3 and the second input 4-2 of the pulse former 4 are connected to the second terminal 2 of the capacitor ignition module on complementary transistors to connect to the negative –E terminal of the vehicle's on-board network, the first 4 -3 and the second 4-4 outputs of the pulse shaper 4 are connected, respectively, to the information input 3-3 of the voltage pulse converter 3 and the first information input 7-1 of the key 7, the first output 3-4 of the pulse voltage converter 3 is connected to the first plate of the storage capacitor 6, in ode 7-2 of key 7 and the third output 4-5 of the pulse shaper 4, the second plate of the storage capacitor 6 is connected to the first output terminal 9 of the capacitor ignition module on complementary transistors, to be connected to one of the terminals of the primary winding of the ignition coil, the second output terminal 10 of the capacitor Ignition module on complementary transistors, for connection to the second of the terminals of the primary winding of the ignition coil, it is connected to the output 7-3 of the key 7, the second terminal 2 of the capacitor ignition module on complementary transistors and through the reversely connected diode 5 with the second output 3-5 of the pulse voltage converter 3 , and the input 8-1 of the second key 8 is connected to the second plate of the storage capacitor 6, and the output 8-3 is connected to the second information input 7-4 of the first key 7, the output 7-3 of which is connected to the information input 8-2 of the second key 8. To outputs 3-4 and 3-5 of the pulse voltage converter 3 are connected to the output winding 3-6 pulse transformer 3-7, input windings 3-8 and 3-9 of which are connected to the control unit 3-10 of the pulse voltage converter 3.

In FIG. 2 also shows the internal connections of the first 7 and second 8 keys.

The first switch 7 contains an N-channel transistor 7-5, the source of which is connected to the anode of the zener diode 7-6, one of the terminals of the first resistor 7-7 and the first input 7-2 of the switch 7, the output 7-3 of which is connected to the drain of the N-channel transistor 7-5, the gate of which is connected to the cathode of the zener diode 7-6 to the second terminal of the first resistor 7-7 and through the second resistor 7-8 to the first information input 7-1 of the key 7, the second information input 7-4 of which is connected through the diode 7 -9 and the third resistor 7-10 with the gate of the N-channel transistor 7-5.

The second key 8 contains a P-channel transistor 8-4, the source of which is connected to the cathode of the zener diode 8-5, one of the terminals of the first resistor 8-6 and the input 8-1 of the key 8, the information input 8-2 of which is connected through a reverse-connected diode 8 -8 and the second resistor 8-7 to the anode of the zener diode 8-5, the second terminal of the first resistor 8-6 and the gate of the P-channel transistor 8-4, the drain of which is connected to the output 8-3 of the key 8.

FIG. 3 and FIG. 4 shows the schematic diagrams of one-lead and two-lead ignition coils, where: 11 and 13, respectively, the primary and secondary windings of the ignition coil 12, the spark gap 14 of the spark plug.

FIG. 5 shows a schematic diagram of a pulse generator, which is controlled, for example, from a Hall sensor or from a microprocessor-based ignition control system, with appropriate synchronization from the crankshaft (camshaft) of the internal combustion engine.

FIG. 6 to FIG. 9 shows the timing diagrams of the operation of the pulse shaper 4 with the Hall sensor.

FIG. 6 shows a timing diagram of the voltage across the Hall sensor (not shown), at the input 4-6 of the key 4 and, accordingly, at the gate of the transistor 4-7.

FIG. 7 shows a timing diagram of the voltage drop across diode 4-8, connected to the cathode and the control electrode of the SCR 4-9, relative to the anode of the diode 4-8, which, when current flows through the diode 4-8, the closing potential on the control electrode of the triristor 4-9 ...

In FIG. 8 shows a timing diagram of the voltage across the capacitor 4-10 relative to the anode of the diode 4-8.

FIG. 9 shows a timing diagram of the voltage at terminal 4-4 relative to terminal 4-5 of the pulse shaper 4, formed by the secondary winding 4-11 of the pulse transformer 4-12, which opens the transistor 7-5 of the first key 7. Positive pulse, at the moment of closing the transistor 4-7 , from the output 4-3 relative to the terminal 4-2 of the pulse shaper 4 is fed to the input 3-3 of the pulse voltage converter 3 and turns it off for the duration of the resonant discharge of the capacitor 6 through the primary 11 winding of the ignition coil 12 (Fig. 3 and Fig. 4).

FIG. 10 to FIG. 15 shows the timing diagrams of the operation of the capacitor ignition module on complementary transistors.

FIG. 10 shows a starting voltage pulse of positive polarity at the input 7-1 relative to the output 7-2 from the output of the pulse shaper 4.

FIG. 11, Fig. 12 and FIG. 13 shows, respectively, the voltages across the capacitor 6 at the output terminal 9 relative to the output terminal 10 of the capacitor ignition module on complementary transistors and the current through the primary winding 11 of the ignition coil 12.

FIG. 14, Fig. 15 shows, respectively, the voltage drop and the spark discharge current in the gap 14 of the spark plug (FIG. 3 and FIG. 4).

Consider the operation of the pulse shaper shown in FIG. five.

Initial state: transistor 4-7 is open and current flows through the circuit from the energy source of the on-board network + E through terminal 1 of the capacitor ignition module on complementary transistors, terminal 4-1 of the pulse shaper 4, resistor 4-13, transistor 4-7, terminal 4 -2, common terminal 2. And also, current flows from the energy source of the on-board network + E along the next circuit: terminal 1, terminal 4-1 of the pulse shaper 4, zener diode 4-14, diode 4-8, resistor 4-15 (determines minimum charging time of the capacitor 4-10), transistor 4-7, terminal 4-2, common terminal 2 of the capacitor ignition module on complementary transistors. Capacitor 4-10 is charged to a voltage equal to the stabilization voltage of the Zener diode 4-14.

At the time t0, t2, t4 (Fig. 6), the transistor 4-7 closes on the signal of the control circuit 4-6, and the voltage of the capacitor 4-10 is applied to the diode 4-8 in reverse polarity, and the diode 4-8 closes, and this voltage is applied to the control electrode of the thyristor 4-9 in the forward direction, and it opens. The voltage from the capacitor 4-10 is applied to the cathode of diode 4-8 relative to its anode along the circuit: the upper plate of the capacitor 4-10, resistor 4-13, diode 4-16, diode cathode 4-8. The current through the control electrode of the SCR 4-9 flows through the circuit: the upper plate of the capacitor 4-10, the resistor 4-13 (the resistance value of which determines the control current of the SCR 4-9), the diode 4-16, the control electrode of the SCR 4-9, the SCR cathode 4-9, the bottom plate of the capacitor 4-10. The amplitude of the voltage of the positive pulse at the cathode of the diode 4-8 and at the control electrode of the SCR 4-9 is determined by the response voltage of the control electrode of the SCR 4-9. The voltage of the charged capacitor 4-10 is applied to the primary winding 4-17 of the pulse transformer 4-12 (Fig. 8). Capacitor 4-10 within 100-200 μs is discharged to the primary winding 4-17 of pulse transformer 4-12 and a positive start pulse is formed on the secondary winding 4-11 (Fig. 9) with a duration of at least 50 μs, arriving at the output 4-4 key 4 through diode 4-18.

The amplitude value of the voltage and current of the triggering pulses for the capacitor ignition module on complementary transistors depends on the capacitance of the capacitor 4-10, the voltage of the energy source of the vehicle's on-board network, the transformation ratio of the pulse transformer 4-12, the stabilization voltage of the Zener diode 4-14 and the resistance of the electronic resistor 4-13 key 7.

When the transistor 4-7 is turned on (Fig. 6, from the time t1, t3), the charge of the capacitor 4-10 (Fig. 8) is formed up to the specified voltage value, i.e. up to the stabilization voltage of the zener diode 4-14, and is carried out in at least 2 ms at the maximum value of the voltage of the energy source of the vehicle's on-board network (13.8-14.4V). In the event of impulse noise in the on-board network of the car with an open transistor 4-7, the electronic key 4 does not start, because a negative (closing) voltage is applied to the control electrode of the SCR 4-9 in magnitude equal to the voltage drop across the diode 4-8.

In the event of impulse noise in the vehicle's on-board network when the transistor 4-7 is closed, the SCR 4-9 does not start, because capacitor 4-10 is discharged. For stable operation of the SCR 4-9, a 4-19 resistor is installed between the gate electrode and the cathode.

Let us consider the operation of the capacitor ignition module on complementary transistors for internal combustion engines (ICE) using the timing diagrams shown in FIG. 10 to FIG. 15.

When starting and operating the internal combustion engine, the transistor 4-7 (Fig. 5) opens and closes, and at the moment of closing the transistor 4-7 at the output 4-4 relative to the output 4-5 of the shaper 4, a positive start pulse is formed (Fig. 9), which is received (Fig. 10) to the first information input 7-1, relative to the input 7-2 of the first switch 7. Field-effect transistor 7-5 opens, and the positive voltage potential from the second (right) plate of the capacitor 6 (previously charged from the pulse voltage converter 3) , is applied through the output terminal 9, the primary winding 11 of the ignition coil 12, the second output terminal 10 to the output 7-3 of the first switch 7 and, accordingly, the source-drain transition of the field-effect transistor 7-5, the output 7-2 of the first switch 7 relative to the first ( left) of the capacitor plate 6. The current flowing through the primary winding 11 of the ignition coil 12 (Fig. 13) forms an increasing magnetic flux, which leads to the emergence of an EMF (Fig. 14) in the secondary winding 13 of the ignition coil 12, breakdown of the spark gap 14 and the formation of a secondary current (Fig. 15) of the first high-energy inductive phase of the spark discharge.

In addition, a positive voltage is applied from the second (right) plate of the storage capacitor 6, through the input 8-1 of the second key 8 to the gate-source transition of the field-effect transistor 8-4 and then through the resistor 8-7, diode 8-8, information input 8 -2 keys 8, output 7-3 of the first key 7, transition drain - source of field-effect transistor 7-5, input 7-2 of key 7, first (left) plate of capacitor 6. Field-effect transistor 8-4 of key 8 opens, and to the transition gate - the source of the field-effect transistor 7-5 of the first switch 7, a positive voltage of the charged capacitor 6 is applied along the circuit: the second (right) plate of the capacitor 6 input 8-1 of the key 8, the source-drain transition of the field-effect transistor 8-4, output 8-3 of the switch 8 , the second information input 7-4 of the first key 7, the diode 7-10, the resistor 7-9, the gate-source transition of the field-effect transistor 7-5, the input 7-2 of the key 7, the first (left) plate of the capacitor 6. This voltage applied to the source-gate transition of the field-effect transistor 7-5, supports the field-effect transistor 7-5 in the open state, while the trigger pulse from the pulse shaper 4 stops after 50 μs.

Thus, the flip-flop, made up of two switches 7 and 8 with appropriate external connections on two complementary field-effect transistors 7-8 and 8-6, goes into a stable open state. The voltage across the capacitor 6 drops according to the harmonic cosine law (Fig. 12), and the current changes according to the harmonic sine law (Fig. 13). After half the period of the oscillatory process, the voltage across the capacitor reaches a value at which the applied potential to the gate-source junctions of both field-effect transistors cannot keep them open, and the trigger on the complementary transistors 7-5 and 8-4 closes like an avalanche. In this case, the current in the primary winding 11 of the ignition coil 12 abruptly disappears, and, accordingly, the magnetic flux in the primary winding disappears, and a high-voltage voltage pulse of the opposite sign appears in the secondary winding 13 (Fig. 14), a repeated breakdown occurs in the spark gap 14 of the spark plug ... The current through the spark gap 14 (Fig. 15) also reverses its direction, but its duration is significantly longer than the duration of the current in the first phase of the spark discharge and exceeds the traditional duration of transistor ignition systems due to the higher value of the rupture current.

The construction of a capacitor ignition module on complementary transistors according to the proposed scheme provides an increased duration and power of the spark discharge, which leads to an increase in the reliability of the ignition of the air-fuel mixture at various operating modes of internal combustion engines and various alternative types of fuel under normal and powerful modes.

Claims (3)

1. Capacitor ignition module on complementary transistors for internal combustion engines, containing a pulse voltage converter, the first input of which is connected to the first input of the pulse shaper and the first terminal of the capacitor ignition module on complementary transistors for connection to the positive terminal + E of the vehicle's on-board network, the second input of the pulse voltage converter and the second input of the pulse former are connected to the second terminal of the capacitor ignition module on complementary transistors for connection to the negative –E terminal of the vehicle's on-board network, the first and second outputs of the pulse former are connected, respectively, to the information input of the pulse voltage converter and the first information input of the first key , the first output of the pulse voltage converter is connected to the first plate of the storage capacitor, the first input of the first key and the third output of the pulse generator, the second The storage capacitor is connected to the first output terminal of the capacitor ignition module on complementary transistors, to be connected to one of the terminals of the primary winding of the ignition coil, the second output terminal of the capacitor ignition module based on complementary transistors, to be connected to the second of the terminals of the primary winding of the ignition coil, is connected to the output the first key, the second clamp of the capacitor ignition module on complementary transistors and through a back-connected diode with the second output of the pulse voltage converter, characterized in that the second key is introduced, the input of which is connected to the second plate of the storage capacitor, and the output to the second information input of the first key, whose output is connected to the information input of the second key. 2. Capacitor ignition module on complementary transistors according to claim 1, characterized in that the first switch contains an N-channel transistor, the source of which is connected to the anode of the zener diode, one of the terminals of the first resistor and the input of the first switch, the output of which is connected to the drain of the N-channel transistor, the gate of which is connected to the zener diode cathode, the second terminal of the first resistor and through the second resistor to the first information input of the first switch, the second information input of which is connected through the diode and the third resistor to the gate of the N-channel transistor. 3. Capacitor ignition module on complementary transistors according to claim 1, characterized in that the second switch contains a P-channel transistor, the source of which is connected to the cathode of the zener diode, one of the terminals of the first resistor and the input of the second switch, the information input of which is connected through a reverse-connected diode and a second resistor to the anode of the zener diode, the second terminal of the first resistor and the gate of the P-channel transistor, the drain of which is connected to the output of the second switch.

Images