Double-cylinder composite ignition circuit and igniter

Abstract

The invention relates to an ignition circuit, in particular to a double-cylinder combined type ignition circuit and an igniter. Comprising a module connector and a plurality of charging and discharging circuits connected with the module connector, the charging and discharging circuit comprises a control circuit, a power switch circuit and a discharging trigger circuit which are connected with the module connector, and a charging circuit and a discharging circuit which are respectively connected with the power switch circuit and the discharging trigger circuit, and the discharging circuit is connected with the charging circuit and the spark plug; the control circuit receives an ignition driving signal and controls the power switch circuit to boost the power supply voltage, and the boosted power supply voltage charges the charging circuit; the discharge trigger circuit receives the ignition driving signal and controls the discharge circuit to supply power to the spark plug. According to the double-cylinder composite ignition circuit provided by the invention, low input voltage (DC12V) is realized, the single-path ignition energy can reach 120mJ, the requirements of an engine under specific working conditions can be met, and the defect that the discharge ignition energy of a traditional capacitor is small is overcome.

Description

Technical Field

[0001] The present invention relates to an ignition circuit, and more particularly to a dual-cylinder composite ignition circuit and an igniter. Background Art

[0002] Electronic ignition technology is an important support in the fields of national economy and national security, and is also the core of modern internal combustion engine control systems. At present, inductive ignition and capacitor discharge ignition (DC-CDI ignition) are common ignition methods.

[0003] Inductive ignition has a fast ignition speed and strong energy, which is beneficial to the combustion of the air-fuel mixture. However, compared with capacitor discharge ignition, it has poor ignition stability during low-speed and high-speed operation of the engine, and is prone to energy fluctuations or timing deviations, affecting performance.

[0004] Although capacitor discharge ignition technology has improved this deficiency and can provide a relatively stable ignition effect at various speeds. However, due to its relatively small ignition energy, it may be difficult to meet the engine requirements under specific working conditions. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problem that the existing capacitor discharge ignition technology has relatively small ignition energy and may be difficult to meet the engine requirements under specific working conditions, and to provide a dual-cylinder composite ignition circuit and module.

[0006] To solve the above technical problems, the technical solution provided by the present invention is as follows:

[0007] A dual-cylinder composite ignition circuit includes a module connector for providing a power supply voltage and an ignition drive signal, and a plurality of charge and discharge circuits connected to the module connector;

[0008] The charge and discharge circuit includes a control circuit, a power switch circuit, a discharge trigger circuit connected to the module connector, and a charging circuit and a discharge circuit respectively connected to the power switch circuit and the discharge trigger circuit. The discharge circuit is connected to the charging circuit and the spark plug;

[0009] The control circuit receives the ignition drive signal and controls the power switch circuit to boost the power supply voltage. After the power supply voltage is boosted, it charges the charging circuit;

[0010] The discharge trigger circuit receives the ignition drive signal and controls the discharge circuit to supply power to the spark plug.

[0011] Further, the module connector is a J30J-15ZKWP7-J connector;

[0012] The first pin, the second pin, the ninth pin, and the tenth pin of the module connector are 12V power supply terminals;

[0013] The twelfth, thirteenth, fourteenth, and fifteenth pins of the module connector are grounded;

[0014] The fourth and fifth pins of the module connector are both drive signal PWM_IN input terminals.

[0015] Further, the control circuit includes an integrated chip U1;

[0016] The first pin and the fourth pin of the integrated chip U1 are connected, and are grounded through capacitors C1, C2, C4, and C5; the first pin and the fourth pin of the integrated chip U1 are connected to the 12V power supply terminal;

[0017] The second pin of the integrated chip U1 is connected to the 12V power supply terminal through a resistor R9;

[0018] The third pin of the integrated chip U1 is connected to the drive signal PWM_IN input terminal through a resistor R4, and is grounded through a capacitor C9;

[0019] The fifth pin of the integrated chip U1 is grounded;

[0020] The sixth pin of the integrated chip U1 is connected to the power switch circuit and is grounded through a resistor R7;

[0021] The seventh pin of the integrated chip U1 is connected to the power switch circuit;

[0022] The eighth and ninth pins of the integrated chip U1 are connected to the power switch circuit through resistors R2 and R1 respectively;

[0023] The tenth pin of the integrated chip U1 is grounded through a resistor R6 and a capacitor C10.

[0024] Further, the power switch circuit includes a transformer T1, a power switch transistor Q1, rectifier diodes D4, D5, absorption diodes D2, D3, and an anti-reverse diode D1;

[0025] The transformer T1 includes primary windings N1, N2, secondary windings N3, and N4;

[0026] The third pin of the transformer T1 is grounded, and the seventh pin is floating;

[0027] The fifth pin of the primary winding N1 and the fourth pin of the primary winding N2 are connected to the drain of the power switch transistor Q1, the anode of the absorption diode D3, and resistors R1 and R2;

[0028] The source of the power switch transistor Q1 is connected to the sixth pin of the integrated chip U1 and is grounded through a resistor R7, and the gate of the power switch transistor Q1 is connected to the seventh pin of the integrated chip U1;

[0029] The cathode of the absorption diode D3 is connected to the cathode of the absorption diode D2. The anode of the absorption diode D2 is connected to the 12V power supply terminal, the cathode of the anti-reverse diode D1, one end of the capacitors C3 and C6, the first pin of the primary winding N1, and the second pin of the primary winding N2. The other ends of the capacitors C3 and C6 are connected to the anode of the anti-reverse diode D1 and grounded.

[0030] The sixth pin of the secondary winding N3 is connected to the anode of the rectifier diode D4, and the eighth pin is grounded.

[0031] The tenth pin of the secondary winding N4 is connected to the anode of the rectifier diode D5, and the ninth pin is grounded.

[0032] The cathodes of the rectifier diode D4 and the rectifier diode D5 are both connected to the charging circuit.

[0033] Further, the charging circuit includes charging capacitors C7, C8, and C11.

[0034] The charging capacitors C7 and C8 are connected in parallel and then connected in series between the cathode of the rectifier diode D4 and the eighth pin of the secondary winding N3.

[0035] The charging capacitor C11 is connected in series between the cathode of the rectifier diode D5 and the discharging circuit.

[0036] Further, the discharging trigger circuit includes a switching transistor Q2, an optocoupler U2, resistors R10, R12, R13, R14, R17, and capacitors C16, C17.

[0037] The gate of the switching transistor Q2 is connected to one ends of the resistors R14 and R17. The other end of the resistor R14 is connected to the input terminal of the driving signal PWM_IN. The other end of the resistor R17 is connected to the source of the switching transistor Q2 and grounded.

[0038] The drain of the switching transistor Q2 is connected to one end of the resistor R12, one end of the capacitor C16, and the first pin of the optocoupler U2. The other end of the resistor R12 is connected to the 12V power supply terminal, and the other end of the capacitor C16 is grounded.

[0039] The second pin of the optocoupler U2 is grounded.

[0040] The third pin of the optocoupler U2 is connected to the discharging circuit through the resistor R10.

[0041] The fourth pin of the optocoupler U2 is connected to the discharging circuit and grounded through the capacitor C17 and the resistor R13.

[0042] Further, the discharging circuit discharges through a discharging loop after the thyristor S1 is turned on by the discharging trigger circuit 1. The discharging circuit includes a flyback transformer T2 and a thyristor S1.

[0043] The high-voltage coil T2 includes a primary winding NP and a secondary winding NS;

[0044] The charging capacitor C11 is connected in series between the third pin of the primary winding NP and the main terminal 1 of the thyristor S1;

[0045] The fourth pin of the primary winding NP is connected to the eighth pin of the secondary winding N3;

[0046] The first pin of the secondary winding NS is connected to the spark plug, and the second pin is connected to the cathode of the rectifier diode D4.

[0047] Furthermore, series-connected protection resistors R3 and R5 are connected in parallel across both ends of the charging capacitors C7 and C8;

[0048] An anti-interference resistor R11 is connected in parallel across both ends of the charging capacitor C11.

[0049] Furthermore, the transformer T1 is a compact surface-mount high-frequency transformer, and the turns ratio of the primary side to the secondary side is 1:10:65;

[0050] The high-voltage coil T2 is a pin-type vertical high-voltage coil, and the turns ratio of the primary side to the secondary side is 1:100.

[0051] A dual-cylinder compound ignition device includes a housing and a PCB board disposed inside the housing, and an ignition circuit is provided on the PCB board;

[0052] A plurality of spark plug connection pipelines are provided on the housing, and the spark plug connection pipelines connect the ignition circuit on the PCB board to the spark plug.

[0053] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0054] The dual-cylinder compound ignition circuit and ignition device provided by the present invention use a dual-channel ignition drive signal to achieve independent ignition for the dual cylinders. By providing a control circuit, a power switch circuit, and a charging circuit, it is convenient to boost the voltage of the power switch circuit and charge the charging circuit after receiving an external ignition drive signal; meanwhile, the discharge trigger circuit controls the discharge of the discharge circuit after receiving an external ignition drive signal; it realizes a low input voltage (DC12V), and the single-channel ignition energy can reach 120 mJ, which can meet the requirements of the engine under specific working conditions and make up for the deficiency of small ignition energy in traditional capacitor discharge ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a structural block diagram of an embodiment of the dual-cylinder compound ignition circuit of the present invention;

[0056] Figure 2 It is a circuit structure schematic diagram of the charge and discharge circuit in the embodiment of the dual-cylinder compound ignition circuit of the present invention;

[0057] Figure 3 Schematic diagram of the circuit structure of the module connector in the embodiment of the dual-cylinder composite ignition circuit of the present invention;

[0058] Figure 4 Schematic diagram of the circuit structure of the control circuit in the embodiment of the dual-cylinder composite ignition circuit of the present invention;

[0059] Figure 5 Schematic diagram of the circuit structure of the power switch circuit in the embodiment of the dual-cylinder composite ignition circuit of the present invention;

[0060] Figure 6 Schematic diagram of the circuit structure of the discharge trigger circuit in the embodiment of the dual-cylinder composite ignition circuit of the present invention;

[0061] Figure 7 Schematic diagram of the circuit structure of the charging circuit and the discharging circuit in the embodiment of the dual-cylinder composite ignition circuit of the present invention;

[0062] Figure 8 Schematic diagram of the structure of the dual-cylinder composite igniter according to an embodiment of the present invention.

[0063] Explanation of reference numerals: 1. Housing; 2. Spark plug connection pipeline. Detailed implementation manners

[0064] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0065] As Figure 1 shown, a dual-cylinder composite ignition circuit includes a module connector for providing a power supply voltage and an ignition drive signal, and two charge and discharge circuits connected to the module connector; the specific circuit schematic diagram of the charge and discharge circuit is as Figure 2 shown.

[0066] Each charge and discharge circuit includes a control circuit connected to the module connector, a power switch circuit, a discharge trigger circuit, as well as a charging circuit and a discharging circuit respectively connected to the power switch circuit and the discharge trigger circuit. The discharging circuit is connected to the charging circuit and the spark plug;

[0067] The control circuit receives the ignition drive signal and controls the power switch circuit to boost the power supply voltage. After the power supply voltage is boosted, it charges the charging circuit; the discharge trigger circuit receives the ignition drive signal and controls the discharge circuit to supply power to the spark plug.

[0068] The module connector powers two charging and discharging circuits, provides a 12V power supply, and at the same time provides an externally generated ignition drive signal for the two charging and discharging circuits. During actual application, the ignition frequency can be customized through the external drive signal; the drive signal can also achieve manual control, that is, single ignition, or automatic ignition control. Currently, it can achieve automatic output of ignition signals from 1 to 200Hz.

[0069] As Figure 3 shown, the module connector is a J30J-15ZKWP7-J connector; the first pin, second pin, ninth pin, and tenth pin of the module connector are 12V power supply terminals; the twelfth pin, thirteenth pin, fourteenth pin, and fifteenth pin of the module connector are grounded; the fourth pin and fifth pin of the module connector are both drive signal PWM_IN input terminals.

[0070] In this embodiment, the two charging and discharging circuits in the double-cylinder composite ignition circuit have the same composition. Now, the composition of one of the charging and discharging circuits will be described:

[0071] As Figure 2 shown, the charging and discharging circuit includes an integrated chip U1, an optocoupler U2, a transformer T1, a high-voltage package T2, a thyristor S1, a power switch Q1, a switching transistor Q2, resistors R1, R2, R4, R6, R7, R9, R10, R12, R13, R14, R17, a protection resistor R3, R5, an anti-interference resistor R11, capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C16, C17, an anti-reverse diode D1, absorption diodes D2, D3, rectifier diodes D4 and D5.

[0072] As Figure 4 shown, the control circuit includes an integrated chip U1; the model of the integrated chip U1 is LT3750;

[0073] The first pin of the integrated chip U1 is connected to the fourth pin, and is grounded through capacitors C1, C2, C4, and C5; the first pin and the fourth pin of the integrated chip U1 are connected to the 12V power supply terminal;

[0074] The second pin of the integrated chip U1 is connected to the 12V power supply terminal through a resistor R9;

[0075] The third pin of the integrated chip U1 is connected to the drive signal PWM_IN input terminal through a resistor R4, and is grounded through a capacitor C9;

[0076] The fifth pin of the integrated chip U1 is grounded;

[0077] The sixth pin of the integrated chip U1 is connected to the power switch circuit and is grounded through a resistor R7;

[0078] The seventh pin of the integrated chip U1 is connected to the power switch circuit;

[0079] The eighth and ninth pins of the integrated chip U1 are connected to the power switch circuit through resistors R2 and R1 respectively;

[0080] The tenth pin of the integrated chip U1 is grounded through resistor R6 and capacitor C10.

[0081] As Figure 5 shown, the power switch circuit includes transformer T1, power switch transistor Q1, rectifier diodes D4, D5, snubber diodes D2, D3, and reverse protection diode D1; Transformer T1 is a compact surface mount high-frequency transformer, and the turns ratio of the primary side to the secondary side is 1:10:65;

[0082] Transformer T1 includes primary windings N1, N2, and secondary windings N3 and N4;

[0083] The third pin of transformer T1 is grounded, and the seventh pin is floating;

[0084] The fifth pin of the primary winding N1 and the fourth pin of the primary winding N2 are connected to the drain of the power switch transistor Q1, the anode of the snubber diode D3, and resistors R1 and R2;

[0085] The source of the power switch transistor Q1 is connected to the sixth pin of the integrated chip U1 and grounded through resistor R7, and the gate of the power switch transistor Q1 is connected to the seventh pin of the integrated chip U1;

[0086] The cathode of the snubber diode D3 is connected to the cathode of the snubber diode D2. The anode of the snubber diode D2 is connected to the 12V power supply terminal, the cathode of the reverse protection diode D1, one end of capacitors C3 and C6, the first pin of the primary winding N1, and the second pin of the primary winding N2; The other ends of capacitors C3 and C6 are connected to the anode of the reverse protection diode D1 and grounded;

[0087] The sixth pin of the secondary winding N3 is connected to the anode of the rectifier diode D4, and the eighth pin is grounded;

[0088] The tenth pin of the secondary winding N4 is connected to the anode of the rectifier diode D5, and the ninth pin is grounded;

[0089] The cathodes of the rectifier diode D4 and the rectifier diode D5 are both connected to the charging circuit.

[0090] As Figure 6 shown, the discharge trigger circuit includes switch transistor Q2, optocoupler U2, resistors R10, R12, R13, R14, R17, and capacitors C16, C17;

[0091] The gate of switching transistor Q2 is connected to one ends of resistors R14 and R17. The other end of resistor R14 is connected to the input terminal of drive signal PWM_IN, and the other end of resistor R17 is connected to the source of switching transistor Q2 and grounded.

[0092] The drain of switching transistor Q2 is connected to one end of resistor R12, one end of capacitor C16, and the first pin of optocoupler U2. The other end of resistor R12 is connected to the 12V power supply terminal, and the other end of capacitor C16 is grounded.

[0093] The second pin of optocoupler U2 is grounded.

[0094] The third pin of optocoupler U2 is connected to the discharge circuit through resistor R10.

[0095] The fourth pin of optocoupler U2 is connected to the discharge circuit and grounded through capacitor C17 and resistor R13.

[0096] As Figure 7 shown, the charging circuit includes charging capacitors C7, C8, and C11. After charging capacitors C7 and C8 are connected in parallel, they are connected in series between the cathode of rectifier diode D4 and the eighth pin of secondary winding N3.

[0097] Charging capacitor C11 is connected in series between the cathode of rectifier diode D5 and the discharge circuit. Series-connected protection resistors R3 and R5 are connected in parallel across charging capacitors C7 and C8, and anti-interference resistor R11 is connected in parallel across charging capacitor C11.

[0098] The power switch circuit charges charging capacitors C7 and C8 through rectifier diode D4, with a maximum charge voltage of 3000V. The power switch circuit charges charging capacitor C11 through rectifier diode D5, with a maximum charge voltage of 300V.

[0099] By adjusting the parameters of resistors R1, R6, and transformer T1, the charging voltages of charging capacitors C7, C8, and C11 in the charge and discharge circuit can be adjusted.

[0100] As Figure 7 shown, the discharge circuit discharges through the discharge loop after driving thyristor S1 to conduct based on discharge trigger circuit 1. The discharge circuit includes flyback transformer T2 and thyristor S1. Flyback transformer T2 is a pin-type vertical flyback transformer, and the turns ratio of the primary side to the secondary side is 1:100.

[0101] Flyback transformer T2 includes primary winding NP and secondary winding NS.

[0102] Charging capacitor C11 is connected in series between the third pin of primary winding NP and the main terminal 1 of thyristor S1.

[0103] The fourth pin of primary winding NP is connected to the eighth pin of secondary winding N3.

[0104] The first pin of the secondary winding NS is connected to the spark plug, and the second pin is connected to the cathode of the rectifier diode D4.

[0105] As Figure 8 As shown, this embodiment also provides a double-cylinder composite igniter, which includes a housing and a PCB board disposed inside the housing. An ignition circuit is provided on the PCB board; the ignition circuit is the above-mentioned double-cylinder composite ignition circuit; a plurality of spark plug connection pipes are provided on the housing, and the spark plug connection pipes connect the ignition circuit on the PCB board to the spark plug.

[0106] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A double-cylinder composite ignition circuit, characterized in that: It includes a module connector for providing a power supply voltage and an ignition drive signal, and a plurality of charge and discharge circuits connected to the module connector; The charge and discharge circuit includes a control circuit, a power switch circuit, a discharge trigger circuit connected to the module connector, and a charging circuit and a discharge circuit respectively connected to the power switch circuit and the discharge trigger circuit. The discharge circuit is connected to the charging circuit and the spark plug; The control circuit receives the ignition drive signal and controls the power switch circuit to boost the power supply voltage. After the power supply voltage is boosted, it charges the charging circuit; The discharge trigger circuit receives the ignition drive signal and controls the discharge circuit to supply power to the spark plug.

2. The double-cylinder composite ignition circuit according to claim 1, wherein: The module connector is a J30J-15ZKWP7-J connector; The first pin, second pin, ninth pin, and tenth pin of the module connector are 12V power supply terminals; The twelfth pin, thirteenth pin, fourteenth pin, and fifteenth pin of the module connector are grounded; The fourth pin and fifth pin of the module connector are both drive signal PWM_IN input terminals.

3. The dual-cylinder composite ignition circuit according to claim 2, wherein: The control circuit includes an integrated chip U1; The first pin and the fourth pin of the integrated chip U1 are connected and grounded through capacitors C1, C2, C4, and C5; the first pin and the fourth pin of the integrated chip U1 are connected to the 12V power supply terminal; The second pin of the integrated chip U1 is connected to the 12V power supply terminal through a resistor R9; The third pin of the integrated chip U1 is connected to the drive signal PWM_IN input terminal through a resistor R4 and grounded through a capacitor C9; The fifth pin of the integrated chip U1 is grounded; The sixth pin of the integrated chip U1 is connected to the power switch circuit and grounded through a resistor R7; The seventh pin of the integrated chip U1 is connected to the power switch circuit; The eighth pin and the ninth pin of the integrated chip U1 are respectively connected to the power switch circuit through resistors R2 and R1; The tenth pin of the integrated chip U1 is grounded through a resistor R6 and a capacitor C10.

4. The double-cylinder composite ignition circuit according to claim 1, wherein: The power switch circuit includes a transformer T1, a power switch tube Q1, rectifying diodes D4, D5, absorbing diodes D2, D3, and an anti-reverse diode D1; The transformer T1 includes a primary winding N1, N2, and secondary windings N3 and N4; The third pin of the transformer T1 is grounded and the seventh pin is floating; The fifth pin of the primary winding N1 and the fourth pin of the primary winding N2 are connected to the drain of the power switch tube Q1, the anode of the absorbing diode D3, and resistors R1 and R2; The source of the power switch tube Q1 is connected to the sixth pin of the integrated chip U1 and grounded through a resistor R7. The gate of the power switch tube Q1 is connected to the seventh pin of the integrated chip U1; The cathode of the absorbing diode D3 is connected to the cathode of the absorbing diode D2. The anode of the absorbing diode D2 is connected to the 12V power supply terminal, the cathode of the anti-reverse diode D1, one end of capacitors C3 and C6, the first pin of the primary winding N1, and the second pin of the primary winding N2; the other ends of capacitors C3 and C6 are connected to the anode of the anti-reverse diode D1 and grounded; The sixth pin of the secondary winding N3 is connected to the anode of the rectifying diode D4 and the eighth pin is grounded; The tenth pin of the secondary winding N4 is connected to the anode of the rectifier diode D5, and the ninth pin is grounded; The cathodes of the rectifier diode D4 and the rectifier diode D5 are both connected to the charging circuit.

5. The double-cylinder composite ignition circuit according to claim 4, wherein: The charging circuit includes charging capacitors C7, C8 and C11; The charging capacitors C7 and C8 are connected in parallel and then connected in series between the cathode of the rectifier diode D4 and the eighth pin of the secondary winding N3; The charging capacitor C11 is connected in series between the cathode of the rectifier diode D5 and the discharging circuit.

6. The double-cylinder composite ignition circuit according to claim 1, wherein: The discharging trigger circuit includes a switching transistor Q2, an optocoupler U2, resistors R10, R12, R13, R14, R17, and capacitors C16, C17; The gate of the switching transistor Q2 is connected to one ends of the resistors R14 and R17. The other end of the resistor R14 is connected to the input terminal of the driving signal PWM_IN. The other end of the resistor R17 is connected to the source electrode of the switching transistor Q2 and grounded; The drain of the switching transistor Q2 is connected to one end of the resistor R12, one end of the capacitor C16, and the first pin of the optocoupler U2. The other end of the resistor R12 is connected to the 12V power supply terminal, and the other end of the capacitor C16 is grounded; The second pin of the optocoupler U2 is grounded; The third pin of the optocoupler U2 is connected to the discharging circuit through the resistor R10; The fourth pin of the optocoupler U2 is connected to the discharging circuit and grounded through the capacitor C17 and the resistor R13.

7. The dual-cylinder composite ignition circuit according to claim 1, characterized in that: The discharging circuit discharges through a discharging loop after the thyristor S1 is turned on by the discharging trigger circuit 1; the discharging circuit includes a flyback transformer T2 and a thyristor S1; The flyback transformer T2 includes a primary winding NP and a secondary winding NS; The charging capacitor C11 is connected in series between the third pin of the primary winding NP and the main terminal 1 of the thyristor S1; The fourth pin of the primary winding NP is connected to the eighth pin of the secondary winding N3; The first pin of the secondary winding NS is connected to the spark plug, and the second pin is connected to the cathode of the rectifier diode D4.

8. The double-cylinder composite ignition circuit according to claim 1, wherein: Series-connected protection resistors R3 and R5 are connected in parallel across the charging capacitors C7 and C8; An anti-interference resistor R11 is connected in parallel across the charging capacitor C11.

9. The double-cylinder composite ignition circuit according to claim 1, wherein: The transformer T1 is a compact surface mount high-frequency transformer, and the turns ratio of the primary side to the secondary side is 1:10:65; The flyback transformer T2 is a pin-type vertical flyback transformer, and the turns ratio of the primary side to the secondary side is 1:

100.

10. A double-cylinder composite igniter, characterized in that: It includes a housing and a PCB board arranged inside the housing. The ignition circuit is arranged on the PCB board; A plurality of spark plug connection pipelines are arranged on the housing, and the ignition circuit on the PCB board is connected to the spark plug through the spark plug connection pipelines.

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