Ignition coil control device, ignition system, and engine

Abstract

The application provides an ignition coil control device, an ignition system and an engine. The device comprises an input comparison circuit, an input delay circuit, a protection circuit and a driving circuit. The first end of the input comparison circuit, the input delay circuit, the protection circuit and the driving circuit receives a power supply voltage, the control end of the input comparison circuit receives a first electrical signal, the second end of the input comparison circuit, the first end of the input delay circuit and the second end of the protection circuit are coupled to a first node, the third end of the input comparison circuit, the second end of the input delay circuit and the first control end of the driving circuit are coupled to a second node, the third end of the protection circuit and the second control end of the driving circuit are coupled to a third node, and the second end of the driving circuit is coupled to the control end of the ignition control switch of the ignition coil. The application can meet the needs of the ignition coil for the on-off threshold, on-off delay and the like of the ignition control circuit, and can significantly reduce the cost and significantly improve the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of engine control technology, and in particular to an ignition coil control device, an ignition system, and an engine. Background Technology

[0002] Please see Figure 1 , Figure 1 This is a block diagram of the ignition coil control circuit 1 implemented using a custom chip in related technologies. (Example:) Figure 1 As shown, in related technologies, the ignition coil control circuit 1 receives the PWM signal from the ECU (Electronic Control Unit) and drives the IGBT (e.g., Insulated-Gate Bipolar Transistor) control switch of the ignition coil 2 to switch on and off based on the processing result of the PWM signal, thereby charging and discharging the ignition coil 2 to achieve the ignition function of the spark plug 3. Extensive research has revealed that the main parameters required for the ignition coil control circuit 1 when controlling the ignition coil 2 include: on / off threshold, on / off delay, PWM signal over-duty (excessive duty cycle, PWM signal high-level duration exceeding the maximum charging time of the ignition coil 2) fault protection, and SCB (Short Circuit to Battery) fault protection. Among these, the PWM signal over-duty and SCB fault protections protect the ignition coil 2 by delaying and then turning off the IGBT control switch. Further research revealed that the turn-off delay duration is closely related to the control of the ECU and engine. An unreasonable delay can reduce engine torque and output power, affecting engine control performance and efficiency. Furthermore, the research also found that during PWM signal over-duty and SCB fault protection, a slow IGBT turn-off speed increases power consumption, and high-temperature operation can easily cause IGBT overheating and damage. Based on the above research, it is clear that properly setting the required parameters of the ignition coil control circuit 1 can not only effectively reduce power consumption but also improve engine performance and efficiency. The related technology uses the ignition coil driver chip GD... IC Custom chips are typically used; however, this type uses a driver chip, GD. IC The design scheme of adding peripheral circuit 4 to implement ignition coil control circuit 1 has the following defects:

[0003] On the one hand, the driver chip GD IC Custom-designed chips have fixed, fixed parameters that are difficult to adjust. Furthermore, they are not easily platform-based; additionally, they carry the risks of high cost and supply shortages.

[0004] It is to be understood that the information disclosed in this Background section is only for the purpose of enhancing the understanding of the general background of the application and does not suggest or constitute any form of admission that the information forms part of the prior art already known in this field prior to the filing date of the application. SUMMARY

[0005] The present application aims to solve one or more of the problems of the prior art ignition coil control circuit using a driving chip, such as not easy to manage production in a platform, high cost, and unable to meet the diverse needs of demand parameters, etc., and provides an ignition coil control device, an ignition system, and an engine. The present application not only meets the needs of the ignition coil for the on-off threshold of the ignition control circuit, the on-off delay, etc., but also can be realized by discrete devices, which can significantly reduce the cost; further, it is easy to manage production in a platform, which can significantly improve the production efficiency.

[0006] To achieve the above-mentioned purpose, the present application realizes the following technical scheme, an ignition coil control device, comprising: an input comparison circuit, an input delay circuit, a protection circuit, and a driving circuit; the first end of the input comparison circuit, the first end of the protection circuit, and the first end of the driving circuit receive a power supply voltage, the control end of the input comparison circuit receives a first electrical signal, the second end of the input comparison circuit, the first end of the input delay circuit, and the second end of the protection circuit are coupled to a first node, and the input delay circuit receives the power supply voltage through the first node, the third end of the input comparison circuit, the second end of the input delay circuit, and the first control end of the driving circuit are coupled to a second node, the third end of the protection circuit and the second control end of the driving circuit are coupled to a third node, and the second end of the driving circuit is coupled to the control end of the ignition control switch of the ignition coil.

[0007] The ignition coil control device is configured to delay driving the ignition control switch to be in a conduction state when the first electrical signal is greater than or equal to a first preset value, delay driving the ignition control switch to be in an off state when the first electrical signal is less than or equal to a second preset value, and drive the ignition control switch to be in an off state when the duration of the first electrical signal being greater than or equal to the first preset value reaches a preset duration.

[0008] Optionally, the input comparison circuit is configured to output a second electrical signal at the first node according to the power supply voltage and the first electrical signal, and the second electrical signal is a first voltage signal when the first electrical signal is greater than or equal to the first preset value, and the second electrical signal is a second voltage signal when the first electrical signal is less than or equal to the second preset value; the input delay circuit is configured to output a third electrical signal at the second node according to the power supply voltage and the second electrical signal, and the third electrical signal is a third voltage signal when the second electrical signal is the first voltage signal, and the third electrical signal is a fourth voltage signal when the second electrical signal is the second voltage signal; the driving circuit is configured to drive the ignition control switch to be in an on state according to the power supply voltage when the third electrical signal is the third voltage signal, and drive the ignition control switch to be in an off state according to the power supply voltage when the third electrical signal is the fourth voltage signal; the protection circuit is configured to output a fifth voltage signal at the third node according to the power supply voltage when a duration of the second electrical signal being the first voltage signal reaches the preset duration; and the driving circuit is further configured to drive the ignition control switch to be in an off state if the fifth voltage signal is received.

[0009] Optionally, the input comparison circuit includes a first voltage division sub-circuit, a first transistor, and a first RC sub-circuit; a first end of the first voltage division sub-circuit receives the power supply voltage, a second end of the first voltage division sub-circuit is coupled to the second node, a third end of the first voltage division sub-circuit is coupled to a control end of the first transistor, a first end of the first transistor is coupled to the first node, a first end of the first RC sub-circuit receives the first electrical signal and is coupled to a second end of the first transistor, a fourth end of the first voltage division sub-circuit and a second end of the first RC sub-circuit are grounded; and the first electrical signal includes a PWM signal.

[0010] The first voltage division sub-circuit is configured to generate a control voltage of the first transistor according to the power supply voltage and a voltage at the second node; and the first transistor is configured to output a first voltage signal at the first node when the PWM signal is greater than or equal to the first preset value, and output a second voltage signal at the first node when the PWM signal is less than or equal to the second preset value.

[0011] Optionally, the first voltage dividing sub-circuit comprises a first resistor, a second resistor and a third resistor, a first end of the first resistor is coupled to the power supply voltage, a second end of the first resistor, a first end of the second resistor, a first end of the third resistor and a control end of the first transistor are commonly connected, a second end of the second resistor is coupled to the second node, and a second end of the third resistor is grounded.

[0012] Optionally, the first RC sub-circuit comprises a first capacitor and a fourth resistor, a first end of the first capacitor, a second end of the first transistor and a first end of the fourth resistor are coupled to receive the first electrical signal, and a second end of the first capacitor and a second end of the fourth resistor are grounded.

[0013] Optionally, the input comparison circuit further comprises a diode and a first zener, a cathode of the diode is coupled to the control end of the first transistor, an anode of the diode is coupled to an anode of the first zener, a cathode of the first zener and a first end of the first RC sub-circuit are coupled to the second end of the first transistor.

[0014] Optionally, the input delay circuit comprises a second transistor and a second RC sub-circuit, a first end of the second RC sub-circuit is coupled to the first node, a second end of the second RC sub-circuit is coupled to a control end of the second transistor, a first end of the second transistor is coupled to the second node, a third end of the second RC sub-circuit and a second end of the second transistor are grounded.

[0015] The second RC sub-circuit is configured to charge by the power supply voltage when a second electrical signal at the first node is a first voltage signal, so that the second transistor enters a saturation region and outputs a third voltage signal at the second node, and discharge when the second electrical signal at the first node is the second voltage signal, so that the second transistor enters an off region and outputs a fourth voltage signal at the second node.

[0016] Optionally, the second RC sub-circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and a second capacitor, a first end of the fifth resistor is coupled to the first node, a second end of the fifth resistor, a first end of the sixth resistor and a first end of the second capacitor are coupled, a second end of the sixth resistor and a first end of the seventh resistor are coupled to the control end of the second transistor, and a second end of the second capacitor and a second end of the seventh resistor are grounded.

[0017] Optionally, the protection circuit comprises a second voltage division sub-circuit, a time protection sub-circuit and an output sub-circuit, a first end of the second voltage division sub-circuit, a first end of the time protection sub-circuit and a first end of the output sub-circuit receive the power supply voltage, a second end of the second voltage division sub-circuit is coupled to the first node, a third end of the second voltage division sub-circuit is coupled to a control end of the time protection sub-circuit, a second end of the time protection sub-circuit is coupled to a control end of the output sub-circuit, a second end of the output sub-circuit is coupled to the third node, a third end of the time protection sub-circuit and a third end of the output sub-circuit are grounded.

[0018] The second voltage division sub-circuit is configured to control the time protection sub-circuit to be in a charging state according to the power supply voltage when a second electrical signal at the first node is a second voltage signal, so as to turn off the control of the output sub-circuit on the second control end of the driving circuit; and control the time protection sub-circuit to be in a discharging state according to the power supply voltage when the second electrical signal at the first node is a first voltage signal, so as to drive the output sub-circuit to output a fifth voltage signal at the third node, so that the driving circuit drives the ignition control switch to be in an off state.

[0019] Optionally, the second voltage division sub-circuit comprises an eighth resistor and a ninth resistor, a first end of the eighth resistor receives the power supply voltage, a second end of the eighth resistor, a first end of the ninth resistor and a control end of the time protection sub-circuit are coupled, and a second end of the ninth resistor is coupled to the first node.

[0020] Optionally, the time protection sub-circuit comprises a third transistor, a tenth resistor, an eleventh resistor, a twelfth resistor and a third capacitor, a first end of the third transistor receives the power supply voltage, a control end of the third transistor is coupled to a third end of the second voltage division sub-circuit, a second end of the third transistor is coupled to a first end of the tenth resistor, a second end of the tenth resistor, a first end of the eleventh resistor and a first end of the third capacitor are coupled, a second end of the eleventh resistor and a first end of the twelfth resistor are coupled to a control end of the output sub-circuit, and a second end of the third capacitor and a second end of the twelfth resistor are grounded.

[0021] Optionally, the output sub-circuit comprises a thirteenth resistor and a fourth transistor, a first end of the thirteenth resistor receives the power supply voltage, a second end of the thirteenth resistor and a first end of the fourth transistor are coupled to the third node, a control end of the fourth transistor is coupled to a second end of the time protection sub-circuit, and a second end of the fourth transistor is grounded.

[0022] Optionally, the protection circuit further comprises an amplification sub-circuit, a first end of the amplification sub-circuit receives the power supply voltage, a control end of the amplification sub-circuit is coupled to a second end of the output sub-circuit, a second end of the amplification sub-circuit is coupled to the third node, and a third end of the amplification sub-circuit is grounded.

[0023] Optionally, the amplification sub-circuit comprises a fourteenth resistor, a fifth transistor, a fifteenth resistor, a sixth transistor, and a sixteenth resistor, a first end of the fourteenth resistor and a first end of the sixth transistor receive the power supply voltage, a second end of the fourteenth resistor, a first end of the fifth transistor, and a first end of the fifteenth resistor are coupled, a control end of the fifth transistor is coupled to the second end of the output sub-circuit, a second end of the fifteenth resistor is coupled to a control end of the sixth transistor, a second end of the sixth transistor is coupled to the third node after being connected in series with the sixteenth resistor, and a second end of the fifth transistor is grounded.

[0024] Optionally, the driving circuit comprises a third voltage division sub-circuit and a push-pull sub-circuit, a first end of the third voltage division sub-circuit and a first end of the push-pull sub-circuit receive the power supply voltage, a second end of the third voltage division sub-circuit is coupled to a first control end of the push-pull sub-circuit, a third end of the third voltage division sub-circuit is coupled to the second node, a fourth end of the third voltage division sub-circuit and a second control end of the push-pull sub-circuit are coupled to the third node, a second end of the push-pull sub-circuit is coupled to a control end of the ignition control switch, and a third end of the push-pull sub-circuit is grounded.

[0025] Optionally, the third voltage division sub-circuit comprises a seventeenth resistor, an eighteenth resistor, and a nineteenth resistor, a first end of the seventeenth resistor receives the power supply voltage, a second end of the seventeenth resistor and a first end of the eighteenth resistor are coupled to the first control end of the push-pull sub-circuit, a second end of the eighteenth resistor and a first end of the nineteenth resistor are coupled to the second node, and a second end of the nineteenth resistor is coupled to the third node.

[0026] Optionally, the push-pull sub-circuit comprises a seventh transistor, a twentieth resistor, and an eighth transistor, a first end of the seventh transistor receives the power supply voltage, a control end of the seventh transistor is coupled to the second end of the third voltage division sub-circuit, a second end of the seventh transistor is coupled to a first end of the eighth transistor and a control end of the ignition control switch after being connected in series with the twentieth resistor, a control end of the eighth transistor is coupled to the third node, and a second end of the eighth transistor is grounded.

[0027] Optionally, the ignition coil control device further comprises a power supply circuit, the power supply circuit comprises a twenty-first resistor, a fourth capacitor, a second voltage stabilizing tube and a fifth capacitor, a first end of the twenty-first resistor and a first end of the fourth capacitor are configured to receive a power supply voltage, a second end of the twenty-first resistor, a cathode of the second voltage stabilizing tube and a first end of the fifth capacitor are coupled to a fourth node to output the power supply voltage, a second end of the fourth capacitor, an anode of the second voltage stabilizing tube and a second end of the fifth capacitor are grounded.

[0028] To achieve the above object, the present application further provides an ignition system, comprising an ignition coil and the ignition coil control device according to any one of the above.

[0029] To achieve the above object, the present application further provides an engine, comprising the ignition coil control device according to any one of the above or the ignition system according to the above.

[0030] Compared with the prior art, the ignition coil control device, the ignition system and the engine provided by the present application have the following advantages:

[0031] The ignition coil control device provided by the present application can delay driving the ignition control switch to be in the on state when the first electric signal is greater than or equal to the first preset value, and delay driving the ignition control switch to be in the off state when the first electric signal is less than or equal to the second preset value, thereby meeting the on-off threshold and on-off delay requirements of the ignition coil on the ignition control circuit. Meanwhile, the ignition coil control device provided by the present application can drive the ignition control switch to be in the off state when the duration of the first electric signal being greater than or equal to the first preset value reaches a preset duration, thereby effectively ensuring that the ignition coil does not ignite during a fault and achieving fault protection. By reasonably setting the parameters of the devices, the ignition coil control device provided by the present application can not only effectively reduce the power consumption of the ignition control switch, but also improve the performance and efficiency of the engine. Further, the ignition coil control device provided by the present application comprises an input comparison circuit, an input delay circuit, a protection circuit and a driving circuit, thereby being easy to be managed and produced in a platformized manner by using a PCBA (Printed Circuit Board Assembly) process, and being able to produce corresponding ignition coil control devices for different requirements, thereby significantly reducing the cost and improving the production efficiency.

[0032] Since the ignition system and the engine provided by the present application belong to the same inventive concept as the ignition coil control device provided by the present application, the ignition system and the engine provided by the present application at least have all the advantages of the ignition coil control device provided by the present application. For the details of the beneficial effects of the ignition system and the engine provided by the present application, please refer to the relevant description of the beneficial effects of the ignition coil control device provided by the present application, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structural block diagram of an ignition coil control circuit realized by a customized chip in the related art;

[0034] Figure 2 A structural block diagram of the ignition coil control device provided by the first embodiment of the present application;

[0035] Figure 3 A circuit diagram of a specific example of the ignition coil control device provided by the first embodiment of the present application;

[0036] Figure 4 A circuit diagram of a specific example of the ignition coil control device provided by the second embodiment of the present application;

[0037] Figure 5 A circuit diagram of a specific example of the ignition coil control device provided by the third embodiment of the present application;

[0038] In the drawings, the reference signs are as follows:

[0039] Ignition coil control circuit-1, driving chip-GD IC , control switch-IGBT, ignition coil-2, Load, spark plug-3, peripheral circuit-4

[0040] Power supply voltage-V BATT , supply voltage-V IN , first electric signal-EST

[0041] Input comparison circuit-100, first voltage division sub-circuit-110, first resistor-R1, second resistor-R2, third resistor-R3, first triode-U1, first RC sub-circuit-120, first capacitor-C1, fourth resistor-R4, diode-D, first voltage stabilizing tube-Z1

[0042] Input delay circuit-200, second triode-U2, second RC sub-circuit-210, fifth resistor-R5, sixth resistor-R6, seventh resistor-R7, second capacitor-C2

[0043] protection circuit - 300, second voltage division sub-circuit - 310, eighth resistance - R8, ninth resistance - R9, time protection sub-circuit - 320, third triode - U3, tenth resistance - R10, eleventh resistance - R11, twelfth resistance - R12, third capacitor - C3, output sub-circuit - 330, thirteenth resistance - R13, fourth triode - U4, amplification sub-circuit - 340, fourteenth resistance - R14, fifth triode - U5, fifteenth resistance - R15, sixth triode - U6, sixteenth resistance - R16;

[0044] drive circuit - 400, third voltage division sub-circuit - 410, seventeenth resistance - R17, eighteenth resistance - R18, nineteenth resistance - R19, push-pull sub-circuit - 420, seventh triode - U7, twentieth resistance - R20, eighth triode - U8;

[0045] power supply circuit - 500, twenty-first resistance - R21, fourth capacitor - C4, second zener - Z2, fifth capacitor - C5;

[0046] ignition control switch - U9;

[0047] first node - N1, second node - N2, third node - N3, fourth node - N4. DETAILED DESCRIPTION

[0048] The ignition coil control device, ignition system, and engine according to the present application will be described in further detail below with reference to the accompanying drawings. The advantages and features of the present application will become more apparent with the following description. It should be noted that the drawings are very simplified and are not drawn to scale, and are used merely to facilitate a convenient and clear presentation of the embodiments of the present application. For the purpose of making the objects, features, and advantages of the present application more apparent, reference will be made to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are merely intended to facilitate the understanding of the present application and are not intended to limit the present application. Any modification of the structures, change of the proportions, or adjustment of the sizes, which are within the scope of the technical content disclosed by the present application, should still fall within the scope of the present application. The specific design features of the present application disclosed herein include, for example, specific dimensions, directions, positions, and shapes, which will be determined in part by the specific environment in which the present application is applied and used. Also, in the embodiments described below, the same reference numerals are sometimes used across different drawings to indicate the same or similar parts or parts having the same function, and repetitive descriptions thereof are omitted. In this specification, similar reference numerals and letters are used to indicate similar items, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In addition, if the method described herein includes a series of steps, the order of the steps presented herein is not necessarily the only order in which the steps can be performed, and some of the steps described can be omitted and / or some other steps not described herein can be added to the method.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The singular forms “a,” “an,” and “the” include plural objects. The term “or” is generally used to mean “and / or,” the term “several” is generally used to mean “at least one,” and the term “at least two” is generally used to mean “two or more.” Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0050] It should be understood that when a component is referred to as "connected," "connected to," or "coupled to" other components, it may be directly connected to other components, or there may be intermediary components. Conversely, when a component is referred to as "directly connected" or "directly connected to" other components, there are no intermediary components.

[0051] The core idea of ​​this invention is to provide an ignition coil control device, an ignition system, and an engine. This invention not only meets the requirements of the ignition coil for the ignition control circuit, such as the on / off threshold and on / off delay, but also allows the ignition coil control device to be implemented using discrete components, which can significantly reduce costs. Furthermore, it is easy to manage production on a platform, which can significantly improve production efficiency.

[0052] It should be noted that the ignition coil control device and ignition system provided by this invention can be applied to the engine provided by this invention, and the ignition coil control device, ignition system, and engine provided by this invention can be applied to vehicles. It should be understood that the terms "vehicle" or "of a vehicle" or other similar terms as used herein include general motor vehicles, such as passenger vehicles including SUVs, buses, trucks, and various commercial vehicles.

[0053] Example 1

[0054] This embodiment provides an ignition coil control device. For an example, please refer to [link to example]. Figure 2 and Figure 3wherein, Figure 2 a structure block diagram of the ignition coil control device provided by one embodiment of the present application; Figure 3 a circuit diagram of a specific example of the ignition coil control device provided by one embodiment of the present application. From Figure 2 and Figure 3 It can be seen that the ignition coil control device provided by the present application comprises: an input comparison circuit 100, an input delay circuit 200, a protection circuit 300 and a driving circuit 400. Exemplarily, a first end of the input comparison circuit 100, a first end of the protection circuit 300 and a first end of the driving circuit 400 receive a power supply voltage V IN , a control end of the input comparison circuit 100 receives a first electric signal (exemplarily, an ignition control signal, which can be a PWM signal) EST, a second end of the input comparison circuit 100, a first end of the input delay circuit 200 and a second end of the protection circuit 300 are coupled to a first node N1 and the input delay circuit 200 receives the power supply voltage V IN , a third end of the input comparison circuit 100, a second end of the input delay circuit 200 and a first control end of the driving circuit 400 are coupled to a second node N2, a third end of the protection circuit 300 and a second control end of the driving circuit 400 are coupled to a third node N3, and a second end of the driving circuit 400 is coupled to a control end of an ignition control switch U9 of an ignition coil Load. Further, the ignition coil control device is configured to delay drive the ignition control switch U9 to be in a conduction state when the first electric signal EST is greater than or equal to a first preset value, delay drive the ignition control switch U9 to be in an off state when the first electric signal EST is less than or equal to a second preset value, and drive the ignition control switch U9 to be in the off state when a time length during which the first electric signal EST is greater than or equal to the first preset value reaches a preset time length.

[0055] The ignition coil control device provided by the application can drive the ignition control switch U9 to be in the on state when the first electric signal EST is greater than or equal to the first preset value, and drive the ignition control switch U9 to be in the off state when the first electric signal EST is less than or equal to the second preset value, so as to meet the on-off threshold and on-off delay requirements of the ignition coil Load on the ignition control circuit. Meanwhile, the ignition coil control device provided by the application can drive the ignition control switch U9 to be in the off state when the duration of the first electric signal EST being greater than or equal to the first preset value reaches a preset duration, so as to effectively ensure that the ignition coil Load does not ignite during a fault, and realize fault protection. By reasonably setting the device parameters, the ignition coil control device provided by the application can effectively reduce the power consumption of the ignition control switch, and improve the performance and efficiency of the engine. Further, the ignition coil control device provided by the application comprises an input comparison circuit 100, an input delay circuit 200, a protection circuit 300 and a driving circuit 400, which are designed by discrete devices and realized by the PCBA (Printed Circuit Board Assembly) process, are easy to manage and produce, and can produce corresponding ignition coil control devices according to different requirements, thereby significantly reducing the cost and improving the production efficiency.

[0056] It should be understood that the application does not make too many limitations on the specific values of the first preset value, the second preset value and the preset duration. However, those skilled in the art should understand that the second preset value is less than the first preset value. Preferably, the preset duration is less than the safe working duration of the ignition coil, and the preset duration is greater than the maximum duration of the normal working of the ignition coil, so as to effectively protect the ignition coil while ensuring the normal working of the ignition coil. Further, the application does not make specific limitations on the specific implementation of the ignition control switch U9. For example, the ignition control switch U9 can be an IGBT (Insulate-Gate Bipolar Transistor), but is not limited thereto. Hereinafter, the ignition control switch U9 is taken as an example of IGBT unless otherwise specified.

[0057] Preferably, in some exemplary embodiments, the input comparison circuit 100 is configured to compare the supply voltage V INand output a second electrical signal at the first node N1 based on the first electrical signal EST, and the second electrical signal is a first voltage signal when the first electrical signal EST is greater than or equal to the first preset value, and the second electrical signal is a second voltage signal when the first electrical signal EST is less than or equal to the second preset value; the input delay circuit 200 is configured to output a third electrical signal at the second node N2 based on the supply voltage V IN and output a third electrical signal at the second node N2 based on the second electrical signal, and the third electrical signal is a third voltage signal when the second electrical signal is the first voltage signal, and the third electrical signal is a fourth voltage signal when the second electrical signal is the second voltage signal; the drive circuit 400 is configured to drive the ignition control switch U9 to be in a conducting state based on the supply voltage V IN when the third electrical signal is the third voltage signal, and drive the ignition control switch U9 to be in a non-conducting state based on the supply voltage V IN when the third electrical signal is the fourth voltage signal; the protection circuit 300 is configured to output a fifth voltage signal at the third node N3 based on the supply voltage V IN when the second electrical signal is the first voltage signal for a duration reaching the preset duration, and drive the ignition control switch U9 to be in a non-conducting state based on the supply voltage V

[0058] Therefore, the ignition coil control device provided by the application can output a first voltage signal at the first node N1 when the first electric signal EST is greater than or equal to the first preset value (i.e., the turn-on voltage), and output a second voltage signal at the first node N1 when the first electric signal EST is less than or equal to the second preset value (i.e., the turn-off voltage), thereby improving the stability and reliability of the ignition coil control device, avoiding the misoperation of the ignition control switch U9 caused by noise or ground offset, and laying a foundation for ensuring the normal and stable operation of the ignition coil. Further, the input delay circuit 200 can output a third voltage signal at the second node N2 when the second electric signal is the first voltage signal, and output the fourth voltage signal at the second node N2 when the second electric signal is the second voltage signal, so as to control the turn-on and turn-off states of the ignition control switch U9 through the drive circuit 400, realize the turn-on delay and turn-off delay of the ignition control switch U9, improve the anti-interference degree of the ignition coil control device to electromagnetic interference, and reasonably improve the control performance and efficiency of the engine. Further, the protection circuit 300 can output a fifth voltage signal at the third node N3 when the duration of the first voltage signal of the second electric signal reaches the preset duration, and the drive circuit 400 drives the ignition control switch U9 to be in the turn-off state when receiving the fifth voltage signal, thereby limiting the maximum turn-on time of the ignition control switch U9 when the first electric signal EST appears Over duty or SCB fault through the mutual cooperation of the input comparison circuit 100, the protection circuit 300 and the drive circuit 400, thereby effectively ensuring that the ignition coil Load does not ignite during the fault period, and further improving the safety of the ignition system.

[0059] Preferably, in some exemplary embodiments, please continue to refer to Figure 2 and Figure 3 from Figure 2 and Figure 3 It can be seen that the input comparison circuit 100 comprises a first voltage division sub-circuit 110, a first triode U1 and a first RC sub-circuit 120; the first end of the first voltage division sub-circuit 110 receives the power supply voltage V IN, the second end of the first voltage division sub-circuit 110 is coupled to the second node N2, the third end of the first voltage division sub-circuit 110 is coupled to the control end of the first triode U1, the first end of the first triode U1 is coupled to the first node N1, the first end of the first RC sub-circuit 120 receives the first electrical signal EST and is coupled to the second end of the first triode U1, the fourth end of the first voltage division sub-circuit 110 and the second end of the first RC sub-circuit 120 are grounded; the first electrical signal EST includes a PWM signal. Correspondingly, the first voltage division sub-circuit 110 is configured to generate the control voltage of the first triode U1 according to the supply voltage V IN and the voltage at the second node N2; the first triode U1 is configured to output a first voltage signal at the first node N1 when the PWM signal is greater than or equal to the first preset value, and output a second voltage signal at the first node N1 when the PWM signal is less than or equal to the second preset value.

[0060] Therefore, the input comparison circuit 100 of the ignition coil control device provided by the present application includes the first voltage division sub-circuit 110, the first triode U1 and the first RC sub-circuit 120, the reference voltage can be obtained through the first voltage division sub-circuit 110, and the switching characteristics of the first triode U1 are fully utilized, the first voltage signal is output at the first node N1 when the PWM signal is greater than or equal to the first preset value (i.e. the on voltage), and the second voltage signal is output at the first node N1 when the PWM signal is less than or equal to the second preset value (i.e. the off voltage), which can effectively avoid the false operation of the ignition control switch U9 caused by noise or ground offset; further, the first RC sub-circuit 120 can denoise, shape and the like of the PWM signal, thereby effectively improving the working stability of the ignition coil control device, and further, the design of the input comparison circuit 100 including the first voltage division sub-circuit 110, the first triode U1 and the first RC sub-circuit 120 also has the advantages of clear logic, simple structure and easy implementation.

[0061] It should be noted that the input comparison circuit 100 described herein includes the first voltage division sub-circuit 110, the first triode U1 and the first RC sub-circuit 120 are only exemplary descriptions of the preferred embodiments, and are not limitations of the present application. The present application does not make too many limitations on the specific implementation of the input comparison circuit 100. In other embodiments, the input comparison circuit 100 can also use other implementations other than the first voltage division sub-circuit 110, the first triode U1 and the first RC sub-circuit 120. For example, the input comparison circuit 100 can also be realized by combining a reference voltage generating circuit with a comparison sub-circuit. Due to the limited space, this will not be described here. Those skilled in the art can implement the present application according to the content disclosed herein, and are not limited to the exemplary content of the preferred embodiments shown herein.

[0062] Further, the present application does not make too many limitations on the specific implementation of the first triode U1. The first triode U1 can be, but is not limited to, a MOS tube, a triode and other switching devices with three terminals. The control end of the first triode U1 is the base. In particular, Figure 2 and Figure 3 The first triode U1 shown is an NPN triode, the first end is the collector, and the second end is the emitter, which is only an exemplary description and is not a limitation. In order to avoid repetition, the specific implementation of the second triode U2, the third triode U3, the fourth triode U4, the fifth triode U5, the sixth triode U6, the seventh triode U7 and the eighth triode U8 will not be described in detail below. They are all switching devices with three terminals. Please refer to the description of this paragraph for adaptive understanding. In order to avoid repetition, the similar principles will not be described one by one herein.

[0063] Exemplarily, from Figure 3 It can also be seen that the first voltage division sub-circuit 110 includes a first resistor R1, a second resistor R2 and a third resistor R3. The first end of the first resistor R1 is coupled to the power supply voltage V IN The second end of the first resistor R1, the first end of the second resistor R2, the first end of the third resistor R3 and the control end of the first triode U1 are connected in common. The second end of the second resistor R2 is coupled to the second node N2, and the second end of the third resistor R3 is grounded. In this way, the first voltage division sub-circuit 110 is realized by using the first resistor R1, the second resistor R2 and the third resistor R3 which are low in price and easy to obtain. Not only can the cost be effectively reduced, but also by reasonably selecting the electrical parameters (such as resistance) of the first resistor R1, the second resistor R2 and the third resistor R3, a good foundation can be laid for meeting the individualized needs of demand parameters.

[0064] It should be noted that, as can be understood by those skilled in the art, the present application does not make too many limitations on the specific values of the electrical parameters (such as resistance) of the first resistance R1, the second resistance R2 and the third resistance R3. In the implementation of the present application, the specific values should be reasonably set according to the actual requirements of the demand parameters. Similarly, the present application does not make too many limitations on the specific values of the fourth resistance R4, the fifth resistance R5, the sixth resistance R6, the seventh resistance R7, the eighth resistance R8, the ninth resistance R9, the tenth resistance R10, the eleventh resistance R11, the twelfth resistance R12, the thirteenth resistance R13, the fourteenth resistance R14, the fifteenth resistance R15, the sixteenth resistance R16, the seventeenth resistance R17, the eighteenth resistance R18, the nineteenth resistance R19, the twentieth resistance R20 and the twenty-first resistance R21 described below. In order to avoid repetition, they will not be explained one by one below.

[0065] Exemplarily, from Figure 3 It can also be seen that the first RC sub-circuit 120 includes a first capacitor C1 and a fourth resistance R4, a first end of the first capacitor C1, a second end of the first triode U1 and a first end of the fourth resistance R4 are coupled to receive the first electrical signal EST; the second end of the first capacitor C1 and the second end of the fourth resistance R4 are grounded. Thus, the first RC sub-circuit 120 is realized by using the first capacitor C1 and the fourth resistance R4, which not only has a simple structure, but also is easy to implement.

[0066] Based on the foregoing description, it can be understood that the present application does not make too many limitations on the specific values of the electrical parameters (such as capacitance) of the first capacitor C1. In the implementation of the present application, the specific values should be reasonably set according to the actual requirements of the demand parameters. Similarly, the present application does not make too many limitations on the specific values of the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the fifth capacitor C5 described below. In order to avoid repetition, they will not be explained one by one below.

[0067] Preferably, in some exemplary embodiments, please continue to refer to Figure 3 , from Figure 3 It can be seen that the input comparison circuit 100 further includes a diode D and a first stabilizing tube Z1, the cathode of the diode D is coupled to the control end of the first triode U1, the anode of the diode D is coupled to the anode of the first stabilizing tube Z1, the cathode of the first stabilizing tube Z1 and the first end of the first RC sub-circuit 120 are coupled to the second end of the first triode U1. Thus, by means of the reverse series connection of the diode D and the first stabilizing tube Z1, bidirectional overvoltage protection can be realized, which can better protect the first triode U1 from damage, further improving the stability and reliability of the ignition coil control device provided by the present application.

[0068] In addition, it can be understood that the above-mentioned connection mode of the diode D and the first voltage stabilizer Z1 is only exemplary and is not a limitation of the present application. For example, in some other embodiments, the diode D and the first voltage stabilizer Z1 can also be connected in the following manner: the anode of the first voltage stabilizer Z1 is coupled to the control terminal of the first triode U1, the cathode of the first voltage stabilizer Z1 is coupled to the cathode of the diode D, the anode of the diode D and the first end of the first RC sub-circuit 120 are coupled to the second end of the first triode U1. The same can achieve bidirectional overvoltage protection, better protect the first triode U1 from damage, and further improve the stability and reliability of the ignition coil control device provided by the present application.

[0069] Preferably, in some exemplary embodiments, please continue to refer to Figure 2 and Figure 3 from Figure 2 and Figure 3 It can be seen that the input delay circuit 200 includes a second triode U2 and a second RC sub-circuit 210, the first end of the second RC sub-circuit 210 is coupled to the first node N1, the second end of the second RC sub-circuit 210 is coupled to the control terminal of the second triode U2, the first end of the second triode U2 is coupled to the second node N2, the third end of the second RC sub-circuit 210 and the second end of the second triode U2 are grounded. Correspondingly, the second RC sub-circuit 210 is configured to charge when the second electric signal at the first node N1 is the first voltage signal, so that the second triode U2 enters the saturation region and outputs a third voltage signal at the second node N2; and discharge when the second electric signal at the first node N1 is the second voltage signal, so that the second triode U2 enters the cutoff region and outputs a fourth voltage signal at the second node N2. IN Charging so that the second triode U2 enters the saturation region and outputs a third voltage signal at the second node N2; and discharge when the second electric signal at the first node N1 is the second voltage signal, so that the second triode U2 enters the cutoff region and outputs a fourth voltage signal at the second node N2.

[0070] Further, from Figure 2 and Figure 3 It can also be seen that the input delay circuit 200 receives the power supply voltage V IN The power supply voltage V IN can be indirectly received by the second sub-circuit 310 of the protection circuit 300, so that the input delay circuit 200 can not only save discrete devices and reduce costs, but also effectively reduce the circuit area by sharing the second sub-circuit 310 of the protection circuit 300. For more details about the second sub-circuit 310, please refer to the relevant description of each component of the protection circuit 300 below, which will not be expanded here.

[0071] It can be seen that the input delay circuit 200 of the ignition coil control device provided by the present application comprises a second transistor U2 and a second RC sub-circuit 210, when the second electric signal at the first node N1 is a first voltage signal, the power supply voltage V IN The second RC sub-circuit 210 can charge the second transistor U2 to enter the saturation region through the second voltage dividing sub-circuit 310, and the charging duration realizes the conduction delay; when the second electric signal at the first node N1 is the second voltage signal, the second RC sub-circuit 210 discharges the second transistor U2 to enter the cut-off region, and the discharging duration realizes the turn-off delay. Thus, the conduction / cut-off state of the second transistor U2 is synchronized with the ignition control switch U9, the delay control of the second transistor U2 is realized by the second RC sub-circuit 210, and the delay control of the conduction / cut-off of the ignition control switch U9 is realized, which can not only improve the anti-interference of the ignition coil control device to the electromagnetic interference, but also effectively improve the performance and efficiency of the engine by reasonably setting the electrical parameters (such as the delay duration) of the second RC sub-circuit 210. Further, the design of the input delay circuit 200 comprising the second transistor U2 and the second RC sub-circuit 210 also has the advantages of clear logic, simple structure and easy implementation.

[0072] It should be particularly pointed out that the input delay circuit 200 comprising the second transistor U2 and the second RC sub-circuit 210 in the present application is only an exemplary description of the preferred embodiment, and is not a limitation of the present application. The specific implementation of the input delay circuit 200 is not limited too much. In other embodiments, the input delay circuit 200 can also be implemented in other ways other than the second transistor U2 and the second RC sub-circuit 210. For example, the input delay circuit 200 can also be implemented in the form of a timer circuit, a CPLD / FPGA or an operational amplifier circuit, but is not limited to these. Due to the limitation of the length of the article, it is not expanded here, and those skilled in the art can implement the present application according to the content disclosed herein, and it is not limited to the exemplary content of the preferred embodiment shown herein.

[0073] Exemplarily, from Figure 3It can be seen that the second RC sub-circuit 210 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and a second capacitor C2, a first end of the fifth resistor R5 is coupled to the first node N1, a second end of the fifth resistor R5, a first end of the sixth resistor R6 and a first end of the second capacitor C2 are coupled, a second end of the sixth resistor R6 and a first end of the seventh resistor R7 are coupled to the control end of the second triode U2, a second end of the second capacitor C2 and a second end of the seventh resistor R7 are grounded. Thus, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the second capacitor C2 are used to realize the design of the second RC sub-circuit 210, which is simple in structure and easy to implement.

[0074] Preferably, in some exemplary embodiments, please continue to refer to Figure 2 and Figure 3 , the protection circuit 300 includes a second voltage division sub-circuit 310, a time protection sub-circuit 320 and an output sub-circuit 330, a first end of the second voltage division sub-circuit 310, a first end of the time protection sub-circuit 320 and a first end of the output sub-circuit 330 receive the power supply voltage V IN , a second end of the second voltage division sub-circuit 310 is coupled to the first node N1, a third end of the second voltage division sub-circuit 310 is coupled to the control end of the time protection sub-circuit 320, a second end of the time protection sub-circuit 320 is coupled to the control end of the output sub-circuit 330, a second end of the output sub-circuit 330 is coupled to the third node N3, a third end of the time protection sub-circuit 320 and a third end of the output sub-circuit 330 are grounded. Correspondingly, the second voltage division sub-circuit 310 is configured to control the time protection sub-circuit 320 to be in a charging state according to the power supply voltage V IN when the second electrical signal at the first node N1 is a second voltage signal, so as to turn off the control of the output sub-circuit 330 on the second control end of the drive circuit 400; when the second electrical signal at the first node N1 is a first voltage signal, according to the power supply voltage V IN control the time protection sub-circuit 320 to discharge drive the output sub-circuit 330 to output a fifth voltage signal at the third node N3, so that the drive circuit 400 drives the ignition control switch U9 to be in an off state.

[0075] As can be seen, the protection circuit 300 of the ignition coil control device provided by the present invention includes a second voltage divider circuit 310, a time protection circuit 320, and an output circuit 330. When the second electrical signal at the first node N1 is a second voltage signal, the second voltage divider circuit 310 enables the time protection circuit 320 to be in a charging state, causing the output circuit 330 to output a sixth voltage signal at the third node N3, thereby turning off the control of the output circuit 330 on the second control terminal of the drive circuit 400, so that the drive circuit 400 is only subject to the supply voltage V. IN The input delay circuit 200 is controlled; when the second electrical signal at the first node N1 is the first voltage signal, the time protection sub-circuit 320 discharges, causing the output sub-circuit 330 to output the fifth voltage signal at the third node N3, so that the drive circuit 400 drives the ignition control switch U9 to be in the off state, which can effectively ensure that the ignition coil Load does not ignite during the fault period, thus realizing fault protection; at the same time, by selecting the electrical parameters of the time protection sub-circuit 320 (such as the device parameters of the time protection sub-circuit 320), different fault protection duration requirements can be met. In addition, the design of the protection circuit 300, including the second voltage divider sub-circuit 310, the time protection sub-circuit 320, and the output sub-circuit 330, also has the advantages of clear logic, simple structure, and ease of implementation.

[0076] It should be noted that the protection circuit 300 described herein, including the second voltage divider circuit 310, the time protection sub-circuit 320, and the output sub-circuit 330, is merely an exemplary illustration of a preferred embodiment and not a limitation of the present invention. The present invention does not impose excessive limitations on the specific implementation of the protection circuit 300. In other embodiments, the protection circuit 300 may also be implemented in ways other than the second voltage divider circuit 310, the time protection sub-circuit 320, and the output sub-circuit 330. For example, the protection circuit 300 may also be implemented using, but is not limited to, timer circuits, CPLD / FPGAs, and operational amplifier circuits. Due to space limitations, further details are not provided here. Those skilled in the art can apply the principles disclosed herein to implement the present invention and are not limited to the exemplary content of the preferred embodiments shown herein.

[0077] For example, from Figure 3 It can be seen that the second voltage divider circuit 310 includes an eighth resistor R8 and a ninth resistor R9, and the first terminal of the eighth resistor R8 receives the supply voltage V. INThe second end of the eighth resistor R8, the first end of the ninth resistor R9, and the control end of the time protection sub-circuit 320 are coupled, and the second end of the ninth resistor R9 is coupled to the first node N1. Thus, the eighth resistor R8 and the ninth resistor R9 are used to realize the design of the second voltage division sub-circuit 310, which is simple in structure and easy to implement.

[0078] Exemplarily, the first voltage division sub-circuit 310 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1. Figure 3 It can also be seen that the time protection sub-circuit 320 includes a third triode U3, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a third capacitor C3. The first end of the third triode U3 receives the power supply voltage V IN The control end of the third triode U3 is coupled to the third end of the second voltage division sub-circuit 310, the second end of the third triode U3 is coupled to the first end of the tenth resistor R10, the second end of the tenth resistor R10, the first end of the eleventh resistor R11, and the first end of the third capacitor C3 are coupled, the second end of the eleventh resistor R11 and the first end of the twelfth resistor R12 are coupled to the control end of the output sub-circuit 330, and the second end of the third capacitor C3 and the second end of the twelfth resistor R12 are grounded. Thus, the third triode U3, the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, and the third capacitor C3 are used to realize the design of the time protection sub-circuit 320, which is simple in structure and easy to implement.

[0079] Exemplarily, the first voltage division sub-circuit 310 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1. Figure 3 It can also be seen that the time protection sub-circuit 320 includes a third triode U3, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a third capacitor C3. The first end of the third triode U3 receives the power supply voltage V IN The second end of the thirteenth resistor R13 and the first end of the fourth triode U4 are coupled to the third node N3, the control end of the fourth triode U4 is coupled to the second end of the time protection sub-circuit 320, and the second end of the fourth triode U4 is grounded. Thus, the thirteenth resistor R13 and the fourth triode U4 are used to realize the design of the output sub-circuit 330, which is simple in structure and easy to implement.

[0080] Preferably, in some exemplary embodiments, please continue to refer to Figure 2 and Figure 3 Exemplarily, the first voltage division sub-circuit 310 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a first capacitor C1. Figure 2 and Figure 3 It can also be seen that the time protection sub-circuit 320 includes a third triode U3, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a third capacitor C3. The first end of the third triode U3 receives the power supply voltage V INThe second terminal of the third voltage divider circuit 410 is coupled to the first control terminal of the push-pull circuit 420, the third terminal of the third voltage divider circuit 410 is coupled to the second node N2, the fourth terminal of the third voltage divider circuit 410 and the second control terminal of the push-pull circuit 420 are coupled to the third node N3, the second terminal of the push-pull circuit 420 is coupled to the control terminal of the ignition control switch U9, and the third terminal of the push-pull circuit 420 is grounded.

[0081] As can be seen, the drive circuit 400 of the ignition coil control device provided by the present invention includes a push-pull circuit 420. The push-pull circuit 420 can condition the first electrical signal EST, processed by the input comparator circuit 100 and the input delay circuit 200, driving the ignition control switch U9 to be in an on or off state, thereby improving energy conversion efficiency and reducing electromagnetic interference. Furthermore, the design of the drive circuit 400, including the third voltage divider circuit 410 and the push-pull circuit 420, also has the advantages of clear logic, simple structure, and ease of implementation.

[0082] It should be noted that the driving circuit 400 described herein, including the third voltage divider circuit 410 and the push-pull circuit 420, is merely an exemplary illustration of a preferred embodiment and not a limitation of the present invention. The present invention does not impose excessive limitations on the specific implementation of the driving circuit 400. In other embodiments, the driving circuit 400 may also employ other implementation methods besides the third voltage divider circuit 410 and the push-pull circuit 420. For example, the driving circuit 400 may also be implemented using methods including, but not limited to, totem pole driving circuits or bootstrap driving circuits. Due to space limitations, further details are not provided here. Those skilled in the art can apply the principles disclosed herein to implement the present invention and are not limited to the exemplary content of the preferred embodiments shown herein.

[0083] For example, from Figure 3 It can be seen that the third voltage divider circuit 410 includes a seventeenth resistor R17, an eighteenth resistor R18, and a nineteenth resistor R19. The first terminal of the seventeenth resistor R17 receives the supply voltage V. IN The second end of the seventeenth resistor R17 and the first end of the eighteenth resistor R18 are coupled to the first control terminal of the push-pull circuit 420. The second end of the eighteenth resistor R18 and the first end of the nineteenth resistor R19 are coupled to the second node N2, and the second end of the nineteenth resistor R19 is coupled to the third node N3. Therefore, the design of the third voltage divider circuit 410 using the seventeenth resistor R17, the eighteenth resistor R18, and the nineteenth resistor R19 is simple in structure and easy to implement.

[0084] Exemplarily, from Figure 3 It can also be seen that the push-pull sub-circuit 420 comprises a seventh transistor U7, a twentieth resistor R20 and an eighth transistor U8, a first end of the seventh transistor U7 receives the power supply voltage V IN , a control end of the seventh transistor U7 is coupled with a second end of the third voltage division sub-circuit 410, a second end of the seventh transistor U7 is coupled with a first end of the eighth transistor U8 and a control end of the ignition control switch U9 after being connected with the twentieth resistor R20 in series, a control end of the eighth transistor U8 is coupled with the third node N3, and a second end of the eighth transistor U8 is grounded. Thus, the seventh transistor U7, the twentieth resistor R20 and the eighth transistor U8 are adopted to realize the design of the push-pull sub-circuit 420, which is simple in structure and easy to implement.

[0085] Embodiment Two

[0086] This embodiment provides another ignition coil control device, exemplarily, please refer to Figure 4 The circuit diagram of a specific example of the ignition coil control device provided in this embodiment. In combination with Figure 2 , Figure 3 and Figure 4 It is not difficult to see that the ignition coil control device provided in this embodiment is basically the same as the ignition coil control device provided in Embodiment One, the difference is that the protection circuit 300 of the ignition coil control device provided in this embodiment further comprises an amplification sub-circuit 340. In order to avoid repetition, only the differences from Embodiment One will be described below, and for the parts not mentioned in this embodiment, please refer to the relevant description of Embodiment One for adaptive understanding.

[0087] From Figure 4 It can be seen that the first end of the amplification sub-circuit 340 of the protection circuit 300 of the ignition coil control device provided in this embodiment receives the power supply voltage V IN , the control end of the amplification sub-circuit 340 is coupled with the second end of the output sub-circuit 330, the second end of the amplification sub-circuit 340 is coupled with the third node N3, and the third end of the amplification sub-circuit 340 is grounded. Thus, the ignition coil control device provided in the present application can accelerate the turn-off of the ignition control switch U9 through the amplification sub-circuit 340, so that the turn-off time of the ignition control switch U9 can reach the us level, the turn-off loss and the risk of thermal damage of the ignition control switch U9 are reduced, and the safety of the circuit is improved.

[0088] Preferably, in some exemplary embodiments, please continue to refer to Figure 4, the amplification sub-circuit 340 comprises a fourteenth resistor R14, a fifth transistor U5, a fifteenth resistor R15, a sixth transistor U6 and a sixteenth resistor R16, a first end of the fourteenth resistor R14 and a first end of the sixth transistor U6 receive the power supply voltage V IN , a second end of the fourteenth resistor R14, a first end of the fifth transistor U5 and a first end of the fifteenth resistor R15 are coupled, a control end of the fifth transistor U5 is coupled to a second end of the output sub-circuit 330, a second end of the sixth transistor U6 is coupled to a second end of the third node N3 in series with the sixteenth resistor R16, and a second end of the fifth transistor U5 is grounded. Thus, the design of the amplification sub-circuit 340 is realized by the fourteenth resistor R14, the fifth transistor U5, the fifteenth resistor R15, the sixth transistor U6 and the sixteenth resistor R16, which is simple in structure and easy to implement.

[0089] It should be particularly pointed out that the amplification sub-circuit 340 described herein includes the fourteenth resistor R14, the fifth transistor U5, the fifteenth resistor R15, the sixth transistor U6 and the sixteenth resistor R16 is only an exemplary description of the preferred embodiment, not a limitation of the present application, and the present application does not make too many limitations on the specific implementation of the amplification sub-circuit 340. For more detailed content on how to realize the amplification sub-circuit 340, please refer to the relevant content of the amplification circuit known to those skilled in the art, and due to the limited space, this paper does not expand the description.

[0090] Embodiment three

[0091] This embodiment provides another kind of ignition coil control device, exemplarily, please refer to Figure 5 , Figure 5 The circuit diagram of a specific example of the ignition coil control device provided in this embodiment. In combination with Figure 2 , Figure 3 and Figure 5 It can be seen that the ignition coil control device provided in this embodiment is basically the same as the ignition coil control device provided in embodiment one, the difference is that the ignition coil control device provided in this embodiment further comprises a power supply circuit 500. In order to avoid repetition, only the differences from embodiment one will be described below, and for the parts not mentioned in this embodiment, please refer to the relevant description of embodiment one for adaptive understanding.

[0092] Exemplarily, from Figure 5 It can be seen that the power supply circuit 500 comprises a twenty-first resistor R21, a fourth capacitor C4, a second voltage stabilizing tube Z2 and a fifth capacitor C5, a first end of the twenty-first resistor R21 and a first end of the fourth capacitor C4 are used to receive a power supply voltage VBATT The second end of the twenty-first resistor R21, the cathode of the second Zener Z2 and the first end of the fifth capacitor C5 are coupled to a fourth node N4 to output the power supply voltage V IN The second end of the fourth capacitor C4, the anode of the second Zener Z2 and the second end of the fifth capacitor C5 are grounded. Thus, the power supply circuit 500 of the ignition coil control device provided by the present application adopts a design mode of combining current-limiting resistor, capacitor and Zener, and can convert the battery voltage into the required power supply voltage V IN The resistor, capacitor and Zener device are inexpensive, and can significantly reduce the cost.

[0093] It should be noted that, as can be understood by those skilled in the art, the power supply circuit 500 described herein includes the twenty-first resistor R21, the fourth capacitor C4, the second Zener Z2 and the fifth capacitor C5 are only exemplary description of the preferred embodiment, and not limit the present application, the present application does not make too much limitation on the specific implementation of the power supply circuit 500. For more details about how to achieve the power supply circuit 500, please refer to the relevant content of the voltage conversion circuit and the voltage stabilizing circuit known to those skilled in the art, due to the limited space, this paper does not expand the description.

[0094] First, for the details of the amplification sub-circuit 340, please refer to the relevant description of the ignition coil control device provided in the above-mentioned embodiment two; for the details of the power supply circuit 500, please refer to the relevant description of the ignition coil control device provided in the above-mentioned embodiment three; in order to avoid repetition, in this embodiment, the amplification sub-circuit 340 of the protection circuit 300 of the ignition coil control device and the power supply circuit 500 of the ignition coil control device are not described.

[0095] Second, for more details of the second triode U2 and the second RC sub-circuit 210 of the input delay circuit 200 of the ignition coil control device provided in this embodiment, and the time protection sub-circuit 320 and the output sub-circuit 330 of the protection circuit 300, please refer to the relevant description of embodiment one.

[0096] In order to better understand the present application, first, combined with Figure 5 The working principle of the ignition coil control device provided by the present application is described as follows:

[0097] (1), the first electric signal EST (PWM signal) is high level state: when the first electric signal EST exceeds the first preset value V th-onWhen the signal voltage is lower than the first preset value V IN When the signal voltage is lower than the first preset value V IN The gate of the ignition control switch U9 is supplied with power through the twentieth resistor R20, generating the gate control signal of the ignition control switch U9, and turning on the ignition control switch U9 to charge the ignition coil Load.

[0098] (2), the first electric signal EST (PWM signal) is low: when the signal voltage is lower than the second preset value V th-off When the signal voltage is lower than the first preset value V IN The gate of the ignition control switch U9 is supplied with power through the twentieth resistor R20, generating the gate control signal of the ignition control switch U9, and turning on the ignition control switch U9 to charge the ignition coil Load.

[0099] (3), PWM signal Over duty or SCB fault: when the first electrical signal EST is at low level, the voltage division of the eighth resistance R8 and the ninth resistance R9 makes the emitter-base of the third triode U3 forward biased, the third triode U3 enters the saturation region, the tenth resistance R10 charges the third capacitor C3, the fourth triode U4 works in the saturation region, the fifth triode U5 and the sixth triode U6 work in the cut-off region; when the first electrical signal EST is at high level for a long time (such as more than a preset time), the first triode U1 is in the cut-off state, the third triode U3 is also in the cut-off state (which can be realized by selecting the resistance values of the eighth resistance R8 and the ninth resistance R9 according to the electrical parameters of the third triode U3), the third capacitor C3 discharges through the eleventh resistance R11, the twelfth resistance R12 and the base-emitter of the fourth triode U4 (the preset time can be understood as the time for discharging to the fourth triode U4 entering the cut-off region), when the voltage of the third capacitor C3 is lower than a certain value, the base voltage of the fourth triode U4 becomes low, the fourth triode U4 enters the cut-off region, the collector voltage of the fourth triode U4 rises, the base-emitter of the fifth triode U5 is positively biased, the fifth triode U5 and the sixth triode U6 enter the saturation region in turn, and the supply voltage V IN The base-emitter of the eighth triode U8 is forward biased by the sixteenth resistance R16, the eighth triode U8 enters the saturation region, the gate of the ignition control switch U9 is pulled down to the ground, and the ignition control switch U9 is turned off. When the fault disappears, the first electrical signal EST is pulled to low level again, the first triode U1 and the third triode U3 enter the saturation region, the third capacitor C3 is recharged, the fourth triode U4 enters the saturation region, the fifth triode U5 and the sixth triode U6 are in the cut-off state, and the first electrical signal EST can control the on / off state of the ignition control switch U9 again.

[0100] Next, the working principle of realizing the on-off threshold, the on-off delay threshold and the PWM signal Over duty or SCB fault protection is described as follows: Figure 5

[0101] (1), on-off threshold: the base voltage of the first triode U1 is determined by the first resistance R1, the second resistance R2, the third resistance R3 and the working state of the second triode U2, and the first resistance R1, the second resistance R2 and the third resistance R3 mainly generate the base reference voltage. When the first electrical signal EST is high, the second triode U2 is in the saturation region, the collector of the second triode U2 is pulled down to the ground, and the first resistance R1, the second resistance R2 and the third resistance R3 generate the base voltage V ref-off of the first triode U1. The voltage of the first electrical signal EST and the base voltage V ref-off ​When the first transistor U1 can be forward biased, the first transistor U1 enters the saturation region from the cut-off region, and the turn-off threshold V th-off = V ref-off -V BE ; when the first electrical signal EST is low, the second transistor U2 is in the cut-off region, and the collector voltage of the second transistor U2 provides an additional power supply path for the base of the first transistor U1 through the second resistor R2, and the base voltage V ref-on of the first transistor U1 is obtained by the first resistor R1 and the third resistor R3, and the voltage of the first electrical signal EST is compared with V ref-on When the first transistor U1 cannot be forward biased, the first transistor U1 enters the cut-off region from the saturation region, and the turn-on threshold V th-on = V ref-on -V BE .

[0102] (2) Turn-on and turn-off delay: the turn-on / turn-off state of the second transistor U2 is synchronized with the turn-on / turn-off state of the ignition control switch U9, and the delay control of the base voltage of the second transistor U2 is realized by using an RC circuit, so as to generate the turn-on / turn-off delay of the ignition control switch U9. When the first transistor U1 enters the cut-off region, the power supply voltage V IN charges the second capacitor C2 through the eighth resistor R8, the ninth resistor R9, and the fifth resistor R5, and when the voltage of the second capacitor C2 reaches the voltage at which the second transistor U2 starts to enter the saturation region, the voltage of the second capacitor C2 is charged to this value, and the time for charging to this value is the turn-on delay; when the first transistor U1 enters the saturation region, the second capacitor C2 is discharged through the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7, and when the voltage of the second capacitor C2 is lower than the voltage at which the second transistor U2 starts to enter the cut-off region, the second capacitor C2 is discharged to this value, and the time for discharging to this value is the turn-off delay.

[0103] (3), the protection circuit 300 can protect the first signal EST (such as PWM signal) over duty and SCB fault that can appear. When the fault occurs, the third capacitor C3 and the eleventh resistor R11 and the twelfth resistor R12 realize the maximum protection time control, ensure that the ignition control switch U9 is turned on for a certain time after the fault occurs and is automatically turned off, and the ignition coil Load is no longer ignited during the fault. Further, when this fault occurs at high temperature, the current flowing through the ignition control switch U9 is very large, at the same time, the designed protection time is tens of ms level, therefore, the power consumption of the ignition control switch U9 is high, which leads to the high junction temperature of the ignition control switch U9, if the turn-off time of the ignition control switch U9 is too long, there is a risk of overheating damage of the ignition control switch U9. The present application accelerates the turn-off of the ignition control switch U9 through the amplification subcircuit 340 (multi-stage amplification circuit), which can make the turn-off time of the ignition control switch U9 reach the us level, thereby reducing the risk of thermal damage of the ignition control switch U9, and further effectively improving the safety of the circuit.

[0104] Therefore, by reasonably selecting the electrical parameters (such as the resistance value of the resistor, the capacitance value of the capacitor, etc.) of each discrete device in the ignition coil control device provided by the present application, different opening and closing threshold values, opening and closing delay times and fault protection durations can be realized.

[0105] Embodiment four

[0106] Based on the same inventive concept, the present embodiment provides an ignition system, which comprises an ignition coil and the ignition coil control device according to any one of the embodiments.

[0107] Since the ignition system provided by the present application and the ignition coil control device provided by the present application belong to the same inventive concept, the ignition system provided by the present application at least has all the advantages of the ignition coil control device provided by the present application. For the detailed content of the beneficial effects of the ignition system provided by the present application, please refer to the related description of the beneficial effects of the ignition coil control device provided by the present application in the foregoing, which will not be repeated here.

[0108] It should be noted that, as can be understood by those skilled in the art, the ignition system provided by the present application does not make excessive limitation on the specific type of the ignition coil. For example, the ignition coil can be an open magnetic circuit type ignition coil or a closed magnetic circuit type ignition coil. Further, the present application does not make excessive limitation on the ignition system. For example, the ignition system can further comprise an ECU to control the ignition mode of the ignition coil through the ignition coil control device. Still further, the present application does not make limitation on the application of the ignition system. For example, the ignition system can be applied to a two-cylinder engine, a four-cylinder engine, a six-cylinder engine, etc. For another example, when applied to a four-cylinder engine, the ignition coil can be ignited simultaneously in groups or independently. It can be understood that the above is only an exemplary description of the ignition system provided by the present application. For more detailed content of the ignition system provided by the present application, please refer to the related technology known to those skilled in the art, which will not be described in detail herein due to the limited space.

[0109] Embodiment Five

[0110] Based on the same inventive concept, the present embodiment provides an engine comprising the ignition coil control device according to any one of the above embodiments or the ignition system according to the embodiments herein.

[0111] It should be noted that, as can be understood by those skilled in the art, the present application does not make excessive limitation on the type of the engine. Exemplarily, the type of the engine includes but is not limited to turbocharging (such as 1.8T, etc.), VTEC (variable valve timing and lift electronic control system), i-VTEC (intelligent variable valve timing and lift system), CVVT (continuous variable valve timing system), VVT (continuous variable valve timing engine), VVT-i (intelligent variable valve timing system), double VVT-i (double intelligent variable valve timing engine), and D-CVVT (double variable valve timing, variable intake system engine), etc. For more detailed content of the engine, please refer to the related technology known to those skilled in the art, which will not be described in detail herein due to the limited space.

[0112] In summary, the ignition coil control device, the ignition system and the engine provided by the present application have the following beneficial effects:

[0113] The ignition coil control device provided by the application can delay driving the ignition control switch to be in the on state when the first electric signal is greater than or equal to the first preset value, and delay driving the ignition control switch to be in the off state when the first electric signal is less than or equal to the second preset value, thereby meeting the on-off threshold and on-off delay requirements of the ignition coil on the ignition control circuit. Meanwhile, the ignition coil control device provided by the application can drive the ignition control switch to be in the off state when the duration of the first electric signal being greater than or equal to the first preset value reaches a preset duration, thereby effectively ensuring that the ignition coil does not ignite during a fault and achieving fault protection. By reasonably setting the parameters of the device, the ignition coil control device provided by the application can effectively reduce the power consumption of the ignition control switch and improve the performance and efficiency of the engine. Further, the ignition coil control device provided by the application includes an input comparison circuit, an input delay circuit, a protection circuit, and a driving circuit, thereby being easy to manage production by using a PCBA (Printed Circuit Board Assembly) process through discrete device design, and being able to produce corresponding ignition coil control devices for different requirements, thereby significantly reducing costs and improving production efficiency.

[0114] The ignition system and the engine provided by the application belong to the same inventive concept as the ignition coil control device provided by the application, and therefore at least have all the advantages of the ignition coil control device provided by the application. For the detailed content of the beneficial effects of the ignition system and the engine provided by the application, please refer to the relevant description of the beneficial effects of the ignition coil control device provided by the application above. Here, it will not be described one by one.

[0115] It should be noted that the apparatus and method disclosed in the embodiments herein can also be implemented in other ways. The apparatus embodiments described above are merely exemplary, and the flowcharts and block diagrams in the accompanying drawings show only one possible implementation of the apparatus, method and computer program product according to the embodiments herein. In this regard, each block in the flowcharts and block diagrams can represent a module, a procedure, or a part of a module or procedure that comprises one or more executable instructions for implementing the specified logic function. It should also be noted that in some alternative implementations, the functions noted in the boxes can occur out of the order noted in the flowcharts. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or in the reverse order, depending on the functionality involved. It will also be noted that each block in the block diagrams and / or flowchart illustrations, and combinations of blocks in the block diagrams and / or flowchart illustrations, can be implemented by special purpose hardware-based systems that are designed to perform the specified functions or acts or combinations of special purpose hardware and computer instructions.

[0116] In addition, the various functional modules in the embodiments herein can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0117] The above description is merely illustrative of the application and is not intended to limit the scope of the application. Any modifications, equivalent arrangements, or substitutions of the application by those with ordinary skill in the art, based on the above disclosure, are intended to be within the scope of the application. Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the application and equivalent technology, then they should be included in the scope of the application.

Claims

1. An ignition coil control device, characterized in that, include: The circuit includes an input comparator circuit, an input delay circuit, a protection circuit, and a drive circuit. The first terminal of the input comparator circuit, the first terminal of the protection circuit, and the first terminal of the drive circuit receive a power supply voltage. The control terminal of the input comparator circuit receives a first electrical signal. The second terminal of the input comparator circuit, the first terminal of the input delay circuit, and the second terminal of the protection circuit are coupled to a first node, and the input delay circuit receives the power supply voltage through the first node. The third terminal of the input comparator circuit, the second terminal of the input delay circuit, and the first control terminal of the drive circuit are coupled to a second node. The third terminal of the protection circuit and the second control terminal of the drive circuit are coupled to a third node. The second terminal of the drive circuit is coupled to the control terminal of the ignition control switch of the ignition coil. The ignition coil control device is configured to, when the first electrical signal is greater than or equal to a first preset value, delay driving the ignition control switch to a conducting state; when the first electrical signal is less than or equal to a second preset value, delay driving the ignition control switch to a turning-off state; and when the duration for which the first electrical signal is greater than or equal to the first preset value reaches a preset duration, drive the ignition control switch to a turning-off state.

2. The ignition coil control device according to claim 1, characterized in that, The input comparison circuit is configured to output a second electrical signal at the first node based on the supply voltage and the first electrical signal, wherein the second electrical signal is a first voltage signal when the first electrical signal is greater than or equal to the first preset value, and a second voltage signal when the first electrical signal is less than or equal to the second preset value; the input delay circuit is configured to output a third electrical signal at the second node after a delay based on the supply voltage and the second electrical signal, wherein the third electrical signal is a third voltage signal when the second electrical signal is the first voltage signal, and a fourth voltage signal when the second electrical signal is the second voltage signal; the driving circuit is configured to drive the ignition control switch to a conducting state based on the supply voltage when the third electrical signal is the third voltage signal, and to drive the ignition control switch to a turning state based on the supply voltage when the third electrical signal is the fourth voltage signal; The protection circuit is configured to output a fifth voltage signal at the third node according to the power supply voltage when the duration of the second electrical signal being the first voltage signal reaches the preset duration; the drive circuit is further configured to drive the ignition control switch to the off state if the fifth voltage signal is received.

3. The ignition coil control device according to claim 1, characterized in that, The input comparator circuit includes a first voltage divider circuit, a first transistor, and a first RC circuit. The first terminal of the first voltage divider circuit receives the supply voltage; the second terminal of the first voltage divider circuit is coupled to the second node; the third terminal of the first voltage divider circuit is coupled to the control terminal of the first transistor; the first terminal of the first transistor is coupled to the first node; the first terminal of the first RC circuit receives the first electrical signal and is coupled to the second terminal of the first transistor; the fourth terminal of the first voltage divider circuit and the second terminal of the first RC circuit are grounded; the first electrical signal includes a PWM signal. The first voltage divider circuit is configured to generate a control voltage for the first transistor based on the supply voltage and the voltage at the second node; the first transistor is configured to output a first voltage signal at the first node when the PWM signal is greater than or equal to the first preset value. When the PWM signal is less than or equal to the second preset value, a second voltage signal is output at the first node.

4. The ignition coil control device according to claim 3, characterized in that, The first voltage divider circuit includes a first resistor, a second resistor, and a third resistor. The first end of the first resistor is coupled to the supply voltage. The second end of the first resistor, the first end of the second resistor, the first end of the third resistor, and the control terminal of the first transistor are all connected together. The second end of the second resistor is coupled to the second node, and the second end of the third resistor is grounded.

5. The ignition coil control device according to claim 3, characterized in that, The first RC sub-circuit includes a first capacitor and a fourth resistor. The first terminal of the first capacitor, the second terminal of the first transistor, and the first terminal of the fourth resistor are coupled together to receive the first electrical signal. The second terminal of the first capacitor and the second terminal of the fourth resistor are grounded.

6. The ignition coil control device according to claim 3, characterized in that, The input comparator circuit further includes a diode and a first Zener diode. The cathode of the diode is coupled to the control terminal of the first transistor, the anode of the diode is coupled to the anode of the first Zener diode, and the cathode of the first Zener diode and the first terminal of the first RC sub-circuit are coupled to the second terminal of the first transistor.

7. The ignition coil control device according to claim 1, characterized in that, The input delay circuit includes a second transistor and a second RC sub-circuit. The first end of the second RC sub-circuit is coupled to the first node, the second end of the second RC sub-circuit is coupled to the control terminal of the second transistor, the first end of the second transistor is coupled to the second node, and the third end of the second RC sub-circuit and the second end of the second transistor are grounded. The second RC sub-circuit is configured to charge the second transistor through the supply voltage when the second electrical signal at the first node is the first voltage signal, causing the second transistor to enter the saturation region and output a third voltage signal at the second node; and to discharge the second transistor when the second electrical signal at the first node is the second voltage signal, causing the second transistor to enter the cutoff region and output a fourth voltage signal at the second node.

8. The ignition coil control device according to claim 7, characterized in that, The second RC sub-circuit includes a fifth resistor, a sixth resistor, a seventh resistor, and a second capacitor. The first end of the fifth resistor is coupled to the first node. The second end of the fifth resistor, the first end of the sixth resistor, and the first end of the second capacitor are coupled together. The second end of the sixth resistor and the first end of the seventh resistor are coupled to the control terminal of the second transistor. The second end of the second capacitor and the second end of the seventh resistor are grounded.

9. The ignition coil control device according to claim 1, characterized in that, The protection circuit includes a second voltage divider circuit, a time protection circuit, and an output circuit. The first terminal of the second voltage divider circuit, the first terminal of the time protection circuit, and the first terminal of the output circuit receive the power supply voltage. The second terminal of the second voltage divider circuit is coupled to the first node. The third terminal of the second voltage divider circuit is coupled to the control terminal of the time protection circuit. The second terminal of the time protection circuit is coupled to the control terminal of the output circuit. The second terminal of the output circuit is coupled to the third node. The third terminals of the time protection circuit and the third terminal of the output circuit are grounded. The second voltage divider circuit is configured to, when the second electrical signal at the first node is a second voltage signal, control the time protection circuit to be in a charging state according to the supply voltage, so as to turn off the control of the output sub-circuit to the second control terminal of the drive circuit; when the second electrical signal at the first node is a first voltage signal, control the time protection circuit to discharge according to the supply voltage, drive the output sub-circuit to output a fifth voltage signal at the third node, so that the drive circuit drives the ignition control switch to be in an off state.

10. The ignition coil control device according to claim 9, characterized in that, The second voltage divider circuit includes an eighth resistor and a ninth resistor. The first end of the eighth resistor receives the supply voltage. The second end of the eighth resistor, the first end of the ninth resistor, and the control terminal of the time protection sub-circuit are coupled together. The second end of the ninth resistor is coupled to the first node.

11. The ignition coil control device according to claim 9, characterized in that, The time protection sub-circuit includes a third transistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a third capacitor. The first terminal of the third transistor receives the supply voltage. The control terminal of the third transistor is coupled to the third terminal of the second voltage divider sub-circuit. The second terminal of the third transistor is coupled to the first terminal of the tenth resistor. The second terminal of the tenth resistor, the first terminal of the eleventh resistor, and the first terminal of the third capacitor are coupled together. The second terminal of the eleventh resistor and the first terminal of the twelfth resistor are coupled to the control terminal of the output sub-circuit. The second terminal of the third capacitor and the second terminal of the twelfth resistor are grounded.

12. The ignition coil control device according to claim 9, characterized in that, The output sub-circuit includes a thirteenth resistor and a fourth transistor. The first end of the thirteenth resistor receives the supply voltage. The second end of the thirteenth resistor and the first end of the fourth transistor are coupled to the third node. The control terminal of the fourth transistor is coupled to the second end of the time protection sub-circuit. The second end of the fourth transistor is grounded.

13. The ignition coil control device according to claim 9, characterized in that, The protection circuit further includes an amplification sub-circuit, the first terminal of which receives the power supply voltage, the control terminal of which is coupled to the second terminal of the output sub-circuit, the second terminal of which is coupled to the third node, and the third terminal of which is grounded.

14. The ignition coil control device according to claim 13, characterized in that, The amplification sub-circuit includes a fourteenth resistor, a fifth transistor, a fifteenth resistor, a sixth transistor, and a sixteenth resistor. The first terminal of the fourteenth resistor and the first terminal of the sixth transistor receive the supply voltage. The second terminal of the fourteenth resistor, the first terminal of the fifth transistor, and the first terminal of the fifteenth resistor are coupled together. The control terminal of the fifth transistor is coupled to the second terminal of the output sub-circuit. The second terminal of the fifteenth resistor is coupled to the control terminal of the sixth transistor. The second terminal of the sixth transistor is connected in series with the sixteenth resistor and then coupled to the third node. The second terminal of the fifth transistor is grounded.

15. The ignition coil control device according to claim 1, characterized in that, The drive circuit includes a third voltage divider circuit and a push-pull circuit. The first terminal of the third voltage divider circuit and the first terminal of the push-pull circuit receive the power supply voltage. The second terminal of the third voltage divider circuit is coupled to the first control terminal of the push-pull circuit. The third terminal of the third voltage divider circuit is coupled to the second node. The fourth terminal of the third voltage divider circuit and the second control terminal of the push-pull circuit are coupled to the third node. The second terminal of the push-pull circuit is coupled to the control terminal of the ignition control switch. The third terminal of the push-pull circuit is grounded.

16. The ignition coil control device according to claim 15, characterized in that, The third voltage divider circuit includes a seventeenth resistor, an eighteenth resistor, and a nineteenth resistor. The first end of the seventeenth resistor receives the power supply voltage. The second end of the seventeenth resistor and the first end of the eighteenth resistor are coupled to the first control terminal of the push-pull circuit. The second end of the eighteenth resistor and the first end of the nineteenth resistor are coupled to the second node. The second end of the nineteenth resistor is coupled to the third node.

17. The ignition coil control device according to claim 15, characterized in that, The push-pull circuit includes a seventh transistor, a twentieth resistor, and an eighth transistor. The first terminal of the seventh transistor receives the supply voltage. The control terminal of the seventh transistor is coupled to the second terminal of the third voltage divider circuit. The second terminal of the seventh transistor is connected in series with the twentieth resistor and then coupled to the first terminal of the eighth transistor and the control terminal of the ignition control switch. The control terminal of the eighth transistor is coupled to the third node. The second terminal of the eighth transistor is grounded.

18. The ignition coil control device according to claim 1, characterized in that, The ignition coil control device further includes a power supply circuit, which includes a 21st resistor, a 4th capacitor, a 2nd Zener diode, and a 5th capacitor. The first end of the 21st resistor and the first end of the 4th capacitor are used to receive the power supply voltage. The second end of the 21st resistor, the cathode of the 2nd Zener diode, and the first end of the 5th capacitor are coupled to a 4th node to output the power supply voltage. The second end of the 4th capacitor, the anode of the 2nd Zener diode, and the second end of the 5th capacitor are grounded.

19. An ignition system, characterized in that, It includes an ignition coil and an ignition coil control device as described in any one of claims 1 to 18.

20. An engine, characterized in that, Includes the ignition coil control device as described in any one of claims 1 to 18 or the ignition system as described in claim 19.

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