阅读说明：本技术 点火驱动模块、点火驱动电路以及点火控制系统 (Ignition drive module, ignition drive circuit and ignition control system ) 是由 童彬 潘金献 于 2021-01-08 设计创作，主要内容包括：一种性能稳定、功能可靠的点火驱动模块,包括模块信号输入端和模块信号输出端,以及输入阻抗匹配单元,与所述的模块信号输入端相连接；输入信号处理单元,与所述输入阻抗匹配单元相连接；信号放大控制单元,包括第一控制输入端、第二控制输入端和控制输出端,所述的第一控制输入端与所述的输入信号处理单元相连接；功率开关,包括功率输入端、第一功率输出端、第二功率输出端,所述的功率输入端与所述的信号放大控制单元的控制输出端相连接,所述的第一功率输出端与信号放大控制单元的第二控制输入端直接相连接形成反馈并且通过一个电流反馈控制模块接地,所述的第二功率输出端与所述的模块信号输出端相连接。(An ignition driving module with stable performance and reliable function comprises a module signal input end, a module signal output end and an input impedance matching unit, wherein the input impedance matching unit is connected with the module signal input end; an input signal processing unit connected to the input impedance matching unit; the signal amplification control unit comprises a first control input end, a second control input end and a control output end, and the first control input end is connected with the input signal processing unit; the power switch comprises a power input end, a first power output end and a second power output end, wherein the power input end is connected with the control output end of the signal amplification control unit, the first power output end is directly connected with the second control input end of the signal amplification control unit to form feedback and is grounded through a current feedback control module, and the second power output end is connected with the module signal output end.)

1. An ignition driver module comprising a module signal input and a module signal output, comprising:

the input impedance matching unit is connected with the module signal input end;

an input signal processing unit connected to the input impedance matching unit;

the signal amplification control unit comprises a first control input end, a second control input end and a control output end, and the first control input end is connected with the input signal processing unit;

the power switch comprises a power input end, a first power output end and a second power output end, wherein the power input end is connected with the control output end of the signal amplification control unit, the first power output end is directly connected with the second control input end of the signal amplification control unit to form feedback and is grounded through a current feedback control module, and the second power output end is connected with the module signal output end.

2. The ignition driver module of claim 1, wherein: the signal amplification control unit comprises a third control input end, the power switch comprises a third power output end, and the third power output end and the third control input end are connected through a voltage control unit.

3. The ignition driver module of claim 2, wherein: the output end of the voltage control unit is grounded through a voltage feedback unit.

4. The ignition driver module of claim 1, wherein: the power switch comprises a fourth power output end, and the fourth power output end is grounded through an output protection circuit unit.

5. The ignition driver module of claim 1, wherein: the input impedance matching unit is grounded through an input protection circuit unit.

6. An ignition drive circuit characterized by: comprising an ignition driver module according to any one of claims 1 to 5, a transistor connected to said module signal output, said transistor having a base connected to the module signal output and a collector connected to an ignition coil.

7. The ignition drive circuit according to claim 6, characterized in that: the emitting stage of the triode is grounded through a sensing resistor, the ignition driving module is provided with a sensing voltage input end, and the sensing voltage input end is connected to the emitting stage of the triode.

8. The ignition drive circuit according to claim 6, characterized in that: the ignition coil comprises a primary coil and a secondary coil, wherein one end of the primary coil is connected with the base electrode of the triode, and the other end of the primary coil is connected with the voltage input end.

9. An ignition control system comprising an ECU, characterized in that: comprising an ignition driver circuit according to any one of claims 6-8, one of the ports of the ECU being connected to the module signal input.

10. The ignition control system according to claim 9, characterized in that: the ignition driving circuit comprises an ECU feedback unit for feeding back a signal to the ECU.

Technical Field

The invention relates to an ignition controller for controlling the work of an automobile ignition coil, in particular to a driving assembly design and packaging test application technology of an automobile ignition system.

Background

In an ignition system of an automobile engine, an ignition coil is an execution component for providing ignition energy for igniting air and fuel mixture in an engine cylinder, and is used for sending an ignition command and receiving a state feedback signal by a central control module. The special pulse booster based on the electromagnetic induction principle is characterized in that 8-16V low voltage is switched on and off according to a set frequency, so that 20-40KV voltage is generated on the secondary side of the booster, and electric sparks are generated through a spark plug. Due to the precise nature of ignition coils, ignition coils of different performance need to be matched with a special driving circuit to meet the requirements of functionality. At present, ignition modules in mainstream matching markets of the automobile industry are controlled by international major factories, and the independent research and development of domestic automobile parts and host matching application are limited.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide the ignition module for driving main components, packaging test application and improving the product protection function and the anti-interference capability.

In order to achieve the above object, the present invention provides an ignition driving module, which includes a module signal input terminal, a module signal output terminal, and an input impedance matching unit connected to the module signal input terminal; an input signal processing unit connected to the input impedance matching unit; the signal amplification control unit comprises a first control input end, a second control input end and a control output end, and the first control input end is connected with the input signal processing unit; the power switch comprises a power input end, a first power output end and a second power output end, wherein the power input end is connected with the control output end of the signal amplification control unit, the first power output end is directly connected with the second control input end of the signal amplification control unit to form feedback and is grounded through a current feedback control module, and the second power output end is connected with the module signal output end.

Preferably, the signal amplification control unit includes a third control input terminal, the power switch includes a third power output terminal, and the third power output terminal and the third control input terminal are connected through a voltage control unit.

Preferably, the output end of the voltage control unit is grounded through a voltage feedback unit.

Preferably, the power switch includes a fourth power output terminal, and the fourth power output terminal is grounded through an output protection circuit unit.

Preferably, the input impedance matching unit is grounded through an input protection circuit unit.

According to another aspect of the present invention, there is provided an ignition driving circuit, comprising the ignition driving module as described above, and a triode connected to the module signal output terminal, wherein the base of the triode is connected to the module signal output terminal, and the collector of the triode is connected to the ignition coil.

Preferably, the emitter of the triode is grounded through a sensing resistor, the ignition driving module is provided with a sensing voltage input end, and the sensing voltage input end is connected to the emitter of the triode.

Preferably, the ignition coil comprises a primary coil and a secondary coil, one end of the primary coil is connected with the base of the triode, and the other end of the primary coil is connected with the voltage input end.

According to another aspect of the present invention, there is provided an ignition control system comprising an ECU and an ignition driver circuit as described above, one of the ports of the ECU being connected to the module signal input.

Preferably, the ignition driving circuit comprises an ECU feedback unit for feeding back a signal to the ECU.

Due to the adoption of the technical scheme, the ignition driving module is stable in performance and reliable in function.

Drawings

FIG. 1 is a schematic block circuit diagram of an ignition driver module;

FIG. 2 is a circuit diagram of an ignition driver module;

FIG. 3 is a schematic diagram of an ignition driver module;

FIG. 4 is a wiring diagram of the packaging of the ignition driver module;

FIG. 5 is a schematic diagram of an application of an ignition driver module;

FIG. 6 is a schematic diagram of the relationship between dwell time and Hard Shutdown (HSD) of the ignition driver module;

FIG. 7 is a schematic diagram of the current signature output of the ignition driver module;

fig. 8 is an oscilloscope trace of the electrical characteristics of the ignition driver module.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

The invention relates to an ignition controller for controlling the work of an automobile ignition coil, which is called an ignition driving module and is used for controlling a charging circuit according to an ignition instruction sent by a central control module. The control chip IC is used for directly driving current and spark events of an ignition IGBT and a control coil, has the functions of current limiting, maximum on-time turn-off protection, primary current feedback signal output, EST signal filtering, anti-interference and the like, and is used for independently developing a matched host for the company; the main board integrated circuit is used for realizing the electrical control function of the power electronic switch of the ignition system according to the circuit layout design, and realizing the stable control of the electrical function according to the chip manufacture and the innovation of the main board circuit layout design.

The ignition module is designed and assembled to build the ignition coil according to the performance requirements of international standards, and can be used for multiple ignition coil products through strict tests (high temperature durability, cold and hot shock, open circuit test, cold and hot circulation durability, high and low temperature storage, three-temperature electrical performance test, electromagnetic compatibility EMC overvoltage protection/reverse voltage resistance/antistatic voltage resistance).

Referring to fig. 1 and 2, fig. 1 is a schematic circuit diagram of an ignition driver module, and fig. 2 is a circuit diagram of the ignition driver module. The ignition control system in the embodiment comprises an ECU and an ignition driving circuit, wherein one port of the ECU is connected with the module signal input end, and the ignition driving circuit comprises an ECU feedback unit for feeding back a signal to the ECU.

Ignition drive circuit, including ignition drive module, the triode that is connected with module signal output part, the base of triode is connected with module signal output part, the collecting electrode is connected with ignition coil, the transmitting stage of triode passes through sensing resistance ground connection, ignition drive module is provided with sensing voltage input end, sensing voltage input end is connected in the transmitting stage of triode, ignition coil includes primary coil and secondary coil, primary coil's one end is connected with the base of triode, the other end is connected with voltage input end.

The ignition driving module comprises a module signal input end, a module signal output end and an input impedance matching unit, and the input impedance matching unit is connected with the module signal input end; an input signal processing unit connected to the input impedance matching unit; the signal amplification control unit comprises a first control input end, a second control input end and a control output end, and the first control input end is connected with the input signal processing unit; the power switch comprises a power input end, a first power output end and a second power output end, wherein the power input end is connected with the control output end of the signal amplification control unit, the first power output end is directly connected with the second control input end of the signal amplification control unit to form feedback and is grounded through a current feedback control module, and the second power output end is connected with the module signal output end.

The signal amplification control unit comprises a third control input end, the power switch comprises a third power output end, the third power output end and the third control input end are connected through a voltage control unit, the output end of the voltage control unit is grounded through a voltage feedback unit, the power switch comprises a fourth power output end, the fourth power output end is grounded through an output protection circuit unit, and the input impedance matching unit is grounded through an input protection circuit unit.

FIG. 3 is a schematic diagram of an ignition driver module, and FIG. 4 is a wiring diagram of the packaging of the ignition driver module; the IC is an advanced ignition IGBT control IC designed to directly drive the ignition IGBT, control the current and spark events of the coil. The coil current is controlled via an input pin. When the single-ended input is driven high, the output of the IC is enabled to turn on the IGBT and begin charging the coil. The internal pull-down resistor of the input pin is connected to the ground. Its main characteristics include: single ended input to support ground moving interference rejection, signal line input buffer, input peak filter, operation from ignition or battery line, ground offset tolerance: the power supply circuit comprises a single-ended input, programmable maximum dwell time, current signal output, IGBT current limiting controlled through a Vsense pin, maximum closing time after hard shutdown, and SOP-8 package and RoHS compliance.

FIG. 5 is a schematic diagram of an ignition driver module, the ignition coil including a high pressure rod having a passage therein, a high pressure spring disposed in the passage, a high pressure connection end at the bottom of the high pressure rod, and an interconnection end at the top of the high pressure rod; the installation shell is connected at the interconnection end and comprises a coil assembly and a low-voltage head, wherein the coil assembly comprises a T-shaped iron core, a primary winding, a secondary framework sleeved outside the primary winding, a secondary winding wound on the secondary framework and a mouth-shaped iron core arranged outside the T-shaped iron core, and an integrated ignition module is arranged above the ignition coil assembly and connected to the low-voltage head assembly.

The scheme provides module built-in drive control independent development IC, copper substrate integrated circuit design and module packaging test application. The igniter module NH-741 is a shared igniter plastic package module matched with an ignition coil, a copper substrate is used as a circuit motherboard of the module, components are welded on the copper substrate to form a functional circuit through a mounting process, and the functional circuit is packaged into a whole through a plastic package process. The module is internally provided with an independently developed independent IC for controlling the on-off of an IGBT power tube, so that the current of a primary coil is controlled to be on and off, a secondary coil generates high voltage when the primary current is off, and the high voltage is loaded on a spark plug through a line to break down the spark plug for discharging and igniting. The module is controlled by an external input common-mode ignition signal, the IGBT power tube is switched on when the common-mode ignition signal is at a high level, and the IGBT power tube is switched off when the common-mode ignition signal is at a low level.

The plastic package ignition module has the characteristics of small volume, high mechanical strength, moisture resistance, good antistatic performance, light weight, strong ignition, sensitive reaction, strong anti-interference capability, space layout design advantages and the like, the power input end of the plastic package ignition module has an anti-surge protection function, the signal input end of the plastic package ignition module has a filtering anti-interference function, and the plastic package ignition module also has a primary current limiting function, parking protection, an ignition coil primary current permanent conduction protection function, a switch level control function, a heat dissipation strengthening function and stable electrical performance control. As a power electronic switch component for controlling the important components of an ignition system, a signal for controlling ignition is a square wave or magnetic pulse signal, the square wave or magnetic pulse signal is transmitted to a signal input end of an ignition module, and the power electronic switch is driven by shaping. The pulse width is used for controlling the on-time of the power electronic switch, the ignition coil current rises approximately exponentially after being turned on, the on-time is long, the power-off current is large, so that the ignition energy of the coil is controlled, and the turn-off time of the power electronic switch, namely the ignition time, is controlled by the trailing edge time of the pulse signal.

The application range is 1, the ignition module is suitable for working at a power supply voltage DC 6-18V;

2. working temperature range: -40 ℃ to 125 ℃;

3. the storage temperature is-40 ℃ to 150 ℃;

4. inputting a signal: 5V pulse square wave with working frequency of 1-200 Hz;

the technical parameters are shown in the table 1 (testing conditions B + =14V, ambient temperature is-40-125 ℃, Uin =5V, load is ignition coil; OE sample testing conditions B + =14V, 25 ℃, Uin = 5V)

TABLE 1

Fig. 6 is a schematic diagram of the relationship between dwell time and Hard Shutdown (HSD) for an ignition driver module, with input of a single-ended input signal and a peak filter, when the input signal voltage reaches VInh, the IGBT will be turned on to charge the coil, when the input voltage is lower than VINL, the coil current through the IGBT will be turned off, the positive and negative peaks on the input line less than the tspike duration will be filtered out, and the IGBT will not be turned on/off, maximum dwell time, and Hard Shutdown (HSD). Fig. 7 is a schematic diagram of the current signature output of the ignition driver module. Fig. 8 is an oscilloscope trace of various electrical characteristic parameters of the ignition driver module in table 1.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto but may be implemented by those skilled in the art, and all equivalent changes and modifications made according to the spirit of the present invention are included in the scope of the present invention.