CN207161244U - The ignition control device that anti-ignition coil burns - Google Patents
The ignition control device that anti-ignition coil burns Download PDFInfo
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- CN207161244U CN207161244U CN201721085570.0U CN201721085570U CN207161244U CN 207161244 U CN207161244 U CN 207161244U CN 201721085570 U CN201721085570 U CN 201721085570U CN 207161244 U CN207161244 U CN 207161244U
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Abstract
The ignition control device that a kind of anti-ignition coil provided by the utility model burns; including ignition control circuit; the primary winding L1 connections of the ignition control circuit and ignition coil; primary winding L1 for controlling ignition coil is produced from induced electromotive force, and protects the blowout protection signal of control circuit output to control the primary winding L1 of ignition coil not to be produced from induced electromotive force during flame-out for receiving；Protect control circuit; its input is connected to the primary winding L1 of ignition coil ungrounded end; its output end is connected by the points of common connection between flameout switch S1 and the primary winding L1 and ground of ignition coil, is protected the control terminal of control circuit to be connected with ignition control circuit and is exported blowout protection signal to ignition control circuit；Even if flameout switch enters in misconnection under conditions of external power source, remain able to the work for making igniter continual and steady, effectively prevent the phenomenon for burning the primary winding of ignition coil because of the access of external power source from occurring, so as to improve the stability of whole igniter and unfailing performance.
Description
Technical Field
The utility model relates to a gasoline engine ignition especially relates to an ignition control device who prevents ignition coil burnout.
Background
The existing ignition device adopts the rotor rotation of a magneto, an induced electromotive force is induced on the stator of the magneto (namely, the primary ignition coil of an ignition coil), then a high voltage is output to a spark plug through the secondary coil of the ignition coil to complete ignition, in the whole process, the high-voltage induced electromotive force is generated on the primary ignition coil of the ignition coil through a control circuit, when the gasoline engine needs to be extinguished, the primary ignition coil of the ignition coil is short-circuited through an extinguishing switch to complete the extinguishing, however, in the actual use process, the situation that two ends of the extinguishing switch are mistakenly connected into an external power supply often exists, for example, a battery power supply of a vehicle is connected into two ends of the extinguishing switch, under the situation, the external power supply forms a discharge loop through the extinguishing switch and the primary coil of the ignition coil, because the resistance of the primary coil is smaller, the flowing current is extremely large, thereby the phenomenon that ignition coil's primary coil burns out takes place, however, external power supply is external again difficult to discover to cause final product life to be short, the fault rate is high.
Therefore, a new ignition device is needed to be provided, which can still make the ignition device continuously and stably work even if the flameout switch is mistakenly connected to the external power supply, and effectively prevent the phenomenon that the primary coil of the ignition coil is burnt due to the connection of the external power supply, thereby improving the stability and reliability of the whole ignition device, prolonging the service life of the ignition device, and effectively reducing the failure rate in the use process.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a prevent ignition coil's ignition control device that burns out, even flameout switch under the condition of mistake access external power source, still can make ignition device continuous stable work, effectively prevent to burn out the phenomenon of ignition coil's primary coil because of external power source's access and take place to improve whole ignition device's stability and reliability performance, prolong ignition device's life, effectively reduce the fault rate in the use.
The utility model provides an ignition control device for preventing ignition coil burnout, which comprises an ignition control circuit and a protection control circuit; wherein,
the ignition control circuit is connected with the primary coil L1 of the ignition coil and is used for controlling the primary coil L1 of the ignition coil to generate self-induced electromotive force and receiving a flameout protection signal output by the protection control circuit to control the primary coil L1 of the ignition coil not to generate self-induced electromotive force during flameout;
and the input end of the protection control circuit is connected to the non-grounding end of the primary coil L1 of the ignition coil, the output end of the protection control circuit is connected with the common connection point between the primary coil L1 of the ignition coil and the ground through a flameout switch S1, and the control end of the protection control circuit is connected with the ignition control circuit and outputs a flameout protection signal to the ignition control circuit.
Further, the protection control circuit comprises a diode D2, a diode D3, a diode D4, a capacitor C2, a resistor R6, a resistor R7, a resistor R8 and a triode Q6;
the anode of the diode D3 is used as the input end of the protection control circuit and is connected to the non-grounded end of the primary coil L1 of the ignition coil, the cathode of the diode D3 is connected to the anode of the diode D4 through the capacitor C2, and the cathode of the diode D4 is used as the output end of the protection control circuit and is connected with the common connection point between the primary coil L1 of the ignition coil and the ground through the flameout switch S1;
one end of the resistor R8 is connected to the anode of the diode D4, and the other end is connected to the anode of the diode D3;
the resistor R6 is connected to the cathode of the diode D3, the other end of the resistor R6 is connected to the anode of the diode D3 through the resistor R7, the base of the triode Q6 is connected to the common connection point between the resistor R6 and the resistor R7, the emitter of the triode Q6 is connected to the anode of the diode D3, the collector of the triode Q6 is connected to the cathode of the diode D2, and the anode of the diode D2 is connected to the protection control circuit as the control end of the protection control circuit.
Further, the protection control circuit further comprises a voltage regulator tube DW1 and a diode D1;
the anode of the voltage-stabilizing tube DW1 is connected to a common connection point between the primary coil L1 of the ignition coil and the ground, the cathode of the voltage-stabilizing tube DW1 is connected to the cathode of the diode D1, and the anode of the diode D1 is connected to the anode of the diode D3.
Further, the ignition control circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q4 and a transistor Q5; wherein, the triode Q4 is a PNP type triode;
one end of the resistor R1 is connected to a common connection point between a primary coil L1 of the ignition coil and the ground, the other end of the resistor R1 is connected to a non-grounding end of a primary coil L1 of the ignition coil through a resistor R2, a collector of the transistor Q1 is connected to a common connection point between a resistor R1 and a resistor R2, an emitter of the transistor Q1 is connected to a common connection point between a resistor R2 and a primary coil L1 of the ignition coil through a capacitor C1, a base of the transistor Q2 is connected to a common connection point between a resistor R1 and a resistor R2, an emitter of the transistor Q2 is connected to a common connection point between a resistor R2 and a primary coil L1 of the ignition coil, a collector of the transistor Q2 is connected to the ground through a resistor R3, a base of the transistor Q3 is connected to a collector of the transistor Q2, an emitter of the transistor Q2 is connected to an, the emitter of the triode Q4 is grounded, the base of the triode Q4 is connected to the collector of the triode Q3, the collector of the triode Q4 is connected to the base of the triode Q5, the collector of the triode Q5 is grounded, the emitter of the triode Q5 is connected with one end of a resistor R5, the other end of the resistor R5 is connected to the emitter of the triode Q3, and the common connection point between the emitter of the resistor R5 and the emitter of the triode Q5 is connected to the base of the triode Q1;
the base of the transistor Q4 is used as the input of the misfire-protection signal.
The utility model has the advantages that: through the utility model discloses, even flameout switch still can make the ignition continuously stable work under the condition of mistake access external power source, effectively prevents to burn out ignition coil's primary coil's phenomenon because of external power source's access and takes place to improve whole ignition device's stability and reliability performance, prolong ignition device's life, effectively reduce the fault rate in the use.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic diagram of the principle structure of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Fig. 3 is a diagram of an electromotive force waveform induced in the primary coil L1 of the ignition coil.
Detailed Description
Fig. 1 is a schematic diagram of the principle structure of the present invention, fig. 2 is a schematic circuit diagram of the present invention, as shown in fig. 2, DC represents an externally connected power supply, S2 represents a switch for externally connecting the power supply, L2 is a secondary coil of an ignition coil, and L1 is a primary coil of the ignition coil, i.e., a stator coil of a gasoline engine magneto; the utility model provides an ignition control device for preventing ignition coil burnout, which comprises an ignition control circuit and a protection control circuit; wherein,
the ignition control circuit is connected with the primary coil L1 of the ignition coil and is used for controlling the primary coil L1 of the ignition coil to generate self-induced electromotive force and receiving a flameout protection signal output by the protection control circuit to control the primary coil L1 of the ignition coil not to generate self-induced electromotive force during flameout;
protection control circuit, its input is connected in ignition coil ' S primary coil L1 ' S non-earthing terminal, its output is connected through flameout switch S1 and ignition coil ' S primary coil L1 and the tie point between the ground, protection control circuit ' S control end and ignition control circuit are connected and to ignition control circuit output flameout protection signal, through the utility model discloses, even flameout switch under the condition of mistake access external power source, still can make ignition continuously stable work, effectively prevent because of the phenomenon emergence of the access primary coil of burning ignition coil of external power source to improve whole ignition, prolong ignition ' S life, effectively reduce the fault rate in the use.
In this embodiment, the protection control circuit includes a diode D2, a diode D3, a diode D4, a capacitor C2, a resistor R6, a resistor R7, a resistor R8, and a transistor Q6;
the anode of the diode D3 is used as the input end of the protection control circuit and is connected to the non-grounded end of the primary coil L1 of the ignition coil, the cathode of the diode D3 is connected to the anode of the diode D4 through the capacitor C2, and the cathode of the diode D4 is used as the output end of the protection control circuit and is connected with the common connection point between the primary coil L1 of the ignition coil and the ground through the flameout switch S1;
one end of the resistor R8 is connected to the anode of the diode D4, and the other end is connected to the anode of the diode D3;
the resistor R6 is connected with the cathode of the diode D3, the other end of the resistor R7 is connected with the anode of the diode D3, the base of the triode Q6 is connected with the common connection point between the resistor R6 and the resistor R7, the emitter of the triode Q6 is connected with the anode of the diode D3, the collector of the triode Q6 is connected with the cathode of the diode D2, the anode of the diode D2 is used as the control end of the protection control circuit to be connected with the protection control circuit, and through the structure, due to the fact that the diode D4 conducts isolation on the external power source under the unidirectional effect, even if the external power source is connected, the ignition device can still work normally under the condition that the external power source is connected, reliable flameout in the flameout process can be effectively guaranteed, and the ignition device cannot be burnt out due.
In this embodiment, the protection control circuit further includes a voltage regulator DW1 and a diode D1;
the positive pole of the voltage-regulator tube DW1 is connected to a common connection point between a primary coil L1 of the ignition coil and the ground, the negative pole of the voltage-regulator tube DW1 is connected to the negative pole of the diode D1, and the positive pole of the diode D1 is connected to the positive pole of the diode D3.
In this embodiment, the ignition control circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q4, and a transistor Q5; wherein, the triode Q4 is a PNP type triode;
one end of the resistor R1 is connected to a common connection point between a primary coil L1 of the ignition coil and the ground, the other end of the resistor R1 is connected to a non-grounding end of a primary coil L1 of the ignition coil through a resistor R2, a collector of the transistor Q1 is connected to a common connection point between a resistor R1 and a resistor R2, an emitter of the transistor Q1 is connected to a common connection point between a resistor R2 and a primary coil L1 of the ignition coil through a capacitor C1, a base of the transistor Q2 is connected to a common connection point between a resistor R1 and a resistor R2, an emitter of the transistor Q2 is connected to a common connection point between a resistor R2 and a primary coil L1 of the ignition coil, a collector of the transistor Q2 is connected to the ground through a resistor R3, a base of the transistor Q3 is connected to a collector of the transistor Q2, an emitter of the transistor Q2 is connected to an, the emitter of the triode Q4 is grounded, the base of the triode Q4 is connected to the collector of the triode Q3, the collector of the triode Q4 is connected to the base of the triode Q5, the collector of the triode Q5 is grounded, the emitter of the triode Q5 is connected with one end of a resistor R5, the other end of the resistor R5 is connected to the emitter of the triode Q3, and the common connection point between the emitter of the resistor R5 and the emitter of the triode Q5 is connected to the base of the triode Q1;
the base electrode of the triode Q4 is used as the input end of the flameout protection signal, and the ignition coil can be ensured to work stably and reliably through the structure.
The working principle of the present invention is further described in detail as follows:
in fig. 2, although the external power supply DC is connected by mistake, the external power supply does not have a loop due to the unidirectional characteristic of the diode D4, and does not affect ignition or misfire.
And (3) ignition process: when the magneto of the gasoline engine works, an electromotive force is induced in a primary coil L1 (a stator coil of the magneto) of an ignition coil, the waveform of the electromotive force is shown in figure 3, when the current in the ignition coil L1 is small, the transistor Q2 is cut off, the transistor Q3, the transistor Q4 and the transistor Q5 are conducted, the induced electromotive force is stored in the primary coil L1 of the ignition coil in the form of a magnetic field through a circuit formed by the primary coil L1 of the ignition coil, a transistor Q5, and a resistor R5, when ignition occurs, as the current in coil L1 increases, transistor Q1 turns on, capacitor C1 charges, when the voltage of the capacitor C1 reaches the turn-on voltage of the transistor Q2, the transistor Q2 is turned on, and the base potential of the transistor Q3 is pulled low, and then the triode Q5 is cut off, at this time, the coil L1 generates self-induced electromotive force, and the self-induced electromotive force is amplified through a transformer structure consisting of the coil L2 and the coil L1 to form high voltage, and the high voltage is output to a spark plug for ignition.
The extinguishing process, when extinguishing is required, causes extinguishing switch S1 to close and conduct, when coil L1 induces an electromotive force of a positive half-cycle at point a, the capacitor C2 is charged through a loop formed by the diode D3, the capacitor C2, the diode D4 and the coil L1, when the electromotive force induced at a is a negative half cycle, the electric energy stored in the capacitor C2 is discharged through a loop formed by the resistor R6, the base-emitter of the triode Q6 and the resistor R8, and at the moment, the triode Q6 is conducted, after the conduction, the base electrode potential of the triode Q4 is pulled low, so that transistors Q4 and Q5 are kept off, and no self-induced electromotive force is generated on coil L1, thereby achieving the purpose of reliable flameout, and the cut-off of the triodes Q4 and Q5 and the cut-off of the ignition control loop, the coil L1 is not affected by an external power supply, and the safety of the primary coil of the ignition coil is ensured.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (4)
1. The utility model provides a prevent ignition control device that ignition coil burns out which characterized in that: the ignition control circuit and the protection control circuit are included; wherein,
the ignition control circuit is connected with the primary coil L1 of the ignition coil and is used for controlling the primary coil L1 of the ignition coil to generate self-induced electromotive force and receiving a flameout protection signal output by the protection control circuit to control the primary coil L1 of the ignition coil not to generate self-induced electromotive force during flameout;
and the input end of the protection control circuit is connected to the non-grounding end of the primary coil L1 of the ignition coil, the output end of the protection control circuit is connected with the common connection point between the primary coil L1 of the ignition coil and the ground through a flameout switch S1, and the control end of the protection control circuit is connected with the ignition control circuit and outputs a flameout protection signal to the ignition control circuit.
2. The ignition control device that prevents the ignition coil from being burned out according to claim 1, characterized in that: the protection control circuit comprises a diode D2, a diode D3, a diode D4, a capacitor C2, a resistor R6, a resistor R7, a resistor R8 and a triode Q6;
the anode of the diode D3 is used as the input end of the protection control circuit and is connected to the non-grounded end of the primary coil L1 of the ignition coil, the cathode of the diode D3 is connected to the anode of the diode D4 through the capacitor C2, and the cathode of the diode D4 is used as the output end of the protection control circuit and is connected with the common connection point between the primary coil L1 of the ignition coil and the ground through the flameout switch S1;
one end of the resistor R8 is connected to the anode of the diode D4, and the other end is connected to the anode of the diode D3;
the resistor R6 is connected to the cathode of the diode D3, the other end of the resistor R6 is connected to the anode of the diode D3 through the resistor R7, the base of the triode Q6 is connected to the common connection point between the resistor R6 and the resistor R7, the emitter of the triode Q6 is connected to the anode of the diode D3, the collector of the triode Q6 is connected to the cathode of the diode D2, and the anode of the diode D2 is connected to the protection control circuit as the control end of the protection control circuit.
3. The ignition control device that prevents the ignition coil from being burned out according to claim 2, characterized in that: the protection control circuit further comprises a voltage regulator tube DW1 and a diode D1;
the anode of the voltage-stabilizing tube DW1 is connected to a common connection point between the primary coil L1 of the ignition coil and the ground, the cathode of the voltage-stabilizing tube DW1 is connected to the cathode of the diode D1, and the anode of the diode D1 is connected to the anode of the diode D3.
4. The ignition control device that prevents the ignition coil from being burned out according to claim 1, characterized in that: the ignition control circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a triode Q5; wherein, the triode Q4 is a PNP type triode;
one end of the resistor R1 is connected to a common connection point between a primary coil L1 of the ignition coil and the ground, the other end of the resistor R1 is connected to a non-grounding end of a primary coil L1 of the ignition coil through a resistor R2, a collector of the transistor Q1 is connected to a common connection point between a resistor R1 and a resistor R2, an emitter of the transistor Q1 is connected to a common connection point between a resistor R2 and a primary coil L1 of the ignition coil through a capacitor C1, a base of the transistor Q2 is connected to a common connection point between a resistor R1 and a resistor R2, an emitter of the transistor Q2 is connected to a common connection point between a resistor R2 and a primary coil L1 of the ignition coil, a collector of the transistor Q2 is connected to the ground through a resistor R3, a base of the transistor Q3 is connected to a collector of the transistor Q2, an emitter of the transistor Q2 is connected to an, the emitter of the triode Q4 is grounded, the base of the triode Q4 is connected to the collector of the triode Q3, the collector of the triode Q4 is connected to the base of the triode Q5, the collector of the triode Q5 is grounded, the emitter of the triode Q5 is connected with one end of a resistor R5, the other end of the resistor R5 is connected to the emitter of the triode Q3, and the common connection point between the emitter of the resistor R5 and the emitter of the triode Q5 is connected to the base of the triode Q1;
the base of the transistor Q4 is used as the input of the misfire-protection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721085570.0U CN207161244U (en) | 2017-08-28 | 2017-08-28 | The ignition control device that anti-ignition coil burns |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721085570.0U CN207161244U (en) | 2017-08-28 | 2017-08-28 | The ignition control device that anti-ignition coil burns |
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| Publication Number | Publication Date |
|---|---|
| CN207161244U true CN207161244U (en) | 2018-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721085570.0U Active CN207161244U (en) | 2017-08-28 | 2017-08-28 | The ignition control device that anti-ignition coil burns |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042973A (en) * | 2018-10-15 | 2020-04-21 | 半导体元件工业有限责任公司 | Circuit and method for coil current control |
-
2017
- 2017-08-28 CN CN201721085570.0U patent/CN207161244U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042973A (en) * | 2018-10-15 | 2020-04-21 | 半导体元件工业有限责任公司 | Circuit and method for coil current control |
| CN111042973B (en) * | 2018-10-15 | 2022-05-27 | 半导体元件工业有限责任公司 | Circuit and method for coil current control |
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