CN111102119B - Inductance type ignition system with flameout delay function - Google Patents
Inductance type ignition system with flameout delay function Download PDFInfo
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- CN111102119B CN111102119B CN201911350311.XA CN201911350311A CN111102119B CN 111102119 B CN111102119 B CN 111102119B CN 201911350311 A CN201911350311 A CN 201911350311A CN 111102119 B CN111102119 B CN 111102119B
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- resistor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/045—Layout of circuits for control of the dwell or anti dwell time
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention discloses an inductive ignition system with a flameout delay function, which comprises a boosting module, an ignition control module and a multi-stage amplification module, wherein the boosting module comprises an ignition coil, the ignition control module and the multi-stage amplification module are jointly used for controlling the ignition coil to generate high-voltage output, and the flameout delay module is used for prolonging the flameout function of the ignition system for a period of time. According to the inductance type ignition system with the flameout delay function, the problems of mistaken starting of a gasoline engine and incomplete flameout of the gasoline engine can be solved by adding the flameout delay circuit, and the safety of the inductance type ignition system is improved. Meanwhile, the flameout delay module is simple in structure and small in hardware cost.
Description
Technical Field
The invention relates to the field of small gasoline engines, in particular to an inductive ignition system with a flameout delay function, which is applied to small internal combustion gasoline engines, such as lawn mowers, brush cutters, hedge trimmers, chain saws and the like in the field of garden tools.
Background
The existing inductance ignition device (T.C.I) for the small gasoline engine such as the mower, the chain saw, the blower and the like generally adopts a primary coil to be connected with a flameout switch, the primary coil is directly short-circuited by grounding of the flameout switch, once the flameout switch is disconnected, the ignition is immediately recovered to be normal, and the flameout mode has great potential safety hazard in actual operation. For example, if the flameout switch is manually released, that is, the flameout switch is open-circuited, if the gasoline engine does not completely stop at this time, the induced electromotive force of the primary coil is continuously applied to the ignition control circuit to continue the ignition of the igniter, and the gasoline engine can immediately recover to normal operation, thereby causing the false start of the gasoline engine; when the flameout switch is in poor contact, the engine shakes and does not extinguish the fire.
The invention patent application with the publication number of CN 106988948A discloses an inductive igniter with a flameout self-locking function, which comprises an ignition wire consisting of a primary coil and a secondary coil, an ignition control circuit connected with the primary coil, a flameout self-locking circuit connected with the ignition control circuit and a circuit board, wherein the ignition control circuit is used for controlling the ignition wire to generate high-voltage pulses; the inductance type igniter with the flameout self-locking function can avoid the problems of mistaken starting of a gasoline engine and incomplete flameout of the gasoline engine by adding the flameout self-locking circuit.
However, the inductive igniter with the flameout self-locking function has the disadvantages of complex circuit structure, multiple components, troublesome delay time adjustment, poor process stability and large hardware cost. Therefore, how to realize effective and reliable flameout delay on the basis of introducing little additional hardware cost is a problem to be solved in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an inductive ignition system with a simple structure and a flameout delay function. After the flameout switch is grounded briefly, the induction voltage of the primary coil charges the second capacitor through the third diode, the second capacitor and the second diode, so that certain voltage is stored in the second capacitor, the second triode is guaranteed to be always in an open state, the output of high-voltage ignition is avoided, and the flameout effect is achieved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an inductive ignition system with flameout delay comprising:
the ignition control module and the multi-stage amplification module are jointly used for controlling the ignition coil to generate high-voltage output, and the flameout delay module is used for prolonging the flameout function of the ignition system for a period of time;
the ignition coil comprises a primary coil and a secondary coil, and the first end of the primary coil and the first end of the secondary coil are grounded in parallel;
the ignition control module comprises a first resistor, a second resistor, a third resistor, a fifth resistor, a first triode, a second triode, a first capacitor and a first diode; the first end of the first resistor is connected with the first end of the third resistor and the first end of the primary coil, the second end of the first resistor is connected with the first end of the second resistor, the anode of the first diode and the collector of the first triode, the second end of the second resistor is connected with the second end of the primary coil and the cathode of the first capacitor, the anode of the first capacitor is connected with the emitter of the first triode, the second end of the third resistor is connected with the collector of the second triode, the base of the second triode is connected with the cathode of the first diode, the emitter of the second triode is connected with the cathode of the first capacitor and the second end of the fifth resistor, and the first end of the fifth resistor is connected with the base of the first triode;
the multistage amplification module comprises a fourth resistor, a third triode, a fourth triode and a fifth triode; the first end of a fourth resistor is connected with the first end of a third resistor, the emitting electrode of a fourth triode and the collecting electrode of a fifth triode, the second end of the fourth resistor is connected with the base electrode of the fourth triode and the collecting electrode of the third triode, the collecting electrode of the fourth triode is connected with the base electrode of the fifth triode, the emitting electrode of the fifth triode is connected with the first end of the fifth resistor and the base electrode of the first triode, the emitting electrode of the third triode is connected with the second end of the fifth resistor, the negative electrode of the first capacitor and the second end of the second resistor, and the base electrode of the third triode is connected with the second end of the third resistor and the collecting electrode of the second triode;
the flameout delay module comprises a flameout switch, a sixth resistor, a second diode, a third diode and a second capacitor; the first end of the flameout switch is connected with the first end of the primary coil and the first end of the first resistor, the second end of the flameout switch is connected with the negative electrode of the second diode, the positive electrode of the second diode is connected with the negative electrode of the second capacitor and the first end of the sixth resistor, the positive electrode of the second capacitor is connected with the negative electrode of the first diode, the negative electrode of the third diode and the base electrode of the second triode, and the second end of the sixth resistor is connected with the positive electrode of the third diode, the negative electrode of the first capacitor and the second end of the second resistor.
Further, the first triode, the second triode, the third triode and the fifth triode are NPN type triodes, and the fourth triode is a PNP type triode.
Further, the matching of the first resistor, the second resistor and the third resistor is adjusted to enable the third triode to be conducted first.
Further, after the flameout switch is grounded briefly, the voltage induced by the primary coil passes through the third diode, the second capacitor and the second diode to charge the second capacitor, so that a certain voltage is stored in the second capacitor.
Further, when the capacitor stored in the second capacitor enables the second triode to be always in an open state, the ignition system is flameout, and otherwise, the ignition control module returns to normal.
Further, the sixth resistor is far larger than the resistances of the first resistor and the second resistor.
Compared with the prior art, the invention realizes the inductive ignition system with the flameout delay function, can avoid the problems of error start of a gasoline engine and incomplete flameout of the gasoline engine by adding the flameout delay circuit, and improves the safety of the inductive ignition system. Meanwhile, the flameout delay module is simple in structure, small in hardware cost and strong in process stability, and the problems that the existing delay circuit is complex in structure and expensive additional cost is introduced while delay is achieved are solved. Meanwhile, when the flameout switch is not triggered, the sixth resistor is far larger than the first resistor and the second resistor, so that the flameout delay module circuit cannot influence the normal ignition working state.
Drawings
FIG. 1 is a schematic block diagram of an inductive ignition system with flameout delay of the present invention:
fig. 2 is a schematic circuit diagram of the inductive ignition system with flameout delay function according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1, the present embodiment provides an inductive ignition system with flameout delay function, which includes:
the ignition device comprises a boosting module, an ignition control module, a multi-stage amplification module and a flameout delay module, wherein the boosting module comprises an ignition coil, the ignition control module and the multi-stage amplification module are jointly used for controlling the ignition coil to generate high-voltage output, and the flameout delay module is used for prolonging a period of flameout function of an ignition system.
Specifically, as shown in fig. 2, the ignition coil includes a primary coil and a secondary coil, a first end of the primary coil and a first end of the secondary coil are grounded in parallel;
the ignition control module comprises a first resistor R1, a second resistor R2, a third resistor R3, a fifth resistor R5, a first triode Q1, a second triode Q2, a first capacitor C1 and a first diode D1; a first end of a first resistor R1 is connected to a first end of a third resistor R3 and a first end of the primary coil, a second end of a first resistor R1 is connected to a first end of a second resistor R2, an anode of a first diode D1 and a collector of a first triode Q1, a second end of a second resistor R2 is connected to a second end of the primary coil and a cathode of a first capacitor C1, an anode of a first capacitor C1 is connected to an emitter of a first triode Q1, a second end of a third resistor R3 is connected to a collector of a second triode Q2, a base of the second triode Q2 is connected to a cathode of the first diode D1, an emitter of the second triode Q2 is connected to a cathode of the first capacitor C1 and a second end of a fifth resistor R5, and a first end of a fifth resistor R5 is connected to a base of the first triode Q1;
the multi-stage amplification module comprises a fourth resistor R4, a third triode Q3, a fourth triode Q4 and a fifth triode Q5; a first end of a fourth resistor R4 is connected with a first end of a third resistor R3, an emitter of a fourth triode Q4 and a collector of a fifth triode Q5, a second end of the fourth resistor R4 is connected with a base of a fourth triode Q4 and a collector of a third triode Q3, a collector of the fourth triode Q4 is connected with a base of the fifth triode Q5, an emitter of the fifth triode Q5 is connected with a first end of the fifth resistor Q5 and a base of the first triode Q1, an emitter of the third triode Q3 is connected with a second end of the fifth resistor Q5, a negative electrode of a first capacitor C1 and a second end of a second resistor R2, and a base of the third triode Q3 is connected with a second end of the third resistor R3 and a collector of the second triode Q2;
the flameout time delay module comprises a flameout switch S1, a sixth resistor R6, a second diode D2, a third diode D3 and a second capacitor C2; a first terminal of the extinction switch S1 is connected to the first terminal of the primary coil and the first terminal of the first resistor R1, a second terminal of the extinction switch S1 is connected to the negative electrode of the second diode D2, the positive electrode of the second diode D2 is connected to the negative electrode of the second capacitor C2 and the first terminal of the sixth resistor R6, the positive electrode of the second capacitor C2 is connected to the negative electrode of the first diode D1, the negative electrode of the third diode D3 and the base of the second triode Q2, and a second terminal of the sixth resistor R6 is connected to the positive electrode of the third diode D3, the negative electrode of the first capacitor C1 and the second terminal of the second resistor R2.
Specifically, the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fifth transistor Q5 are NPN transistors, and the fourth transistor Q4 is a PNP transistor.
The working principle of the induction type ignition system with flameout delay function, which generates high-voltage output, is similar to that of the traditional induction type ignition system, and specifically comprises the following steps:
when the engine rotates, the primary coil L1 cuts magnetic lines of force, and the primary coil L1 generates pulse electromotive force. Coil L1 (point a) is common (grounded).
When coil L1 (point B) generates a positive pulse: a loop is formed by the R2, the R1 and the coil L1, positive pulse electromotive force is released, and the triodes do not work in reverse directions and are in a cut-off state.
When coil L1 (point B) generates a negative pulse: when the rising edge of the pulse arrives, the point A is higher than the point B, B junction bias voltage is provided for the point A to the Q3 through the R3 resistor, c junction bias voltage is provided for the Q3 through the R4 resistor, and the transistor Q3 is firstly conducted. The point A also provides bias voltage for the Q2 b junction through R1 and D1, but because D1 forms a voltage drop, Q2 does not conduct first, and Q3 can conduct first by adjusting the matching of the resistances of R1, R2 and R3. After the Q3 is conducted, the voltage of a Q4 b junction is reduced, a bias voltage Q4 is provided for a Q4 b junction to be conducted, after the Q4 is conducted, the voltage of a Q5 b junction is increased, a bias voltage Q5 is provided for a Q5 b junction to be conducted, and a multi-stage amplification structure (in a dotted line in fig. 1) is formed by the Q3, the Q4 and the Q5. After Q5 is turned on, the voltage of the junction Q1 b rises to provide bias voltage for the junction Q1 b, the voltage of the junction C is provided for the junction Q1 through the R1 at the point A to turn on the Q1, a loop is formed after the voltage passes through the C1, and meanwhile, the C1 is charged. After Q1 is turned on, the voltage of the Q1 c junction drops, the bias voltage of the Q2 b junction drops, and Q2 keeps an off state.
All triodes maintain the working state, the pulse at the point B continuously rises at the moment, C1 is continuously charged, when the pulse at the point B approaches the peak value, the Q3, Q4 and Q5 form a multi-stage amplification current which is basically highest (in a dotted line in figure 1), and C1 keeps charging so that Q1 is cut off when the voltage difference between a node Q1B and a node e is lower than the conduction condition of Q1. After Q1 is cut off, the Q1 c junction voltage rises, a c junction bias voltage Q2 is supplied to Q2 through D1 and is turned on, after Q2 is turned on, the Q2 c junction voltage drops, the Q3 c junction bias voltage drops to cut off Q3, after Q3 is cut off, the Q3 c junction voltage rises, the Q4 b junction bias voltage rises to cut off Q4, after Q4 is cut off, the Q4 c junction voltage drops, and the Q5 b junction voltage drops to cut off Q5. At the moment, Q3, Q4 and Q5 of current amplification are simultaneously cut off instantly, so that large current on the primary coil of the L1 generates sudden change, and the primary coil and the secondary coil of the L1 generate follow current high-voltage output after mutual inductance.
At this time, the pulse voltage continuously drops due to the falling of the pulse, so that the voltage on the capacitor of C1 forms a loop by the reverse leakage R2 of Q1, the C1 is discharged, and the Q1e junction and the b junction are reversed to keep the Q1 in an off state. Q1 remains off, Q2 also remains on, Q3 remains off, Q4 remains off, and Q5 remains off.
When the next pulse comes, the working cycle is repeated to generate a high-voltage output. Because the coil L1B point of one turn of the magneto rotor only generates one negative pulse, the secondary coil L1 of one turn of the magneto rotor generates one output high voltage.
The invention relates to an inductive ignition system with a flameout delay function, which has the working principle of generating the flameout delay function and comprises the following steps:
when the extinguishing switch S1 is grounded briefly, the L1 induces a voltage across D3, C2, and D2 to charge C2, so that a certain voltage is stored on the C2 capacitor. Because the voltage on the C2 passes through the B, E pole of the Q2 and the R6, the triode Q2 is ensured to be always in an open state, so that the multistage amplification module at the later stage stops working, the output of high-voltage ignition is avoided, and the flameout effect is achieved. After 5-15 seconds, the voltage stored in the capacitor C2 is slowly reduced through the R6 until the transistor Q2 is not kept turned on, and the ignition control module returns to normal.
When the flameout switch is not triggered, because the resistance of R6 is far greater than that of R1 and R2, the flameout delay module circuit provided by the invention cannot influence the normal ignition working state.
Therefore, the induction type ignition system with the flameout delay function, which is provided by the invention, can avoid the problems of mistaken starting of a gasoline engine and incomplete flameout of the gasoline engine by adding the flameout delay circuit, and improves the safety of the induction type ignition system. Meanwhile, the flameout delay module is simple in structure, small in hardware cost and strong in process stability, and the problems that the existing delay circuit is complex in structure and expensive additional cost is introduced while delay is achieved are solved. Meanwhile, when the flameout switch is not triggered, the sixth resistor is far larger than the first resistor and the second resistor, so that the flameout delay module circuit cannot influence the normal ignition working state.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (6)
1. An inductance type ignition system with a flameout delay function comprises a boosting module, an ignition control module and a multi-stage amplification module, wherein the boosting module comprises an ignition coil, and the ignition control module and the multi-stage amplification module are jointly used for controlling the ignition coil to generate high-voltage output;
the ignition coil comprises a primary coil and a secondary coil, and the first end of the primary coil and the first end of the secondary coil are grounded in parallel;
the ignition control module comprises a first resistor, a second resistor, a third resistor, a fifth resistor, a first triode, a second triode, a first capacitor and a first diode; the first end of the first resistor is connected with the first end of the third resistor and the first end of the primary coil, the second end of the first resistor is connected with the first end of the second resistor, the anode of the first diode and the collector of the first triode, the second end of the second resistor is connected with the second end of the primary coil and the cathode of the first capacitor, the anode of the first capacitor is connected with the emitter of the first triode, the second end of the third resistor is connected with the collector of the second triode, the base of the second triode is connected with the cathode of the first diode, the emitter of the second triode is connected with the cathode of the first capacitor and the second end of the fifth resistor, and the first end of the fifth resistor is connected with the base of the first triode;
the multistage amplification module comprises a fourth resistor, a third triode, a fourth triode and a fifth triode; the first end of a fourth resistor is connected with the first end of a third resistor, the emitting electrode of a fourth triode and the collecting electrode of a fifth triode, the second end of the fourth resistor is connected with the base electrode of the fourth triode and the collecting electrode of the third triode, the collecting electrode of the fourth triode is connected with the base electrode of the fifth triode, the emitting electrode of the fifth triode is connected with the first end of the fifth resistor and the base electrode of the first triode, the emitting electrode of the third triode is connected with the second end of the fifth resistor, the negative electrode of the first capacitor and the second end of the second resistor, and the base electrode of the third triode is connected with the second end of the third resistor and the collecting electrode of the second triode;
the flameout delay module comprises a flameout switch, a sixth resistor, a second diode, a third diode and a second capacitor; the first end of the flameout switch is connected with the first end of the primary coil and the first end of the first resistor, the second end of the flameout switch is connected with the negative electrode of the second diode, the positive electrode of the second diode is connected with the negative electrode of the second capacitor and the first end of the sixth resistor, the positive electrode of the second capacitor is connected with the negative electrode of the first diode, the negative electrode of the third diode and the base electrode of the second triode, and the second end of the sixth resistor is connected with the positive electrode of the third diode, the negative electrode of the first capacitor and the second end of the second resistor.
2. The inductive ignition system of claim 1 wherein the first, second, third and fifth transistors are NPN transistors and the fourth transistor is a PNP transistor.
3. The inductive ignition system of claim 1 wherein the matching of the first, second and third resistors is adjusted to cause the third transistor to turn on first.
4. The inductive ignition system of claim 1 wherein when the kill-switch is briefly grounded, the voltage induced in the primary winding passes through the third diode, the second capacitor, and the second diode to charge the second capacitor, such that a voltage is stored on the second capacitor.
5. The inductive ignition system of claim 4 wherein the ignition system is turned off when the second transistor is always on by the capacitance stored on the second capacitor, otherwise the ignition control module returns to normal.
6. The inductive ignition system of claim 1 wherein the sixth resistor is substantially greater than the first and second resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911350311.XA CN111102119B (en) | 2019-12-24 | 2019-12-24 | Inductance type ignition system with flameout delay function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911350311.XA CN111102119B (en) | 2019-12-24 | 2019-12-24 | Inductance type ignition system with flameout delay function |
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| CN111102119A CN111102119A (en) | 2020-05-05 |
| CN111102119B true CN111102119B (en) | 2021-07-30 |
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| GB1533225A (en) * | 1976-05-28 | 1978-11-22 | Bosch Gmbh Robert | Ignition system |
| US5220901A (en) * | 1991-10-09 | 1993-06-22 | Mitsubishi Denki Kabushiki Kaisha | Capacitor discharge ignition system with inductively extended discharge time |
| CN201162611Y (en) * | 2008-03-19 | 2008-12-10 | 东风汽车有限公司 | Flameout delay controller for vehicle diesel engine |
| CN106988948A (en) * | 2017-04-10 | 2017-07-28 | 重庆力华自动化技术有限责任公司 | The inductance type ignitor of the flame-out auto-lock function of band |
| CN206722952U (en) * | 2017-03-02 | 2017-12-08 | 重庆力华自动化技术有限责任公司 | Inductance type ignitor with blowout protection function |
| CN108757263A (en) * | 2018-07-22 | 2018-11-06 | 重庆力华自动化技术有限责任公司 | Safety-type ignition controller for petrol engine |
| CN109372676A (en) * | 2018-12-28 | 2019-02-22 | 重庆瑜欣平瑞电子股份有限公司 | Integrated multifunctional universal igniter of gasoline engine |
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2019
- 2019-12-24 CN CN201911350311.XA patent/CN111102119B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1533225A (en) * | 1976-05-28 | 1978-11-22 | Bosch Gmbh Robert | Ignition system |
| US5220901A (en) * | 1991-10-09 | 1993-06-22 | Mitsubishi Denki Kabushiki Kaisha | Capacitor discharge ignition system with inductively extended discharge time |
| CN201162611Y (en) * | 2008-03-19 | 2008-12-10 | 东风汽车有限公司 | Flameout delay controller for vehicle diesel engine |
| CN206722952U (en) * | 2017-03-02 | 2017-12-08 | 重庆力华自动化技术有限责任公司 | Inductance type ignitor with blowout protection function |
| CN106988948A (en) * | 2017-04-10 | 2017-07-28 | 重庆力华自动化技术有限责任公司 | The inductance type ignitor of the flame-out auto-lock function of band |
| CN108757263A (en) * | 2018-07-22 | 2018-11-06 | 重庆力华自动化技术有限责任公司 | Safety-type ignition controller for petrol engine |
| CN109372676A (en) * | 2018-12-28 | 2019-02-22 | 重庆瑜欣平瑞电子股份有限公司 | Integrated multifunctional universal igniter of gasoline engine |
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