CN111779608A - High-frequency high-energy spark discharge ignition device - Google Patents
High-frequency high-energy spark discharge ignition device Download PDFInfo
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- CN111779608A CN111779608A CN202010622658.1A CN202010622658A CN111779608A CN 111779608 A CN111779608 A CN 111779608A CN 202010622658 A CN202010622658 A CN 202010622658A CN 111779608 A CN111779608 A CN 111779608A
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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
- F02P3/06—Other installations having capacitive energy storage
- F02P3/08—Layout of circuits
- F02P3/0876—Layout of circuits the storage capacitor being charged by means of an energy converter (DC-DC converter) or of an intermediate storage inductance
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention discloses a high-frequency high-energy spark discharge ignition device, and belongs to the technical field of ignition engines. The invention comprises a low-voltage vehicle-mounted power supply, a control module, a high-frequency discharge module, a high-energy supplement module and a spark plug; the low-voltage vehicle-mounted power supply supplies power to the whole system; the control module comprises logic allocation of control signals of the high-frequency discharge control module and the high-energy supplement module, and the discharge frequency and the discharge duration are accurately controlled; the high-frequency discharge module comprises a first capacitor, a second capacitor and a high-voltage coil and is used for providing high-frequency breakdown voltage; the first input end of the high-voltage coil is connected with the first capacitor discharge ignition output end, the first output end of the high-voltage coil is connected with the ground wire, the second input end of the high-voltage coil is connected with the outlet end of the high-voltage coil, and the second output end of the high-voltage coil is connected with the spark plug and the high-energy supplement module. The invention is applied to ignition of the ignition engine, improves the energy of the ignition device, and accurately controls the discharge frequency and the discharge time.
Description
Technical Field
The invention relates to the technical field of ignition engines, in particular to a high-frequency high-energy spark discharge ignition device.
Background
In order to further improve the emission performance and economic performance of a spark ignition type (gasoline) engine, lean combustion and exhaust gas recirculation combustion are key technical directions of a combustion system of the engine in the future. Along with the expansion of the combustion limit, the engine has partial combustion and even flameout phenomena, so that the combustion stability of the engine is seriously reduced. Secondly, lean combustion and exhaust gas recirculation combustion tend to accelerate flame propagation by increasing the velocity of airflow movement inside the combustion chamber, thus having a more severe impact on the effectiveness of the ignition system.
The ignition modes are various, and currently, the popular ignition modes include transistor discharge ignition (TCI), Capacitor discharge ignition (Capacitor discharge ignition), Microwave ignition (Microwave ignition), Laser ignition (Laser ignition), and the like. However, for practical engineering applications, only transistor discharge ignition and capacitor discharge ignition can stably provide ignition sources.
The transistor discharge ignition can increase ignition energy by increasing charging time, optimizing coil parameters, increasing charging voltage and the like. The capacitor discharge ignition can increase the ignition energy by increasing the discharge frequency, increasing the charge voltage and the like. However, these two ignition systems still suffer from their respective drawbacks and limitations. For transistor discharge ignition, the charging time is long, so that the energy improvement in the true sense is difficult to realize, and meanwhile, the discharge ignition for multiple times in a single cycle cannot be realized. For the capacitor discharge ignition system, the charging time is short, and higher discharge energy cannot be provided, so that lean combustion and exhaust gas recirculation combustion are not facilitated.
Accordingly, those skilled in the art have endeavored to develop a high-frequency high-energy spark discharge ignition device to solve the above problems.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problems to be solved by the present invention are the insufficient energy of the ignition device, the poor controllability of the discharge time, and the low discharge frequency of a single engine cycle. It is an object of the present invention to solve these problems.
In order to achieve the aim, the invention provides a high-frequency and high-energy spark discharge ignition device, which comprises a low-voltage vehicle-mounted power supply, a control module, a high-frequency discharge module, a high-energy supplement module and a spark plug, wherein the low-voltage vehicle-mounted power supply is connected with the control module; the low-voltage vehicle-mounted power supply supplies power to the whole system; the control module comprises logic allocation of control signals of a high-frequency discharge control module and a high-energy supplement module, and the discharge frequency and the discharge duration are accurately controlled; the high-frequency discharge module comprises a first capacitor, a second capacitor and a high-voltage coil and is used for providing high-frequency breakdown voltage; the first input end of the high-voltage coil is connected with the first capacitor discharge ignition output end, the first output end of the high-voltage coil is connected with a ground wire, the second input end of the high-voltage coil is connected with the high-voltage coil outlet end, and the second output end of the high-voltage coil is connected with the spark plug and the high-energy supplement module.
Further, the high-frequency discharge module may discharge 10 to 20 times per millisecond.
Further, the high energy supplement module provides 1000V-3000V DC voltage, which is directly connected across the spark plug.
Further, the high-energy supplement module comprises a high-frequency boosting module, a current anti-reflection module, a first MOS chip, a second MOS chip and a third MOS chip; the high energy replenishment module provides a high frequency control response of 10-20kHz to match the high frequency discharge process of the response.
Further, the high-energy supplement module accurately controls the discharge energy through the current anti-reflection module, the first MOS chip, the second MOS chip and the third MOS chip.
Further, the current anti-reverse module comprises a first high-voltage diode and a second high-voltage diode, the negative electrode of the first high-voltage diode is connected with the second output end of the high-voltage coil, the negative electrode of the second high-voltage diode is connected with the output end of the high-energy supplementary module, and the positive electrodes of the first high-voltage diode and the second high-voltage diode are connected to the center electrode of the spark plug.
Further, the high-voltage coil is composed of coils with low internal resistance, high voltage-raising ratio and large inductance.
Further, the internal resistance of the spark plug is 5k ohms.
Further, the low-voltage vehicle-mounted power supply is a 12V storage battery.
Furthermore, the capacity of the first capacitor and the second capacitor is 500NF-1UF, and the withstand voltage is respectively more than 500V and 3000V.
Compared with the prior art, the invention has the following technical effects:
1) the invention improves the energy of the ignition device, increases the discharge frequency of a single engine cycle, and can increase from one ignition to 10 to 20 times.
2) The ignition device can improve the ignition energy under the condition of improving the ignition frequency, the single cycle can provide the ignition frequency of 10kHz-20kHz, and the ignition energy reaches 200mJ-1000 mJ.
3) The ignition device can control the ignition frequency and the discharge time, and improve the control precision of the ignition system.
4) The ignition device can improve the lean combustion limit, enhance the capabilities of lean combustion and exhaust gas recirculation combustion, improve the thermal efficiency of the engine, reduce the emission and improve the fuel economy.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic structural diagram of a high frequency high energy spark discharge ignition device in accordance with a preferred embodiment of the present invention;
FIG. 2 is a control signal logic diagram of the present invention;
the device comprises a low-voltage vehicle-mounted power supply 1, a control module 2, a high-frequency discharge module 3, a high-energy supplement module 4, a spark plug 5, an energy management module 6, a first capacitor 31, a second capacitor 32, a high-voltage coil 33, a high-frequency boosting module 41, a current anti-reflection module 42, a first MOS (metal oxide semiconductor) chip 43, a second MOS chip 44, a third MOS chip 45, a first high-voltage diode 421 and a second high-voltage diode 422.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, a high-frequency high-energy spark discharge ignition device comprises a low-voltage vehicle-mounted power supply 1, a control module 2, a high-frequency discharge module 3, a high-energy supplement module 4, a spark plug 5 and an energy management module 6; the low-voltage vehicle-mounted power supply 1 is a 12V storage battery and supplies power to the whole system; the control module 2 comprises control signals of a high-frequency discharge control module 3 and a high-energy supplement module 4, and logic allocation, so that the discharge frequency and the discharge duration are accurately controlled; the high-frequency discharge module 3 comprises a first capacitor 31, a second capacitor 32 and a high-voltage coil 33, and is used for providing high-frequency breakdown voltage; the first input end of the high-voltage coil 33 is connected with the first capacitor discharge ignition output end, the first output end of the high-voltage coil 33 is connected with the ground wire, the second input end of the high-voltage coil 33 is connected with the outlet end of the high-voltage coil 33, and the second output end of the high-voltage coil 33 is connected with the spark plug 5 and the high-energy supplement module 4. The high-frequency discharge module 3 can discharge 10 to 20 times per millisecond. The high energy supplementary module 4 provides 1000V-3000V DC voltage, which is directly connected to the two ends of the spark plug 5. The high-energy supplement module 4 comprises a high-frequency boosting module 41, a current anti-reflection module 42, a first MOS chip 43, a second MOS chip 44 and a third MOS chip 45; the high-energy supplementary module 4 provides a high-frequency control response of 10-20kHz to match the high-frequency discharge process of the response. The high-energy supplement module 4 precisely controls the discharge energy through the current reverse prevention module 42, the first MOS chip 43, the second MOS chip 44 and the third MOS chip 45. The current reverse prevention module 42 comprises a first high-voltage diode 421 and a second high-voltage diode 422, wherein the cathode of the first high-voltage diode 421 is connected with the second output end of the high-voltage coil 33, the cathode of the second high-voltage diode 422 is connected with the output end of the high-energy supplement module 4, and the anodes of the first high-voltage diode 421 and the second high-voltage diode 422 are commonly connected to the center electrode of the spark plug 5. The high-voltage coil 33 is composed of a coil with low internal resistance, high step-up ratio and large inductance. The internal resistance of the spark plug 5 is 5k ohms. The capacity of the first capacitor 31 and the second capacitor 32 is 500NF-1UF, and the withstand voltage is respectively more than 500V-3000V.
The energy management module 6 increases the voltage of 12V to 1000V-3000V by the isolation type step-up transformer, provides a charging function for the second capacitor 32, increases the voltage of the second capacitor 32 to a target voltage, and continuously provides energy for the conductive path when the second capacitor 32 discharges, and the second capacitor 32 is an energy storage capacitor.
The current reverse prevention module 42 isolates a path between high voltage and low voltage, protects a circuit and prevents reverse transmission of current; the high-voltage diode of the current reverse prevention module 42 adopts an ultra-high withstand voltage fast recovery diode, and since the secondary voltage of the high-voltage coil 33 is high, a diode with withstand voltage of 30000V is required.
The high-voltage coil 33 is a high-speed coil, and the primary inductance is smaller under the condition of a certain boost ratio, so that the charging and discharging process can be realized more quickly.
The invention can quickly adjust the output voltage of the energy management module 6, provide different holding voltages according to different engine working conditions and provide corresponding ignition energy to the spark plug 5.
The control module 2 controls the logic sequence of the first MOS chip 43, the second MOS chip 44 and the third MOS chip 45, so as to realize the overall operation of the circuit.
The high-frequency boosting module 41 boosts the voltage of the 12V storage battery to 380V to charge the first capacitor 31; energy is transferred from the low-voltage vehicle-mounted power supply 1 to the energy management module 6 and the high-frequency boost module 41, the high voltage of the high-frequency boost module 41 is stored in the first capacitor 31 through the alternate conduction of the first MOS chip 43 and the second MOS chip 44, and the energy is finally transferred to the primary end of the high-voltage coil 33.
As shown in fig. 2, the MOSFETs 1, 2, and 3 represent signal plots of the first MOS chip 43, the second MOS chip 44, and the third MOS chip 45, respectively. The control sequence of the present invention is staged, first, the first MOS chip 43 is closed, the second MOS chip 44 is opened, and the high-frequency boost module 41 charges the first capacitor 31. At the same time, the third MOS chip 45 is closed to charge the second capacitor 32, and since the voltage of the energy management module 6 is very high, the second capacitor 32 is saturated in a very short time. At this time, the first MOS chip 43 is turned off, the second MOS chip 44 is turned on, the first capacitor 31 discharges to the primary side of the high-voltage coil 33, and a high voltage is generated at the secondary end of the high-voltage coil 33 to break down the mixture. When the conductive path of the spark plug 5 is formed, the second capacitor 32 discharges to the spark plug 5 to strengthen the ignition process and form high-frequency high-energy ignition, and the ignition frequency can reach 5-20kHz under general conditions and is obviously higher than that of the existing ignition system.
The ignition system of the invention has the advantages of larger energy, shorter discharge time and faster discharge frequency.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A high-frequency high-energy spark discharge ignition device is characterized by comprising a low-voltage vehicle-mounted power supply, a control module, a high-frequency discharge module, a high-energy supplement module and a spark plug; wherein the content of the first and second substances,
the low-voltage vehicle-mounted power supply supplies power to the whole system;
the control module comprises logic allocation of control signals of a high-frequency discharge control module and a high-energy supplement module, and the discharge frequency and the discharge duration are accurately controlled;
the high-frequency discharge module comprises a first capacitor, a second capacitor and a high-voltage coil and is used for providing high-frequency breakdown voltage;
the first input end of the high-voltage coil is connected with the first capacitor discharge ignition output end, the first output end of the high-voltage coil is connected with a ground wire, the second input end of the high-voltage coil is connected with the high-voltage coil outlet end, and the second output end of the high-voltage coil is connected with the spark plug and the high-energy supplement module.
2. The high frequency, high energy spark discharge ignition device of claim 1 wherein said high frequency discharge module discharges 10-20 times per millisecond.
3. The high frequency, high energy spark discharge ignition device of claim 1 wherein said high energy supplement module provides a dc voltage of 1000V to 3000V, directly across said spark plug.
4. The high-frequency high-energy spark discharge ignition device of claim 1, wherein the high-energy supplement module comprises a high-frequency boost module, a current anti-reflection module, a first MOS chip, a second MOS chip, and a third MOS chip; the high energy replenishment module provides a high frequency control response of 10-20kHz to match the high frequency discharge process of the response.
5. The high-frequency high-energy spark discharge ignition device of claim 4, wherein the high-energy supplement module precisely controls the discharge energy through the current anti-reflection module, the first MOS chip, the second MOS chip and the third MOS chip.
6. The high frequency high energy spark discharge ignition device of claim 4 wherein the current reversal prevention module includes a first high voltage diode and a second high voltage diode, the negative pole of the first high voltage diode is connected to the second output terminal of the high voltage coil, the negative pole of the second high voltage diode is connected to the output terminal of the high energy supplement module, and the positive poles of the first high voltage diode and the second high voltage diode are commonly connected to the center electrode of the spark plug.
7. The high frequency high energy spark discharge ignition device of claim 1 wherein said high voltage coil is comprised of a low internal resistance, high step-up ratio, high inductance coil.
8. The high frequency, high energy spark discharge ignition device of claim 1 wherein said spark plug internal resistance is 5k ohms.
9. The high frequency, high energy spark discharge ignition device of claim 1 wherein said low voltage on-board power supply is a 12V battery.
10. The high-frequency high-energy spark discharge ignition device according to claim 1, wherein said first capacitor and said second capacitor have a capacity of 500NF-1UF and withstand voltages of more than 500V and 3000V, respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010622658.1A CN111779608B (en) | 2020-06-30 | 2020-06-30 | High-frequency high-energy spark discharge ignition device |
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| CN202010622658.1A CN111779608B (en) | 2020-06-30 | 2020-06-30 | High-frequency high-energy spark discharge ignition device |
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| CN111779608A true CN111779608A (en) | 2020-10-16 |
| CN111779608B CN111779608B (en) | 2021-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217249A (en) * | 2021-04-22 | 2021-08-06 | 联合汽车电子有限公司 | Ignition control system, engine, ignition control method, and storage medium |
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| CN113217249A (en) * | 2021-04-22 | 2021-08-06 | 联合汽车电子有限公司 | Ignition control system, engine, ignition control method, and storage medium |
| CN113217249B (en) * | 2021-04-22 | 2022-08-12 | 联合汽车电子有限公司 | Ignition control system, engine, ignition control method, and storage medium |
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| CN111779608B (en) | 2021-09-24 |
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