CN115045788A - Fire-spraying-prevention controller and control method thereof - Google Patents
Fire-spraying-prevention controller and control method thereof Download PDFInfo
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- CN115045788A CN115045788A CN202210671962.4A CN202210671962A CN115045788A CN 115045788 A CN115045788 A CN 115045788A CN 202210671962 A CN202210671962 A CN 202210671962A CN 115045788 A CN115045788 A CN 115045788A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007921 spray Substances 0.000 claims description 6
- 238000010285 flame spraying Methods 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 19
- 230000000630 rising effect Effects 0.000 description 18
- 230000001174 ascending effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000003584 silencer Effects 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
-
- 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
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The application discloses a controller for preventing flame spraying and a control method thereof, which belong to the field of ignition devices for small gasoline engines. The high-voltage cap, the control assembly, the shell, the high-voltage wire and the iron core are fixedly arranged on the surface of the shell; the controller for preventing fire-spurting further comprises: the boosting coil group is arranged on the control assembly and is connected with the high-voltage wire; a charging coil configured to be disposed at an end of the control assembly opposite the booster coil assembly; the control assembly comprises an MCU power circuit and a signal acquisition circuit which are connected with the charging coil in parallel; the MCU power circuit is connected in series with the signal acquisition circuit; the MCU singlechip is connected with the MCU power circuit and the signal acquisition circuit in parallel; the MCU singlechip is connected with the boosting coil group in series through the ignition output circuit. The controller and the control method have the advantages that the controller is safe and capable of preventing fire spraying.
Description
Technical Field
The application relates to the field of ignition devices for small gasoline engines, in particular to a controller for preventing flame spraying and a control method thereof.
Background
A small AC generator using permanent magnet to generate magnetic field is an ignition power source in the ignition system of gasoline engine. The magneto ignition system consists of switch, ignition coil, breaker, capacitor, distributor and safety discharger, etc. it applies high voltage and generates spark plug distributed to each cylinder.
Patent No. (201610596138.1) is an ignition control method for igniting a free-piston linear generator; the ignition type free piston linear generator is formed by coupling two free piston type internal combustion engines and a linear motor; two free piston type internal combustion engines symmetrically arranged on the left side and the right side of the linear motor are respectively defined as a left internal combustion engine and a right internal combustion engine; the method is characterized in that: the ignition type free piston linear generator has different piston motion rules in the starting process and the power generation process, and the ignition system is controlled to ignite by adopting real-time piston displacement information in the starting process according to the piston motion rules and is controlled to ignite by adopting real-time piston displacement and speed information in the power generation process.
However, in the method, the motor starting process adopts real-time piston displacement information to control the ignition system to ignite; the method generally has limitations, and when the ignition time is inaccurate or the speed limiting mode is not correct, dangers such as engine runaway, muffler flaming, violent shaking and the like can be caused.
There is no controller that has a safe fire protection feature.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
To address the technical problems noted in the background section above, some embodiments of the present application provide a digital magneto control method of preventing sparking, a high voltage cap configured to mate with a spark plug;
the control assembly is used for controlling the high-voltage cap to generate current so as to control the ignition time of the spark plug;
a housing providing a cavity for mounting a control assembly;
the high-voltage wire is used for connecting the high-voltage cap and the control assembly;
a core configured to be fixedly disposed on a surface of the case;
the controller for preventing fire spraying and the control method thereof also comprise:
the boosting coil group is arranged on the control assembly and is connected with the high-voltage wire;
a charging coil configured to be disposed at an end of the control assembly opposite the booster coil assembly;
the control assembly comprises an MCU power circuit and a signal acquisition circuit which are connected with the charging coil in parallel; the MCU power circuit is connected in series with the signal acquisition circuit;
the MCU singlechip is connected with the MCU power circuit and the signal acquisition circuit in parallel; the MCU singlechip is connected with the boosting coil group in series through the ignition output circuit.
According to the working characteristics of the small gasoline engine, the MCU singlechip sets the ignition moment at the corresponding rotating speed and outputs the ignition moment through the ignition output circuit. Then the gas in the cylinder of the gasoline engine is ignited by high pressure output by the booster coil group 7, so that the purpose of ignition of an igniter is achieved; when the rotating speed of the motor reaches about 9500rpm, a first circle of large-angle (6.5-7.5 ℃) positions is ignited to a second circle of small-angle (-25-35 ℃) positions for ignition, and the rising of the rotating speed of the engine is restrained by too late ignition time; ignition control through jumping angle (for controlling machine to operate at specified speed limit rotating speed)
Further, the first step: before starting, the ignition time under the corresponding rotating speed is set through the MCU singlechip.
Step two: the speed limit range of the magneto is set when the rotating speed of the magneto is 9500rpm-10000 rpm.
Further, in the first step, according to the working characteristics of the small gasoline engine, the MCU singlechip sets the ignition moment at the corresponding rotating speed, and the ignition is realized when the rotating speed reaches the preset rotating speed of the MCU singlechip.
Further, forming an ignition curve according to the ignition time corresponding to each ignition rotating speed point; the double-curve ignition is adopted, and the ignition time is controlled by the two curves alternately.
Further, igniting at a first large-angle (6.5-7.5 ℃) position when the rotating speed of the motor reaches a speed limiting point of the magneto; and the second circle is ignited at a small angle (-25 to-35 degrees).
Furthermore, the igniter induces a group of alternating voltage signals, and the alternating voltage signals are processed by the igniter trigger signal acquisition circuit to provide ignition reference for the MCU. Meanwhile, the sensed signal is processed by the MCU power supply circuit to provide VCC voltage for the MCU to enable the MCU to work normally.
Further, according to the working characteristics of the small gasoline engine, the MCU singlechip sets the ignition time at the corresponding rotating speed and outputs the ignition time through the ignition output circuit; then the gas in the cylinder of the gasoline engine is ignited by the high pressure output from the booster coil group, so that the purpose of ignition of the igniter is achieved.
The beneficial effect of this application lies in: provided are a specific and safe controller for preventing a fire from being sprayed and a control method thereof.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it.
Further, throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that elements and elements are not necessarily drawn to scale.
In the drawings:
FIG. 1 is an overall schematic diagram according to an embodiment of the present application;
FIG. 2 is a circuit diagram of a control assembly;
fig. 3 is an ignition curve diagram composed of ignition timings corresponding to respective ignition rotational speed points.
Reference numerals:
1. a high-voltage cap; 2. a high-voltage line; 3. a control component; 4. a housing; 5. an iron core; 6. an epoxy material; 7. a booster coil group; 8. a charging coil; 9. MCU single chip; 10. an MCU power supply circuit; 11. a signal acquisition circuit; 12. and an ignition output circuit.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and the embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.
It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
It is noted that references to "a", "an", and "the" modifications in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that "one or more" may be used unless the context clearly dictates otherwise.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, a digital magneto for preventing a fire, includes: a high voltage cap 1 configured to mate with a spark plug; more specifically, the high-voltage cap 1 is inserted into the spark plug.
The control component 3 is used for controlling the high-voltage cap 1 to generate current so as to control the ignition time of the spark plug;
a housing 4 providing a cavity for mounting the control assembly 3; more specifically, the gap between the control component 3 and the space is filled with epoxy material 6.
The high-voltage wire 2 is fixedly connected with the high-voltage cap 1 at one end and the control assembly 3 at the other end; the high-voltage wire 2 is used for transmitting information sent by the control component 3 to drive the high-voltage cap 1 to generate high voltage.
A core 5 configured to be fixedly disposed on a surface of the case 4; more specifically, the core 5 is clearance fit to the flywheel in the magneto
The digital magneto for preventing fire spraying further comprises:
the boosting coil group 7 is arranged on the control component 3 and fixedly connected with the high-voltage wire 2; the booster coil winding is used to vary the voltage generated by the control assembly 3 so that the voltage input to the high voltage line 2 is sufficient for ignition.
A charging coil 8 configured to be provided at an end of the control assembly 3 opposite to the booster coil group 7; the control unit 3 is charged using the electromagnetic wave induction principle.
The control assembly 3 comprises an MCU power circuit 10 and a signal acquisition circuit 11 which are connected with the charging coil 8 in parallel; the MCU power circuit 10 is connected in series with the signal acquisition circuit 11; the MCU singlechip 9 is connected with the MCU power circuit 10 and the signal acquisition circuit 11 in parallel; the MCU singlechip 9 is connected with the boosting coil group 7 in series through an ignition output circuit 12.
A method of controlling a digital magneto to prevent fire-spurting, comprising:
the method comprises the following steps: before starting, setting ignition time at a corresponding rotating speed through the MCU single chip microcomputer 9;
step two: setting the rotating speed of the magneto at 9500-10000 rpm as the speed limit point of the magneto;
specifically, in the first step, according to the working characteristics of the small gasoline engine, the MCU singlechip 9 sets the ignition moment at the corresponding rotating speed, and the ignition is realized when the rotating speed reaches the preset rotating speed of the MCU singlechip 9.
Specifically, an ignition curve is formed according to the ignition time corresponding to each ignition rotating speed point; the double-curve ignition is adopted, and the ignition time is controlled by the two curves alternately.
Specifically, when the rotating speed of the motor reaches a speed limit point of a magneto, ignition is carried out at a first large-angle (6.5-7.5 ℃) position; more specifically, the ignition device is beneficial to more fully igniting the gasoline engine; the muffler at the exhaust of the gasoline engine is prevented from causing the danger of overhigh temperature and even flame spraying due to excessive insufficiently combusted gasoline; igniting at a second circle of small-angle (-25 to-35 degrees); suppressing the increase of the engine speed by the too late ignition timing; controlling the spark (7 ° → -25 °) by the jump angle facilitates controlling the machine to operate at the prescribed speed limit speed.
Specifically, a set of alternating voltage signals is induced by the igniter, and the signals are processed by the igniter trigger signal acquisition circuit 11 to provide an ignition reference for the MCU. Meanwhile, the sensed signal is also processed by the MCU power circuit 10 to provide VCC voltage for the MCU singlechip 9 to make the MCU singlechip work normally.
More specifically, according to the working characteristics of the small gasoline engine, the MCU singlechip 9 sets the ignition time at the corresponding rotating speed and outputs the ignition time through the ignition output circuit 12; then the gas in the cylinder of the gasoline engine is ignited by high pressure output by the booster coil group 7, so that the purpose of ignition by an igniter is achieved.
| Rotational speed | Ignition angle (Single curve) | Rotational speed | Ignition condition | |
| 2000 | 18 | Is in a rapid rising trend | |
|
| 4000 | 20 | Is in a rapid rising trend | |
|
| 6000 | 30 | Is in a rapid rising trend | |
|
| 8000 | 29 | Is in a rapid rising trend | Good effect | |
| 9000 | 31 | Is in a rapid rising trend | Good effect | |
| 9500 | 32 | Is in a rapid rising trend | Good effect | |
| 9800 | 34 | Is in a rapid rising trend | |
|
| 10000 | 35 | Is in a rapid rising trend | Good effect | |
| 9500 | 15 | In a slow rising trend | Good effect | |
| 9800 | 11 | In a slow rising trend | |
|
| 10000 | 8 | In a slow rising trend | Good effect | |
| 9500 | 7.5 | In a slow rising trend | Good effect | |
| 9800 | 7 | In a slow rising trend | Is good | |
| 10000 | 6.5 | In a slow rising trend | Is good |
As can be seen from the table I, when the rotating speed is 9500-10000, the ignition is performed by adopting a single-curve ignition angle (6.5-7.5 degrees), the ignition condition is good, but the rotating speed is in a slow rising trend, and the rotating speed is not restrained; the over-high rotating speed causes the runaway to be uncontrollably dangerous;
watch two
| Rotational speed | Ignition angle (Single curve) | Rotational speed | Ignition condition | |
| 2000 | 18 | In an ascending trend | |
|
| 4000 | 20 | In an ascending trend | |
|
| 6000 | 30 | In an ascending trend | |
|
| 8000 | 29 | In an ascending trend | Good effect | |
| 9000 | 31 | In an ascending trend | Good effect | |
| 9500 | 15 | In a slow rising trend | Flaming phenomenon | |
| 9800 | 5 | In a slow rising trend | Flaming phenomenon | |
| 10000 | -5 | In a slow descending trend | Flaming phenomenon | |
| 9500 | -10 | Stabilized near the speed limit point | Flaming phenomenon | |
| 9800 | -15 | Stabilized near the speed limit point | Flaming phenomenon | |
| 10000 | -20 | Stabilized near the speed limit point | Flaming phenomenon | |
| 9500 | -25 | Stabilized near the speed limit point | Flaming phenomenon | |
| 9800 | -30 | Stabilized near the speed limit point | Flaming phenomenon | |
| 10000 | -35 | Is stabilized atNear the speed limit point | Flaming phenomenon |
It can be known from the second table that when the rotation speed is 9500-10000, the rotation speed is in a descending trend by adopting the curve ignition angle (-25 to-35) for ignition,
the rotation speed is restrained; however, the fire spray phenomenon is generated when the temperature of the silencer is too high, and the fire spray phenomenon causes the danger of galloping;
watch III
Combining the ignition characteristics of the first table and the second table, and adopting hyperbolic ignition; the third table shows that when the rotating speed is 9500-10000, the first large angle (6.5-7.5 ℃) position of the hyperbolic ignition angle is ignited; igniting at a second circle of small-angle (-25 to-35 degrees); can realize the suppression
The flame spraying phenomenon caused by overhigh stability of the silencer can be prevented by the effect of the rotating speed; is beneficial to controlling the machine to operate at the specified speed limit rotating speed
Watch four
Through a plurality of experiments of a table IV, the hyperbolic ignition angle is controlled to be at a first large angle (6.5-7.5 degrees) for ignition; the second circle of small-angle (-25 to-35) degree position is ignited, thereby not only realizing the effect of inhibiting the rotating speed, but also preventing the phenomenon of flaming caused by overhigh stability of the silencer
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is made without departing from the inventive concept as defined above. For example, the above features and (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure are mutually replaced to form the technical solution.
Claims (7)
1. A fire protection controller comprising:
a high voltage cap configured to mate with a spark plug;
the control assembly is used for controlling the high-voltage cap to generate current so as to control the ignition time of the spark plug;
a housing providing a cavity for mounting the control assembly;
a high voltage line for connecting the high voltage cap and the control assembly;
a core configured to be fixedly disposed on a surface of the case;
the method is characterized in that:
the controller for preventing fire spray further comprises:
the boosting coil group is arranged on the control assembly and is connected with the high-voltage wire;
a charging coil configured to be disposed at an end of the control assembly opposite the boost coil assembly;
the control assembly comprises an MCU power circuit and a signal acquisition circuit which are connected with the charging coil in parallel; the MCU power circuit is connected with the signal acquisition circuit in series;
the MCU singlechip is connected with the MCU power circuit and the signal acquisition circuit in parallel; the MCU singlechip is connected with the boosting coil group in series through an ignition output circuit.
2. A method for controlling a controller for preventing a fire as set forth in claim 1, characterized in that:
the method comprises the following steps: before starting, setting ignition time at a corresponding rotating speed through the MCU singlechip;
step two: setting the ignition speed range of the magneto when the rotation speed of the magneto is 9500rpm-10000rpm (Range of speed limit) ；
Step three: forming an ignition curve according to the ignition time corresponding to each ignition rotating speed point; the double-curve ignition is adopted, and the ignition angle is controlled by the two curves alternately.
3. The digital magneto control method of claim 2, wherein:
the MCU singlechip sets up the moment of lighting a fire under corresponding rotational speed, realizes lighting a fire when the rotational speed reaches MCU singlechip and predetermines the rotational speed.
4. A control method of fire protection according to claim 3, characterized in that:
igniting the first large-angle (6.5-7.5 ℃) position when the rotating speed of the motor reaches the speed limit point of the magneto; and the second circle is ignited at a small angle (-25 to-35 degrees).
5. The control method for preventing a fire spray according to claim 4, characterized in that:
igniting the first large-angle 7-degree position when the rotating speed of the motor reaches the speed limit point of the magneto; the second turn was fired at a small angle-30.
6. The control method for preventing a fire spray according to claim 5, characterized in that:
the igniter induces a group of alternating voltage signals, and the alternating voltage signals are processed by the igniter trigger signal acquisition circuit to provide ignition reference for the MCU; meanwhile, the sensed signal is processed by the MCU power supply circuit to provide VCC voltage for the MCU to enable the MCU to work normally.
7. The control method for preventing a fire spray according to claim 6, characterized in that:
according to the working characteristics of the small gasoline engine, the MCU singlechip sets the ignition time at the corresponding rotating speed and outputs the ignition time through the ignition output circuit; then the gas in the cylinder of the gasoline engine is ignited by high pressure output by the booster coil group, so that the purpose of ignition by the igniter is achieved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210671962.4A CN115045788A (en) | 2022-06-14 | 2022-06-14 | Fire-spraying-prevention controller and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210671962.4A CN115045788A (en) | 2022-06-14 | 2022-06-14 | Fire-spraying-prevention controller and control method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5612054A (en) * | 1979-07-12 | 1981-02-05 | Mitsubishi Electric Corp | Magneto ignition device |
| CN201247979Y (en) * | 2008-07-16 | 2009-05-27 | 重庆宗申发动机制造有限公司 | Motorcycle engine magneto rotor |
| CN101867260A (en) * | 2010-07-13 | 2010-10-20 | 余姚市奥鑫电器有限公司 | Magneto capable of limiting speed |
| KR20120059686A (en) * | 2010-12-01 | 2012-06-11 | 현대자동차주식회사 | Control Method for Compensating Engine Knocking Using Integrated Hybrid Controller |
| TW201311998A (en) * | 2011-09-01 | 2013-03-16 | Kwang Yang Motor Co | Engine ignition control device |
| CN106705139A (en) * | 2017-02-11 | 2017-05-24 | 余凯凯 | Touch type intelligent burning machine |
| CN108005832A (en) * | 2017-11-07 | 2018-05-08 | 浙江锋龙电气股份有限公司 | A kind of high-precision ignition system of miniature gasoline engine |
| CN207945036U (en) * | 2017-11-07 | 2018-10-09 | 浙江锋龙电气股份有限公司 | A kind of high-precision ignition system |
| CN210769113U (en) * | 2019-09-11 | 2020-06-16 | 浙江锋龙电气股份有限公司 | High-precision ignition device with double trigger coils |
-
2022
- 2022-06-14 CN CN202210671962.4A patent/CN115045788A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5612054A (en) * | 1979-07-12 | 1981-02-05 | Mitsubishi Electric Corp | Magneto ignition device |
| CN201247979Y (en) * | 2008-07-16 | 2009-05-27 | 重庆宗申发动机制造有限公司 | Motorcycle engine magneto rotor |
| CN101867260A (en) * | 2010-07-13 | 2010-10-20 | 余姚市奥鑫电器有限公司 | Magneto capable of limiting speed |
| KR20120059686A (en) * | 2010-12-01 | 2012-06-11 | 현대자동차주식회사 | Control Method for Compensating Engine Knocking Using Integrated Hybrid Controller |
| TW201311998A (en) * | 2011-09-01 | 2013-03-16 | Kwang Yang Motor Co | Engine ignition control device |
| CN106705139A (en) * | 2017-02-11 | 2017-05-24 | 余凯凯 | Touch type intelligent burning machine |
| CN108005832A (en) * | 2017-11-07 | 2018-05-08 | 浙江锋龙电气股份有限公司 | A kind of high-precision ignition system of miniature gasoline engine |
| CN207945036U (en) * | 2017-11-07 | 2018-10-09 | 浙江锋龙电气股份有限公司 | A kind of high-precision ignition system |
| CN210769113U (en) * | 2019-09-11 | 2020-06-16 | 浙江锋龙电气股份有限公司 | High-precision ignition device with double trigger coils |
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Application publication date: 20220913 |