CN108005831A - A kind of high accuracy ignition system - Google Patents
A kind of high accuracy ignition system Download PDFInfo
- Publication number
- CN108005831A CN108005831A CN201711086315.2A CN201711086315A CN108005831A CN 108005831 A CN108005831 A CN 108005831A CN 201711086315 A CN201711086315 A CN 201711086315A CN 108005831 A CN108005831 A CN 108005831A
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- trigger signal
- ignition system
- mcu
- gasoline engine
- engine according
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- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000004146 energy storage Methods 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims 1
- 230000001052 transient effect Effects 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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
Landscapes
- 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 a kind of high-precision ignition system, including trigger signal filtering process module, for the first trigger signal A, the second trigger signal B and the 3rd trigger signal C to be delivered to MCU successively；The waveform interval time of the first adjacent trigger signal A is the required time value T that flywheel is rotated by 360 °；The waveform interval time of the first trigger signal B and the second trigger signal C are that flywheel rotates time value t required at N °.The present invention by the calculation of t knows that flywheel is closing on prefiring transient speed, and the spark delay value tried to achieve by t, which is more nearly, is actually subjected to evaluation, so as to fulfill the high precision design of ignition angle, actual ignition angle control precision ± 1 ° on the engine.
Description
Technical field
The present invention relates to a kind of high-precision ignition system, it is applied to small-sized internal combustion formula petrol engine, such as garden instrument
Grass trimmer, brush cutter, GREEB HEDGE MACHINE, chain saw in field etc..
Background technology
Traditional miniature gasoline engine uses MCU as key control unit with Digital igniter, is the normal work of gasoline engine
Make to provide suitable ignition signal, the periodic quantity to turn around by the rotation of magnetic flywheel at the time of it carries out ignition signal output calculates again
After obtain.The time of ignition which obtains can be met the requirements when high engine speeds are run, but when gasoline engine is starting
During with idle operating mode, the change fluctuation of petrol engine rotational speed is very big, different positions in the periodic process that the rotation of magnetic flywheel is turned around
The speed difference put is very big, because including the compression of gaseous mixture in cylinder in Gasoline Engine Working Process, magnetic flywheel in compression process
Rotating speed drastically decline, the time of ignition calculated after being rotated a circle at this time by magnetic flywheel can not meet engine needs
At the optimum igniting moment, the time of ignition deviation of igniter output is bigger, the fluctuation up and down of rotating speed when causing engine idling
Greatly, the time of ignition undesirable condition that precisely caused engine does not recoil when and starting.
The content of the invention
The present invention, can be with order to overcome the deficiencies of the prior art and provide a kind of miniature gasoline engine high-precision dot igniter system
Reach the accuracy value of engine actual ignition angle ± 1 °.
To achieve these goals, the present invention uses following technical scheme：A kind of high accuracy ignition system, including
Trigger signal filtering process module, for successively by the first trigger signal A, the second trigger signal B and the 3rd trigger signal C
It is delivered to MCU；
The waveform interval time of the first adjacent trigger signal A is the required time value T that flywheel is rotated by 360 °；
The waveform interval time of the first trigger signal B and the second trigger signal C are that flywheel rotates time value required at N °
t。
Further, power supply module is further included, it is sampled energy storage by the voltage waveform that charge coil senses, and is
MCU provides supply voltage during normal work.
Further, charge control module is further included, for when Speed of Reaction Wheels reaches preset value M, adjusting charge coil
It is delivered to the magnitude of voltage of MCU.
Further, the voltage waveform of the charge coil sensing includes first waveform and the second waveform, works as Speed of Reaction Wheels
During more than 5000rpm, the charge control module adjusting charge coil only senses second voltage waveform and is sampled energy storage.
Further, igniting energy-storage module is further included, is charged to charging capacitor, it includes diode D6, charging electricity
Hold C3.
Further, ignition control module, including silicon-controlled Q1 are further included, for controlling the charging capacitor C3 to be filled
Electric discharge.
Further, counnter attack die block is further included, can described in MCU controls when the phase ratio of T and t does not meet preset value
Control silicon Q1 is not turned on.
Further, the power supply module includes triode Q2.
Further, the charge control module includes base stage connection three pole of triode Q3, the triode Q2
The collector of pipe Q3.
Further, the waveform interval time of the first trigger signal B and the second trigger signal C rotate 60 ° for flywheel
The time value t of Shi Suoxu.
In conclusion the present invention has the following advantages：Present invention employs with the trigger module for calculating input, pass through t's
Calculation knows that flywheel is closing on prefiring transient speed, instantaneous velocity at this moment than whole circle average speed closer to point
Actual revolution value before firer's work, so the spark delay value that MCU is tried to achieve by t is more nearly and is actually subjected to evaluation, so as to fulfill
The high precision design of ignition angle, on the engine actual ignition angle control precision ± 1 °.
Brief description of the drawings
Fig. 1 is the mechanical structure schematic diagram of the present invention.
Fig. 2 is the principle of the present invention block diagram.
Fig. 3 is the circuit diagram of the embodiment of the present invention.
Fig. 4 is the voltage waveform view of the reference point of the embodiment of the present invention.
Fig. 5 is the MCU control flow charts of the embodiment of the present invention.
Embodiment
In order to make those skilled in the art be better understood from the present invention program, below in conjunction with the embodiment of the present invention
Attached drawing, carries out the technical solution in the embodiment of the present invention clear, complete description.
As shown in Figure 1, a kind of high accuracy ignition system, its exterior mechanical structure include step-up coil group 1, trigger winding 2,
Iron core 3, MCU control systems 4, charge coil 5, magnetic flywheel 6 and other igniter universal components.The ignition system uses
MCU cores in order to control, ignition signal is provided for the work of engine；When the magnetic flywheel rotates counterclockwise, pass through magnetic field
Change, produces induction voltage waveform on charge coil and trigger winding, the phase of inductive waveform and the actual magnetic of flywheel on coil
The position of pole is into correspondence.
As shown in Fig. 2, the MCU control systems 4 include igniting energy-storage module, ignition control module, counnter attack die block, are
MCU provides the trigger signal filtering process module for calculating control, signal acquisition module, computing module, output control module, is
MCU provides the power supply module of working power, the charge control module for MCU regulation voltage levels.
Specifically, trigger signal filtering process module, including trigger winding, for successively by the first trigger signal A, second
Trigger signal B and the 3rd trigger signal C are delivered to MCU；
The waveform interval time of the first adjacent trigger signal A is the required time value T that flywheel is rotated by 360 °；
The waveform interval time of the first trigger signal B and the second trigger signal C are that flywheel rotates time value required at N °
t。
Single trigger winding design, it is ensured that the input signal into MCU is more accurate, improves on traditional circuit
The VDD that powers at the same time shine into phase offset, provide accurate benchmark for the high-precision ignition control of MCU controls.
The power supply module, it is sampled energy storage by the voltage waveform that charge coil senses, normal work is provided for MCU
Supply voltage when making.In this present embodiment, the voltage waveform of the charge coil sensing includes first waveform and the second waveform,
When Speed of Reaction Wheels is more than 5000rpm, the charge control module adjusting charge coil only senses second voltage waveform and is taken
Sample energy storage.
The charge control module, for when Speed of Reaction Wheels reaches preset value M, adjusting charge coil and being delivered to MCU's
Magnitude of voltage.
The voltage waveform sensed by charge coil samples energy storage and provides the MCU VDD of normal work, because charge coil sense
The voltage energy answered is strong, it is ensured that magnetic flywheel, which just can produce enough voltage rotating compared with low speed when, ensures MCU just
Often work.Rotated at a high speed in magnetic flywheel at the same time（Speed of Reaction Wheels is more than 5000rpm）When, the voltage of charge coil sensing at this time is complete
The normal work of enough VDD, MCU adjust charge coil to the magnitude of voltage of VDD by charge control module, can make charging
Coil-induced portion of energy is used to sample energy storage, and test data shows, by adjusting charge control when magnetic flywheel rotates at a high speed
The setting of module, the ignition energy lifting 10% that high-pressure side can be produced, increasing ignition performance.
The igniting energy-storage module, charges charging capacitor, it includes diode D6, charging capacitor C3.
The ignition control module, including silicon-controlled Q1, for controlling the charging capacitor C3 to carry out discharge and recharge.
The counnter attack die block, when the phase ratio of T and t does not meet preset value, MCU controls the silicon-controlled Q1 not lead
It is logical.
Specifically, the trigger signal filtering process module includes trigger winding, the both ends of trigger winding are respectively connected to
MCU。
As shown in figure 4, the circuit diagram of the one of which embodiment for MCU control systems of the present invention；
The ignition control module includes resistance R6, R7 and silicon-controlled Q1；
The igniting energy-storage module includes charge coil, diode D5, D6 and capacitance C3；
The power supply module includes resistance R8, R9, R10, R13, triode Q2, diode D7, D8, D9, capacitance C4, C5；
The trigger signal filtering process module includes trigger winding, diode D1, D2, D3, D4, resistance R1, R2, R4, R5, electricity
Hold C1, C2；
The charge control module includes resistance R11, R12 and triode Q3；
Described charge coil one end connects the anode of D5 and the cathode of D6 respectively, the plus earth of D5, and the anode connection of D6 is controllable
The anode of silicon Q1 and one end of capacitance C3, the control pole of Q1 are respectively connected to one end of resistance R6, R7, silicon-controlled cathode and electricity
The other end of resistance R7 is grounded together, and the other end of R6 is connected to the GP0 pins of MCU.
The other end of the charge coil is respectively connected to the anode of D7, the C poles of Q2 and one end of R8, the other end point of R8
R9 one end and one end of R10, R9 other ends ground connection are not connected to, and the other end of R10 is respectively connected to B poles and the C of Q3 of Q2
Pole；The B poles of Q3 connect one end of R11 and one end of R12, the other end of R12 and the E poles ground connection of Q3 respectively；One end of R11 connects
The GP4 mouths of MCU are connect, the E poles of Q2 are connected to the cathode of D8, and the anode of D8 is respectively connected to the cathode of C4 and one end of R13； R13
The other end connect the VDD mouths of the anode of D9, one end of C5 and MCU, the other end ground connection of C4, C5 and D9 respectively.
One end of the trigger winding is connected to the anode of D1 and one end of R1, and the other end of R1 connects R2, C1 respectively
The GP5 mouths of one end, the anode of D3 and MCU；The cathode of D1, the cathode of D3, the other end of the other end of R2 and C1 are grounded；
The other end of the trigger winding is respectively connected to the anode of D2 and one end of R4, and the other end of R4 is respectively connected to R5
One end, one end of C2, the GP1 mouths of the anode of D4 and MCU, the cathode of D2, the cathode of D4, the other end of R5 and C2 it is another
End is grounded.
The specific course of work and principle are as follows：
Protect MCU normal works.
The b points that charge coil is rotated with the position of magnetic pole of flywheel also sense positive voltage, whole by diode D5
After shape, then by diode D6 energy storage to Ignition capacitor C3；At the same time the c points of trigger winding also induce voltage waveform,
After rectifier diode D2 rectifications, then by the filtering process circuit being made of R4, R5, C2, D4, by first voltage signal
A is input to the GP1 of MCU, and MCU revolves the adjacent first voltage signal for turning around and sampling according to flywheel（Wave A in figure）Waveform
Interval time, knows the periodic quantity T that current flywheel rotation is turned around；
GP1 senses wave A first, with the rotation of flywheel position of magnetic pole, finally senses tertiary voltage signal（Wave C in figure）；
With the rotation of flywheel, the d points of trigger winding also sense the second voltage signal B of forward direction, defeated after also passing through rectification and filtering
Enter the GP5 feet to MCU（Wave B in figure）.
MCU obtains time value t, then MCU is according to journey according to the interval between receiving input signal Wave B and Wave C
Sequence setting needs ignition angle requirement, carries out calculating the acquisition correct igniting demand moment using t, when MCU internal clockings
The spark delay moment reach after, MCU by GP0 export ignition control signal, by resistance R6, R7 control Q1 conducting, at this time it
Before be stored in electric energy on capacitance C3 and carry out abrupt release, the curent change of moment, passes through and high pressure is produced after step-up coil group uses
In igniting, engine is set to work.
The charge control module being wherein made of resistance R11, R12 and triode Q3, when flywheel rotary speed is relatively low,
MCU GP4 mouths output low level signal, be not turned on Q3, charge coil a points sensing two voltage waveforms by Q2 input to
C4 energy storage, ensures that MCU has enough voltage VDD during low speed, ensures MCU reliably workings.
When MCU, which recognizes rotating speed, is more than 5000RPM, because the vdd voltage of MCU ensures MCU normal works enough,
GP4 exports high-level control signal in advance at this time（See the GP4 waveforms of Fig. 3）, control triode Q3 to lead by resistance R11, R12
It is logical, so as to turn off triode Q2；So after charge coil a points inductive waveform arrives, because triode Q2 is off state,
So not to C4 charging energy-storings, so the induced voltage of coil a points does not reconnect the load circuit of charging C4, so that a points sense
Waveform is in light condition, the amplitude lifting of induced voltage, and the voltage amplitude of the induction point b of corresponding charge coil is also carried
Rise, so as to increase the electric energy stored on capacitance C3, the ignition energy of high speed may finally be made to lift 10% or so.
After the first inductive waveform of charge coil a points, MCU exports low level control signal, shut-off three by GP4
Pole pipe Q3, charges capacitance C4 by Q2 controls so as to the follow-up induced voltage of charge coil a points, is ensureing MCU just
Normal operating voltage.
And the flywheel that above-mentioned T is represented rotates a circle 360 ° of times needed, above-mentioned t is represented for trigger winding, flywheel
Upper magnetic pole rotates to the time of S poles needs from N poles, and generally 60 ° or so of N ° of the rotation angle of S poles mechanically is rotated to from N poles,
So T and t subtracts there are the phase ratio in actual machine, such as 60 °/360 °=1/6 when flywheel is carrying out air inlet compression travel
Under speed very serious situation, instantaneous speed suppression ratio is more serious, and the value of t will increase, so will become larger with the ratio of T,
MCU is contrasted by the ratio of both times at this time, can identify whether the current transient speed of flywheel drastically declines, and is declined
Amplitude, so as to start anti-recoil program setting, exported by ignition control mouth GP0 without igniting, it is therefore prevented that flywheel rotates
Abnormal ignition under abnormal conditions.
Compared to traditional circuit, the present invention is individually designed to be provided the power supply circuit of VDD for MCU and provides calculating and input
Trigger circuit.
The voltage waveform that the present invention is sensed by charge coil samples energy storage and provides the MCU VDD of normal work, because charging
Coil-induced voltage energy is strong, it is ensured that magnetic flywheel, which just can produce enough voltage rotating compared with low speed when, to be ensured
The normal work of MCU.At the same time when magnetic flywheel rotates at a high speed, the normal work of the fully sufficient VDD of voltage for sensing of charging, at this time
MCU controls the break-make of triode Q3 by GP4, adjusts charge coil to the magnitude of voltage of VDD；
By controlling the charge closing of Q2, the energy that charge coil senses can be made to be used to produce high pressure spot by capacitance C3 energy storage
Fire, test data show, are set when magnetic flywheel rotates at a high speed by the adjusting of MCU GP4, the igniting that can produce high-pressure side
Energy lift 10%, increasing ignition performance.
Individually trigger winding design at the same time, it is ensured that the input signal into MCU is more accurate, improves traditional electricity
The VDD that powers at the same time on road shine into phase offset, provide accurate benchmark for the high-precision ignition control of MCU controls.
Coordinate the design of the control circuit, it is ensured that the good low-speed performance of igniter, the low speed for improving engine open
Dynamic performance, while high-precision ignition angle can ensure the stability of engine idling.
Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments；It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, should all belong to the scope of protection of the invention.
Claims (10)
- A kind of 1. high accuracy ignition system, it is characterised in that：IncludingTrigger signal filtering process module, for successively by the first trigger signal A, the second trigger signal B and the 3rd trigger signal C It is delivered to MCU；The waveform interval time of the first adjacent trigger signal A is the required time value T that flywheel is rotated by 360 °；The waveform interval time of the first trigger signal B and the second trigger signal C are that flywheel rotates time value required at N ° t。
- A kind of 2. high-precision ignition system of miniature gasoline engine according to claim 1, it is characterised in that：Further include power supply Module, it is sampled energy storage by the voltage waveform that charge coil senses, supply voltage during normal work is provided for MCU.
- A kind of 3. high-precision ignition system of miniature gasoline engine according to claim 2, it is characterised in that：Further include charging Control module, for when Speed of Reaction Wheels reaches preset value M, adjusting the magnitude of voltage that charge coil is delivered to MCU.
- A kind of 4. high-precision ignition system of miniature gasoline engine according to claim 3, it is characterised in that：The charging wire The voltage waveform of circle sensing includes first waveform and the second waveform, when Speed of Reaction Wheels is more than 5000rpm, the charge control mould Block adjusting charge coil only senses second voltage waveform and is sampled energy storage.
- A kind of 5. high-precision ignition system of miniature gasoline engine according to claim 1, it is characterised in that：Further include igniting Energy-storage module, charges charging capacitor, it includes diode D6, charging capacitor C3.
- A kind of 6. high-precision ignition system of miniature gasoline engine according to claim 5, it is characterised in that：Further include igniting Control module, including silicon-controlled Q1, for controlling the charging capacitor C3 to carry out discharge and recharge.
- A kind of 7. high-precision ignition system of miniature gasoline engine according to claim 6, it is characterised in that：Further include counnter attack Die block, when the phase ratio of T and t does not meet preset value, MCU controls the silicon-controlled Q1 to be not turned on.
- A kind of 8. high-precision ignition system of miniature gasoline engine according to claim 2, it is characterised in that：The power supply mould Block includes triode Q2.
- A kind of 9. high-precision ignition system of miniature gasoline engine according to claim 8, it is characterised in that：The charging control Molding block includes the collector of the base stage connection triode Q3 of triode Q3, the triode Q2.
- A kind of 10. high-precision ignition system of miniature gasoline engine according to claim 9, it is characterised in that：Described first The waveform interval time of trigger signal B and the second trigger signal C are that flywheel rotates time value t required at 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086315.2A CN108005831B (en) | 2017-11-07 | 2017-11-07 | High-precision ignition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086315.2A CN108005831B (en) | 2017-11-07 | 2017-11-07 | High-precision ignition system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108005831A true CN108005831A (en) | 2018-05-08 |
| CN108005831B CN108005831B (en) | 2021-04-09 |
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ID=62051545
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711086315.2A Active CN108005831B (en) | 2017-11-07 | 2017-11-07 | High-precision ignition system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630424A (en) * | 2019-09-11 | 2019-12-31 | 浙江锋龙电气股份有限公司 | High-precision ignition system with double trigger coils and method |
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| CN206360839U (en) * | 2016-08-29 | 2017-07-28 | 浙江锋龙电气股份有限公司 | It is a kind of to simulate the gasoline engine ignition system controlled with digit complement |
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|---|---|---|---|---|
| CN1690407A (en) * | 2004-04-28 | 2005-11-02 | 沃尔布罗发动机使用有限责任公司 | Capacitor discharge ignition |
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| US7506634B2 (en) * | 2006-09-27 | 2009-03-24 | Keterex, Inc. | Ignition timing circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630424A (en) * | 2019-09-11 | 2019-12-31 | 浙江锋龙电气股份有限公司 | High-precision ignition system with double trigger coils and method |
| CN110630424B (en) * | 2019-09-11 | 2021-06-18 | 浙江锋龙电气股份有限公司 | High-precision ignition system with double trigger coils and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108005831B (en) | 2021-04-09 |
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