CN108757265A - A kind of engine start circuit - Google Patents
A kind of engine start circuit Download PDFInfo
- Publication number
- CN108757265A CN108757265A CN201810744756.5A CN201810744756A CN108757265A CN 108757265 A CN108757265 A CN 108757265A CN 201810744756 A CN201810744756 A CN 201810744756A CN 108757265 A CN108757265 A CN 108757265A
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- power supply
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- control
- engine
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- 238000010304 firing Methods 0.000 claims abstract description 50
- 230000005611 electricity Effects 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
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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
- F02P9/00—Electric spark ignition control, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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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 a kind of engine start circuits, and for providing enough voltage in engine start and work for plug ignition, the engine start circuit includes：Firing circuit, the boost in voltage of firing circuit will be accessed to the ignition voltage of spark plug；Magneto circuit accesses firing circuit by first switch；DC power supply circuit, including DC power supply and second switch, the DC power supply access firing circuit by second switch；Electronic control circuit to obtain the working condition of engine, and sends out control signal；Switching circuit receives control signal and by controlling the opening and closing of first switch and the second switch to control the break-make of DC power supply circuit and magneto circuit；Motor circuit is started, including the starting motor being installed on engine, the starting motor circuit is connected with electronic control circuit and receives control signal to control the start and stop of motor.
Description
Technical field
The present invention provides a kind of engine start circuit for lighting a fire to spark plug in the engine of gasoline engine.
Background technology
Currently, the engine of gasoline engine is started by pulling, then powered by magneto and to spark plug
Igniting.Magneto is that the small-sized alternating current generator in magnetic field is generated by permanent magnet, but at the starting initial stage of gasoline engine, due to
The rotating speed of engine is relatively low and unstable, therefore the voltage that magneto can be caused to provide is relatively low and unstable.In this case, fiery
The energy of spark plug ignition is just not achieved most preferably, especially starts under low temperature, cold state and just more has some setbacks.
Invention content
To solve the above-mentioned problems, the present invention proposes a kind of engine start circuit, in engine start and work
As when provide enough voltage for plug ignition, the engine start circuit includes：
Firing circuit, the boost in voltage of firing circuit will be accessed to the ignition voltage of spark plug；
Magneto circuit is connected to firing circuit；
DC power supply circuit, including DC power supply, the DC power supply are connected to firing circuit；
Motor circuit is started, including the starting motor being installed on engine；
In engine start-up phase, the starting motor work is started with booster engine, and the magneto circuit fails,
DC power supply circuit works for plug ignition；
In the engine work stage, the starting motor is stopped, the DC power supply circuit failure, magneto circuit
Work is for plug ignition.
As a further improvement on the present invention, the engine start circuit further includes：Electronic control circuit, to obtain
The working condition of engine, and control signal is sent out, the starting motor circuit is connected with electronic control circuit and receives control
Signal processed starts the start and stop of motor to control.
As a further improvement on the present invention, the engine start circuit further includes switching circuit, and the magnetoelectricity is electromechanical
Firing circuit is accessed in road by first switch, and the DC power supply circuit further includes second switch, and the DC power supply passes through the
Two switch access firing circuits, the switching circuit receive control signal and the opening and closing by controlling first switch and the second switch
To control the break-make of DC power supply circuit and magneto circuit；
In engine start-up phase, the electronic control circuit is controlled the starting motor work and is started with booster engine, and
And the switching circuit controls the second switch closure, first switch disconnects, the DC power supply circuit conducting is for spark
Plug igniting；
In the engine work stage, the electronic control circuit control starts motor and is stopped, and switching electricity
Road controls the first switch closure, second switch disconnects, and the magneto circuit conducting is for plug ignition.
As a further improvement on the present invention, the firing circuit includes the first level-one being connect with the magneto circuit
Coil, the second level-one coil being connect with DC power supply circuit and the secondary coil being connect with spark plug, the first level-one line
Circle and the second level-one coil are grounded respectively.
As a further improvement on the present invention, the firing circuit includes and the magneto circuit and DC power supply circuit
The level-one coil being all connected with and the secondary coil being connect with spark plug, the level-one coil are divided into two-way and are grounded respectively.
As a further improvement on the present invention, the switching circuit includes the first of electromagnet and control magnet switching
Switch element, the first switching element include the first control terminal, and the control signal includes switching signal；
First control terminal connect with electronic control circuit with receive switching signal and control first switching element conducting or
It disconnects, to realize the break-make of electromagnet.
As a further improvement on the present invention, the first switch and second switch are single-pole double-throw switch (SPDT), and are had
One end is hanging, and the electromagnet is arranged close to the first switch and second switch；
When the electromagnet is powered, the first switch disconnects, second switch conducting；
When the electromagnet power-off, the first switch conducting, second switch disconnects.
As a further improvement on the present invention, the firing circuit includes second switch element, the second switch element
It is connected with DC power supply circuit to control the spark rate that DC power supply lights a fire to spark plug；The second switch element
Including the second control terminal, the control signal includes spark rate signal, and second control terminal is connect with electronic control circuit
To receive igniting frequency signal and control being turned on or off for second switch element.
As a further improvement on the present invention, the second switch element is connected to DC power supply by the firing circuit
On circuit.
As a further improvement on the present invention, the magneto circuit accesses firing circuit by the first diode, described
DC power supply circuit further includes the second diode, and the DC power supply accesses firing circuit by the second diode；
In engine start-up phase, the electronic control circuit control is started motor work and is started with booster engine, and described the
Two diode current flows, the first diode disconnect, and the DC power supply circuit work is for plug ignition；
In the engine work stage, the electronic control circuit control starts motor and is stopped, first diode
Conducting, the second diode disconnect, and the magneto circuit work is for plug ignition.
As a further improvement on the present invention, the firing circuit includes and the magneto circuit and DC power supply circuit
The level-one coil being all connected with and the secondary coil being connect with spark plug, the level-one coil ground connection.
As a further improvement on the present invention, the DC power supply circuit further includes having ignition control circuit to control igniting
Frequency, the ignition control circuit are connected between DC power supply and the second diode.
As a further improvement on the present invention, the starting motor circuit includes starting motor and controlling starting motor to lead to
Disconnected third switch element, the third switch element include third control terminal, and the control signal includes motor control signal；
The third control terminal connect with electronic control circuit with receive motor control signal and control third switch element conducting or
It disconnects.
As a further improvement on the present invention, the electronic control circuit is connected with the starting motor is started with obtaining
The working condition of motor.
As a further improvement on the present invention, the DC power supply circuit further includes booster circuit, and the booster circuit connects
It is connected between DC power supply and firing circuit to boost to DC power supply.
Beneficial effects of the present invention：By switching magneto circuit and DC power supply circuit, when engine starts to start,
It is driven using DC power supply, to can ensure that spark plug can obtain enough ignition voltages, and under low temperature, cold state
It also can normal starting；After engine work, and switch to the driving of magneto voltage, more environmental protection and energy saving.So as to convenient
User uses.
Description of the drawings
Fig. 1 is the schematic diagram of the first embodiment of the invention；
Fig. 2 is the schematic diagram of second of embodiment of the invention；
Fig. 3 is the schematic diagram of the third embodiment of the invention.
100- engine start circuits；10- spark plugs；1- firing circuits；2- magneto circuits；3- DC power supply circuits；
31- booster circuits；32- DC power supplies；4- electronic control circuits；5- driving circuits；51- starting circuits；61- electromagnet；K1-
One switch；K2- second switches；Q1- first switching elements；Q2- second switch elements；Q3- third switch elements；D1- the one or two
Pole pipe；The second diodes of D2-；The first power supplys of V1-；V2- second sources；11- the first level-one coils；11 ', 11 ' '-level-one coil；
12- the second level-one coils；13,13 ', 13 ' '-secondary coil.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution in the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work, should all belong to protection of the present invention
Range.
In addition, the label repeated or mark may be used in various embodiments.These are repeated only for simple clear
The ground narration present invention, not representing has any relevance between the different embodiments or structure discussed.
As shown in Figure 1 to Figure 3, the present invention provides a kind of engine start circuits 100, in engine start and work
As when provide enough voltage so that spark plug 10 is lighted a fire, the engine start circuit 100 includes：
Firing circuit 1, the voltage for accessing firing circuit 1 to be risen to the ignition voltage of spark plug 10；The point of spark plug 10
Thermoelectricity pressure usually requires to reach volts up to ten thousand, and the voltage that can be directly obtained is unable to reach such height, it is therefore necessary to need ignition power
It boosts on road 1；
Magneto circuit 2, is connected to firing circuit 1, includes magneto in the magneto circuit 2, and magneto is a kind of profit
With the small-sized alternating current generator of permanent magnet；
DC power supply circuit 3, including DC power supply 32, the DC power supply 32 are connected to firing circuit 1；In present embodiment
In, the DC power supply circuit 3 further includes having booster circuit 31, and the booster circuit 31 is connected to DC power supply 32 and ignition power
To carry out first time boosting to DC power supply 32 between road 1, firing circuit 1 in turn carries out the DC power supply after boosting second
Boosting；In the present embodiment, the DC power supply 32 is about 7.2 V, reachable after the boosting of the first time of booster circuit 31
To about 200 V, thus using volts up to ten thousand are reached after second of the boosting of firing circuit 1；
Motor circuit is started, including the starting motor 51 being installed on engine, the flywheel for starting motor 51 and engine
Axis or bent axle are connected by deceleration mechanism with clutch, and at engine start initial stage, the starting motor 51 drives flywheel rotation
Turn to work with booster engine；
In engine start-up phase, the work of starting motor 51 is started with booster engine, and the magneto circuit 2 loses
Effect, the DC power supply circuit 3 are connected for plug ignition；
In the engine work stage, the starting motor 51 is stopped, and the DC power supply circuit 3 fails, the magnetic
Motor circuit 2 is connected for plug ignition.
The engine start circuit 100 further includes：Electronic control circuit 4, to obtain the working condition of engine, and
Control signal is sent out, the starting motor circuit is connected with the electronic control circuit 4 and receives control signal to have controlled
The start and stop of dynamic motor 51.
Specifically, as shown in Figures 1 and 2, the magneto circuit 2 accesses firing circuit 1 by first switch k1, described
DC power supply circuit 3 further includes second switch k2, and the DC power supply 32 accesses firing circuit 1 by second switch k2, described
Engine start circuit 100 further includes having switching circuit, and the switching circuit receives control signal and by controlling first switch
The opening and closing of k1 and second switch k2 are being started with controlling access or the open circuit of DC power supply circuit 3 and magneto circuit 2
When machine starts, the second switch k2 is closed, and first switch k1 is disconnected, after engine work, the first switch k1
It is closed, second switch k2 is disconnected.
In engine start-up phase, the electronic control circuit 4 controls the work of starting motor 51 with booster engine
It starts, and the switching circuit controls the second switch k2 closures, first switch k1 is disconnected, the DC power supply circuit 3
Conducting is lighted a fire for spark plug 10；
In the engine work stage, the control of the electronic control circuit 4 starts motor 51 and is stopped, and the switching
First switch k1 described in circuit control is closed, second switch k2 is disconnected, and the conducting of the magneto circuit 2 is for 10 points of spark plug
Fire.Since magneto can generate alternating current, to also have corresponding frequency, and light a fire to spark plug 10.
Further, the switching circuit includes electromagnet 61 and controls the first switching element Q1 of 61 break-make of electromagnet,
The first switching element Q1 includes the first control terminal, and the control signal includes switching signal；First control terminal and electricity
The connection of sub- control circuit 4 controls being turned on or off for first switching element Q1 to receive switching signal, to realize electromagnet
61 break-make.
Specifically, it further includes the first input that the switching circuit, which further includes the first power supply V1, the first switching element Q1,
End and the first output end, first output end ground connection, one end of the electromagnet 61 are connect with first input end, the other end and
First power supply V1 connections, the first power supply V1 are direct current.In the present embodiment, the first of the first switching element Q1
When control terminal does not receive switching signal, the first switching element Q1 conductings, electromagnet 61 is powered；The first control termination
When receiving switching signal, the first switching element Q1 is disconnected, and electromagnet 61 powers off.In the present embodiment, due to making electricity
Magnet 61 work needed for electric current to be achieved it is smaller, therefore the first switching element Q1 be triode.
In addition, in the present embodiment, the first switch k1 and second switch k2 are single-pole double-throw switch (SPDT), and one end
Be connected on circuit, the other end it is hanging, the electromagnet 61 is close to the first switch k1 and second switch k2 settings；Also,
When the electromagnet 61 is powered, the first switch k1 is disconnected, second switch k2 connections；When the electromagnet 61 powers off, institute
First switch k1 connections are stated, second switch k2 is disconnected.So as to control magneto circuit 2 by the break-make situation of electromagnet 61
With DC power supply circuit 3.
That is, when first control terminal does not receive switching signal, the first switching element Q1 is connected, then electromagnet 61
It is powered, first switch k1 is disconnected, and second switch k2 connections, the conducting of DC power supply circuit 3 is lighted a fire for spark plug 10；
When first control terminal receives switching signal, the first switching element Q1 is disconnected, then electromagnet 61 powers off, and first
Switch k1 connections, second switch k2 are disconnected, and the conducting of magnetoelectricity source circuit is lighted a fire for spark plug 10.
In addition, electromagnet 61 and first switch k1, second switch k2 in the switching circuit, be equivalent to constitute after
The structure of electric appliance, thus, if directly replacing above-mentioned first switch k1, second switch k2 and electromagnet using a relay
61, then it also can reach the purpose of the present invention.
Further, the firing circuit 1 includes second switch element Q2, the second switch element Q2 and direct current
Source circuit 3 is connected to control the spark rate that DC power supply 32 lights a fire to spark plug 10.The second switch element Q2
Including the second control terminal, the control signal includes spark rate signal, and second control terminal is connect with electronic control circuit 4
To receive igniting frequency signal and control being turned on or off for second switch element Q2.The second switch element Q2 passes through control
Spark rate, so as to be the electric current with specific frequency by DC conversion.
The second switch element Q2 further includes the second input terminal and second output terminal, second input end grounding, and
Two output ends are connected to by firing circuit 1 on DC power supply circuit 3.Therefore, the igniting frequency that second control terminal receives
Rate signal can control being turned on or off for second switch element Q2, the igniting frequency lighted a fire to controllable DC power supply 32
Rate.The electronic control circuit 4 obtains working condition and various parameters of engine etc., and is analyzed, to obtain a little
Fiery frequency, and export igniting frequency signal and give second switch element Q2.
In addition, since spark rate signal has certain frequency and so that second switch element Q2 is constantly opened
It closes, so that DC power supply circuit 3 is also changed with said frequencies, to the sparking frequency of changeable spark plug 10.
In the present embodiment, the second switch element Q2 is connected to DC power supply circuit by the firing circuit 1
On, and independently of the firing circuit 1 be arranged, certainly, if the second switch element Q2 be integrated in firing circuit 1 or
It is connected in DC power supply circuit 3, then also can reach the purpose of the present invention.
Further, it is described start motor circuit include start motor 51 and control start 51 break-make of motor third open
Element Q3 is closed, the third switch element Q3 includes third control terminal, and the control signal includes motor control signal；Described
Three control terminals are connect with electronic control circuit 4 to receive motor control signal and control third switch element Q3 leads on-off
It opens.It starts motor 51 to be usually mounted on engine, and first the flywheel of engine is carried out before engine work
Power-assisted drives, and makes its rotation, to reduce the trouble that manpower starts engine.Therefore, after engine work, you can
Motor 51 will be started to close.
The electronic control circuit 4 is connected with the starting motor 51 with the anti-of the working condition of acquisition starting motor 51
Feedback, so as to judge switching time, sparking opportunity or sparking frequency etc..
Specifically, the third switch element Q3 further includes third input terminal and third output end, the starting motor electricity
Road further includes having second source V2, and the third input terminal is connected with motor 51 is started, and starts motor 51 and is connected to the second electricity
Source V2；The third output end ground connection, and it is connected to electronic control circuit 4 simultaneously.When the third switch element Q3 is connected,
The starting motor 51 starts；When the third switch element Q3 is disconnected, the starting motor 51 is stopped.Described second
Power supply V2 is direct current, and second source V2 and the first power supply V1 are mutual indepedent, certainly or same current source.
In the present embodiment, the third switch element Q3 uses metal-oxide-semiconductor.This is because starting 51 work of motor to allow
Make to need larger electric current, therefore uses metal-oxide-semiconductor.
Therefore, it before engine start, first starts to work so that starting motor 51, booster engine drives engine
Flywheel rotation, meanwhile, lighted a fire to spark plug 10 by DC power supply 32.DC power supply 32 is more steady compared to magnetoelectricity electromechanical source
It is fixed, it thereby may be ensured that the stabilization of ignition energy in bigger range, it is ensured that spark plug 10 can light a fire success.Engine
Normal work, then switches to magneto circuit 2, to may make that engine is normal, steady operation.
In addition, the engine start circuit 100 further includes having one drive circuit 5, the driving circuit 5 is connected to electronics
Between control circuit 4 and starting motor circuit, and signal is controlled to the starting motor circuit output motor；The driving circuit
5 are also connected between electronic control circuit 4 and second switch element Q2, and export spark rate to the second switch element Q2
Signal.
In the first embodiment of the present invention, as shown in Figure 1, the firing circuit 1 includes being connect with magneto circuit 2
The first level-one coil 11, the second level-one coil 12 for being connect with DC power supply circuit 3, and the two level line that is connect with spark plug 10
Circle 13.The number of turns of the secondary coil 13 is far longer than the first level-one coil 11 and the second level-one coil 12, to reach boosting
Effect.In the present embodiment, described first level-one coil, 11 one end is connect with magneto circuit 2, other end ground connection, and described second
12 one end of level-one coil is connect with DC power supply circuit 3, and the other end is by second switch element Q2 and is grounded.In the present embodiment
In, the ground terminal of the first level-one coil 11 and the ground terminal of the second level-one coil 12 can be with mutually insulateds, also can be on-insulated.
In second of embodiment of the present invention, as shown in Fig. 2, the firing circuit 1 includes and the magneto circuit 2
And the level-one coil 11 ' being all connected with of DC power supply circuit 3 and the secondary coil 13 ' being connect with spark plug 10, i.e., the described level-one line
11 ' one end of circle are all connected with magneto circuit 2 and DC power supply circuit 3, other end ground connection.The level-one coil 11 ' has two
A ground terminal, respectively direct-current power supply earthing end and magneto ground terminal, the direct-current power supply earthing end and magneto ground terminal
Mutually insulated.In actual operation, usual magneto ground terminal is connect with outer cage, and direct-current power supply earthing end and casing are mutually exhausted
Edge.
In the first embodiment and second of embodiment, in engine start-up phase, the electronic control circuit 4 controls
The dynamic work of motor 51 is started with booster engine, and be simultaneously emitted by spark rate signal control second switch element Q2 conducting and
It disconnects to control the spark rate of DC power supply 32；
After judging that engine has worked normally, the electronic control circuit 4 sends out switching signal and gives switch element Q1, first switch
K1 is connected to, and second switch k2 is disconnected；
In the engine work stage, the control of the electronic control circuit 4 starts motor 51 and is stopped, and switch k1 connects
It is logical, the work of magneto power circuit.
It should be noted that in engine start-up phase, engine does not work normally also, then electronic control circuit 4 can not
The signal for obtaining engine work, can not also send out switching signal accordingly；In the engine work stage, engine
Normal work, then electronic control circuit 4 gets the signal of engine work, while also sending out switching signal accordingly.
Therefore, it is necessary to judge when engine has been in normal work.It is three kinds of judgment methods below：
（1）The working condition for starting motor 51 can be fed back to electronic control circuit 4, electronic control circuit 4 is started by monitoring
The electric current of motor 51 when the electric current for starting motor 51 is less than threshold current, and after keeping the state several seconds, then judges engine
It has worked normally；In the present embodiment, the threshold current is 5A；
（2）The working condition of engine can be fed back to electronic control circuit 4, electronic control circuit 4 is by monitoring engine
Rotating speed when the rotating speed of engine is more than threshold rotation rate, and after keeping the state several seconds, then judges that engine has worked normally；
In the present embodiment, threshold rotation rate is 1500 r/min；
（3）A preset time can be set in electronic control circuit 4, in engine start-up phase, the connection of DC power supply circuit 3 and
Spark plug 10 is started to light a fire, and starts timing, after reaching preset time, that is, judges that engine has worked normally；In this implementation
In mode, preset time is 2 s to 5 s；In the present embodiment, by the way that preset time is arranged, pass through experience and engine performance
It determines preset time, to directly switch over, realizes relatively simple.
The judgement to the working condition of engine can be achieved in three of the above method, certainly, if there is other judgement sides
Method, as long as can achieve the effect that rationally to judge engine condition, you can reach the purpose of the present invention.
In the third embodiment of the present invention, as shown in figure 3, the magneto circuit 2 is connect by the first diode D1
Enter firing circuit 1, the DC power supply circuit 3 further includes the second diode D2, and the DC power supply 32 passes through the second diode
D2 accesses firing circuit 1；In the present embodiment, the DC power supply circuit 3 further includes ignition control circuit 33 with control point
Fiery frequency, the ignition control circuit 33 are connected between DC power supply 32 and the second diode D2.Certainly, present embodiment
In, it may have booster circuit 31 to DC power supply 32 to carry out first time boosting.
In engine start-up phase, the control of the electronic control circuit 4 is started the work of motor 51 and is started with booster engine,
Since 32 voltage of DC power supply is higher than the voltage that magneto circuit 2 generates, the second diode D2 conductings, the one or two pole
Pipe D1 is disconnected, and 32 circuit of the DC power supply works for plug ignition；
After judging that engine has worked normally, the electronic control circuit 4 sends out switching signal to booster circuit 31, booster circuit
31 failures；
In the engine work stage, the control of the electronic control circuit 4 starts motor 51 and is stopped, due to DC power supply
32 voltages are less than the voltage that magneto circuit 2 generates, therefore the first diode D1 is connected, and the second diode D2 is disconnected, institute
The work of magneto power circuit is stated for plug ignition.
The firing circuit 1 includes the level-one coil being all connected with the magneto circuit 2 and DC power supply circuit 3
11 ' ' secondary coil 13 ' and with spark plug connecting ', the 11 ' ' other end of level-one coil is directly grounded.
In the third embodiment, there are four types of modes for judgement engine normal starting, are specifically described below：
（1）The working condition for starting motor 51 can be fed back to electronic control circuit 4, electronic control circuit 4 is started by monitoring
The electric current of motor 51 when the electric current for starting motor 51 is less than threshold current, and after keeping the state several seconds, then judges engine
It has worked normally；In the present embodiment, the threshold current is 5A；
（2）The working condition of engine can be fed back to electronic control circuit 4, electronic control circuit 4 is by monitoring engine
Rotating speed when the rotating speed of engine is more than threshold rotation rate, and after keeping the state several seconds, then judges that engine has worked normally；
In the present embodiment, threshold rotation rate 1500r/min；
（3）A preset time can be set in electronic control circuit 4, in engine start-up phase, the connection of DC power supply circuit 3 and
Spark plug 10 is started to light a fire, and starts timing, after reaching preset time, that is, judges that engine has worked normally；In this implementation
In mode, preset time is 2s to 5s；In the present embodiment, true by experience and engine performance by the way that preset time is arranged
Determine preset time, to directly switch over, realizes relatively simple；
（4）The supply voltage of DC power supply circuit 3 can be fed back to electronic control circuit 4, when electronic control circuit 4 detects directly
After supply voltage of the galvanic electricity source circuit at least three light-off periods is less than the voltage that magneto circuit 2 generates, that is, refer to direct current
When power circuit does not discharge, engine normal starting is judged.
The judgement to the working condition of engine can be achieved in above four kinds of methods, certainly, if there is other judgement sides
Method, as long as can achieve the effect that rationally to judge engine condition, you can reach the purpose of the present invention.
In conclusion the engine start circuit 100 is commonly used in gasoline engine, and there are two types of working conditions for tool：?
When engine starts to start, driven using DC power supply 32, to can ensure that spark plug 10 can obtain enough ignition voltages,
And it also can normal starting under low temperature, cold state；After engine work, and switch to the driving of magneto voltage, compared with
For environmental protection and energy saving.So as to user-friendly.
It should be appreciated that although this specification is described according to embodiment, not each embodiment only includes one only
Vertical technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should be by specification
As a whole, the technical solutions in the various embodiments may also be suitably combined, formed it will be appreciated by those skilled in the art that
Other embodiment.
The series of detailed descriptions listed above is illustrated only for possible embodiments of the invention,
Not to limit the scope of the invention, it is all without departing from equivalent embodiment made by technical spirit of the present invention or change should all
It is included within protection scope of the present invention.
Claims (15)
1. a kind of engine start circuit, for providing enough voltage in engine start and work for spark plug point
Fire, it is characterised in that：The engine start circuit includes：
Firing circuit, the boost in voltage of firing circuit will be accessed to the ignition voltage of spark plug；
Magneto circuit is connected to firing circuit；
DC power supply circuit, including DC power supply, the DC power supply are connected to firing circuit；
Motor circuit is started, including the starting motor being installed on engine；
In engine start-up phase, the starting motor work is started with booster engine, and the magneto circuit fails,
DC power supply circuit works for plug ignition；
In the engine work stage, the starting motor is stopped, the DC power supply circuit failure, magneto circuit
Work is for plug ignition.
2. engine start circuit according to claim 1, it is characterised in that：The engine start circuit further includes：
Electronic control circuit to obtain the working condition of engine, and sends out control signal, the starting motor circuit and electronics control
Circuit processed is connected and receives control signal to control the start and stop for starting motor.
3. engine start circuit according to claim 2, it is characterised in that：The engine start circuit further includes cutting
Circuit is changed, the magneto circuit accesses firing circuit by first switch, and the DC power supply circuit further includes second switch,
The DC power supply accesses firing circuit by second switch, and the switching circuit receives control signal and opened by control first
It closes and the opening and closing of second switch is to control the break-make of DC power supply circuit and magneto circuit；
In engine start-up phase, the electronic control circuit is controlled the starting motor work and is started with booster engine, and
And the switching circuit controls the second switch closure, first switch disconnects, the DC power supply circuit conducting is for spark
Plug igniting；
In the engine work stage, the electronic control circuit control starts motor and is stopped, and switching electricity
Road controls the first switch closure, second switch disconnects, and the magneto circuit conducting is for plug ignition.
4. engine start circuit according to claim 3, it is characterised in that：The firing circuit includes and the magnetoelectricity
The first level-one coil, the second level-one coil being connect with DC power supply circuit and connect with spark plug two of electromechanical road connection
Grade coil, the first level-one coil and the second level-one coil are grounded respectively.
5. engine start circuit according to claim 3, it is characterised in that：The firing circuit includes and the magnetoelectricity
The level-one coil and the secondary coil being connect with spark plug that electromechanical road and DC power supply circuit are all connected with, the level-one coil point
It is grounded respectively at two-way.
6. engine start circuit according to claim 3, it is characterised in that：The switching circuit include electromagnet and
The first switching element of magnet switching is controlled, the first switching element includes the first control terminal, and the control signal includes
Switching signal；
First control terminal connect with electronic control circuit with receive switching signal and control first switching element conducting or
It disconnects, to realize the break-make of electromagnet.
7. engine start circuit according to claim 6, it is characterised in that：The first switch and second switch are
Single-pole double-throw switch (SPDT), and have one end hanging, the electromagnet is arranged close to the first switch and second switch；
When the electromagnet is powered, the first switch disconnects, second switch conducting；
When the electromagnet power-off, the first switch conducting, second switch disconnects.
8. engine start circuit according to claim 3, it is characterised in that：The firing circuit includes second switch member
Part, the second switch element are connected with DC power supply circuit to control the igniting frequency that DC power supply lights a fire to spark plug
Rate；The second switch element includes the second control terminal, and the control signal includes spark rate signal, second control terminal
It is connect with electronic control circuit to receive igniting frequency signal and control being turned on or off for second switch element.
9. engine start circuit according to claim 8, it is characterised in that：The second switch element passes through the point
Ignition circuit is connected on DC power supply circuit.
10. engine start circuit according to claim 2, it is characterised in that：The magneto circuit passes through the one or two
Pole pipe accesses firing circuit, and the DC power supply circuit further includes the second diode, and the DC power supply passes through the second diode
Access firing circuit；
In engine start-up phase, the electronic control circuit control is started motor work and is started with booster engine, and described the
Two diode current flows, the first diode disconnect, and the DC power supply circuit work is for plug ignition；
In the engine work stage, the electronic control circuit control starts motor and is stopped, first diode
Conducting, the second diode disconnect, and the magneto circuit work is for plug ignition.
11. engine start circuit according to claim 10, it is characterised in that：The firing circuit includes and the magnetic
The level-one coil and the secondary coil being connect with spark plug that motor circuit and DC power supply circuit are all connected with, the level-one coil
Ground connection.
12. engine start circuit according to claim 10, it is characterised in that：The DC power supply circuit further includes having
To control spark rate, the ignition control circuit is connected between DC power supply and the second diode ignition control circuit.
13. engine start circuit according to claim 2, it is characterised in that：The starting motor circuit includes starting
Motor and control start the third switch element of motor break-make, and the third switch element includes third control terminal, the control
Signal includes motor control signal；The third control terminal is connect with electronic control circuit to receive motor control signal and control
Third switch element is turned on or off.
14. engine start circuit according to claim 1, it is characterised in that：The electronic control circuit with described
Dynamic motor is connected to obtain the working condition for starting motor.
15. engine start circuit according to claim 1, it is characterised in that：The DC power supply circuit further includes rising
Volt circuit, the booster circuit are connected between DC power supply and firing circuit to boost to DC power supply.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744756.5A CN108757265B (en) | 2018-07-09 | 2018-07-09 | Engine starting circuit |
| PCT/CN2018/111634 WO2020010747A1 (en) | 2018-07-09 | 2018-10-24 | Engine starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744756.5A CN108757265B (en) | 2018-07-09 | 2018-07-09 | Engine starting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108757265A true CN108757265A (en) | 2018-11-06 |
| CN108757265B CN108757265B (en) | 2024-01-05 |
Family
ID=63972848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810744756.5A Active CN108757265B (en) | 2018-07-09 | 2018-07-09 | Engine starting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108757265B (en) |
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| GB757163A (en) * | 1953-09-29 | 1956-09-12 | Bendix Aviat Corp | Improvements in or relating to ignition systems |
| CN2219384Y (en) * | 1995-03-22 | 1996-02-07 | 贺雷 | High-energy ignitor for automobile |
| JP2002161839A (en) * | 2000-11-29 | 2002-06-07 | Kokusan Denki Co Ltd | Ignition device for capacitor discharge type internal combustion engine |
| CN2753891Y (en) * | 2004-07-15 | 2006-01-25 | 中国嘉陵工业股份有限公司（集团） | High-energy ignition system for motorcycle |
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| CN201328097Y (en) * | 2008-11-13 | 2009-10-14 | 重庆宗申发动机制造有限公司 | Controller for brushless starting magneto of motorcycle |
| CN105508117A (en) * | 2016-01-15 | 2016-04-20 | 苏州科瓴精密机械科技有限公司 | Portable gasoline tool and electronic ignition system thereof |
| CN208534673U (en) * | 2018-07-09 | 2019-02-22 | 苏州科瓴精密机械科技有限公司 | A kind of engine start circuit |
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2018
- 2018-07-09 CN CN201810744756.5A patent/CN108757265B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190412741A (en) * | 1904-06-06 | 1905-04-06 | Harvey Du Cros | Improvements in Electric Ignition Apparatus for Internal Combustion Motors. |
| GB190804137A (en) * | 1907-10-28 | 1909-04-26 | Bosch Robert | An Improved Method of and Apparatus for Starting Internal Combustion Engines by Electrical Ignition. |
| GB757163A (en) * | 1953-09-29 | 1956-09-12 | Bendix Aviat Corp | Improvements in or relating to ignition systems |
| CN2219384Y (en) * | 1995-03-22 | 1996-02-07 | 贺雷 | High-energy ignitor for automobile |
| JP2002161839A (en) * | 2000-11-29 | 2002-06-07 | Kokusan Denki Co Ltd | Ignition device for capacitor discharge type internal combustion engine |
| CN2753891Y (en) * | 2004-07-15 | 2006-01-25 | 中国嘉陵工业股份有限公司（集团） | High-energy ignition system for motorcycle |
| CN201144754Y (en) * | 2008-01-18 | 2008-11-05 | 北京工业大学 | Intelligent fly wheel controller of engine for automobile |
| CN201328097Y (en) * | 2008-11-13 | 2009-10-14 | 重庆宗申发动机制造有限公司 | Controller for brushless starting magneto of motorcycle |
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| CN208534673U (en) * | 2018-07-09 | 2019-02-22 | 苏州科瓴精密机械科技有限公司 | A kind of engine start circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108757265B (en) | 2024-01-05 |
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