CN106593742A - Multiplexing drive circuit for AC ignition system with current mode control and fault tolerance detection - Google Patents
Multiplexing drive circuit for AC ignition system with current mode control and fault tolerance detection Download PDFInfo
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- CN106593742A CN106593742A CN201611216214.8A CN201611216214A CN106593742A CN 106593742 A CN106593742 A CN 106593742A CN 201611216214 A CN201611216214 A CN 201611216214A CN 106593742 A CN106593742 A CN 106593742A
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- Prior art keywords
- ignition
- current
- switch
- igniters
- electric current
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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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
- F02P3/0414—Opening or closing the primary coil circuit with electronic switching means using digital techniques
-
- 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
- F02P23/00—Other ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
- F02P3/0435—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices
- F02P3/0442—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices using digital techniques
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/045—Layout of circuits for control of the dwell or anti dwell time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
- F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
- F02P3/053—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
-
- 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
- F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
- F02D2041/2006—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost capacitor
Abstract
A multiplexing drive circuit for an AC ignition system has a common branch that includes two switches coupled in series, and one or more dedicated branches. Each branch includes two switches coupled in series. The multiplexing drive circuit also includes a transformer for each of the one or more dedicated branches. Each transformer has a primary winding coupled between one of the one or more dedicated branches and the common branch. Each transformer has a secondary winding coupled in parallel to a spark plug. A pulse-width modulated (PWM) switch controller is configured to operate the common branch and dedicated branch switches to control characteristics of the spark discharge for the spark plug. The switch controller is capable of real-time diagnostic checks by monitoring the time at which a spark discharge event takes place.
Description
The application is the Application No. 201210334125.9, applying date on June 29th, 2012, entitled " is used for
The application for a patent for invention of the multiplex drive circuit of the AC ignition systems detected with Controlled in Current Mode and Based and fault tolerance "
Divisional application.
The cross reference of related application
Present patent application is co-pending U.S. Patent application No.12/542, and 794 part continuation application, the U.S. is special
The applying date of profit application is August in 2009 18, and all teachings of these applications and disclosure are incorporated herein by.
Technical field
The present invention generally relates to the ignition system of the internal combustion engine using spark plug, more particularly, it relates to be used for
Using the ignition system of the internal combustion engine of spark plug, and for controlling the control system of spark plug operation and inspection system failure.
Background technology
Generally, internal combustion engine includes spark plug and the pyrophoric firing circuit of product, so as to light sky in cylinder
Gas-fuel mixture.Some electromotors produce voltage using the permanent magnet for being attached to rotary flyweights on charge coil.In typical case
Capacitive discharge systems in, the electric energy from low-voltage battery is supplied to electric power supply apparatus, and the electric power supply apparatus are this
Electric energy boosting is the high voltage on capacitor, and the capacitor on the spark gap of spark plug for needed for producing electric spark and provide
Voltage.Its energy is sent to the capacitor armature winding of ignition coil and the magnetic core of ignition coil.From ignition lead
Circle secondary windings extract energy, till capacitor and magnetic core do not have enough energy.In inductive system, at the beginning of coil
The low tension battery of level side draws energy.When the current interruptions in coil primary winding, the flyback (flyback) of generation causes secondary
Puncturing for level coil, energy is extracted by secondary windings from ignition coil magnetic core.Either in capacitive discharge or inductance
In property discharge ignition system, energy is all in moment T1The magnetic of ignition coil is sent to by the electric current of ignition coil armature winding
Core.In subsequent moment T2, from the energy production ignition coil secondary voltage and current being stored in magnetic core.Change open-circuit voltage
(OCV), the ability of current amplitude (CA) and spark duration (SD) these secondary coil characteristics all with wound core in store
Energy change it is relevant.But, once energy, Already in magnetic core, the characteristic of secondary coil is largely just
It is defined as any state of secondary load permission, will not changes before igniting in next time.
For the design of given inductive or capacitive discharge coil, OCV, CA and SD all with storage energy directly into
Direct ratio.With the energy increase being stored in magnetic core, these three values also increase.Maximum constraint in these systems is open circuit electricity
Pressure.The parameter should be always sufficiently large reliably causing spark.Accordingly, it would be desirable to the energy applied to coil has minimum energy
Amount, so as to reliably produce spark.For typical inductive and capacitive discharge ignition system, the order of magnitude of OCV is 25-
40kV.The scalable amount of CA and SD is which has limited, the regulation of the scalable amount can be by applying to adjust energy realization.In addition, CA
Must simultaneously increase with SD or while reduce.In traditional inductive or capacitive discharge coil design, these parameters can not
It is independently adjusted.In order to improve the Whole Response of ignition system, it usually needs improve coil design.But, typically for given
Coil design for, to different engine operating conditions, the relation between OCV, CA and SD cannot be optimised.
Used as inductive discharge and the succedaneum of capacitive discharge ignition system, some engine systems are using exchange (AC)
Ignition system.In AC ignition systems, generally alternating current is produced by DC-AC inverter.May adopt in this system
Inverter has several type.For example, exemplary AC ignition systems include transformator, and the transformator has centre tapped first
Level coil and it is connected to the secondary coil of spark plug.By capacitor to the multiple windings with centre tapped primary coil
One of electric discharge, can starting arc on spark plug.Two terminals of primary coil are all connected with switch or transistor.Switch can be
Sense of current in switching between being switched on and off so as to change primary coil, and thus change the side of electric current in secondary coil
To.Can be according to the control for being conducive to the mode for adjusting CA the or SD time periods to realize these switches.
But, AC ignition systems generally using specific capacitance and the more power semiconductors of inductive system, for example, are switched
And diode.Or, alternatively, AC igniting needs ignition coil to have more than two winding, e.g. centre cap line
The primary setting of circle.Generally, with the reduction of coil complexity, the power semiconductor for being used increases, and vice versa.Due to volume
The element for increasing outward and the complexity for increasing provide more points that may be broken down, and this causes AC ignition systems cost to become
Height, and potential reliability reduction.In addition, many AC ignition systems do not allow to carry out secondary current accurately in real time
Control, wherein secondary current determines the characteristic of spark discharge.In addition, many AC ignition systems do not have fault certainly
The function of diagnosis or the function of prediction further circuits failure.
It would therefore be desirable to have a kind of exchange ignition system, it can adopt the element more less than conventional AC ignition system with more
Low cost manufacture, and it can make simple double winding ignition coil realize igniting.A kind of ignition system is also needed to, it is permitted
Perhaps the accurate real-time control of SD and CA higher degrees is realized than traditional inductive, capacitive discharge or exchange ignition system.In addition,
The ignition system of a kind of energy discovery circuit failure or estimation future malfunction probability is very useful.
The embodiment provides a kind of exchange ignition system.These and other of the invention and advantage, and it is attached
Plus creative feature, will be become readily apparent from by detailed description below of the present invention.
The content of the invention
In an aspect, An embodiment provides a kind of multiplexing for AC ignition systems drives
Circuit, it has a shared branch road, and the shared branch road includes the switch of two coupled in series, and one or more special
Road, wherein each private driveway include the switch of two coupled in series.The AC ignition systems also include special for one or more
With the transformator of each in branch road (having the ignition coil of two windings), each transformator has and is coupled in one or many
Armature winding between one in individual private driveway and shared branch road.In addition, each transformator is with parallel with spark plug
The secondary windings of coupling.The AC ignition systems also include pulsewidth modulation (PWM) switch controller, and it is configured to shared of operation
Road and private driveway switch to control the characteristic of the spark discharge for spark plug.
According on the other hand, An embodiment provides a kind of programmable A C ignition system, it includes DC
Electrical bus, multiple spark plugs, each spark plug is coupled with the secondary windings of corresponding transformator.Each transformator includes tool
There is the armature winding of the first terminal, the first terminal is coupled between corresponding a pair of special switchs of coupled in series.This can be compiled
Journey AC ignition system also a pair of common switch with coupled in series, the Second terminal of wherein each armature winding is connected to shared
Between switch, wherein common switch and each special switch are both coupled to DC buses.The AC ignition systems have PLC technology
Device, it is configured to using pulse-width modulation operation common switch and special switch, wherein control common switch and special switch bag
Control is included for the spark discharge characteristic of multiple spark plugs.In addition, Programmable Logic Controller being capable of detecting system failure.In addition, can
Programmable controller can be based on once provide energy and time span that spark event spent occur predicting to ignition system
Spark plug failure or situation about can not start.
When being considered in conjunction with the accompanying, other aspects of the present invention, target and advantage will become in the following detailed description
Become apparent from.
Description of the drawings
Including in this manual as the part of this specification accompanying drawing show the present invention several aspects, and and
Description is used to illustrate the principle of the present invention together.In figure：
Fig. 1 is the signal of the AC ignition system modules with multiplex drive circuit according to one embodiment of the invention
Figure；With
Fig. 2A and 2B are timing diagrams, show fundamental voltage and electricity during the exemplary operation of Fig. 1 ignition systems
Stream waveform；
Fig. 3 is the frame of 16 channel AC ignition systems with multiplex drive circuit according to one embodiment of the invention
Figure.
Fig. 4 is the circuit diagram for programmable control system.
Fig. 5 includes multiple timing diagrams, show fundamental voltage during the exemplary operation of the ignition system of Fig. 4 and
Current waveform.
Fig. 6 shows the exemplary operation of the particular aspects of circuit in Fig. 4.
Fig. 7 includes multiple timing diagrams, exemplary operation when showing that circuit runs in the manner depicted in FIG. 6 in Fig. 4
The fundamental voltage and current waveform of period.
Fig. 8 shows the operation of a particular aspects when fault occurs in the circuit of Fig. 4.
Fig. 9 includes multiple timing diagrams, during operation when showing that circuit runs in the way of shown in Fig. 8 in Fig. 4
Fundamental voltage and current waveform.
Figure 10 shown for different breakdown voltages, flows through the electric current chart of the primary coil of AC ignition systems.
Although will be with reference to the certain preferred embodiment description present invention, it is not intended that limiting the invention to these
Embodiment.On the contrary, in the spirit and scope of the present invention defined in the appended claims, the intention will be comprising all optional sides
Case, modification and equivalents.
Specific embodiment
Fig. 1 shows exemplary exchange (AC) ignition system module 100 according to an embodiment of the invention, and it has many
Road is multiplexed drive circuit 101.Ignition system module 100 may be structured to (that is, being connected with three spark plugs) of 3 passages, or
It is two channel modules (that is, being connected with two spark plugs), and including shared or shared branch road 102, branch road 102 has two
The switch S2,104 and S3,106 being connected in series.First private driveway 108 has two switch S4,110 and S5 being connected in series,
112.One terminal 103 of the armature winding 114 of the first ignition coil or transformator 116 is connected to switch S2,104 and S3,106
Between, and another terminal 105 of armature winding 114 is connected to and switchs S4, and 110 and S5, between 112.First transformator 116
Secondary windings 118 are connected in parallel with the first spark plug 120.Because the ignition coil of the present invention need not be stored as prior art point
The so much energy of the ignition coil of fiery system, therefore the ignition system of the present invention may be structured to using such ignition lead
Circle, the ignition coil is substantially designed to as high-tension transformer operation rather than energy accumulating device.
Second private driveway 122 includes two switch S6,124 and S7,126 being connected in series.Second private driveway 122 with
First private driveway 108 and shared branch road 102 are connected in parallel.The of the armature winding 128 of the second ignition coil or transformator 130
One terminal 121 is connected to and switchs S2, and 104 and S3, between 106, and the Second terminal 123 of armature winding 128 is connected to switch S6,
Between 124 and S7,126.The secondary windings 132 of the second transformator 130 are connected in parallel with the second spark plug 134.
In another the triple channel embodiment of the present invention, the 3rd private driveway 136 is (shown in broken lines) including series connection
Two switch S8,138 and S9,140 of connection.One terminal of the armature winding 142 of the 3rd transformator 144 (shown in broken lines)
131 be connected to switch S2,104 and S3, between 106, and another terminal 133 of armature winding 142 be connected to switch S8,138
And S9,140 between.The secondary windings 146 of the 3rd transformator 144 are connected in parallel with the 3rd spark plug 148.
Hereafter will be apparent from, share branch road 102 and be referred to as shared or public branch road, because it can be with igniting
The more than one primary winding connection for spark plug of system.Shared branch road 102 and three private driveways 108,
122,136 are all connected in parallel.But, each private driveway 108,122,136 all connects from different primary windings.Often
Individual armature winding all connects from different spark plugs.
In one embodiment, switch is N-channel field-effect transistor (FET).In another embodiment, switch is gold
Category oxide semiconductor field effect transistor (MOSFET), In yet another embodiment, switch is insulated gate bipolar transistor
(IGBT).However, it is contemplated that other kinds of switch the switch for also being used as the embodiment of the present invention.In another of the invention
In embodiment, each in one or more switches has the diode being connected in antiparallel.
Pulsewidth modulation (PWM) switch controller 150 is connected with current sense resistor 152 and the neutral conductor 154, the neutral conductor 154
It is connected with the public terminal of shared branch road 102 and private driveway 108,122,136.In one embodiment of the invention, PWM is opened
Gateway controller 150 is used as field programmable gate array (FPGA).When switch is MOSFET or igbt transistor, PWM on-off control
Device 150 is connected with controlling switch operation with the grid of transistor.In addition, PWM switch controller 150 may be structured to for high frequency
Operation, such as 5-55 KHz.The high-frequency operation of switch controller 150 allows the precise control to primary current level.
High coupling factor between armature winding and secondary windings means that the precise control of primary winding current causes secondary windings electricity
Accurate, the real-time control of stream.This control of secondary winding current causes the control for realizing spark discharge characteristic (such as CA and SD)
System.Therefore, PWM switch controller 150 is configured to change these ginsengs of electric discharge during the electric discharge of specific spark occurs
Number.
In one embodiment of the invention, it is electric for producing the DC of pyrophoric electric energy boost converter 162 from DC to DC
Power bus 160 draws acquisition.Boost converter 162 includes the controller 164 of Operation switch S1 166.By controller 164 pairs
The control of switch S1 166, controller 164 adjusts output voltage, i.e. the voltage of the DC electric power bus 160 of boost converter 162.
Battery 168 to inducer 170 provides electric current.The inductor terminals 171 relative with battery 168 and diode 172 and switch S1
166 connections.Switch S1 166 is connected with current sensing resistor 173 and controller 164 again.The diode relative with inducer 170
Terminal 175 is connected with capacitor 174, DC electric power bus 160, and is connected with the Voltage Feedback line 177 for being connected to controller 164.
In one exemplary embodiment of the present invention, battery 168 provides 24 volts of unidirectional currents, and it is in DC electric power bus 160
Place boosts to about 185 volts.In order to produce predetermined average current IL, it is modulated to switching S1 166 using pulsewidth modulation.
Electric current ILExchange (AC) ripple component (for example, about ± 6 amperes) will be less than DC component (for example, about 34 amperes).When
During 162 " on " of boost converter, electric current ILIt is continuous, constant electric current.When 162 " on " of boost converter, in S1
During modulation when the disconnections of S1 166 are switched, electric current ILThe electric current bag that capacitor 174 is flowed through diode 172 will be provided.This
A little electric current bags will flow into capacitor 174, and improve the voltage on capacitor 174.Voltage Feedback line 177 is used for by controller 164
Boost converter 162 is cut off at predetermined voltage level (that is, 185 volts) place.In the point, S1 modulation will stop, and switch S1 166 will
Rest on open mode.Then electric current ILZero will be begun to decrease to.As voltage VboostWhen being reduced to the second predeterminated level, boosting turns
Parallel operation 162 will be again switched on, and high frequency S1 modulation will be activated again, so as to produce the suitable direct current for flowing through inducer 170
(DC) electric current IL, so as to firmly keep 185 volts on the dc bus.
In order to control the spark character of spark plug 120, switch S2 104 and S5 112 works in pairs together.They connect simultaneously
Logical or while cut-out.Switch S3 106 and S4 110 also work in pairs together, and with switch S2 104 and S5 112 operation
State is contrary.The spark plug gap of the first spark plug 120 it is initial ionizing by switch S3 106 and S4 110 connection and
Realize.In one exemplary embodiment, transformator 116,130,144 armature winding and secondary winding turns ratio are of about 1:
180.When switch S3 106 is connected with S4 110,185 in DC electric power bus 160 volt voltage is applied on armature winding 114.
This produces high voltage on secondary windings 118.As the voltage (V on spark plug gapSP) sufficiently high (such as from 5 to 40 kilovolts)
When, ionizing will occur on spark plug gap.Now, spark plug gap seems it is no longer open circuit, and more like a Zener
Diode.As long as the secondary windings 118 of transformator 116 can exceed the Zener voltage of spark plug gap, or keep voltage, then
Spark gap will keep ionizing, spark discharge persistently to carry out.Holding voltage during spark discharge on spark plug gap
To decline, VSPThe voltage being reduced between 300 volts to 3000 volts.VSPPolarity determined by the sense of current.
Identical with above-mentioned mode, switch S2 104 and S7 126 works in pairs together, and they are also turned on or while cut
It is disconnected.Switch S3 106 and S6 124 also works in pairs together, and contrary with the mode of operation of switch S2 104 and S7126.Open
Close S2 104, S7 126, S3 106 and S6 124 to operate to control the spark discharge characteristic of the second spark plug 134 together.It is similar
Ground, switch S2 104 and S9 140 (shown in broken lines) works in pairs together, and they are also turned on or while cut-out.Switch S3
106 and S8 138 (shown in broken lines) also works in pairs together, and contrary with the mode of operation of switch S2 104 and S9 140.
Switch S2 104, S9 140, S3 106 and S8 138 operate to control the spark discharge characteristic of the 3rd spark plug 148 together.
During AC ignition systems work, the electric current I when switching S2 104 and connecting with S5 112 (close)PFlow through primary
Coil 114.Work as IPWhen reaching predeterminated level (such as 30 to 150 amperes), the cut-out S2 104 and S5 112 of switch controller 150,
It is also turned on switching S3 106 and S4 110.When switch S3 106 is connected with S4 110, the electric current I of armature winding 114 is flow throughP
Change direction, so as to the AC for defining ignition system is operated.Switch S3 106 and S4 110 will be retained as on-state, until
Electric current IPTill reaching predetermined value, the size of the predetermined value is equal to the amplitude of the switch peak current of S2 104 and S5 112, but
It is opposite polarity.Therefore, electric current IPWith high frequency triangle wave shape.Flow into the electric current I of secondary windingsSWith with primary winding current
IPIdentical shape and phase place, but proportional zoom can be formed according to the turn ratio of armature winding and secondary windings.
Transformator 116,130,144 relative to the winding of common ignition coil have the primary and secondary of low inductance around
Group.As shown in figure 1, the low inductance of the primary and secondary winding of three transformators allows primary winding current and secondary winding current
Close-coupled.Low inductance also allows the precise control to armature winding and secondary winding current.By accurately controlling primary
Winding current, secondary winding current is also precisely controlled.
In an exemplary embodiment of the present invention, the primary inductance of transformator is about 109 microhenrys, and secondary inductance is about
3.7 is prosperous, and primary leakage inductance is about 28 microhenrys, and secondary leakage inductance is about 0.95 prosperous.In addition, the primary coupling factor of transformator
It is about 0.8630, secondary coupling ratio is about 0.8630, turn ratio is about 184 to 1.Flow through the primary and secondary of transformator
The time rate of change of the electric current of winding is indicated by leakage inductance or coupling factor.Coupling factor can be determined by equation below：
1-k2=Lps/Lp=Lsp/Ls, (1)
Wherein k is coupling factor, LpPrimary inductance when being secondary open circuit, LsSecondary inductance when being primary open, Lps
Primary inductance (leakage at primary) when being secondary short circuited, LspSecondary inductance (letting out at secondary when being primary short
Leakage).This sets the frequency of oscillation that given electric current is arranged.With the increase of current value, frequency reduces.When being couple to 185 volts of volumes
When determining bus, as output current level is reduced to 65mA (rms) from 300mA (rms), the frequency of oscillation of transformator is from about existing
12kHz is to about in 55kHz.With regard to inductance mentioned herein and coupling factor, " about " means plus-minus 25%, because very
It is multifactor to affect these values, including interwinding capacity, Kelvin effect, approach effect, measuring method and product differentiation.
In another exemplary embodiment of the present invention, the primary inductance of transformator is of about 246 microhenrys, secondary inductance
It is of about 8.11 prosperous, primary leakage inductance is about 61 microhenrys, secondary leakage inductance is about 2.04 prosperous.In addition, the primary of transformator
Coupling factor is about 0.8672, and secondary coupling ratio is about 0.8651, and turn ratio is about 182 to 1.When being couple to 185 volts
During nominal bus, as output current level is reduced to 65mA (rms) from 300mA (rms), the frequency of oscillation of transformator is from about
In 5kHz to about in 29kHz.
Fig. 2A and 2B are timing diagrams, show the fundamental voltage during the expected operation of Fig. 1 ignition system modules 100
And current waveform.ILWaveform 202 shows the input current for flowing to boost converter.Little ripple is not in this simulation data
Substantially.Notice ILStop when the time being equal to zero.As voltage VboostWhen decreasing below 180 volts, ILBegin to turn on, or even
I after spark stops at 1 millisecondLAlso constant conduction.Electric current ILFlowing is until VboostReturn to 185 volts.
VboostWaveform 204 shows 185 volts of DC output voltages of boost converter.Have during the heavy load of ignition event
Some voltages decline.But, the basic conception of this programme is voltage VboostFor steady state value.The voltage illustrated in analogous diagram declines
The result of nonideal or actual supply of electric power design alternative.
Cur_Cmd waveforms 206 show primary current IPThe AC amplitudes of instruction.It should be noted that electric current IPPeak value correspond to
Cur_Cmd tracks.It should also be noted that as shown in Figure 2 A and 2B, with corresponding, almost summary responses IP, Cur_Cmd is almost
Can be changed immediately.
S2, S5 instructional waveform 208 shows the state of switch S2 104 and S5 112.When signal is+1 (height), switch
104,112 closures.When signal is -1 (low), switch 104,112 disconnects.S3, S4 instructional waveform 210 shows switch S3 106
With the state of 110S4.When signal is+1 (height), switch 106,110 is turned on.When signal is -1 (low), switch 106,110 breaks
Open.It should be noted that the phase place of S2, S5 instructional waveform 208 and S3, S4 instructional waveform 210 is different.
IPWaveform 212 shows ignition coil primary current.It should be noted that the electric current has triangle AC shapes.The AC
The amplitude of electric current is determined by Cur _ Cmd signal.The frequency of the AC electric currents is Vboost, the result of LP and Cur_Cmd.With Cur_
The increase of Cmd amplitudes, frequency reduces.It it is of about 100 amperes period Cur_Cmd is punctured.After puncturing, Cur_Cmd is changed to
About 50 amperes.In 600 μ sec and 800 μ sec, Cur_Cmd changes, IPCorrespondingly change.
VSPWaveform 214 shows the voltage at sparking-plug electrode.It should be noted that puncturing generation about 35 in the emulation
Kilovolt.Afterwards, VSPIt is reduced to the holding voltage that the amplitude under the simulation scenarios is about 1000 volts.It should also be noted that VSPPole
Property is by electric current ISDirection determine.
Electric current ISWaveform 216 is IP(that is, triangular wave) according to the proportional scaling of turn ratio in ignition coil reflection.Electricity
Stream ISAnd the characteristics of to change the ability of its amplitude immediately be embodiment illustrated in fig. 1.It should be noted that the first negative peak is at a relatively high simultaneously
And follow Cur_Cmd waveforms 206.After puncturing, Cur_Cmd reduces, ISAmplitude also correspondingly reduce.In about 600 μ sec,
Cur_Cmd is gradually uprised, electric current ISAmplitude be also such.In about 800 μ sec, Cur_Cmd changes again, electric current IS
It is such.In about 1000 μ sec, Cur_Cmd vanishing, electric current ISStopping is followed.This causes the termination of spark.
The programmability of spark flash-over characteristic allows to select CA and SD in a wide range in the present invention.For example, it is of the invention
It is that in the range of 0.1 to 4.0 milliseconds, CA is programmed in 50 to 1000 millis that one embodiment allows spark discharge time programming
In the range of peace.Therefore this allows single igniting system design to be applied to various different electromotors designs and configuration.With pin
It is different to a series of whole ignition systems of the design of different electromotors and manufacture, an ignition system of embodiments of the invention design
Design can be programmed to work together with the electromotor of different model.This programmability can be by programmable device or controller
Software section ground is integrally realized.
The programmability of ignition system described herein is conducive to the more long life of the spark plug used in system.
During the life-span of electromotor, it is aspect expensive and time-consuming during electromotor is integrally maintained to change spark plug.In common spark
In plug, spark gap increases with export license.Of long duration, this causes punch through voltage and keeps voltage increase.Other because
Element, for example, can puncture mean effective pressure and can also affect operating mode in cylinder with what engine load increased, including electromotor work
The spark discharge characteristic of period.Can change on one's own initiative for a user affects the specific electromotor ginseng of spark discharge characteristic
Number.The change of the change of parameter, such as these parameters, can be switched on and off controller 150 and detect, and it is then during spark discharge
Increase energy to spark, if desired, spark character is maintained at acceptable operation and limits interior.This is by primary and secondary
The close-coupled of level electric current is realizing.In an embodiment of the present invention, the real-time control secondary current by control primary current.
In another embodiment, PLC technology is that FPGA is configured to control the electric current and detection electricity in primary coil
Road failure.Fig. 4 shows the single rank of FPGA control circuit 400 and the multiplex drive circuit for AC ignition systems
Section.Even if merely illustrating the single stage, the control circuit of design can also control other stages.The output signal of FPGA407
IREF_HI_1 and IREF_HI_2 are connected respectively to low pass filter 401 and 402.Low pass filter 401 and low pass filter 402
Output be couple to together with IREF_HI_SELECT switch 403 input.The output of switch 403, is also designated as
CurrCmdPeak, is coupled to the positive input terminal of comparator 404.The negative terminal of input comparator 404 is V_IFB.Comparator
404 output is _ IFB_PK, and it is connected as input to FPGA407.
IREF_HI_1 and IREF_HI_2 are pulsewidth modulation (PWM) control signals, and it is that the electric current of primary ignition coil sets
Determine threshold value.FPGA control circuit 400 before ignition event by setting IREF_HI_SELECT, IREF_HI_1 and IREF_HI_2
Suitable dutycycle to control primary ignition coil in electric current.Low pass filter 401 and 402 is pwm signal IREF_HI_1
D/C voltage command value is converted to IREF_HI_2, and IREF_HI_SELECT controlling switches 403.IREF_HI_SELECT is allowed
FPGA control circuit 400 switches immediately between two D/C voltage command values IREF_HI_1 and IREF_HI_2.Then utilize than
Selected D/C voltage command value is set to be compared with V_IFB compared with device 404.V_IFB represents the voltage measured on resistance 416, its
It is directly proportional to the electric current for flowing through primary ignition coil 415.Therefore, whenever V_IFB reaches the D/C voltage command value of regulation (after filtering
IREF_HI_1 or IREF_HI_2) when, the output _ IFB_PK of comparator 404 will instruct FPGA407 switching multiplexings to drive
Switching network in circuit, this has been discussed above.
In addition, IREF_HI_SELECT can immediately be selected between IREF_HI_1 and IREF_HI_2.Follow in initial ignition
During ring, FPGA407 can change the pwm signal of IREF_HI_1 and IREF_HI_2 and be suitable for what is changed in whole ignition system
Operating mode.For example, IREF_HI_SELECT can start ignition cycle using IREF_HI_1, and be switched to during ignition cycle
IREF_HI_2.When IREF_HI_2 is currently operating in, FPGA407 can change the dutycycle of the pwm signal of IREF_HI_1 with
Produce the control point of another switching network being used in multiplex drive circuit.
Fundamental voltage during the expected operation that multiple timing diagrams that Fig. 5 is included show the FPGA control circuit 400 of Fig. 4
With the example of current waveform.IPWaveform 502 illustrates the electric current in primary coil 415.It should be noted that how smart the peak value of waveform is
The true peak value in response to V_IFB waveforms 508.
V_IFB waveforms 508 show electric current IP502 and resistance 416 on voltage between relation.It is superimposed upon V_IFB ripples
The top of shape 508 is by the CurrCmdPeak of the IREF_HI_SELECT settings from FPGA407.
S2, S5 instructional waveform 504 is shown by FPGA407 generations for S2 411 and the drive signal of S5 412.S3,
S4 instructional waveforms 506 are shown by FPGA407 generations for S3 413 and the drive signal of S4 414.It should be noted that two
How waveform has accurate contrary phase place, when V_IFB reaches one in each CurrCmdPeak levels, occur from height to
Low or transformation from low to high.
_ IFB_PK waveforms show the output of comparator 404 in Fig. 4.When V_IFB waveforms are more than CurrCmdPeak, _
IFB_PK waveforms are reduced, and FPGA407 is meaned to have reached desired peak current threshold.Now, FPGA407 switchings S2,
S5 instructional waveforms 504 and S3, S4 instructional waveform 506, so as to change the working condition of switching network.
IREF_HI_SELECT waveforms 512 show FPGA407 command signals, and the signalisation switch 403 is in IREF_
Switch between HI_1 and IREF_HI_2, this sets the new level of CurrCmdPeak.It should be noted that in V_IFB waveforms 508
The CurrCmdPeak lines of middle superposition show this relation.
In addition, FPGA control circuit 400 has diagnosis capability.FPGA control circuit 400 can detect various faults,
Including：Short-circuit conditions on primary coil 415；Open circuit situation on primary coil 415；Primary ignition coil 415 it is positive or negative
The short-circuit conditions of (PRI+ and PRI-) between side and ground.
In the diagram, FPGA control circuit 400 includes comparator 405,406 and 408.CurrentCmdMid is FPGA
PWM output signal, it flows through low pass filter 422, produces a DC reference voltage, and the DC reference voltages are couple to comparator
405 positive input terminal is used to be compared with V_IFB, and V_IFB is couple to the negative input end of comparator 405.CurrentCmdLo
It is another PWM output signal of FPGA, it flows through low pass filter 424, produces a DC reference voltage, the DC reference voltages
Being couple to the positive input terminal of comparator 406 is used to be compared with V_IFB, and V_IFB is couple to the negative input end of comparator 406.
CurrSDLevel is another PWM output signal of FPGA, and it flows through low pass filter 420, produces a DC reference voltage,
The DC reference voltages are couple to the positive input terminal of comparator 408 to be used to be compared with V_HS, and V_HS is couple to comparator 406
Negative input end.The output of comparator 405,406 and 408 is respectively _ IFB_MID, _ IFB_LO and _ ISD.
Substantially, CurrSDLevel, CurrCmdMid, CurrCmdLo produce the voltage ginseng being compared with systematic parameter
Examine parameter.Specifically, the systematic parameter for being compared is that (it corresponds to primary coil 415 for voltage (V_IFB) on resistance 416
In electric current), and the voltage (V_HS) on resistance 410 (it corresponds to the electricity of the primary coil for flowing through current transformer 409
Stream).In the diagram, they are shown as being obtained from FPGA407, but voltage reference points can also be from single DC reference circuits
Obtain.Respectively as comparator 408, comparator 405 and comparator 406 output _ ISD, _ IFB_MID and _ IFB_LO be logical
Know that the electric current in FPGA407 primary coils 415 has reached the signal of some prescribed levels.
Specifically, _ IFB_LO is the trigger for being input into FPGA407, and the electric current in its instruction primary coil 415 is
Predetermined low-level is reached.Fig. 5 _ IFB_LO waveforms 516 show this function.It should be noted that working as V_IFB waveforms 508
Across produce voltage reference lines superposition CurrCmdLo when, _ IFB_LO be how to be changed into from height it is low.Similarly, _
IFB_MID is the trigger for being input into FPGA407, and it is predetermined medium that it indicates that the electric current in primary coil 415 has reached
Level.Fig. 5 _ IFB_MID waveforms 514 show this function.It should be noted that when V_IFB waveforms 508 are across the voltage for producing
During the CurrCmdMid of the superposition of reference line, _ IFB_MID be how to be changed into from height it is low.
_ ISD is worked as from power supply VboostThe trigger of FPGA407 is notified when obtaining excessive electric current.In order to produce the letter
Number, the DC reference signals produced from CurrSDLevel are compared with V_HS in comparator 408.V_HS is on resistance 410
Voltage, as shown in figure 4, the voltage reflects the electric current of the primary coil for flowing through current transformer 409.
During the normal work of AC ignition systems 400, from power supply the other parts of electric current feed system are drawn.Flow through electric current
The electric current of the primary side of transformator 409 induces electric current in the primary side of current transformer 409, and then electricity is produced on resistance 410
Pressure.So as to produce the V_HS used by comparator 408.
Above-mentioned failure can be detected by monitoring _ IFB_MID, _ IFB_LO and _ ISD, FPGA407.Specifically
Say, the short-circuit conditions on primary coil 114 can be all early than expected triggering ground by _ IFB_LO and _ IFB_MID and detect.
Open circuit situation on primary coil 114 can be never triggered by _ IFB_LO and _ IFB_MID and be detected.Primary ignition line
Short-circuit conditions between the negative side and ground of circle (PRI- is shown as in Fig. 4) can be uprised by _ ISD and detected.This is because
Short-circuit conditions between PRI- and ground will cause to obtain excessive electric current so as to trigger _ ISD from power supply.
Another possible fault is short-circuit conditions of the PRI+ (see Fig. 4) and ground between.As herein described concrete
In embodiment, the failure condition of short circuit is detected by comparator 408 (see Fig. 4) between PRI- and ground.But, similar PRI+ with
The failure condition of short circuit cannot be detected between ground, because switch S3 413 and S4 414 is always first switched on
(asserted).Due to the selection, electric current will always first flow through current transformer and flow into switch S4 414, then pass through primary
Coil 415, then passes through switch S3 413 streams to resistance 416, finally flows into ground.As FPGA407 ON switch S2 411 and S5
412 and cut off (deassert) switch S3 413 and S4 414 when, due in ignition coil primary 415 flow electricity
Stream, the electric current of current transformer 409 will be forced step change immediately, and ignition coil primary 415 is bigger than current transformer 409
Inductance much.This step change of the electric current of current transformer 409 has the composition of very high frequency, and it can be 409 and 410
Resonance is excited in circuit.This can cause serious ringing effect to be back in current transformer 409, so as to provide the voltage of mistake
Measured value V_HS.In fact, the circuit kinetics for just having described cause _ ISD is useless in this concrete condition.
The circuit can work in the case where switch S2 is always connected first with S5.This makes it possible to pass through _ ISD discoveries
Short-circuit failure condition from PRI+ to ground, but the short-circuit failure condition from PRI- to ground will be difficult to find.
In order to detect mistake when switch S3 413 is connected first with S4 414, the operation of AC ignition systems is slightly different,
As shown in Figure 6.It should be noted that switch S2 411, S3 413, S4 414 and S5 412 are switch mosfets, shape as depicted
State 0 602.Can be for voltage is unidirectional and for electric current is two-way using any although showing switch mosfet
Switch.Specifically, it is possible to use, to imitate the body diode effect of MOSFET, this is at this for the parallel combination of IGBT and diode
It is known in field.
During the exemplary operation without any fault, AC ignition systems are operated as follows.With before
It is similar, an AC ignition cycles are by the conducting of S3 413 and S4 414, state as depicted 1 604.Reach peak value electricity
After stream, S3 413 and S4 414 are turned off, and start second switch circulation.But, it is different from conducting switch S2 411 and S5 412
, all switch S2 411, S3 413, S4 414 and S5 412 are maintained at scram position.Now, negative current flows through
Primary coil 415.When four switch mosfets are all turned off and are occurred without abnormal short circuit, switch mosfet S2 411
Rectification is carried out with the body diode of S5 412, the electric current for making primary coil 415 flows through S2 411 and the structures of S5 412, similar to opening
Close the on-state of S2 411 and S5 412, state as depicted 2 606.Because the body diode of S2 411 and S5412 enters
Row rectification, the voltage being applied on primary coil 415 is equal to Vboost, VboostNormal current is driven to flow through primary coil 415 again,
If S2 411 and S5 412 have been switched on, will be it is observed that above-mentioned situation.The flowing of reverse current will be very of short duration, therefore
Once _ IFB_LO comparators send to FPGA407 (see Fig. 4) flows through the electric current of primary coil 415 signal movable as expected, open
Close S2 411 actually will be connected with S5 412 by FPGA control circuit 400, state as depicted 3 608.
Fig. 7 illustrates the normal operating of the additional step.It should be noted that in S3, after S4 instructional waveforms 706 are cut off, S2, S5
Instructional waveform 704 is in and the identical state of S3, S4 instructional waveform 706, until the trailing edge of _ IFB_LO waveforms 714 shows stream
The electric current for crossing primary coil 412 is movable as expected.Now, S2, S5 instructional waveform 704 and S3, S4 instructional waveform 706 recover them
Normal work.
When short-circuit conditions actually occur at terminals P RI+ (see Fig. 4) and ground between, extra mode of operation is attached to
Different current characteristics will be caused on two switching intervals.Fig. 8 describes the behaviour of the AC ignition systems in the presence of this specific fault
Make.State 0 802 shows short-circuit conditions 801.Behind first switch interval, state 1 804 shows, in primary coil 415
There is negative current.As S2 411, when the control signal of S5 412, S3 413, S4 414 is all cut off, short-circuit conditions 801 will not permit
Perhaps the body diode self-rectifyings of S2 411, this will cause the electric current from the body diodes of S5 412 to pass through short dot stream to ground, such as shape
Shown in state 2 806.Other current path will cause the electric current of the relative time for flowing through primary coil 415 caused by short-circuit conditions
Change (di/dt) is much smaller, and this will be occurred without with _ IFB_MID trailing edges by control signal _ IFB_LO or very late be occurred
And detect.
Timing diagram shown in Fig. 9 show exist PRI+ to ground short-circuit conditions when circuit operation.It should be noted that working as
When S3, S4 instructional waveform 906 is connected, how the electric current in primary coil 415 works as expected, such as IPShown in 902.But
During state 2 806, when all switches are maintained at scram position, the electric current in primary coil 415 is unlike its normal work
Performance when making is such.Due to short-circuit conditions 801, IPSubstantially reduce the change of its relative time；Therefore V_IFB can not or
At least very slowly reaching makes comparator 405 or comparator 406 cause the _ level that reduces of IFB_MID or _ IFB_LO, such as V_IFB
Shown in waveform 908.Therefore, when _ IFB_MID or _ IFB_LO is triggered when having spent the long time in FPGA407, PRI is detected
+ to the short-circuit conditions 801 on ground.
The process of failure condition of the detection from PRI+ to ground short circuit need not be carried out in each ignition cycle.FPGA is controlled
Circuit 400 can implement the process in the circulation of interval.
Except detecting fault, FPGA control circuit 400 can also detect the spark of the part as AC ignition systems
The deterioration of the spark gap of plug.Time one is grown, and with the Reusability of spark plug, spark interval will slowly corrode.Spark interval
Become big due to corrosion, increase the voltage needed for the gas breakdown or ionizing between sparking-plug electrode.The electricity of this increase
The increase that pressure demand reaches the time needed for its peak value with primary current is associated, such as comparator 404 _ IFB_PK outputs
Shown (see Fig. 4).FPGA control circuit 400 can monitor _ and IFB_PK is switched on the required time, and by itself and inquiry table
Or in itself previously known mathematical function is associated.
Figure 10 shows an example of above-mentioned relation.Specifically, Figure 10 illustrates multiple waveforms, and these waveforms represent right
Ying Yu be applied to the different breakdown voltage on spark gap (15kV 1002,20kV1004,25kV 1006,30kV 1008,
35kV 1010,38kV 1012) and flow through the electric current of primary coil 415 (see Fig. 4).And, in the situation shown in waveform 1014
Ignition system is unable to disruptive spark plug gap.Figure 10 is shown with breakdown voltage increase, the peak value (_ IFB_PK) of primary current
Extending in time becomes more late.If do not punctured, as shown in waveform 1014, the electric current phase of primary coil 415 is flow through
It is significantly less (such as waveform 1002,1004,1006,1008,1010 and 1012 than puncturing situation during generation to the rate of change of time
It is shown).
Value in Figure 10, although show the operation of system, but by no means imply that the restriction to system operatio.And,
Although the electric current that primary coil 415 is flow through when puncturing generation is shown as -100 amperes, the value of gamut can.
In addition, the technology can be used not only to determine spark plug corrosion, and can be used to detecting AC ignition systems 419 (see
Fig. 4) the situation about can not starting of primary side.In this case, FPGA control circuit 400, by detection _ IFB_PK, by energy
Enough detect that the electric current in primary coil reaches the situation of peak value overspending time, or can detect and can not reach peak point current
Situation.FPGA control circuit 400 detection _ IFB_PK is switched on before time, it is corresponding in the time is more than inquiry table
During time value, FPGA control circuit will detect situation about can not starting.
It should be noted that in the whole description of the embodiment of above-mentioned control system, prefix " _ " occurs in _ ISD, _ IFB_PK, _
In IFB_MID and _ IFB_LO signals, represent that they are effective low signals.This is not intended to limit aforementioned signal need not
Not for AC ignition systems effective low signal realizing desired function.Accordingly, there exist _ ISD, IFB_PK, IFB_MID and
IFB_LO signals are not the second embodiments of effective low signal.
Above-mentioned control system is operable in the ignition system of several types.Although the embodiment description before all
Control system be used for AC ignition systems, but can be used for DC ignition systems.For example, above-mentioned control system is applied to
PWM DC ignition systems have DC output currents and MOSFET and substitute the diode network of half-bridge switch network (as herein
The AC systems of description are such).
In addition, the control system is also applied for various engines type.For example, there is starting for 16 spark plugs at one
On machine, 16 private driveways that 16 channel system channel AC ignition systems include having 32 switches are multiplexed, typically
Six shared branch roads with 12 switches.When switch is embodied as N- passage FET, using door patrolling switch controller is driven
Collect and be converted to the driving level that be enough to Operation switch.In one embodiment, 22 half-bridge drivers are used to drive 16 access points
44 FET in fiery system.Each shared branch road is coupled to corresponding boost converter, and all 44 switches can be by one
PWM controller is controlled, and its operation had been generally described before.
In reciprocating engine, cylinder is generally lighted a fire in a predefined order.Therefore there may be weight between adjacent igniting
It is folded.The probability of this overlap increases with the increase of number of cylinders, increases with the growth of spark duration, for
Probability is bigger for the electromotor of asymmetric ignition order.For example, the 16 cylinder four-stroke electromotors with symmetrical ignition order
Igniting output carry out every 45 degree, i.e. 720 degree/16=45 degree.In 1800RPM, 1 degree=92.59 microseconds cause to be output as
Light a fire once per 4.167 milliseconds.If the maximum spark persistent period is such as 2 milliseconds, will be without overlap between each igniting.
But, 16 Cylinder engines with 15-75 asymmetric ignition order there may be such igniting and overlap.
1800RPM, has 1.39 milliseconds i.e. 15 degree to overlap between these ignition orders.In this case, if spark duration is 2 millis
Second, some overlaps are possible.There are exemplary 16 channel ignition system 300 shown in Fig. 3 the 3 of four Fig. 1 shown types to lead to
Road ignition system module 302, module therein includes elements shown in phantom.Ignition system 300 also includes class shown in two Fig. 1
2 channel ignition system modules 304 of type, the wherein module do not include elements shown in phantom.Four 3 channel ignition system modules
302 and two 2 channel ignition system modules be connected to 16 spark plugs of electromotor 306.Traditional non-multiplexed AC igniting
System may need 64 switches (four, each spark plug) to operate 16 Cylinder engines 306.But, ignition system 300 it is many
Road repeatedly used features allow that same 16 Cylinder engine 306 utilizes 44 switchs.Special of ignition system module 302,304
Road is using 32 switches, and the shared branch road in those modules uses 12 switches.Common switch controller 150 (is shown in Fig. 1)
Can be used for operation all 44 switches.
This design breaker in middle controller 150 accurately adjusts the levels of current in the armature winding of each transformator, this
Planting design allows to control CA independently of SD, while the OCV for maintaining like.Additionally, embodiments of the invention are intended to before enforcement
The design of costliness is not adopted while stating ignition system feature, i.e., does not adopt centre-tapped transformer, high pressure, high current half
Conductor, resonance circuit or high energy storage ignition coil.
All close with references manner including all lists of references including publications, patent applications and patents cited herein
It is incorporated herein, reaches as each list of references is individually into integrate with the application with references manner simultaneously with special instructions
And its full text same degree set forth herein.
Term " one ", " one " used in description present disclosure (the especially contents of following claims) and
" being somebody's turn to do " and similar term shall be interpreted as including odd number and plural number, unless otherwise indicated herein or otherwise clearly contradicted.Term
"comprising", " having ", " including ", " containing " shall be interpreted as open-ended term (i.e., it is meant that " including but not limited to "), unless separately
It is described.Numerical range listed herewith only as the shorthand method for indicating respectively each the independent numerical value for falling into the scope,
Unless otherwise indicated herein, and each independent numerical value is combined in the description just as its here is illustrated respectively.This place
All methods of description can be performed in any suitable order, unless otherwise indicated herein or otherwise clearly contradicted.
Any example or exemplary language (for example, " for example ") provided herein is only used for preferably describing the present invention, and without
In the scope of the present invention is limited, Unless Otherwise Requested.Language in description should not be regarded as indicating for implementing this
Bright necessary, any failed call protection element.
The preferred embodiments of the present invention are there has been described, including is used to perform the best mode of the present invention known to inventor.
When described above is read, the change of these preferred embodiments will be apparent to the person skilled in the art.This
Inventor wishes technical staff suitably using this change, and the present inventor expects that the present invention can be with except special herein
Not Miao Shu beyond mode implement.Therefore, the present invention includes whole modifications and equivalent of theme described in claims, described
Claims are attached in the application in the case of applicable law permission.And, the present invention includes said elements in its institute
Any combinations being possible in deforming, unless here is indicated otherwise or otherwise clearly contradicted.
Claims (10)
1. it is a kind of to exchange AC igniters, including：
Switching network, is configured to semi-bridge type structure；
Ignition transformer, the primary coil attached with the load as switching network；
Controller, is configured to controlling switch network；
Comparator network, is configured to be compared AC ignition systems parameter and reference parameter；Wherein comparative result indicates control
Device processed how Operation switch network.
2. AC igniters as claimed in claim 1, wherein the systematic parameter being compared in comparator network and reference
Parameter is voltage.
3. AC igniters as claimed in claim 1, wherein producing the reference parameter by controller.
4. AC igniters as claimed in claim 1, wherein controller are configured to set command value, and the command value indicates stream
Cross the peak point current of the primary coil of ignition transformer.
5. AC igniters as claimed in claim 4, wherein controller is configured to change command value immediately.
6. AC igniters as claimed in claim 1, wherein also including power supply and current sensor, current sensor is constructed
Between power supply and switching network, current sensor is configured to provide and is drawn into the current related of switching network from power supply
Systematic parameter.
7. AC igniters as claimed in claim 6, the output of wherein comparator network is the input to controller.
8. AC igniters as claimed in claim 7, wherein monitoring control devices comparator network determine and flow through ignition transformer
The electric current of primary coil reached time of low spot value and midrange, the low spot value and midrange are indicated by reference parameter.
9. AC igniters as claimed in claim 7, wherein monitoring control devices draw excess compared with reference parameter from power supply
The situation of electric current.
10. a kind of method for controlling ignition system, comprises the steps：
The systematic parameter of measurement initial ignition circulation；
Systematic parameter is compared with the reference parameter of ignition system；
If systematic parameter is displayed in the load of switching network with the comparative result of reference parameter has reached peak point current,
Change the mode of operation of switching network；
A subsequent current cycle in the load of the step of wherein changing the mode of operation of switching network trigger switch network.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/175,311 US8931457B2 (en) | 2009-08-18 | 2011-07-01 | Multiplexing drive circuit for an AC ignition system with current mode control and fault tolerance detection |
| US13/175,311 | 2011-07-01 | ||
| CN201210334125.9A CN102852692B (en) | 2011-07-01 | 2012-06-29 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210334125.9A Division CN102852692B (en) | 2011-07-01 | 2012-06-29 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106593742A true CN106593742A (en) | 2017-04-26 |
| CN106593742B CN106593742B (en) | 2019-09-24 |
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| CN201210334125.9A Expired - Fee Related CN102852692B (en) | 2011-07-01 | 2012-06-29 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
| CN201611216214.8A Expired - Fee Related CN106593742B (en) | 2011-07-01 | 2012-06-29 | Multiplex drive circuit for the AC ignition system with Controlled in Current Mode and Based and fault tolerance detection |
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| CN201210334125.9A Expired - Fee Related CN102852692B (en) | 2011-07-01 | 2012-06-29 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
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| CN110770991A (en) * | 2017-05-23 | 2020-02-07 | 帕西·西姆公司 | Arc fault circuit interrupter |
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| CN102852692B (en) * | 2011-07-01 | 2017-03-01 | 伍德沃德公司 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
| CN106170621B (en) * | 2014-06-06 | 2017-06-23 | 新电元工业株式会社 | Igniter |
| CN113161870B (en) * | 2021-04-15 | 2022-12-02 | 常州易控汽车电子股份有限公司 | Spark plug discharge time detection system |
| CN113311363B (en) * | 2021-04-21 | 2023-04-18 | 潍柴动力股份有限公司 | Method, device, equipment and medium for diagnosing open-circuit fault of secondary coil of engine |
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| JP5201321B2 (en) * | 2007-12-04 | 2013-06-05 | 富士電機株式会社 | Igniter system |
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2012
- 2012-06-29 CN CN201210334125.9A patent/CN102852692B/en not_active Expired - Fee Related
- 2012-06-29 DE DE102012105797A patent/DE102012105797A1/en not_active Withdrawn
- 2012-06-29 CN CN201611216214.8A patent/CN106593742B/en not_active Expired - Fee Related
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| CN1240252A (en) * | 1998-06-19 | 2000-01-05 | 杜卡提·恩勒基公司 | Phase-controlled voltage regulator for motor vehicles and method |
| JP3114120B1 (en) * | 1999-09-21 | 2000-12-04 | 阪神エレクトリック株式会社 | Ignition system |
| US20080121214A1 (en) * | 2004-11-25 | 2008-05-29 | Daimlerchrysler Ag | Rapid Multiple Spark Ignition |
| WO2011022383A2 (en) * | 2009-08-18 | 2011-02-24 | Woodward Governor Company | Multiplexing drive circuit for an ac ignition system |
| CN102852692B (en) * | 2011-07-01 | 2017-03-01 | 伍德沃德公司 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110770991A (en) * | 2017-05-23 | 2020-02-07 | 帕西·西姆公司 | Arc fault circuit interrupter |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012105797A1 (en) | 2013-01-03 |
| CN106593742B (en) | 2019-09-24 |
| CN102852692B (en) | 2017-03-01 |
| CN102852692A (en) | 2013-01-02 |
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